./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.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/popl20-two-queue.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 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:59:16,548 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:59:16,639 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:59:16,643 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:59:16,653 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:59:16,687 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:59:16,687 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:59:16,688 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:59:16,690 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:59:16,691 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:59:16,692 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:59:16,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:59:16,693 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:59:16,693 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:59:16,695 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:59:16,695 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:59:16,695 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:59:16,696 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:59:16,696 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:59:16,696 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:59:16,696 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:59:16,699 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:59:16,700 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:59:16,700 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:59:16,700 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:59:16,700 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:59:16,701 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:59:16,701 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:59:16,701 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:59:16,701 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:59:16,702 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:59:16,702 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:59:16,702 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:59:16,702 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:59:16,702 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:59:16,703 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:59:16,703 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:59:16,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:59:16,704 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:59:16,704 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:59:16,704 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:59:16,705 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:59:16,705 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 [2024-10-14 19:59:16,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:59:16,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:59:16,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:59:16,969 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:59:16,970 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:59:16,971 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2024-10-14 19:59:18,384 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:59:18,590 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:59:18,592 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2024-10-14 19:59:18,605 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13af0055b/a696c4478aed4bb0b8af9f0ba42e18a0/FLAG6417bc000 [2024-10-14 19:59:18,621 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13af0055b/a696c4478aed4bb0b8af9f0ba42e18a0 [2024-10-14 19:59:18,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:59:18,626 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:59:18,629 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:59:18,629 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:59:18,635 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:59:18,636 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:59:18" (1/1) ... [2024-10-14 19:59:18,637 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cbed515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:18, skipping insertion in model container [2024-10-14 19:59:18,637 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:59:18" (1/1) ... [2024-10-14 19:59:18,663 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:59:18,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:59:18,909 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 19:59:18,909 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@29e6d2a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:18, skipping insertion in model container [2024-10-14 19:59:18,910 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:59:18,910 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-14 19:59:18,913 INFO L158 Benchmark]: Toolchain (without parser) took 285.30ms. Allocated memory is still 161.5MB. Free memory was 106.8MB in the beginning and 96.0MB in the end (delta: 10.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-14 19:59:18,913 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 96.5MB. Free memory is still 51.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 19:59:18,914 INFO L158 Benchmark]: CACSL2BoogieTranslator took 281.14ms. Allocated memory is still 161.5MB. Free memory was 106.8MB in the beginning and 96.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-14 19:59:18,916 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 96.5MB. Free memory is still 51.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 281.14ms. Allocated memory is still 161.5MB. Free memory was 106.8MB in the beginning and 96.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 111]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.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 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:59:21,006 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:59:21,082 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-14 19:59:21,089 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:59:21,090 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:59:21,130 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:59:21,131 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:59:21,131 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:59:21,132 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:59:21,134 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:59:21,136 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:59:21,136 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:59:21,137 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:59:21,137 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:59:21,137 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:59:21,138 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:59:21,138 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:59:21,138 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:59:21,139 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:59:21,139 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:59:21,142 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:59:21,143 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:59:21,144 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:59:21,144 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:59:21,144 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:59:21,147 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-14 19:59:21,148 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:59:21,148 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-14 19:59:21,148 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:59:21,148 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:59:21,149 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:59:21,149 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:59:21,149 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:59:21,149 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:59:21,149 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:59:21,150 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:59:21,150 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:59:21,150 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:59:21,150 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-14 19:59:21,150 INFO L153 SettingsManager]: * Command for external solver=cvc5 --incremental --print-success --lang smt [2024-10-14 19:59:21,151 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:59:21,151 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:59:21,151 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:59:21,151 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:59:21,152 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-14 19:59:21,152 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 [2024-10-14 19:59:21,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:59:21,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:59:21,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:59:21,485 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:59:21,486 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:59:21,488 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2024-10-14 19:59:23,065 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:59:23,265 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:59:23,266 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2024-10-14 19:59:23,273 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d7c87731/e7ae7fe7336f4b0ead39be35e0f286a1/FLAG5798a515b [2024-10-14 19:59:23,288 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d7c87731/e7ae7fe7336f4b0ead39be35e0f286a1 [2024-10-14 19:59:23,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:59:23,291 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:59:23,294 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:59:23,294 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:59:23,300 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:59:23,301 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:59:23" (1/1) ... [2024-10-14 19:59:23,304 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76388ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:23, skipping insertion in model container [2024-10-14 19:59:23,304 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:59:23" (1/1) ... [2024-10-14 19:59:23,325 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:59:23,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:59:23,572 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-14 19:59:23,576 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:59:23,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:59:23,606 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:59:23,639 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:59:23,663 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:59:23,664 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:23 WrapperNode [2024-10-14 19:59:23,664 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:59:23,665 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:59:23,665 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:59:23,665 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:59:23,671 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:23" (1/1) ... [2024-10-14 19:59:23,687 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:23" (1/1) ... [2024-10-14 19:59:23,730 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 193 [2024-10-14 19:59:23,732 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:59:23,733 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:59:23,733 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:59:23,733 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:59:23,743 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:23" (1/1) ... [2024-10-14 19:59:23,743 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:23" (1/1) ... [2024-10-14 19:59:23,749 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:23" (1/1) ... [2024-10-14 19:59:23,776 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 19:59:23,776 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:23" (1/1) ... [2024-10-14 19:59:23,776 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:23" (1/1) ... [2024-10-14 19:59:23,790 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:23" (1/1) ... [2024-10-14 19:59:23,795 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:23" (1/1) ... [2024-10-14 19:59:23,797 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:23" (1/1) ... [2024-10-14 19:59:23,802 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:23" (1/1) ... [2024-10-14 19:59:23,805 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:59:23,808 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:59:23,808 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:59:23,808 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:59:23,809 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:23" (1/1) ... [2024-10-14 19:59:23,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:59:23,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:59:23,846 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 19:59:23,850 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 19:59:23,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:59:23,899 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 19:59:23,899 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 19:59:23,899 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 19:59:23,899 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 19:59:23,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-14 19:59:23,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-14 19:59:23,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 19:59:23,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 19:59:23,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 19:59:23,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-14 19:59:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-14 19:59:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:59:23,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:59:23,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-14 19:59:23,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-14 19:59:23,904 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 19:59:24,031 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:59:24,033 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:59:24,485 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:59:24,485 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:59:24,830 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:59:24,830 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-14 19:59:24,831 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:59:24 BoogieIcfgContainer [2024-10-14 19:59:24,831 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:59:24,833 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:59:24,834 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:59:24,837 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:59:24,838 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:59:23" (1/3) ... [2024-10-14 19:59:24,838 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e40f54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:59:24, skipping insertion in model container [2024-10-14 19:59:24,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:23" (2/3) ... [2024-10-14 19:59:24,839 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e40f54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:59:24, skipping insertion in model container [2024-10-14 19:59:24,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:59:24" (3/3) ... [2024-10-14 19:59:24,841 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2024-10-14 19:59:24,856 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:59:24,856 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-10-14 19:59:24,856 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:59:24,913 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 19:59:24,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 44 transitions, 102 flow [2024-10-14 19:59:24,989 INFO L124 PetriNetUnfolderBase]: 4/42 cut-off events. [2024-10-14 19:59:24,990 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 19:59:24,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 42 events. 4/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2024-10-14 19:59:24,995 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 44 transitions, 102 flow [2024-10-14 19:59:24,999 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 41 transitions, 94 flow [2024-10-14 19:59:25,012 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:59:25,022 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;@12e4a6c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:59:25,022 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-10-14 19:59:25,026 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:59:25,026 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-14 19:59:25,026 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:59:25,026 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:25,027 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:59:25,028 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 19:59:25,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:25,034 INFO L85 PathProgramCache]: Analyzing trace with hash 622161, now seen corresponding path program 1 times [2024-10-14 19:59:25,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:25,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355855483] [2024-10-14 19:59:25,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:25,046 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 19:59:25,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:25,049 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 19:59:25,054 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 19:59:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:25,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:59:25,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:25,203 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 19:59:25,230 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 19:59:25,231 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:59:25,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:25,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355855483] [2024-10-14 19:59:25,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355855483] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:59:25,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:59:25,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:59:25,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179133832] [2024-10-14 19:59:25,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:59:25,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:59:25,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:25,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:59:25,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:59:25,297 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-14 19:59:25,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 19:59:25,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:25,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-14 19:59:25,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:25,564 INFO L124 PetriNetUnfolderBase]: 359/589 cut-off events. [2024-10-14 19:59:25,565 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-10-14 19:59:25,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1172 conditions, 589 events. 359/589 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2793 event pairs, 219 based on Foata normal form. 1/359 useless extension candidates. Maximal degree in co-relation 1090. Up to 544 conditions per place. [2024-10-14 19:59:25,575 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 28 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-10-14 19:59:25,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 146 flow [2024-10-14 19:59:25,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:59:25,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:59:25,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2024-10-14 19:59:25,589 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-10-14 19:59:25,590 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 94 flow. Second operand 3 states and 63 transitions. [2024-10-14 19:59:25,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 146 flow [2024-10-14 19:59:25,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 138 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 19:59:25,598 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 82 flow [2024-10-14 19:59:25,601 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2024-10-14 19:59:25,606 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2024-10-14 19:59:25,606 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 82 flow [2024-10-14 19:59:25,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 19:59:25,607 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:25,607 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:59:25,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-10-14 19:59:25,809 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 19:59:25,810 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 19:59:25,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:25,810 INFO L85 PathProgramCache]: Analyzing trace with hash 622162, now seen corresponding path program 1 times [2024-10-14 19:59:25,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:25,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690969632] [2024-10-14 19:59:25,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:25,811 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 19:59:25,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:25,815 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 19:59:25,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-14 19:59:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:25,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 19:59:25,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:25,911 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 19:59:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:59:26,021 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:59:26,021 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:26,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690969632] [2024-10-14 19:59:26,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690969632] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:59:26,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:59:26,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:59:26,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418883273] [2024-10-14 19:59:26,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:59:26,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:59:26,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:26,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:59:26,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:59:26,069 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-14 19:59:26,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 19:59:26,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:26,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-14 19:59:26,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:26,430 INFO L124 PetriNetUnfolderBase]: 361/595 cut-off events. [2024-10-14 19:59:26,431 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-14 19:59:26,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1168 conditions, 595 events. 361/595 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2804 event pairs, 219 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 1132. Up to 553 conditions per place. [2024-10-14 19:59:26,436 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 31 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2024-10-14 19:59:26,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 172 flow [2024-10-14 19:59:26,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:59:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:59:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2024-10-14 19:59:26,438 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-10-14 19:59:26,438 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 82 flow. Second operand 4 states and 80 transitions. [2024-10-14 19:59:26,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 172 flow [2024-10-14 19:59:26,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:59:26,443 INFO L231 Difference]: Finished difference. Result has 42 places, 43 transitions, 134 flow [2024-10-14 19:59:26,445 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=42, PETRI_TRANSITIONS=43} [2024-10-14 19:59:26,446 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -2 predicate places. [2024-10-14 19:59:26,446 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 43 transitions, 134 flow [2024-10-14 19:59:26,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 19:59:26,446 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:26,447 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-14 19:59:26,451 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 19:59:26,649 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 19:59:26,650 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 19:59:26,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:26,651 INFO L85 PathProgramCache]: Analyzing trace with hash 597917297, now seen corresponding path program 1 times [2024-10-14 19:59:26,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:26,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631488089] [2024-10-14 19:59:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:26,652 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 19:59:26,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:26,656 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 19:59:26,658 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 19:59:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:26,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 19:59:26,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:26,733 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 19:59:26,911 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 19:59:26,911 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:59:27,191 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 19:59:27,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:27,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631488089] [2024-10-14 19:59:27,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631488089] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:59:27,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:59:27,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:59:27,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764707583] [2024-10-14 19:59:27,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:59:27,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:59:27,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:27,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:59:27,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:59:27,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-14 19:59:27,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 134 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:27,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:27,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-14 19:59:27,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:28,230 INFO L124 PetriNetUnfolderBase]: 367/613 cut-off events. [2024-10-14 19:59:28,231 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-14 19:59:28,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 613 events. 367/613 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 2949 event pairs, 219 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 1143. Up to 556 conditions per place. [2024-10-14 19:59:28,237 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 31 selfloop transitions, 25 changer transitions 0/61 dead transitions. [2024-10-14 19:59:28,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 61 transitions, 324 flow [2024-10-14 19:59:28,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 19:59:28,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 19:59:28,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-10-14 19:59:28,240 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36818181818181817 [2024-10-14 19:59:28,240 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 134 flow. Second operand 10 states and 162 transitions. [2024-10-14 19:59:28,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 61 transitions, 324 flow [2024-10-14 19:59:28,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 324 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:59:28,246 INFO L231 Difference]: Finished difference. Result has 54 places, 61 transitions, 296 flow [2024-10-14 19:59:28,246 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=296, PETRI_PLACES=54, PETRI_TRANSITIONS=61} [2024-10-14 19:59:28,247 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2024-10-14 19:59:28,248 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 61 transitions, 296 flow [2024-10-14 19:59:28,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:28,248 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:28,248 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:59:28,252 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 19:59:28,449 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 19:59:28,449 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:59:28,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:28,450 INFO L85 PathProgramCache]: Analyzing trace with hash -887109016, now seen corresponding path program 1 times [2024-10-14 19:59:28,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:28,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739869545] [2024-10-14 19:59:28,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:28,451 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 19:59:28,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:28,453 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 19:59:28,454 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 19:59:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:28,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 19:59:28,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:28,517 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 19:59:28,537 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 19:59:28,538 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:59:28,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:28,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739869545] [2024-10-14 19:59:28,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739869545] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:59:28,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:59:28,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:59:28,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494566153] [2024-10-14 19:59:28,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:59:28,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:59:28,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:28,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:59:28,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:59:28,564 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-14 19:59:28,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 61 transitions, 296 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 19:59:28,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:28,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-14 19:59:28,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:28,724 INFO L124 PetriNetUnfolderBase]: 289/496 cut-off events. [2024-10-14 19:59:28,724 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-10-14 19:59:28,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1058 conditions, 496 events. 289/496 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2260 event pairs, 171 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 996. Up to 433 conditions per place. [2024-10-14 19:59:28,728 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 46 selfloop transitions, 6 changer transitions 0/59 dead transitions. [2024-10-14 19:59:28,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 396 flow [2024-10-14 19:59:28,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:59:28,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:59:28,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-10-14 19:59:28,731 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-10-14 19:59:28,731 INFO L175 Difference]: Start difference. First operand has 54 places, 61 transitions, 296 flow. Second operand 4 states and 70 transitions. [2024-10-14 19:59:28,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 396 flow [2024-10-14 19:59:28,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 332 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-10-14 19:59:28,736 INFO L231 Difference]: Finished difference. Result has 51 places, 59 transitions, 240 flow [2024-10-14 19:59:28,736 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=240, PETRI_PLACES=51, PETRI_TRANSITIONS=59} [2024-10-14 19:59:28,737 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-10-14 19:59:28,737 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 59 transitions, 240 flow [2024-10-14 19:59:28,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 19:59:28,737 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:28,737 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:59:28,743 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 (5)] Forceful destruction successful, exit code 0 [2024-10-14 19:59:28,940 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 19:59:28,940 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:59:28,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:28,941 INFO L85 PathProgramCache]: Analyzing trace with hash -887109015, now seen corresponding path program 1 times [2024-10-14 19:59:28,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:28,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1367164200] [2024-10-14 19:59:28,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:28,942 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 19:59:28,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:28,947 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 19:59:28,948 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 19:59:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:29,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 19:59:29,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:29,053 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 19:59:29,054 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:59:29,054 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:29,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1367164200] [2024-10-14 19:59:29,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1367164200] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:59:29,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:59:29,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:59:29,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627029778] [2024-10-14 19:59:29,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:59:29,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:59:29,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:29,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:59:29,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:59:29,077 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-10-14 19:59:29,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 59 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 19:59:29,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:29,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-10-14 19:59:29,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:29,317 INFO L124 PetriNetUnfolderBase]: 311/557 cut-off events. [2024-10-14 19:59:29,317 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-10-14 19:59:29,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 557 events. 311/557 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 2649 event pairs, 194 based on Foata normal form. 15/405 useless extension candidates. Maximal degree in co-relation 1096. Up to 453 conditions per place. [2024-10-14 19:59:29,320 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 56 selfloop transitions, 7 changer transitions 1/71 dead transitions. [2024-10-14 19:59:29,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 396 flow [2024-10-14 19:59:29,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:59:29,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:59:29,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-10-14 19:59:29,322 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5397727272727273 [2024-10-14 19:59:29,322 INFO L175 Difference]: Start difference. First operand has 51 places, 59 transitions, 240 flow. Second operand 4 states and 95 transitions. [2024-10-14 19:59:29,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 396 flow [2024-10-14 19:59:29,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 71 transitions, 389 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:59:29,325 INFO L231 Difference]: Finished difference. Result has 53 places, 59 transitions, 256 flow [2024-10-14 19:59:29,325 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=256, PETRI_PLACES=53, PETRI_TRANSITIONS=59} [2024-10-14 19:59:29,326 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-10-14 19:59:29,326 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 59 transitions, 256 flow [2024-10-14 19:59:29,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 19:59:29,327 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:29,327 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:59:29,331 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 19:59:29,527 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 19:59:29,528 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:59:29,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:29,528 INFO L85 PathProgramCache]: Analyzing trace with hash -108473956, now seen corresponding path program 1 times [2024-10-14 19:59:29,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:29,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170694003] [2024-10-14 19:59:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:29,529 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 19:59:29,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:29,532 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 19:59:29,533 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 19:59:29,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:29,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-14 19:59:29,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:29,613 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 19:59:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:59:29,798 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:59:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:59:30,343 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:30,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170694003] [2024-10-14 19:59:30,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170694003] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:59:30,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:59:30,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-10-14 19:59:30,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303477542] [2024-10-14 19:59:30,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:59:30,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 19:59:30,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:30,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 19:59:30,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-14 19:59:30,637 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-14 19:59:30,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 59 transitions, 256 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 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 19:59:30,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:30,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-14 19:59:30,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:32,140 INFO L124 PetriNetUnfolderBase]: 731/1277 cut-off events. [2024-10-14 19:59:32,141 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2024-10-14 19:59:32,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2743 conditions, 1277 events. 731/1277 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6911 event pairs, 452 based on Foata normal form. 0/928 useless extension candidates. Maximal degree in co-relation 2534. Up to 438 conditions per place. [2024-10-14 19:59:32,151 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 78 selfloop transitions, 25 changer transitions 1/109 dead transitions. [2024-10-14 19:59:32,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 109 transitions, 584 flow [2024-10-14 19:59:32,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 19:59:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 19:59:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-10-14 19:59:32,154 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-10-14 19:59:32,154 INFO L175 Difference]: Start difference. First operand has 53 places, 59 transitions, 256 flow. Second operand 9 states and 185 transitions. [2024-10-14 19:59:32,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 109 transitions, 584 flow [2024-10-14 19:59:32,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 109 transitions, 578 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:59:32,162 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 311 flow [2024-10-14 19:59:32,163 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=311, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-10-14 19:59:32,164 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-10-14 19:59:32,164 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 311 flow [2024-10-14 19:59:32,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 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 19:59:32,164 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:32,165 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:59:32,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-14 19:59:32,365 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 19:59:32,365 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:59:32,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:32,366 INFO L85 PathProgramCache]: Analyzing trace with hash -2120546993, now seen corresponding path program 1 times [2024-10-14 19:59:32,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:32,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787200675] [2024-10-14 19:59:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:32,367 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 19:59:32,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:32,368 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 19:59:32,368 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 19:59:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:32,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 19:59:32,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:32,479 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 19:59:32,480 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:59:32,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:32,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787200675] [2024-10-14 19:59:32,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787200675] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:59:32,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:59:32,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:59:32,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474049970] [2024-10-14 19:59:32,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:59:32,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:59:32,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:32,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:59:32,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:59:32,501 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-10-14 19:59:32,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 311 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 19:59:32,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:32,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-10-14 19:59:32,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:32,819 INFO L124 PetriNetUnfolderBase]: 788/1473 cut-off events. [2024-10-14 19:59:32,819 INFO L125 PetriNetUnfolderBase]: For 461/461 co-relation queries the response was YES. [2024-10-14 19:59:32,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3316 conditions, 1473 events. 788/1473 cut-off events. For 461/461 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8742 event pairs, 508 based on Foata normal form. 34/1197 useless extension candidates. Maximal degree in co-relation 2633. Up to 1167 conditions per place. [2024-10-14 19:59:32,829 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 74 selfloop transitions, 3 changer transitions 1/85 dead transitions. [2024-10-14 19:59:32,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 85 transitions, 605 flow [2024-10-14 19:59:32,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:59:32,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:59:32,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-10-14 19:59:32,832 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-10-14 19:59:32,832 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 311 flow. Second operand 4 states and 99 transitions. [2024-10-14 19:59:32,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 85 transitions, 605 flow [2024-10-14 19:59:32,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 85 transitions, 596 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:59:32,837 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 323 flow [2024-10-14 19:59:32,837 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=323, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-10-14 19:59:32,838 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-10-14 19:59:32,838 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 323 flow [2024-10-14 19:59:32,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 19:59:32,839 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:32,839 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:59:32,843 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 19:59:33,041 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 19:59:33,042 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:59:33,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:33,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1905668654, now seen corresponding path program 1 times [2024-10-14 19:59:33,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:33,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729696204] [2024-10-14 19:59:33,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:33,043 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 19:59:33,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:33,046 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 19:59:33,047 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 19:59:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:33,120 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 19:59:33,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:33,129 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 19:59:33,170 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-14 19:59:33,171 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 19:59:33,232 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 19:59:33,233 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:59:33,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:33,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729696204] [2024-10-14 19:59:33,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729696204] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:59:33,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:59:33,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:59:33,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614399017] [2024-10-14 19:59:33,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:59:33,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:59:33,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:33,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:59:33,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:59:33,270 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-14 19:59:33,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 323 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 19:59:33,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:33,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-14 19:59:33,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:33,508 INFO L124 PetriNetUnfolderBase]: 597/1174 cut-off events. [2024-10-14 19:59:33,508 INFO L125 PetriNetUnfolderBase]: For 508/532 co-relation queries the response was YES. [2024-10-14 19:59:33,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2927 conditions, 1174 events. 597/1174 cut-off events. For 508/532 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6849 event pairs, 386 based on Foata normal form. 0/1013 useless extension candidates. Maximal degree in co-relation 2447. Up to 1005 conditions per place. [2024-10-14 19:59:33,516 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 39 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2024-10-14 19:59:33,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 57 transitions, 415 flow [2024-10-14 19:59:33,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:59:33,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:59:33,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-10-14 19:59:33,518 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35454545454545455 [2024-10-14 19:59:33,518 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 323 flow. Second operand 5 states and 78 transitions. [2024-10-14 19:59:33,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 57 transitions, 415 flow [2024-10-14 19:59:33,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 57 transitions, 403 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-14 19:59:33,522 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 325 flow [2024-10-14 19:59:33,522 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=325, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2024-10-14 19:59:33,523 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-10-14 19:59:33,523 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 325 flow [2024-10-14 19:59:33,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 19:59:33,523 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:33,523 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:59:33,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2024-10-14 19:59:33,724 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 19:59:33,724 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:59:33,725 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:33,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1905668655, now seen corresponding path program 1 times [2024-10-14 19:59:33,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:33,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133744598] [2024-10-14 19:59:33,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:33,725 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 19:59:33,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:33,727 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 19:59:33,728 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 19:59:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:33,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 19:59:33,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:33,807 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 19:59:33,815 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 19:59:33,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:59:33,986 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 19:59:34,003 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:59:34,003 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 19:59:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:59:34,133 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:59:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:59:35,033 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:35,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133744598] [2024-10-14 19:59:35,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133744598] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:59:35,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:59:35,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:59:35,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42957389] [2024-10-14 19:59:35,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:59:35,034 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:59:35,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:35,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:59:35,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:59:35,400 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-10-14 19:59:35,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 325 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 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 19:59:35,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:35,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-10-14 19:59:35,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:40,024 INFO L124 PetriNetUnfolderBase]: 1343/2582 cut-off events. [2024-10-14 19:59:40,024 INFO L125 PetriNetUnfolderBase]: For 1255/1297 co-relation queries the response was YES. [2024-10-14 19:59:40,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6369 conditions, 2582 events. 1343/2582 cut-off events. For 1255/1297 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16776 event pairs, 838 based on Foata normal form. 0/2384 useless extension candidates. Maximal degree in co-relation 3831. Up to 865 conditions per place. [2024-10-14 19:59:40,064 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 77 selfloop transitions, 46 changer transitions 0/128 dead transitions. [2024-10-14 19:59:40,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 128 transitions, 965 flow [2024-10-14 19:59:40,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 19:59:40,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 19:59:40,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 207 transitions. [2024-10-14 19:59:40,068 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.336038961038961 [2024-10-14 19:59:40,068 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 325 flow. Second operand 14 states and 207 transitions. [2024-10-14 19:59:40,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 128 transitions, 965 flow [2024-10-14 19:59:40,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 128 transitions, 936 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:59:40,076 INFO L231 Difference]: Finished difference. Result has 82 places, 83 transitions, 660 flow [2024-10-14 19:59:40,076 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=660, PETRI_PLACES=82, PETRI_TRANSITIONS=83} [2024-10-14 19:59:40,077 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-10-14 19:59:40,078 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 660 flow [2024-10-14 19:59:40,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 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 19:59:40,079 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:40,079 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-14 19:59:40,084 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 (10)] Forceful destruction successful, exit code 0 [2024-10-14 19:59:40,279 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 19:59:40,280 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 19:59:40,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:40,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2130184114, now seen corresponding path program 2 times [2024-10-14 19:59:40,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:40,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821267612] [2024-10-14 19:59:40,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:59:40,281 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 19:59:40,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:40,284 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 19:59:40,285 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 19:59:40,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:59:40,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:59:40,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 19:59:40,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:40,367 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 19:59:40,684 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 19:59:40,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:59:41,266 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 19:59:41,266 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:41,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821267612] [2024-10-14 19:59:41,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821267612] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:59:41,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:59:41,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:59:41,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683314407] [2024-10-14 19:59:41,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:59:41,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:59:41,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:41,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:59:41,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:59:41,681 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-14 19:59:41,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 660 flow. Second operand has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:41,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:41,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-14 19:59:41,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:45,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:59:50,573 INFO L124 PetriNetUnfolderBase]: 1373/2669 cut-off events. [2024-10-14 19:59:50,573 INFO L125 PetriNetUnfolderBase]: For 2079/2169 co-relation queries the response was YES. [2024-10-14 19:59:50,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7227 conditions, 2669 events. 1373/2669 cut-off events. For 2079/2169 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 17795 event pairs, 838 based on Foata normal form. 30/2585 useless extension candidates. Maximal degree in co-relation 6400. Up to 2272 conditions per place. [2024-10-14 19:59:50,586 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 31 selfloop transitions, 107 changer transitions 0/143 dead transitions. [2024-10-14 19:59:50,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 143 transitions, 1512 flow [2024-10-14 19:59:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 19:59:50,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-14 19:59:50,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 320 transitions. [2024-10-14 19:59:50,589 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3305785123966942 [2024-10-14 19:59:50,589 INFO L175 Difference]: Start difference. First operand has 82 places, 83 transitions, 660 flow. Second operand 22 states and 320 transitions. [2024-10-14 19:59:50,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 143 transitions, 1512 flow [2024-10-14 19:59:50,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 143 transitions, 1509 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:59:50,602 INFO L231 Difference]: Finished difference. Result has 108 places, 143 transitions, 1537 flow [2024-10-14 19:59:50,603 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1537, PETRI_PLACES=108, PETRI_TRANSITIONS=143} [2024-10-14 19:59:50,604 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-10-14 19:59:50,604 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 143 transitions, 1537 flow [2024-10-14 19:59:50,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:50,605 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:50,605 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:59:50,608 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 19:59:50,805 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 19:59:50,805 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:59:50,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:50,806 INFO L85 PathProgramCache]: Analyzing trace with hash 889004376, now seen corresponding path program 1 times [2024-10-14 19:59:50,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:50,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046764835] [2024-10-14 19:59:50,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:50,806 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 19:59:50,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:50,807 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 19:59:50,808 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 19:59:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:50,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:59:50,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:50,912 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 19:59:50,912 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:59:50,912 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:50,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046764835] [2024-10-14 19:59:50,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046764835] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:59:50,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:59:50,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:59:50,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041502287] [2024-10-14 19:59:50,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:59:50,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:59:50,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:50,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:59:50,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:59:50,918 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-10-14 19:59:50,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 143 transitions, 1537 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 19:59:50,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:50,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-10-14 19:59:50,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:51,421 INFO L124 PetriNetUnfolderBase]: 1854/3545 cut-off events. [2024-10-14 19:59:51,421 INFO L125 PetriNetUnfolderBase]: For 2843/2933 co-relation queries the response was YES. [2024-10-14 19:59:51,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9878 conditions, 3545 events. 1854/3545 cut-off events. For 2843/2933 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 24788 event pairs, 460 based on Foata normal form. 16/3459 useless extension candidates. Maximal degree in co-relation 9617. Up to 2112 conditions per place. [2024-10-14 19:59:51,439 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 144 selfloop transitions, 3 changer transitions 4/158 dead transitions. [2024-10-14 19:59:51,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 158 transitions, 1904 flow [2024-10-14 19:59:51,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:59:51,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:59:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-10-14 19:59:51,441 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-10-14 19:59:51,441 INFO L175 Difference]: Start difference. First operand has 108 places, 143 transitions, 1537 flow. Second operand 3 states and 78 transitions. [2024-10-14 19:59:51,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 158 transitions, 1904 flow [2024-10-14 19:59:51,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 158 transitions, 1624 flow, removed 87 selfloop flow, removed 9 redundant places. [2024-10-14 19:59:51,458 INFO L231 Difference]: Finished difference. Result has 102 places, 142 transitions, 1239 flow [2024-10-14 19:59:51,458 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1239, PETRI_PLACES=102, PETRI_TRANSITIONS=142} [2024-10-14 19:59:51,459 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-10-14 19:59:51,459 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 142 transitions, 1239 flow [2024-10-14 19:59:51,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 19:59:51,459 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:51,459 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:59:51,465 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 19:59:51,659 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 19:59:51,660 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:59:51,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:51,661 INFO L85 PathProgramCache]: Analyzing trace with hash 978231989, now seen corresponding path program 2 times [2024-10-14 19:59:51,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:51,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71739926] [2024-10-14 19:59:51,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:59:51,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:51,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:51,662 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 19:59:51,663 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 19:59:51,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 19:59:51,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:59:51,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 19:59:51,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:51,728 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 19:59:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 19:59:51,851 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:59:51,851 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:51,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71739926] [2024-10-14 19:59:51,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71739926] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:59:51,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:59:51,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:59:51,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439348649] [2024-10-14 19:59:51,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:59:51,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:59:51,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:51,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:59:51,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:59:51,879 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-10-14 19:59:51,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 142 transitions, 1239 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 19:59:51,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:51,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-10-14 19:59:51,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:52,322 INFO L124 PetriNetUnfolderBase]: 1575/3021 cut-off events. [2024-10-14 19:59:52,322 INFO L125 PetriNetUnfolderBase]: For 3125/3215 co-relation queries the response was YES. [2024-10-14 19:59:52,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8515 conditions, 3021 events. 1575/3021 cut-off events. For 3125/3215 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 20893 event pairs, 989 based on Foata normal form. 146/3072 useless extension candidates. Maximal degree in co-relation 8283. Up to 2608 conditions per place. [2024-10-14 19:59:52,343 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 110 selfloop transitions, 23 changer transitions 0/140 dead transitions. [2024-10-14 19:59:52,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 140 transitions, 1489 flow [2024-10-14 19:59:52,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:59:52,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:59:52,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-10-14 19:59:52,345 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-10-14 19:59:52,345 INFO L175 Difference]: Start difference. First operand has 102 places, 142 transitions, 1239 flow. Second operand 4 states and 74 transitions. [2024-10-14 19:59:52,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 140 transitions, 1489 flow [2024-10-14 19:59:52,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 140 transitions, 1482 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:59:52,357 INFO L231 Difference]: Finished difference. Result has 100 places, 140 transitions, 1262 flow [2024-10-14 19:59:52,357 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1262, PETRI_PLACES=100, PETRI_TRANSITIONS=140} [2024-10-14 19:59:52,357 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-10-14 19:59:52,357 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 140 transitions, 1262 flow [2024-10-14 19:59:52,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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 19:59:52,358 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:52,358 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:59:52,362 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 19:59:52,558 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 19:59:52,558 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:59:52,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:52,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1329786292, now seen corresponding path program 2 times [2024-10-14 19:59:52,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:52,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829170169] [2024-10-14 19:59:52,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:59:52,559 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 19:59:52,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:52,562 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 19:59:52,563 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 19:59:52,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 19:59:52,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:59:52,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 19:59:52,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:52,651 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 19:59:52,659 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 19:59:52,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:59:52,824 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 19:59:52,841 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:59:52,842 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 19:59:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 19:59:52,902 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:59:52,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:52,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829170169] [2024-10-14 19:59:52,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829170169] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:59:52,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:59:52,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:59:52,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706832165] [2024-10-14 19:59:52,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:59:52,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:59:52,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:52,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:59:52,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:59:52,925 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-14 19:59:52,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 140 transitions, 1262 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 19:59:52,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:52,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-14 19:59:52,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:53,253 INFO L124 PetriNetUnfolderBase]: 1345/2654 cut-off events. [2024-10-14 19:59:53,253 INFO L125 PetriNetUnfolderBase]: For 2177/2213 co-relation queries the response was YES. [2024-10-14 19:59:53,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7072 conditions, 2654 events. 1345/2654 cut-off events. For 2177/2213 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18037 event pairs, 828 based on Foata normal form. 132/2711 useless extension candidates. Maximal degree in co-relation 6837. Up to 2346 conditions per place. [2024-10-14 19:59:53,264 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 118 selfloop transitions, 12 changer transitions 1/138 dead transitions. [2024-10-14 19:59:53,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 138 transitions, 1508 flow [2024-10-14 19:59:53,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:59:53,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:59:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-10-14 19:59:53,265 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-10-14 19:59:53,265 INFO L175 Difference]: Start difference. First operand has 100 places, 140 transitions, 1262 flow. Second operand 4 states and 64 transitions. [2024-10-14 19:59:53,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 138 transitions, 1508 flow [2024-10-14 19:59:53,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 138 transitions, 1454 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:59:53,275 INFO L231 Difference]: Finished difference. Result has 98 places, 137 transitions, 1201 flow [2024-10-14 19:59:53,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1201, PETRI_PLACES=98, PETRI_TRANSITIONS=137} [2024-10-14 19:59:53,276 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-10-14 19:59:53,276 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 137 transitions, 1201 flow [2024-10-14 19:59:53,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 19:59:53,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:53,277 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:59:53,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2024-10-14 19:59:53,480 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 19:59:53,480 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:59:53,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:53,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1150380035, now seen corresponding path program 1 times [2024-10-14 19:59:53,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:53,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233439109] [2024-10-14 19:59:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:53,481 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 19:59:53,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:53,482 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 19:59:53,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-10-14 19:59:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:53,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:59:53,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:59:53,591 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:59:53,592 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:53,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233439109] [2024-10-14 19:59:53,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233439109] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:59:53,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:59:53,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:59:53,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441906228] [2024-10-14 19:59:53,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:59:53,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:59:53,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:53,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:59:53,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:59:53,593 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-10-14 19:59:53,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 137 transitions, 1201 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 19:59:53,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:53,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-10-14 19:59:53,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:53,857 INFO L124 PetriNetUnfolderBase]: 995/2061 cut-off events. [2024-10-14 19:59:53,857 INFO L125 PetriNetUnfolderBase]: For 1195/1195 co-relation queries the response was YES. [2024-10-14 19:59:53,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5560 conditions, 2061 events. 995/2061 cut-off events. For 1195/1195 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13455 event pairs, 226 based on Foata normal form. 54/2055 useless extension candidates. Maximal degree in co-relation 5328. Up to 1279 conditions per place. [2024-10-14 19:59:53,867 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 133 selfloop transitions, 2 changer transitions 2/144 dead transitions. [2024-10-14 19:59:53,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 144 transitions, 1495 flow [2024-10-14 19:59:53,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:59:53,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:59:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-10-14 19:59:53,869 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-14 19:59:53,869 INFO L175 Difference]: Start difference. First operand has 98 places, 137 transitions, 1201 flow. Second operand 3 states and 66 transitions. [2024-10-14 19:59:53,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 144 transitions, 1495 flow [2024-10-14 19:59:53,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 144 transitions, 1478 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 19:59:53,877 INFO L231 Difference]: Finished difference. Result has 95 places, 138 transitions, 1198 flow [2024-10-14 19:59:53,878 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1198, PETRI_PLACES=95, PETRI_TRANSITIONS=138} [2024-10-14 19:59:53,878 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-10-14 19:59:53,878 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 138 transitions, 1198 flow [2024-10-14 19:59:53,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 19:59:53,879 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:53,879 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:59:53,884 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 (15)] Forceful destruction successful, exit code 0 [2024-10-14 19:59:54,079 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 19:59:54,080 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:59:54,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:54,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1076893425, now seen corresponding path program 1 times [2024-10-14 19:59:54,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:54,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337113615] [2024-10-14 19:59:54,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:54,081 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 19:59:54,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:54,084 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 19:59:54,085 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 19:59:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:54,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:59:54,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:59:54,191 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:59:54,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:54,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337113615] [2024-10-14 19:59:54,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337113615] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:59:54,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:59:54,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:59:54,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585881140] [2024-10-14 19:59:54,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:59:54,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:59:54,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:54,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:59:54,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:59:54,193 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-10-14 19:59:54,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 138 transitions, 1198 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 19:59:54,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:54,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-10-14 19:59:54,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:54,465 INFO L124 PetriNetUnfolderBase]: 770/1679 cut-off events. [2024-10-14 19:59:54,465 INFO L125 PetriNetUnfolderBase]: For 1298/1298 co-relation queries the response was YES. [2024-10-14 19:59:54,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4887 conditions, 1679 events. 770/1679 cut-off events. For 1298/1298 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 10212 event pairs, 268 based on Foata normal form. 45/1673 useless extension candidates. Maximal degree in co-relation 4656. Up to 1024 conditions per place. [2024-10-14 19:59:54,473 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 134 selfloop transitions, 2 changer transitions 4/147 dead transitions. [2024-10-14 19:59:54,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 147 transitions, 1506 flow [2024-10-14 19:59:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:59:54,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:59:54,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-10-14 19:59:54,475 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-10-14 19:59:54,475 INFO L175 Difference]: Start difference. First operand has 95 places, 138 transitions, 1198 flow. Second operand 3 states and 68 transitions. [2024-10-14 19:59:54,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 147 transitions, 1506 flow [2024-10-14 19:59:54,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 147 transitions, 1503 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:59:54,485 INFO L231 Difference]: Finished difference. Result has 97 places, 139 transitions, 1210 flow [2024-10-14 19:59:54,485 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1210, PETRI_PLACES=97, PETRI_TRANSITIONS=139} [2024-10-14 19:59:54,485 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-10-14 19:59:54,485 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 139 transitions, 1210 flow [2024-10-14 19:59:54,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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 19:59:54,486 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:54,486 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-10-14 19:59:54,491 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 (16)] Ended with exit code 0 [2024-10-14 19:59:54,686 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 19:59:54,687 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-14 19:59:54,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:54,687 INFO L85 PathProgramCache]: Analyzing trace with hash -54366520, now seen corresponding path program 3 times [2024-10-14 19:59:54,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:54,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628525967] [2024-10-14 19:59:54,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 19:59:54,688 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 19:59:54,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:54,691 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 19:59:54,692 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 19:59:54,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-14 19:59:54,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:59:54,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 19:59:54,889 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:54,899 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 19:59:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:59:55,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:59:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:59:57,784 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:57,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628525967] [2024-10-14 19:59:57,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628525967] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:59:57,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:59:57,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-10-14 19:59:57,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388211550] [2024-10-14 19:59:57,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:59:57,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 19:59:57,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:57,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 19:59:57,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-10-14 19:59:58,708 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-14 19:59:58,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 139 transitions, 1210 flow. Second operand has 26 states, 26 states have (on average 11.76923076923077) internal successors, (306), 26 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 19:59:58,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:58,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-14 19:59:58,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:08,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:10,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:12,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:13,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:15,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:16,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:17,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:23,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:25,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:27,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:28,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:30,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:33,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:34,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:37,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:38,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:39,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:40,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:43,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:45,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 20:00:46,364 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []