./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:46:40,555 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:46:40,625 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:46:40,632 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:46:40,634 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:46:40,662 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:46:40,664 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:46:40,665 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:46:40,665 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:46:40,666 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:46:40,667 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:46:40,667 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:46:40,668 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:46:40,670 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:46:40,670 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:46:40,671 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:46:40,671 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:46:40,671 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:46:40,671 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:46:40,672 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:46:40,672 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:46:40,673 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:46:40,673 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:46:40,674 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:46:40,674 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:46:40,674 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:46:40,675 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:46:40,675 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:46:40,675 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:46:40,676 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:46:40,676 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:46:40,676 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:46:40,677 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:46:40,677 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:46:40,678 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:46:40,678 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:46:40,678 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:46:40,678 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:46:40,679 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:46:40,679 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:46:40,679 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:46:40,680 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:46:40,680 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2024-10-14 19:46:40,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:46:41,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:46:41,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:46:41,005 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:46:41,006 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:46:41,019 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-10-14 19:46:42,510 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:46:42,694 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:46:42,695 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-10-14 19:46:42,702 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75a544011/714ae0ae2c1a48e0a3bede9082164197/FLAG49c425d62 [2024-10-14 19:46:42,715 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75a544011/714ae0ae2c1a48e0a3bede9082164197 [2024-10-14 19:46:42,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:46:42,719 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:46:42,721 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:46:42,721 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:46:42,726 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:46:42,727 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:46:42" (1/1) ... [2024-10-14 19:46:42,730 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d9872ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:42, skipping insertion in model container [2024-10-14 19:46:42,731 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:46:42" (1/1) ... [2024-10-14 19:46:42,752 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:46:42,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:46:42,973 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) [2024-10-14 19:46:42,974 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1ba08b3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:42, skipping insertion in model container [2024-10-14 19:46:42,974 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:46:42,974 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-14 19:46:42,977 INFO L158 Benchmark]: Toolchain (without parser) took 256.63ms. Allocated memory is still 178.3MB. Free memory was 125.2MB in the beginning and 114.4MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-14 19:46:42,977 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 130.0MB. Free memory is still 106.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 19:46:42,978 INFO L158 Benchmark]: CACSL2BoogieTranslator took 253.71ms. Allocated memory is still 178.3MB. Free memory was 124.9MB in the beginning and 114.8MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-14 19:46:42,979 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 130.0MB. Free memory is still 106.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 253.71ms. Allocated memory is still 178.3MB. Free memory was 124.9MB in the beginning and 114.8MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 94]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:46:45,045 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:46:45,110 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-14 19:46:45,118 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:46:45,118 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:46:45,152 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:46:45,155 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:46:45,156 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:46:45,157 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:46:45,158 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:46:45,159 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:46:45,159 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:46:45,160 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:46:45,163 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:46:45,163 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:46:45,164 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:46:45,164 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:46:45,164 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:46:45,164 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:46:45,164 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:46:45,165 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:46:45,165 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:46:45,165 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:46:45,165 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:46:45,166 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:46:45,166 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-14 19:46:45,166 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:46:45,166 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-14 19:46:45,167 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:46:45,167 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:46:45,167 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:46:45,167 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:46:45,168 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:46:45,168 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:46:45,168 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:46:45,170 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:46:45,170 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:46:45,171 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:46:45,171 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-14 19:46:45,171 INFO L153 SettingsManager]: * Command for external solver=cvc5 --incremental --print-success --lang smt [2024-10-14 19:46:45,172 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:46:45,172 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:46:45,172 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:46:45,173 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:46:45,173 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-14 19:46:45,173 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2024-10-14 19:46:45,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:46:45,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:46:45,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:46:45,534 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:46:45,536 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:46:45,537 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-10-14 19:46:47,146 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:46:47,347 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:46:47,348 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-10-14 19:46:47,355 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c77b7016d/a453686a08694d3e8c58507460033ef3/FLAG9dc5e690f [2024-10-14 19:46:47,368 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c77b7016d/a453686a08694d3e8c58507460033ef3 [2024-10-14 19:46:47,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:46:47,371 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:46:47,373 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:46:47,374 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:46:47,379 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:46:47,380 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:46:47" (1/1) ... [2024-10-14 19:46:47,381 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2777b8de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:47, skipping insertion in model container [2024-10-14 19:46:47,381 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:46:47" (1/1) ... [2024-10-14 19:46:47,406 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:46:47,625 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:46:47,656 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-14 19:46:47,660 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:46:47,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:46:47,685 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:46:47,714 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:46:47,745 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:46:47,746 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:47 WrapperNode [2024-10-14 19:46:47,746 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:46:47,748 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:46:47,748 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:46:47,748 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:46:47,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:47" (1/1) ... [2024-10-14 19:46:47,771 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:47" (1/1) ... [2024-10-14 19:46:47,802 INFO L138 Inliner]: procedures = 24, calls = 20, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 103 [2024-10-14 19:46:47,803 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:46:47,805 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:46:47,805 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:46:47,805 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:46:47,816 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:47" (1/1) ... [2024-10-14 19:46:47,817 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:47" (1/1) ... [2024-10-14 19:46:47,822 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:47" (1/1) ... [2024-10-14 19:46:47,845 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-14 19:46:47,846 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:47" (1/1) ... [2024-10-14 19:46:47,846 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:47" (1/1) ... [2024-10-14 19:46:47,853 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:47" (1/1) ... [2024-10-14 19:46:47,863 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:47" (1/1) ... [2024-10-14 19:46:47,868 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:47" (1/1) ... [2024-10-14 19:46:47,870 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:47" (1/1) ... [2024-10-14 19:46:47,872 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:46:47,877 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:46:47,877 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:46:47,877 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:46:47,880 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:47" (1/1) ... [2024-10-14 19:46:47,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:46:47,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:46:47,917 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 19:46:47,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 19:46:47,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:46:47,971 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 19:46:47,971 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 19:46:47,971 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 19:46:47,971 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 19:46:47,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-14 19:46:47,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-14 19:46:47,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 19:46:47,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-14 19:46:47,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-14 19:46:47,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:46:47,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:46:47,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-14 19:46:47,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-14 19:46:47,976 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 19:46:48,113 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:46:48,116 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:46:48,581 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:46:48,582 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:46:48,812 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:46:48,812 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-14 19:46:48,813 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:46:48 BoogieIcfgContainer [2024-10-14 19:46:48,813 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:46:48,815 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:46:48,815 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:46:48,819 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:46:48,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:46:47" (1/3) ... [2024-10-14 19:46:48,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22fde27f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:46:48, skipping insertion in model container [2024-10-14 19:46:48,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:47" (2/3) ... [2024-10-14 19:46:48,821 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22fde27f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:46:48, skipping insertion in model container [2024-10-14 19:46:48,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:46:48" (3/3) ... [2024-10-14 19:46:48,824 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2024-10-14 19:46:48,838 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:46:48,838 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-10-14 19:46:48,838 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:46:48,883 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 19:46:48,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 110 flow [2024-10-14 19:46:48,956 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2024-10-14 19:46:48,957 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 19:46:48,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 6/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 103 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-10-14 19:46:48,961 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 48 transitions, 110 flow [2024-10-14 19:46:48,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 45 transitions, 102 flow [2024-10-14 19:46:48,980 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:46:48,991 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;@24219d50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:46:48,991 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-10-14 19:46:48,995 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:46:48,995 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-14 19:46:48,995 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:46:48,996 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:46:48,996 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:46:48,997 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:46:49,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:46:49,003 INFO L85 PathProgramCache]: Analyzing trace with hash 459561, now seen corresponding path program 1 times [2024-10-14 19:46:49,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:46:49,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1445199854] [2024-10-14 19:46:49,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:46:49,018 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 [2024-10-14 19:46:49,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:46:49,019 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:46:49,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-14 19:46:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:46:49,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:46:49,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:46:49,168 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 [2024-10-14 19:46:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:46:49,190 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:46:49,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:46:49,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1445199854] [2024-10-14 19:46:49,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1445199854] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:46:49,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:46:49,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:46:49,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056501765] [2024-10-14 19:46:49,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:46:49,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:46:49,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:46:49,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:46:49,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:46:49,298 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-10-14 19:46:49,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2024-10-14 19:46:49,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:46:49,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-10-14 19:46:49,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:46:49,467 INFO L124 PetriNetUnfolderBase]: 101/218 cut-off events. [2024-10-14 19:46:49,467 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-10-14 19:46:49,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 218 events. 101/218 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 810 event pairs, 35 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 329. Up to 143 conditions per place. [2024-10-14 19:46:49,472 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 20 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-10-14 19:46:49,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 138 flow [2024-10-14 19:46:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:46:49,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:46:49,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-10-14 19:46:49,483 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6319444444444444 [2024-10-14 19:46:49,484 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 102 flow. Second operand 3 states and 91 transitions. [2024-10-14 19:46:49,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 138 flow [2024-10-14 19:46:49,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 130 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 19:46:49,489 INFO L231 Difference]: Finished difference. Result has 40 places, 41 transitions, 90 flow [2024-10-14 19:46:49,491 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=40, PETRI_TRANSITIONS=41} [2024-10-14 19:46:49,497 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -6 predicate places. [2024-10-14 19:46:49,497 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 41 transitions, 90 flow [2024-10-14 19:46:49,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2024-10-14 19:46:49,498 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:46:49,498 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:46:49,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2024-10-14 19:46:49,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:46:49,701 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:46:49,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:46:49,702 INFO L85 PathProgramCache]: Analyzing trace with hash 459562, now seen corresponding path program 1 times [2024-10-14 19:46:49,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:46:49,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7548858] [2024-10-14 19:46:49,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:46:49,703 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 [2024-10-14 19:46:49,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:46:49,706 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:46:49,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-14 19:46:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:46:49,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:46:49,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:46:49,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:46:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:46:49,892 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:46:49,899 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:46:49,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7548858] [2024-10-14 19:46:49,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [7548858] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:46:49,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:46:49,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:46:49,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874687217] [2024-10-14 19:46:49,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:46:49,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:46:49,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:46:49,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:46:49,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:46:50,057 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-10-14 19:46:50,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 41 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2024-10-14 19:46:50,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:46:50,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-10-14 19:46:50,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:46:50,268 INFO L124 PetriNetUnfolderBase]: 103/224 cut-off events. [2024-10-14 19:46:50,268 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 19:46:50,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 224 events. 103/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 831 event pairs, 35 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 355. Up to 152 conditions per place. [2024-10-14 19:46:50,272 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 23 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2024-10-14 19:46:50,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 164 flow [2024-10-14 19:46:50,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:46:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:46:50,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-10-14 19:46:50,276 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-14 19:46:50,276 INFO L175 Difference]: Start difference. First operand has 40 places, 41 transitions, 90 flow. Second operand 4 states and 120 transitions. [2024-10-14 19:46:50,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 164 flow [2024-10-14 19:46:50,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:46:50,280 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 142 flow [2024-10-14 19:46:50,280 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2024-10-14 19:46:50,281 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -2 predicate places. [2024-10-14 19:46:50,282 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 142 flow [2024-10-14 19:46:50,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2024-10-14 19:46:50,282 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:46:50,282 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-14 19:46:50,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-10-14 19:46:50,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:46:50,483 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:46:50,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:46:50,485 INFO L85 PathProgramCache]: Analyzing trace with hash 441652740, now seen corresponding path program 1 times [2024-10-14 19:46:50,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:46:50,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1525553006] [2024-10-14 19:46:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:46:50,486 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 [2024-10-14 19:46:50,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:46:50,489 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:46:50,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-14 19:46:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:46:50,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 19:46:50,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:46:50,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:46:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:46:50,735 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:46:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:46:51,007 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:46:51,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1525553006] [2024-10-14 19:46:51,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1525553006] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:46:51,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:46:51,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:46:51,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935191768] [2024-10-14 19:46:51,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:46:51,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:46:51,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:46:51,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:46:51,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:46:51,564 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-10-14 19:46:51,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 142 flow. Second operand has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 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) [2024-10-14 19:46:51,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:46:51,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-10-14 19:46:51,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:46:52,493 INFO L124 PetriNetUnfolderBase]: 109/242 cut-off events. [2024-10-14 19:46:52,493 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-10-14 19:46:52,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 469 conditions, 242 events. 109/242 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 941 event pairs, 35 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 366. Up to 155 conditions per place. [2024-10-14 19:46:52,496 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 23 selfloop transitions, 25 changer transitions 0/65 dead transitions. [2024-10-14 19:46:52,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 65 transitions, 316 flow [2024-10-14 19:46:52,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 19:46:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 19:46:52,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2024-10-14 19:46:52,503 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-10-14 19:46:52,504 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 142 flow. Second operand 10 states and 274 transitions. [2024-10-14 19:46:52,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 65 transitions, 316 flow [2024-10-14 19:46:52,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 65 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:46:52,508 INFO L231 Difference]: Finished difference. Result has 56 places, 65 transitions, 304 flow [2024-10-14 19:46:52,509 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=304, PETRI_PLACES=56, PETRI_TRANSITIONS=65} [2024-10-14 19:46:52,510 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2024-10-14 19:46:52,510 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 65 transitions, 304 flow [2024-10-14 19:46:52,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 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) [2024-10-14 19:46:52,511 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:46:52,511 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:46:52,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-10-14 19:46:52,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:46:52,714 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:46:52,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:46:52,715 INFO L85 PathProgramCache]: Analyzing trace with hash -728139643, now seen corresponding path program 1 times [2024-10-14 19:46:52,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:46:52,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [650852728] [2024-10-14 19:46:52,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:46:52,716 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 [2024-10-14 19:46:52,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:46:52,719 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:46:52,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-14 19:46:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:46:52,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:46:52,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:46:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:46:52,855 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:46:52,856 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:46:52,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [650852728] [2024-10-14 19:46:52,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [650852728] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:46:52,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:46:52,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:46:52,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169594451] [2024-10-14 19:46:52,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:46:52,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:46:52,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:46:52,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:46:52,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:46:52,914 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-10-14 19:46:52,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 65 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-14 19:46:52,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:46:52,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-10-14 19:46:52,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:46:53,080 INFO L124 PetriNetUnfolderBase]: 171/405 cut-off events. [2024-10-14 19:46:53,080 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-10-14 19:46:53,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 837 conditions, 405 events. 171/405 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1972 event pairs, 71 based on Foata normal form. 0/266 useless extension candidates. Maximal degree in co-relation 749. Up to 187 conditions per place. [2024-10-14 19:46:53,088 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 72 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2024-10-14 19:46:53,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 93 transitions, 586 flow [2024-10-14 19:46:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:46:53,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:46:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-10-14 19:46:53,092 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.703125 [2024-10-14 19:46:53,092 INFO L175 Difference]: Start difference. First operand has 56 places, 65 transitions, 304 flow. Second operand 4 states and 135 transitions. [2024-10-14 19:46:53,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 93 transitions, 586 flow [2024-10-14 19:46:53,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 93 transitions, 492 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-10-14 19:46:53,099 INFO L231 Difference]: Finished difference. Result has 56 places, 65 transitions, 249 flow [2024-10-14 19:46:53,102 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=56, PETRI_TRANSITIONS=65} [2024-10-14 19:46:53,103 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2024-10-14 19:46:53,103 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 65 transitions, 249 flow [2024-10-14 19:46:53,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-14 19:46:53,103 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:46:53,104 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:46:53,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-14 19:46:53,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:46:53,304 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:46:53,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:46:53,305 INFO L85 PathProgramCache]: Analyzing trace with hash -225669537, now seen corresponding path program 1 times [2024-10-14 19:46:53,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:46:53,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085760817] [2024-10-14 19:46:53,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:46:53,306 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 [2024-10-14 19:46:53,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:46:53,307 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:46:53,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-14 19:46:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:46:53,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:46:53,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:46:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:46:53,461 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:46:53,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:46:53,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085760817] [2024-10-14 19:46:53,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085760817] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:46:53,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:46:53,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:46:53,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418984594] [2024-10-14 19:46:53,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:46:53,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:46:53,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:46:53,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:46:53,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:46:53,531 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-10-14 19:46:53,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 65 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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) [2024-10-14 19:46:53,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:46:53,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-10-14 19:46:53,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:46:53,751 INFO L124 PetriNetUnfolderBase]: 343/816 cut-off events. [2024-10-14 19:46:53,751 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-10-14 19:46:53,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1514 conditions, 816 events. 343/816 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4811 event pairs, 117 based on Foata normal form. 8/557 useless extension candidates. Maximal degree in co-relation 1438. Up to 239 conditions per place. [2024-10-14 19:46:53,757 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 66 selfloop transitions, 9 changer transitions 0/93 dead transitions. [2024-10-14 19:46:53,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 93 transitions, 464 flow [2024-10-14 19:46:53,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:46:53,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:46:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2024-10-14 19:46:53,760 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-10-14 19:46:53,760 INFO L175 Difference]: Start difference. First operand has 56 places, 65 transitions, 249 flow. Second operand 5 states and 170 transitions. [2024-10-14 19:46:53,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 93 transitions, 464 flow [2024-10-14 19:46:53,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 93 transitions, 460 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 19:46:53,764 INFO L231 Difference]: Finished difference. Result has 61 places, 66 transitions, 278 flow [2024-10-14 19:46:53,764 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=61, PETRI_TRANSITIONS=66} [2024-10-14 19:46:53,765 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2024-10-14 19:46:53,765 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 66 transitions, 278 flow [2024-10-14 19:46:53,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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) [2024-10-14 19:46:53,765 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:46:53,766 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:46:53,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-10-14 19:46:53,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:46:53,967 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:46:53,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:46:53,967 INFO L85 PathProgramCache]: Analyzing trace with hash 330879789, now seen corresponding path program 1 times [2024-10-14 19:46:53,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:46:53,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369342854] [2024-10-14 19:46:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:46:53,968 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 [2024-10-14 19:46:53,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:46:53,970 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:46:53,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-14 19:46:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:46:54,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 19:46:54,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:46:54,039 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 [2024-10-14 19:46:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:46:54,064 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:46:54,064 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:46:54,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369342854] [2024-10-14 19:46:54,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369342854] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:46:54,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:46:54,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:46:54,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98158184] [2024-10-14 19:46:54,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:46:54,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:46:54,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:46:54,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:46:54,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:46:54,129 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-14 19:46:54,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 66 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-10-14 19:46:54,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:46:54,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-14 19:46:54,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:46:54,294 INFO L124 PetriNetUnfolderBase]: 367/807 cut-off events. [2024-10-14 19:46:54,294 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-10-14 19:46:54,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 807 events. 367/807 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4579 event pairs, 212 based on Foata normal form. 0/674 useless extension candidates. Maximal degree in co-relation 1542. Up to 595 conditions per place. [2024-10-14 19:46:54,300 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 43 selfloop transitions, 6 changer transitions 0/64 dead transitions. [2024-10-14 19:46:54,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 64 transitions, 372 flow [2024-10-14 19:46:54,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:46:54,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:46:54,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-10-14 19:46:54,302 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-10-14 19:46:54,302 INFO L175 Difference]: Start difference. First operand has 61 places, 66 transitions, 278 flow. Second operand 4 states and 98 transitions. [2024-10-14 19:46:54,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 64 transitions, 372 flow [2024-10-14 19:46:54,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:46:54,308 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 276 flow [2024-10-14 19:46:54,308 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=276, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2024-10-14 19:46:54,312 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2024-10-14 19:46:54,312 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 276 flow [2024-10-14 19:46:54,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-10-14 19:46:54,313 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:46:54,313 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:46:54,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2024-10-14 19:46:54,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:46:54,514 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:46:54,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:46:54,514 INFO L85 PathProgramCache]: Analyzing trace with hash 330879790, now seen corresponding path program 1 times [2024-10-14 19:46:54,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:46:54,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394144550] [2024-10-14 19:46:54,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:46:54,515 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 [2024-10-14 19:46:54,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:46:54,517 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:46:54,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-14 19:46:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:46:54,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 19:46:54,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:46:54,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:46:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:46:54,747 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:46:54,747 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:46:54,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394144550] [2024-10-14 19:46:54,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394144550] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:46:54,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:46:54,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:46:54,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321057193] [2024-10-14 19:46:54,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:46:54,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 19:46:54,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:46:54,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 19:46:54,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-14 19:46:54,928 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-10-14 19:46:54,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:46:54,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:46:54,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-10-14 19:46:54,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:46:55,278 INFO L124 PetriNetUnfolderBase]: 772/1657 cut-off events. [2024-10-14 19:46:55,278 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2024-10-14 19:46:55,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3227 conditions, 1657 events. 772/1657 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10718 event pairs, 99 based on Foata normal form. 0/1282 useless extension candidates. Maximal degree in co-relation 3146. Up to 647 conditions per place. [2024-10-14 19:46:55,306 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 65 selfloop transitions, 14 changer transitions 0/92 dead transitions. [2024-10-14 19:46:55,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 92 transitions, 499 flow [2024-10-14 19:46:55,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 19:46:55,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 19:46:55,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-10-14 19:46:55,308 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-10-14 19:46:55,308 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 276 flow. Second operand 6 states and 174 transitions. [2024-10-14 19:46:55,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 92 transitions, 499 flow [2024-10-14 19:46:55,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 492 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:46:55,312 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 321 flow [2024-10-14 19:46:55,312 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=321, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-10-14 19:46:55,313 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 19 predicate places. [2024-10-14 19:46:55,313 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 321 flow [2024-10-14 19:46:55,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:46:55,313 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:46:55,314 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:46:55,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-14 19:46:55,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:46:55,515 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:46:55,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:46:55,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1667339291, now seen corresponding path program 1 times [2024-10-14 19:46:55,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:46:55,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2065034900] [2024-10-14 19:46:55,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:46:55,515 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 [2024-10-14 19:46:55,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:46:55,517 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:46:55,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-14 19:46:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:46:55,574 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:46:55,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:46:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:46:55,652 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:46:55,652 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:46:55,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2065034900] [2024-10-14 19:46:55,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2065034900] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:46:55,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:46:55,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:46:55,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64827709] [2024-10-14 19:46:55,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:46:55,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:46:55,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:46:55,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:46:55,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:46:55,720 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-10-14 19:46:55,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-10-14 19:46:55,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:46:55,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-10-14 19:46:55,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:46:55,919 INFO L124 PetriNetUnfolderBase]: 440/961 cut-off events. [2024-10-14 19:46:55,919 INFO L125 PetriNetUnfolderBase]: For 276/290 co-relation queries the response was YES. [2024-10-14 19:46:55,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2125 conditions, 961 events. 440/961 cut-off events. For 276/290 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5560 event pairs, 282 based on Foata normal form. 10/864 useless extension candidates. Maximal degree in co-relation 2039. Up to 661 conditions per place. [2024-10-14 19:46:55,925 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 73 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2024-10-14 19:46:55,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 93 transitions, 595 flow [2024-10-14 19:46:55,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:46:55,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:46:55,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-10-14 19:46:55,926 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6927083333333334 [2024-10-14 19:46:55,927 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 321 flow. Second operand 4 states and 133 transitions. [2024-10-14 19:46:55,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 93 transitions, 595 flow [2024-10-14 19:46:55,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 93 transitions, 572 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:46:55,931 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 312 flow [2024-10-14 19:46:55,931 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2024-10-14 19:46:55,934 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 20 predicate places. [2024-10-14 19:46:55,934 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 312 flow [2024-10-14 19:46:55,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-10-14 19:46:55,935 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:46:55,935 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:46:55,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2024-10-14 19:46:56,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:46:56,136 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:46:56,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:46:56,136 INFO L85 PathProgramCache]: Analyzing trace with hash 117102865, now seen corresponding path program 1 times [2024-10-14 19:46:56,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:46:56,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505718437] [2024-10-14 19:46:56,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:46:56,137 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 [2024-10-14 19:46:56,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:46:56,138 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:46:56,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-14 19:46:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:46:56,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 19:46:56,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:46:56,239 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 [2024-10-14 19:46:56,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:46:56,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:46:56,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 19:46:56,411 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:46:56,411 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 [2024-10-14 19:46:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:46:56,570 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:46:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:46:57,025 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:46:57,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505718437] [2024-10-14 19:46:57,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505718437] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:46:57,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:46:57,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:46:57,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464223198] [2024-10-14 19:46:57,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:46:57,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:46:57,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:46:57,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:46:57,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:46:58,260 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-14 19:46:58,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 312 flow. Second operand has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 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) [2024-10-14 19:46:58,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:46:58,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-14 19:46:58,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:46:59,805 INFO L124 PetriNetUnfolderBase]: 978/2043 cut-off events. [2024-10-14 19:46:59,805 INFO L125 PetriNetUnfolderBase]: For 344/361 co-relation queries the response was YES. [2024-10-14 19:46:59,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4359 conditions, 2043 events. 978/2043 cut-off events. For 344/361 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13789 event pairs, 577 based on Foata normal form. 0/1723 useless extension candidates. Maximal degree in co-relation 4037. Up to 701 conditions per place. [2024-10-14 19:46:59,817 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 73 selfloop transitions, 54 changer transitions 0/142 dead transitions. [2024-10-14 19:46:59,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 142 transitions, 919 flow [2024-10-14 19:46:59,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 19:46:59,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-14 19:46:59,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 369 transitions. [2024-10-14 19:46:59,820 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-10-14 19:46:59,820 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 312 flow. Second operand 15 states and 369 transitions. [2024-10-14 19:46:59,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 142 transitions, 919 flow [2024-10-14 19:46:59,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 142 transitions, 914 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:46:59,825 INFO L231 Difference]: Finished difference. Result has 89 places, 101 transitions, 738 flow [2024-10-14 19:46:59,826 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=738, PETRI_PLACES=89, PETRI_TRANSITIONS=101} [2024-10-14 19:46:59,826 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 43 predicate places. [2024-10-14 19:46:59,827 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 101 transitions, 738 flow [2024-10-14 19:46:59,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 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) [2024-10-14 19:46:59,828 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:46:59,828 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-14 19:46:59,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-10-14 19:47:00,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:00,029 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:47:00,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:00,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1566439314, now seen corresponding path program 2 times [2024-10-14 19:47:00,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:00,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72004982] [2024-10-14 19:47:00,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:47:00,030 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 [2024-10-14 19:47:00,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:00,033 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:00,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-14 19:47:00,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:47:00,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:47:00,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 19:47:00,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:00,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:47:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:47:00,320 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:47:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:47:00,823 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:00,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72004982] [2024-10-14 19:47:00,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72004982] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:47:00,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:47:00,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:47:00,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901513190] [2024-10-14 19:47:00,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:47:00,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:47:00,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:00,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:47:00,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:47:02,237 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-10-14 19:47:02,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 101 transitions, 738 flow. Second operand has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 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) [2024-10-14 19:47:02,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:02,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-10-14 19:47:02,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:07,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:47:09,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:47:11,113 INFO L124 PetriNetUnfolderBase]: 835/1829 cut-off events. [2024-10-14 19:47:11,114 INFO L125 PetriNetUnfolderBase]: For 940/980 co-relation queries the response was YES. [2024-10-14 19:47:11,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4518 conditions, 1829 events. 835/1829 cut-off events. For 940/980 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12405 event pairs, 541 based on Foata normal form. 30/1612 useless extension candidates. Maximal degree in co-relation 4338. Up to 1451 conditions per place. [2024-10-14 19:47:11,131 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 30 selfloop transitions, 113 changer transitions 0/161 dead transitions. [2024-10-14 19:47:11,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 161 transitions, 1528 flow [2024-10-14 19:47:11,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 19:47:11,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-14 19:47:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 580 transitions. [2024-10-14 19:47:11,134 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5492424242424242 [2024-10-14 19:47:11,134 INFO L175 Difference]: Start difference. First operand has 89 places, 101 transitions, 738 flow. Second operand 22 states and 580 transitions. [2024-10-14 19:47:11,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 161 transitions, 1528 flow [2024-10-14 19:47:11,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 161 transitions, 1528 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:47:11,143 INFO L231 Difference]: Finished difference. Result has 116 places, 161 transitions, 1558 flow [2024-10-14 19:47:11,144 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1558, PETRI_PLACES=116, PETRI_TRANSITIONS=161} [2024-10-14 19:47:11,144 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 70 predicate places. [2024-10-14 19:47:11,144 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 161 transitions, 1558 flow [2024-10-14 19:47:11,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 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) [2024-10-14 19:47:11,145 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:11,145 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:11,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2024-10-14 19:47:11,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:11,345 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:47:11,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:11,346 INFO L85 PathProgramCache]: Analyzing trace with hash 117102864, now seen corresponding path program 1 times [2024-10-14 19:47:11,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:11,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243563435] [2024-10-14 19:47:11,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:47:11,346 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 [2024-10-14 19:47:11,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:11,348 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:11,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-14 19:47:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:47:11,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 19:47:11,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:11,433 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 [2024-10-14 19:47:11,460 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-14 19:47:11,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-10-14 19:47:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:47:11,480 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:47:11,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:11,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1243563435] [2024-10-14 19:47:11,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1243563435] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:47:11,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:47:11,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:47:11,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321862953] [2024-10-14 19:47:11,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:47:11,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:47:11,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:11,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:47:11,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:47:11,550 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-14 19:47:11,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 161 transitions, 1558 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-10-14 19:47:11,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:11,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-14 19:47:11,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:11,847 INFO L124 PetriNetUnfolderBase]: 1096/2324 cut-off events. [2024-10-14 19:47:11,847 INFO L125 PetriNetUnfolderBase]: For 1171/1196 co-relation queries the response was YES. [2024-10-14 19:47:11,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5884 conditions, 2324 events. 1096/2324 cut-off events. For 1171/1196 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 16214 event pairs, 776 based on Foata normal form. 80/2311 useless extension candidates. Maximal degree in co-relation 5659. Up to 1842 conditions per place. [2024-10-14 19:47:11,866 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 113 selfloop transitions, 31 changer transitions 0/159 dead transitions. [2024-10-14 19:47:11,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 159 transitions, 1842 flow [2024-10-14 19:47:11,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:47:11,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:47:11,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-10-14 19:47:11,867 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-10-14 19:47:11,867 INFO L175 Difference]: Start difference. First operand has 116 places, 161 transitions, 1558 flow. Second operand 5 states and 116 transitions. [2024-10-14 19:47:11,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 159 transitions, 1842 flow [2024-10-14 19:47:11,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 1550 flow, removed 87 selfloop flow, removed 9 redundant places. [2024-10-14 19:47:11,883 INFO L231 Difference]: Finished difference. Result has 109 places, 159 transitions, 1324 flow [2024-10-14 19:47:11,883 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1324, PETRI_PLACES=109, PETRI_TRANSITIONS=159} [2024-10-14 19:47:11,884 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 63 predicate places. [2024-10-14 19:47:11,884 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 159 transitions, 1324 flow [2024-10-14 19:47:11,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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) [2024-10-14 19:47:11,887 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:11,887 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:11,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2024-10-14 19:47:12,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:12,088 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:47:12,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:12,088 INFO L85 PathProgramCache]: Analyzing trace with hash -664778099, now seen corresponding path program 1 times [2024-10-14 19:47:12,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:12,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087894224] [2024-10-14 19:47:12,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:47:12,089 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 [2024-10-14 19:47:12,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:12,090 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:12,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-14 19:47:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:47:12,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 19:47:12,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:47:12,263 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:47:12,374 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 35 treesize of output 31 [2024-10-14 19:47:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:47:12,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:12,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087894224] [2024-10-14 19:47:12,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087894224] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:47:12,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:47:12,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:47:12,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416115434] [2024-10-14 19:47:12,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:47:12,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:47:12,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:12,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:47:12,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:47:12,868 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-10-14 19:47:12,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 159 transitions, 1324 flow. Second operand has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 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) [2024-10-14 19:47:12,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:12,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-10-14 19:47:12,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:13,442 INFO L124 PetriNetUnfolderBase]: 896/1917 cut-off events. [2024-10-14 19:47:13,442 INFO L125 PetriNetUnfolderBase]: For 918/924 co-relation queries the response was YES. [2024-10-14 19:47:13,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4882 conditions, 1917 events. 896/1917 cut-off events. For 918/924 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12823 event pairs, 472 based on Foata normal form. 32/1765 useless extension candidates. Maximal degree in co-relation 4680. Up to 697 conditions per place. [2024-10-14 19:47:13,459 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 141 selfloop transitions, 44 changer transitions 0/200 dead transitions. [2024-10-14 19:47:13,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 200 transitions, 1800 flow [2024-10-14 19:47:13,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 19:47:13,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-14 19:47:13,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 252 transitions. [2024-10-14 19:47:13,462 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-10-14 19:47:13,462 INFO L175 Difference]: Start difference. First operand has 109 places, 159 transitions, 1324 flow. Second operand 8 states and 252 transitions. [2024-10-14 19:47:13,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 200 transitions, 1800 flow [2024-10-14 19:47:13,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 200 transitions, 1757 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:47:13,474 INFO L231 Difference]: Finished difference. Result has 115 places, 160 transitions, 1400 flow [2024-10-14 19:47:13,475 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1281, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1400, PETRI_PLACES=115, PETRI_TRANSITIONS=160} [2024-10-14 19:47:13,476 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 69 predicate places. [2024-10-14 19:47:13,476 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 160 transitions, 1400 flow [2024-10-14 19:47:13,477 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 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) [2024-10-14 19:47:13,477 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:13,477 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:13,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2024-10-14 19:47:13,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:13,677 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:47:13,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:13,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1501726718, now seen corresponding path program 1 times [2024-10-14 19:47:13,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:13,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428017983] [2024-10-14 19:47:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:47:13,678 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 [2024-10-14 19:47:13,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:13,680 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:13,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-14 19:47:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:47:13,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:47:13,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:47:13,823 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:47:13,823 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:13,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428017983] [2024-10-14 19:47:13,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428017983] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:47:13,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:47:13,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:47:13,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145002126] [2024-10-14 19:47:13,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:47:13,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:47:13,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:13,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:47:13,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:47:13,877 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-10-14 19:47:13,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 160 transitions, 1400 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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) [2024-10-14 19:47:13,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:13,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-10-14 19:47:13,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:14,138 INFO L124 PetriNetUnfolderBase]: 761/1688 cut-off events. [2024-10-14 19:47:14,139 INFO L125 PetriNetUnfolderBase]: For 1863/1877 co-relation queries the response was YES. [2024-10-14 19:47:14,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4538 conditions, 1688 events. 761/1688 cut-off events. For 1863/1877 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 11088 event pairs, 337 based on Foata normal form. 15/1575 useless extension candidates. Maximal degree in co-relation 4325. Up to 758 conditions per place. [2024-10-14 19:47:14,152 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 148 selfloop transitions, 20 changer transitions 0/185 dead transitions. [2024-10-14 19:47:14,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 185 transitions, 1823 flow [2024-10-14 19:47:14,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:47:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:47:14,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-10-14 19:47:14,154 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-10-14 19:47:14,154 INFO L175 Difference]: Start difference. First operand has 115 places, 160 transitions, 1400 flow. Second operand 5 states and 166 transitions. [2024-10-14 19:47:14,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 185 transitions, 1823 flow [2024-10-14 19:47:14,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 185 transitions, 1746 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-10-14 19:47:14,168 INFO L231 Difference]: Finished difference. Result has 116 places, 160 transitions, 1374 flow [2024-10-14 19:47:14,169 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1374, PETRI_PLACES=116, PETRI_TRANSITIONS=160} [2024-10-14 19:47:14,170 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 70 predicate places. [2024-10-14 19:47:14,170 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 160 transitions, 1374 flow [2024-10-14 19:47:14,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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) [2024-10-14 19:47:14,170 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:14,171 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:14,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2024-10-14 19:47:14,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:14,371 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:47:14,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:14,372 INFO L85 PathProgramCache]: Analyzing trace with hash 893638672, now seen corresponding path program 1 times [2024-10-14 19:47:14,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:14,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186089373] [2024-10-14 19:47:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:47:14,372 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 [2024-10-14 19:47:14,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:14,373 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:14,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-10-14 19:47:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:47:14,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 19:47:14,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:14,470 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 [2024-10-14 19:47:14,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:47:14,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:47:14,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 19:47:14,604 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:47:14,604 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 [2024-10-14 19:47:14,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:47:14,730 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:47:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:47:15,109 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:15,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186089373] [2024-10-14 19:47:15,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186089373] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:47:15,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:47:15,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:47:15,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613571795] [2024-10-14 19:47:15,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:47:15,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:47:15,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:15,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:47:15,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:47:15,953 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-14 19:47:15,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 160 transitions, 1374 flow. Second operand has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 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) [2024-10-14 19:47:15,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:15,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-14 19:47:15,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:17,367 INFO L124 PetriNetUnfolderBase]: 1135/2289 cut-off events. [2024-10-14 19:47:17,367 INFO L125 PetriNetUnfolderBase]: For 1727/1735 co-relation queries the response was YES. [2024-10-14 19:47:17,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5947 conditions, 2289 events. 1135/2289 cut-off events. For 1727/1735 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15177 event pairs, 627 based on Foata normal form. 0/2073 useless extension candidates. Maximal degree in co-relation 5732. Up to 917 conditions per place. [2024-10-14 19:47:17,384 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 99 selfloop transitions, 102 changer transitions 0/216 dead transitions. [2024-10-14 19:47:17,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 216 transitions, 2180 flow [2024-10-14 19:47:17,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 19:47:17,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-14 19:47:17,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 369 transitions. [2024-10-14 19:47:17,387 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-10-14 19:47:17,387 INFO L175 Difference]: Start difference. First operand has 116 places, 160 transitions, 1374 flow. Second operand 15 states and 369 transitions. [2024-10-14 19:47:17,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 216 transitions, 2180 flow [2024-10-14 19:47:17,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 216 transitions, 2140 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:47:17,401 INFO L231 Difference]: Finished difference. Result has 130 places, 162 transitions, 1646 flow [2024-10-14 19:47:17,401 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1646, PETRI_PLACES=130, PETRI_TRANSITIONS=162} [2024-10-14 19:47:17,402 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 84 predicate places. [2024-10-14 19:47:17,402 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 162 transitions, 1646 flow [2024-10-14 19:47:17,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 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) [2024-10-14 19:47:17,402 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:17,403 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:17,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2024-10-14 19:47:17,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:17,603 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:47:17,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:17,604 INFO L85 PathProgramCache]: Analyzing trace with hash -309763434, now seen corresponding path program 1 times [2024-10-14 19:47:17,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:17,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [207013577] [2024-10-14 19:47:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:47:17,604 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 [2024-10-14 19:47:17,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:17,607 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:17,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-10-14 19:47:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:47:17,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 19:47:17,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:47:17,799 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:47:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:47:17,914 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:17,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [207013577] [2024-10-14 19:47:17,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [207013577] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:47:17,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:47:17,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-10-14 19:47:17,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519430008] [2024-10-14 19:47:17,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:47:17,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 19:47:17,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:17,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 19:47:17,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-10-14 19:47:18,122 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-10-14 19:47:18,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 162 transitions, 1646 flow. Second operand has 12 states, 12 states have (on average 24.833333333333332) internal successors, (298), 12 states have internal predecessors, (298), 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) [2024-10-14 19:47:18,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:18,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-10-14 19:47:18,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:18,625 INFO L124 PetriNetUnfolderBase]: 1006/2198 cut-off events. [2024-10-14 19:47:18,625 INFO L125 PetriNetUnfolderBase]: For 1891/1905 co-relation queries the response was YES. [2024-10-14 19:47:18,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6210 conditions, 2198 events. 1006/2198 cut-off events. For 1891/1905 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 15132 event pairs, 708 based on Foata normal form. 18/2032 useless extension candidates. Maximal degree in co-relation 5970. Up to 1194 conditions per place. [2024-10-14 19:47:18,635 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 145 selfloop transitions, 69 changer transitions 0/233 dead transitions. [2024-10-14 19:47:18,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 233 transitions, 2546 flow [2024-10-14 19:47:18,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 19:47:18,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 19:47:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 282 transitions. [2024-10-14 19:47:18,638 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-10-14 19:47:18,638 INFO L175 Difference]: Start difference. First operand has 130 places, 162 transitions, 1646 flow. Second operand 9 states and 282 transitions. [2024-10-14 19:47:18,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 233 transitions, 2546 flow [2024-10-14 19:47:18,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 233 transitions, 2420 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-10-14 19:47:18,657 INFO L231 Difference]: Finished difference. Result has 130 places, 177 transitions, 1997 flow [2024-10-14 19:47:18,657 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1535, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1997, PETRI_PLACES=130, PETRI_TRANSITIONS=177} [2024-10-14 19:47:18,658 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 84 predicate places. [2024-10-14 19:47:18,658 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 177 transitions, 1997 flow [2024-10-14 19:47:18,658 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.833333333333332) internal successors, (298), 12 states have internal predecessors, (298), 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) [2024-10-14 19:47:18,659 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:18,659 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:18,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2024-10-14 19:47:18,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:18,859 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:47:18,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:18,860 INFO L85 PathProgramCache]: Analyzing trace with hash -682011562, now seen corresponding path program 1 times [2024-10-14 19:47:18,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:18,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628677648] [2024-10-14 19:47:18,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:47:18,860 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 [2024-10-14 19:47:18,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:18,862 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:18,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-10-14 19:47:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:47:18,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:47:18,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:47:18,956 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:47:18,956 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:18,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628677648] [2024-10-14 19:47:18,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628677648] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:47:18,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:47:18,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:47:18,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952314452] [2024-10-14 19:47:18,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:47:18,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:47:18,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:18,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:47:18,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:47:18,992 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2024-10-14 19:47:18,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 177 transitions, 1997 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-10-14 19:47:18,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:18,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2024-10-14 19:47:18,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:19,225 INFO L124 PetriNetUnfolderBase]: 959/2180 cut-off events. [2024-10-14 19:47:19,226 INFO L125 PetriNetUnfolderBase]: For 2755/2860 co-relation queries the response was YES. [2024-10-14 19:47:19,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6298 conditions, 2180 events. 959/2180 cut-off events. For 2755/2860 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 15139 event pairs, 339 based on Foata normal form. 12/2084 useless extension candidates. Maximal degree in co-relation 6063. Up to 983 conditions per place. [2024-10-14 19:47:19,236 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 160 selfloop transitions, 5 changer transitions 7/192 dead transitions. [2024-10-14 19:47:19,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 192 transitions, 2405 flow [2024-10-14 19:47:19,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:47:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:47:19,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-10-14 19:47:19,237 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-10-14 19:47:19,237 INFO L175 Difference]: Start difference. First operand has 130 places, 177 transitions, 1997 flow. Second operand 3 states and 108 transitions. [2024-10-14 19:47:19,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 192 transitions, 2405 flow [2024-10-14 19:47:19,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 192 transitions, 2399 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:47:19,255 INFO L231 Difference]: Finished difference. Result has 131 places, 175 transitions, 1947 flow [2024-10-14 19:47:19,256 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1947, PETRI_PLACES=131, PETRI_TRANSITIONS=175} [2024-10-14 19:47:19,256 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 85 predicate places. [2024-10-14 19:47:19,256 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 175 transitions, 1947 flow [2024-10-14 19:47:19,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-10-14 19:47:19,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:19,256 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:19,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2024-10-14 19:47:19,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:19,457 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:47:19,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:19,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2112196417, now seen corresponding path program 1 times [2024-10-14 19:47:19,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:19,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723365316] [2024-10-14 19:47:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:47:19,458 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 [2024-10-14 19:47:19,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:19,459 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:19,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-10-14 19:47:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:47:19,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-14 19:47:19,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:19,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:47:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:47:19,751 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:47:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:47:20,342 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:20,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723365316] [2024-10-14 19:47:20,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723365316] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:47:20,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:47:20,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:47:20,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83776566] [2024-10-14 19:47:20,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:47:20,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:47:20,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:20,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:47:20,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:47:21,212 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-10-14 19:47:21,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 175 transitions, 1947 flow. Second operand has 14 states, 14 states have (on average 22.142857142857142) internal successors, (310), 14 states have internal predecessors, (310), 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) [2024-10-14 19:47:21,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:21,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-10-14 19:47:21,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:22,574 INFO L124 PetriNetUnfolderBase]: 2478/4847 cut-off events. [2024-10-14 19:47:22,574 INFO L125 PetriNetUnfolderBase]: For 5370/5393 co-relation queries the response was YES. [2024-10-14 19:47:22,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13709 conditions, 4847 events. 2478/4847 cut-off events. For 5370/5393 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 33393 event pairs, 134 based on Foata normal form. 138/4956 useless extension candidates. Maximal degree in co-relation 13472. Up to 915 conditions per place. [2024-10-14 19:47:22,606 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 238 selfloop transitions, 38 changer transitions 1/290 dead transitions. [2024-10-14 19:47:22,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 290 transitions, 3026 flow [2024-10-14 19:47:22,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 19:47:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 19:47:22,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 368 transitions. [2024-10-14 19:47:22,609 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-10-14 19:47:22,609 INFO L175 Difference]: Start difference. First operand has 131 places, 175 transitions, 1947 flow. Second operand 12 states and 368 transitions. [2024-10-14 19:47:22,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 290 transitions, 3026 flow [2024-10-14 19:47:22,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 290 transitions, 3012 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-10-14 19:47:22,638 INFO L231 Difference]: Finished difference. Result has 138 places, 182 transitions, 2065 flow [2024-10-14 19:47:22,639 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1933, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2065, PETRI_PLACES=138, PETRI_TRANSITIONS=182} [2024-10-14 19:47:22,641 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 92 predicate places. [2024-10-14 19:47:22,641 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 182 transitions, 2065 flow [2024-10-14 19:47:22,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 22.142857142857142) internal successors, (310), 14 states have internal predecessors, (310), 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) [2024-10-14 19:47:22,641 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:22,641 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:22,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2024-10-14 19:47:22,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:22,842 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:47:22,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:22,843 INFO L85 PathProgramCache]: Analyzing trace with hash 206428191, now seen corresponding path program 2 times [2024-10-14 19:47:22,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:22,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336287326] [2024-10-14 19:47:22,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:47:22,844 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 [2024-10-14 19:47:22,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:22,846 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:22,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2024-10-14 19:47:22,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 19:47:22,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:47:22,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-14 19:47:22,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:22,913 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 [2024-10-14 19:47:22,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:47:23,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:47:23,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 19:47:23,105 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:47:23,106 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 [2024-10-14 19:47:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-14 19:47:23,208 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:47:23,209 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:23,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336287326] [2024-10-14 19:47:23,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336287326] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:47:23,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:47:23,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:47:23,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112634001] [2024-10-14 19:47:23,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:47:23,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:47:23,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:23,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:47:23,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:47:23,387 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-14 19:47:23,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 182 transitions, 2065 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2024-10-14 19:47:23,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:23,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-14 19:47:23,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:24,062 INFO L124 PetriNetUnfolderBase]: 2585/5341 cut-off events. [2024-10-14 19:47:24,062 INFO L125 PetriNetUnfolderBase]: For 7405/7520 co-relation queries the response was YES. [2024-10-14 19:47:24,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16048 conditions, 5341 events. 2585/5341 cut-off events. For 7405/7520 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 39111 event pairs, 489 based on Foata normal form. 56/5337 useless extension candidates. Maximal degree in co-relation 15802. Up to 2113 conditions per place. [2024-10-14 19:47:24,140 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 174 selfloop transitions, 19 changer transitions 1/213 dead transitions. [2024-10-14 19:47:24,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 213 transitions, 2575 flow [2024-10-14 19:47:24,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:47:24,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:47:24,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-10-14 19:47:24,142 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-10-14 19:47:24,142 INFO L175 Difference]: Start difference. First operand has 138 places, 182 transitions, 2065 flow. Second operand 5 states and 145 transitions. [2024-10-14 19:47:24,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 213 transitions, 2575 flow [2024-10-14 19:47:24,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 213 transitions, 2506 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-10-14 19:47:24,172 INFO L231 Difference]: Finished difference. Result has 140 places, 185 transitions, 2085 flow [2024-10-14 19:47:24,172 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2085, PETRI_PLACES=140, PETRI_TRANSITIONS=185} [2024-10-14 19:47:24,173 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 94 predicate places. [2024-10-14 19:47:24,173 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 185 transitions, 2085 flow [2024-10-14 19:47:24,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2024-10-14 19:47:24,173 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:24,173 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:24,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2024-10-14 19:47:24,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:24,376 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:47:24,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:24,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1205730928, now seen corresponding path program 2 times [2024-10-14 19:47:24,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:24,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073294827] [2024-10-14 19:47:24,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:47:24,377 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 [2024-10-14 19:47:24,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:24,379 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:24,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2024-10-14 19:47:24,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:47:24,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:47:24,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 19:47:24,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:24,467 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 [2024-10-14 19:47:24,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-14 19:47:24,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:47:24,534 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 [2024-10-14 19:47:24,549 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:47:24,550 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 [2024-10-14 19:47:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:47:24,635 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:47:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:47:29,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:29,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073294827] [2024-10-14 19:47:29,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073294827] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:47:29,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:47:29,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-14 19:47:29,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008164308] [2024-10-14 19:47:29,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:47:29,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 19:47:29,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:29,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 19:47:29,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=99, Unknown=1, NotChecked=0, Total=132 [2024-10-14 19:47:34,105 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] [2024-10-14 19:47:34,697 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-10-14 19:47:34,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 185 transitions, 2085 flow. Second operand has 12 states, 12 states have (on average 19.166666666666668) internal successors, (230), 12 states have internal predecessors, (230), 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) [2024-10-14 19:47:34,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:34,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-10-14 19:47:34,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:36,132 INFO L124 PetriNetUnfolderBase]: 2769/5979 cut-off events. [2024-10-14 19:47:36,133 INFO L125 PetriNetUnfolderBase]: For 7788/7876 co-relation queries the response was YES. [2024-10-14 19:47:36,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17516 conditions, 5979 events. 2769/5979 cut-off events. For 7788/7876 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 47200 event pairs, 1366 based on Foata normal form. 62/5685 useless extension candidates. Maximal degree in co-relation 17276. Up to 1634 conditions per place. [2024-10-14 19:47:36,179 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 172 selfloop transitions, 49 changer transitions 0/244 dead transitions. [2024-10-14 19:47:36,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 244 transitions, 2854 flow [2024-10-14 19:47:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 19:47:36,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 19:47:36,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 276 transitions. [2024-10-14 19:47:36,182 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-10-14 19:47:36,182 INFO L175 Difference]: Start difference. First operand has 140 places, 185 transitions, 2085 flow. Second operand 11 states and 276 transitions. [2024-10-14 19:47:36,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 244 transitions, 2854 flow [2024-10-14 19:47:36,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 244 transitions, 2809 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-14 19:47:36,216 INFO L231 Difference]: Finished difference. Result has 149 places, 195 transitions, 2260 flow [2024-10-14 19:47:36,217 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2047, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2260, PETRI_PLACES=149, PETRI_TRANSITIONS=195} [2024-10-14 19:47:36,217 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 103 predicate places. [2024-10-14 19:47:36,217 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 195 transitions, 2260 flow [2024-10-14 19:47:36,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.166666666666668) internal successors, (230), 12 states have internal predecessors, (230), 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) [2024-10-14 19:47:36,218 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:36,218 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:36,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2024-10-14 19:47:36,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:36,419 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:47:36,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:36,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1277046514, now seen corresponding path program 1 times [2024-10-14 19:47:36,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:36,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003328706] [2024-10-14 19:47:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:47:36,420 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 [2024-10-14 19:47:36,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:36,422 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:36,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2024-10-14 19:47:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:47:36,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-14 19:47:36,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:36,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:47:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 19:47:36,784 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:47:37,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 19:47:37,654 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:37,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003328706] [2024-10-14 19:47:37,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003328706] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:47:37,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:47:37,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:47:37,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965711918] [2024-10-14 19:47:37,655 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:47:37,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:47:37,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:37,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:47:37,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:47:38,589 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-10-14 19:47:38,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 195 transitions, 2260 flow. Second operand has 14 states, 14 states have (on average 21.857142857142858) internal successors, (306), 14 states have internal predecessors, (306), 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) [2024-10-14 19:47:38,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:38,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-10-14 19:47:38,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:40,535 INFO L124 PetriNetUnfolderBase]: 4602/9190 cut-off events. [2024-10-14 19:47:40,535 INFO L125 PetriNetUnfolderBase]: For 14339/14516 co-relation queries the response was YES. [2024-10-14 19:47:40,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28084 conditions, 9190 events. 4602/9190 cut-off events. For 14339/14516 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 70749 event pairs, 380 based on Foata normal form. 205/9268 useless extension candidates. Maximal degree in co-relation 27844. Up to 2453 conditions per place. [2024-10-14 19:47:40,580 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 264 selfloop transitions, 45 changer transitions 1/332 dead transitions. [2024-10-14 19:47:40,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 332 transitions, 3491 flow [2024-10-14 19:47:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 19:47:40,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 19:47:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 382 transitions. [2024-10-14 19:47:40,583 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6631944444444444 [2024-10-14 19:47:40,583 INFO L175 Difference]: Start difference. First operand has 149 places, 195 transitions, 2260 flow. Second operand 12 states and 382 transitions. [2024-10-14 19:47:40,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 332 transitions, 3491 flow [2024-10-14 19:47:40,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 332 transitions, 3403 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-10-14 19:47:40,624 INFO L231 Difference]: Finished difference. Result has 157 places, 203 transitions, 2365 flow [2024-10-14 19:47:40,624 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2365, PETRI_PLACES=157, PETRI_TRANSITIONS=203} [2024-10-14 19:47:40,624 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 111 predicate places. [2024-10-14 19:47:40,624 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 203 transitions, 2365 flow [2024-10-14 19:47:40,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.857142857142858) internal successors, (306), 14 states have internal predecessors, (306), 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) [2024-10-14 19:47:40,625 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:40,625 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:40,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2024-10-14 19:47:40,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:40,825 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:47:40,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:40,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1053579093, now seen corresponding path program 1 times [2024-10-14 19:47:40,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:40,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071760452] [2024-10-14 19:47:40,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:47:40,826 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 [2024-10-14 19:47:40,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:40,828 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:40,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2024-10-14 19:47:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:47:40,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 19:47:40,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:47:41,038 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:47:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:47:41,158 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:41,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071760452] [2024-10-14 19:47:41,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071760452] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:47:41,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:47:41,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-10-14 19:47:41,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305857316] [2024-10-14 19:47:41,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:47:41,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 19:47:41,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:41,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 19:47:41,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-10-14 19:47:41,368 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-10-14 19:47:41,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 203 transitions, 2365 flow. Second operand has 12 states, 12 states have (on average 25.166666666666668) internal successors, (302), 12 states have internal predecessors, (302), 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) [2024-10-14 19:47:41,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:41,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-10-14 19:47:41,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:42,474 INFO L124 PetriNetUnfolderBase]: 3138/6684 cut-off events. [2024-10-14 19:47:42,474 INFO L125 PetriNetUnfolderBase]: For 14205/14457 co-relation queries the response was YES. [2024-10-14 19:47:42,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20614 conditions, 6684 events. 3138/6684 cut-off events. For 14205/14457 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 52107 event pairs, 2665 based on Foata normal form. 25/6331 useless extension candidates. Maximal degree in co-relation 20323. Up to 4877 conditions per place. [2024-10-14 19:47:42,524 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 129 selfloop transitions, 70 changer transitions 17/247 dead transitions. [2024-10-14 19:47:42,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 247 transitions, 3021 flow [2024-10-14 19:47:42,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 19:47:42,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 19:47:42,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 279 transitions. [2024-10-14 19:47:42,526 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-10-14 19:47:42,526 INFO L175 Difference]: Start difference. First operand has 157 places, 203 transitions, 2365 flow. Second operand 9 states and 279 transitions. [2024-10-14 19:47:42,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 247 transitions, 3021 flow [2024-10-14 19:47:42,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 247 transitions, 2958 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-10-14 19:47:42,566 INFO L231 Difference]: Finished difference. Result has 163 places, 203 transitions, 2453 flow [2024-10-14 19:47:42,567 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2309, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2453, PETRI_PLACES=163, PETRI_TRANSITIONS=203} [2024-10-14 19:47:42,567 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 117 predicate places. [2024-10-14 19:47:42,568 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 203 transitions, 2453 flow [2024-10-14 19:47:42,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 25.166666666666668) internal successors, (302), 12 states have internal predecessors, (302), 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) [2024-10-14 19:47:42,568 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:42,568 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:42,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2024-10-14 19:47:42,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:42,769 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:47:42,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:42,769 INFO L85 PathProgramCache]: Analyzing trace with hash -895297982, now seen corresponding path program 2 times [2024-10-14 19:47:42,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:42,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133347902] [2024-10-14 19:47:42,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:47:42,770 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 [2024-10-14 19:47:42,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:42,772 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:42,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2024-10-14 19:47:42,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 19:47:42,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:47:42,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-14 19:47:42,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:42,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:47:42,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:47:43,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:47:43,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 19:47:43,049 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:47:43,049 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 [2024-10-14 19:47:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-14 19:47:43,189 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:47:43,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:43,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133347902] [2024-10-14 19:47:43,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133347902] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:47:43,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:47:43,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:47:43,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147827966] [2024-10-14 19:47:43,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:47:43,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:47:43,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:43,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:47:43,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:47:43,363 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-14 19:47:43,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 203 transitions, 2453 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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) [2024-10-14 19:47:43,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:43,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-14 19:47:43,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:44,276 INFO L124 PetriNetUnfolderBase]: 4262/8293 cut-off events. [2024-10-14 19:47:44,277 INFO L125 PetriNetUnfolderBase]: For 19738/19900 co-relation queries the response was YES. [2024-10-14 19:47:44,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26985 conditions, 8293 events. 4262/8293 cut-off events. For 19738/19900 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 60853 event pairs, 233 based on Foata normal form. 67/8258 useless extension candidates. Maximal degree in co-relation 26681. Up to 5086 conditions per place. [2024-10-14 19:47:44,337 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 191 selfloop transitions, 20 changer transitions 1/234 dead transitions. [2024-10-14 19:47:44,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 234 transitions, 3035 flow [2024-10-14 19:47:44,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:47:44,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:47:44,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-10-14 19:47:44,339 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-10-14 19:47:44,339 INFO L175 Difference]: Start difference. First operand has 163 places, 203 transitions, 2453 flow. Second operand 5 states and 143 transitions. [2024-10-14 19:47:44,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 234 transitions, 3035 flow [2024-10-14 19:47:44,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 234 transitions, 2898 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-14 19:47:44,396 INFO L231 Difference]: Finished difference. Result has 163 places, 207 transitions, 2418 flow [2024-10-14 19:47:44,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2418, PETRI_PLACES=163, PETRI_TRANSITIONS=207} [2024-10-14 19:47:44,397 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 117 predicate places. [2024-10-14 19:47:44,397 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 207 transitions, 2418 flow [2024-10-14 19:47:44,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 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) [2024-10-14 19:47:44,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:44,397 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:44,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2024-10-14 19:47:44,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:44,598 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:47:44,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:44,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1657256303, now seen corresponding path program 2 times [2024-10-14 19:47:44,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:44,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851579481] [2024-10-14 19:47:44,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:47:44,599 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 [2024-10-14 19:47:44,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:44,600 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:44,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2024-10-14 19:47:44,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:47:44,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:47:44,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 19:47:44,687 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:44,695 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 [2024-10-14 19:47:44,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:47:44,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:47:44,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 19:47:44,776 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:47:44,776 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 [2024-10-14 19:47:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 19:47:44,925 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:47:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 19:47:45,311 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:45,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851579481] [2024-10-14 19:47:45,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851579481] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:47:45,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:47:45,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:47:45,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902641228] [2024-10-14 19:47:45,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:47:45,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:47:45,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:45,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:47:45,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:47:49,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 19:47:50,162 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-10-14 19:47:50,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 207 transitions, 2418 flow. Second operand has 10 states, 10 states have (on average 20.0) internal successors, (200), 10 states have internal predecessors, (200), 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) [2024-10-14 19:47:50,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:50,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-10-14 19:47:50,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:51,622 INFO L124 PetriNetUnfolderBase]: 4407/8535 cut-off events. [2024-10-14 19:47:51,623 INFO L125 PetriNetUnfolderBase]: For 24069/24174 co-relation queries the response was YES. [2024-10-14 19:47:51,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28748 conditions, 8535 events. 4407/8535 cut-off events. For 24069/24174 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 62509 event pairs, 239 based on Foata normal form. 238/8669 useless extension candidates. Maximal degree in co-relation 28453. Up to 2109 conditions per place. [2024-10-14 19:47:51,674 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 290 selfloop transitions, 27 changer transitions 1/339 dead transitions. [2024-10-14 19:47:51,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 339 transitions, 3953 flow [2024-10-14 19:47:51,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 19:47:51,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 19:47:51,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 323 transitions. [2024-10-14 19:47:51,676 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6117424242424242 [2024-10-14 19:47:51,676 INFO L175 Difference]: Start difference. First operand has 163 places, 207 transitions, 2418 flow. Second operand 11 states and 323 transitions. [2024-10-14 19:47:51,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 339 transitions, 3953 flow [2024-10-14 19:47:51,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 339 transitions, 3926 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-10-14 19:47:51,720 INFO L231 Difference]: Finished difference. Result has 174 places, 208 transitions, 2471 flow [2024-10-14 19:47:51,721 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2391, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2471, PETRI_PLACES=174, PETRI_TRANSITIONS=208} [2024-10-14 19:47:51,721 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 128 predicate places. [2024-10-14 19:47:51,721 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 208 transitions, 2471 flow [2024-10-14 19:47:51,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.0) internal successors, (200), 10 states have internal predecessors, (200), 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) [2024-10-14 19:47:51,722 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:51,722 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:51,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2024-10-14 19:47:51,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:51,922 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:47:51,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:51,923 INFO L85 PathProgramCache]: Analyzing trace with hash 327991413, now seen corresponding path program 3 times [2024-10-14 19:47:51,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:51,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803981378] [2024-10-14 19:47:51,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 19:47:51,923 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 [2024-10-14 19:47:51,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:51,924 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:51,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2024-10-14 19:47:52,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 19:47:52,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:47:52,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-14 19:47:52,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:52,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-14 19:47:52,052 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 [2024-10-14 19:47:52,111 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-14 19:47:52,111 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 [2024-10-14 19:47:52,128 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:47:52,128 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 [2024-10-14 19:47:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:47:52,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:47:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:47:55,247 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:55,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803981378] [2024-10-14 19:47:55,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803981378] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:47:55,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:47:55,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2024-10-14 19:47:55,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822242823] [2024-10-14 19:47:55,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:47:55,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 19:47:55,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:55,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 19:47:55,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-10-14 19:47:59,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 19:48:02,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1]