./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-channel-sum.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-channel-sum.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 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:53:19,352 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:53:19,417 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:53:19,421 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:53:19,423 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:53:19,451 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:53:19,452 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:53:19,452 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:53:19,453 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:53:19,455 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:53:19,456 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:53:19,456 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:53:19,456 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:53:19,457 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:53:19,457 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:53:19,457 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:53:19,457 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:53:19,458 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:53:19,459 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:53:19,459 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:53:19,459 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:53:19,460 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:53:19,460 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:53:19,461 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:53:19,461 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:53:19,462 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:53:19,462 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:53:19,462 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:53:19,462 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:53:19,462 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:53:19,463 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:53:19,463 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:53:19,463 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:53:19,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:53:19,464 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:53:19,464 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:53:19,464 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:53:19,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:53:19,465 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:53:19,465 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:53:19,466 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:53:19,466 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:53:19,466 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 [2024-10-14 19:53:19,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:53:19,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:53:19,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:53:19,695 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:53:19,696 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:53:19,696 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-10-14 19:53:21,086 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:53:21,251 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:53:21,252 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-10-14 19:53:21,258 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/179ed1bef/75f195c24fc44f469a49fc8a303d38d8/FLAG3927fb727 [2024-10-14 19:53:21,268 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/179ed1bef/75f195c24fc44f469a49fc8a303d38d8 [2024-10-14 19:53:21,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:53:21,271 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:53:21,272 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:53:21,273 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:53:21,277 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:53:21,278 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:53:21" (1/1) ... [2024-10-14 19:53:21,278 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@897e296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:21, skipping insertion in model container [2024-10-14 19:53:21,279 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:53:21" (1/1) ... [2024-10-14 19:53:21,296 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:53:21,422 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:53:21,430 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 19:53:21,430 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@40f2a950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:21, skipping insertion in model container [2024-10-14 19:53:21,430 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:53:21,431 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-14 19:53:21,436 INFO L158 Benchmark]: Toolchain (without parser) took 164.78ms. Allocated memory is still 161.5MB. Free memory was 88.5MB in the beginning and 77.7MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-14 19:53:21,437 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 161.5MB. Free memory was 111.4MB in the beginning and 111.2MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 19:53:21,437 INFO L158 Benchmark]: CACSL2BoogieTranslator took 158.19ms. Allocated memory is still 161.5MB. Free memory was 88.4MB in the beginning and 77.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-14 19:53:21,438 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 161.5MB. Free memory was 111.4MB in the beginning and 111.2MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 158.19ms. Allocated memory is still 161.5MB. Free memory was 88.4MB in the beginning and 77.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: 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-channel-sum.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 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:53:23,403 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:53:23,463 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-14 19:53:23,470 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:53:23,474 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:53:23,497 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:53:23,498 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:53:23,501 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:53:23,501 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:53:23,501 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:53:23,502 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:53:23,502 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:53:23,502 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:53:23,503 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:53:23,504 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:53:23,504 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:53:23,505 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:53:23,505 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:53:23,505 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:53:23,505 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:53:23,505 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:53:23,508 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:53:23,509 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:53:23,509 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:53:23,509 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:53:23,509 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-14 19:53:23,509 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:53:23,509 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-14 19:53:23,510 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:53:23,510 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:53:23,510 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:53:23,510 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:53:23,510 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:53:23,510 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:53:23,510 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:53:23,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:53:23,511 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:53:23,511 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:53:23,511 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-14 19:53:23,511 INFO L153 SettingsManager]: * Command for external solver=cvc5 --incremental --print-success --lang smt [2024-10-14 19:53:23,511 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:53:23,512 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:53:23,512 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:53:23,513 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:53:23,513 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-14 19:53:23,513 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 [2024-10-14 19:53:23,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:53:23,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:53:23,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:53:23,806 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:53:23,807 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:53:23,808 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-10-14 19:53:25,221 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:53:25,379 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:53:25,381 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-10-14 19:53:25,390 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2630c9c2b/8c3bd29279a04c449689a1e39e47f058/FLAG72a1fad24 [2024-10-14 19:53:25,401 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2630c9c2b/8c3bd29279a04c449689a1e39e47f058 [2024-10-14 19:53:25,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:53:25,404 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:53:25,406 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:53:25,407 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:53:25,410 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:53:25,411 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:53:25" (1/1) ... [2024-10-14 19:53:25,413 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@225f3c58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:25, skipping insertion in model container [2024-10-14 19:53:25,413 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:53:25" (1/1) ... [2024-10-14 19:53:25,432 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:53:25,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:53:25,605 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-14 19:53:25,607 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:53:25,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:53:25,636 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:53:25,659 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:53:25,677 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:53:25,678 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:25 WrapperNode [2024-10-14 19:53:25,678 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:53:25,679 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:53:25,679 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:53:25,679 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:53:25,684 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:25" (1/1) ... [2024-10-14 19:53:25,697 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:25" (1/1) ... [2024-10-14 19:53:25,723 INFO L138 Inliner]: procedures = 25, calls = 36, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 145 [2024-10-14 19:53:25,725 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:53:25,726 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:53:25,726 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:53:25,726 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:53:25,735 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:25" (1/1) ... [2024-10-14 19:53:25,735 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:25" (1/1) ... [2024-10-14 19:53:25,738 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:25" (1/1) ... [2024-10-14 19:53:25,758 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-14 19:53:25,759 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:25" (1/1) ... [2024-10-14 19:53:25,759 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:25" (1/1) ... [2024-10-14 19:53:25,764 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:25" (1/1) ... [2024-10-14 19:53:25,771 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:25" (1/1) ... [2024-10-14 19:53:25,775 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:25" (1/1) ... [2024-10-14 19:53:25,776 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:25" (1/1) ... [2024-10-14 19:53:25,778 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:53:25,781 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:53:25,781 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:53:25,782 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:53:25,783 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:25" (1/1) ... [2024-10-14 19:53:25,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:53:25,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:53:25,813 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 19:53:25,816 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 19:53:25,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:53:25,849 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 19:53:25,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 19:53:25,849 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 19:53:25,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 19:53:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-14 19:53:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-14 19:53:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 19:53:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 19:53:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 19:53:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-14 19:53:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-14 19:53:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:53:25,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:53:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-14 19:53:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-14 19:53:25,864 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 19:53:25,979 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:53:25,981 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:53:26,249 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:53:26,249 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:53:26,440 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:53:26,443 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-14 19:53:26,444 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:53:26 BoogieIcfgContainer [2024-10-14 19:53:26,444 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:53:26,445 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:53:26,445 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:53:26,450 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:53:26,450 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:53:25" (1/3) ... [2024-10-14 19:53:26,450 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ccc9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:53:26, skipping insertion in model container [2024-10-14 19:53:26,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:25" (2/3) ... [2024-10-14 19:53:26,451 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27ccc9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:53:26, skipping insertion in model container [2024-10-14 19:53:26,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:53:26" (3/3) ... [2024-10-14 19:53:26,452 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2024-10-14 19:53:26,466 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:53:26,467 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-10-14 19:53:26,467 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:53:26,525 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 19:53:26,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 45 transitions, 104 flow [2024-10-14 19:53:26,574 INFO L124 PetriNetUnfolderBase]: 5/43 cut-off events. [2024-10-14 19:53:26,576 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 19:53:26,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 43 events. 5/43 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 81 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-10-14 19:53:26,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 45 transitions, 104 flow [2024-10-14 19:53:26,584 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 42 transitions, 96 flow [2024-10-14 19:53:26,598 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:53:26,603 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;@4a60f388, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:53:26,603 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-10-14 19:53:26,607 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:53:26,607 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-14 19:53:26,607 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:53:26,607 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:26,608 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:53:26,608 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:53:26,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:26,612 INFO L85 PathProgramCache]: Analyzing trace with hash 446108, now seen corresponding path program 1 times [2024-10-14 19:53:26,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:26,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717376090] [2024-10-14 19:53:26,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:26,622 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 19:53:26,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:26,625 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 19:53:26,626 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 19:53:26,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:26,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:53:26,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:26,748 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 19:53:26,765 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 19:53:26,765 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:26,765 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:26,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717376090] [2024-10-14 19:53:26,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717376090] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:26,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:26,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:53:26,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599343669] [2024-10-14 19:53:26,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:26,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:53:26,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:26,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:53:26,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:53:26,821 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-14 19:53:26,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 19:53:26,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:26,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-14 19:53:26,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:26,952 INFO L124 PetriNetUnfolderBase]: 230/398 cut-off events. [2024-10-14 19:53:26,952 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-10-14 19:53:26,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 398 events. 230/398 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1737 event pairs, 152 based on Foata normal form. 1/277 useless extension candidates. Maximal degree in co-relation 692. Up to 357 conditions per place. [2024-10-14 19:53:26,964 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 26 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-10-14 19:53:26,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 38 transitions, 144 flow [2024-10-14 19:53:26,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:53:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:53:26,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-10-14 19:53:26,976 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-10-14 19:53:26,977 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 96 flow. Second operand 3 states and 70 transitions. [2024-10-14 19:53:26,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 38 transitions, 144 flow [2024-10-14 19:53:26,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 136 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 19:53:26,981 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 84 flow [2024-10-14 19:53:26,982 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2024-10-14 19:53:26,984 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2024-10-14 19:53:26,984 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 84 flow [2024-10-14 19:53:26,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 19:53:26,985 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:26,985 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:53:26,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2024-10-14 19:53:27,187 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 19:53:27,189 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:53:27,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:27,193 INFO L85 PathProgramCache]: Analyzing trace with hash 446109, now seen corresponding path program 1 times [2024-10-14 19:53:27,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:27,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127305430] [2024-10-14 19:53:27,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:27,193 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 19:53:27,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:27,195 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 19:53:27,197 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 19:53:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:27,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:53:27,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:27,257 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 19:53:27,339 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 19:53:27,339 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:27,339 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:27,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127305430] [2024-10-14 19:53:27,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127305430] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:27,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:27,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:53:27,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058159593] [2024-10-14 19:53:27,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:27,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:53:27,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:27,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:53:27,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:53:27,375 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-14 19:53:27,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 84 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 19:53:27,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:27,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-14 19:53:27,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:27,550 INFO L124 PetriNetUnfolderBase]: 231/401 cut-off events. [2024-10-14 19:53:27,550 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-10-14 19:53:27,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 775 conditions, 401 events. 231/401 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1750 event pairs, 152 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 753. Up to 362 conditions per place. [2024-10-14 19:53:27,552 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 28 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-10-14 19:53:27,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 41 transitions, 156 flow [2024-10-14 19:53:27,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:53:27,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:53:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-10-14 19:53:27,553 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-10-14 19:53:27,554 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 84 flow. Second operand 4 states and 85 transitions. [2024-10-14 19:53:27,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 41 transitions, 156 flow [2024-10-14 19:53:27,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 150 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:53:27,555 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 107 flow [2024-10-14 19:53:27,555 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2024-10-14 19:53:27,556 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -2 predicate places. [2024-10-14 19:53:27,556 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 107 flow [2024-10-14 19:53:27,556 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 19:53:27,556 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:27,556 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-14 19:53:27,560 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 (3)] Forceful destruction successful, exit code 0 [2024-10-14 19:53:27,758 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 19:53:27,759 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:53:27,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:27,759 INFO L85 PathProgramCache]: Analyzing trace with hash 428724408, now seen corresponding path program 1 times [2024-10-14 19:53:27,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:27,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861125550] [2024-10-14 19:53:27,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:27,760 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 19:53:27,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:27,762 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 19:53:27,763 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 19:53:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:27,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 19:53:27,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:27,808 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 19:53:27,924 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 19:53:27,924 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:53:28,100 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 19:53:28,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:28,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861125550] [2024-10-14 19:53:28,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861125550] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:53:28,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:53:28,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:53:28,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478986814] [2024-10-14 19:53:28,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:53:28,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:53:28,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:28,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:53:28,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:53:28,184 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-14 19:53:28,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 107 flow. Second operand has 10 states, 10 states have (on average 14.0) internal successors, (140), 10 states have internal predecessors, (140), 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 19:53:28,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:28,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-14 19:53:28,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:28,562 INFO L124 PetriNetUnfolderBase]: 234/410 cut-off events. [2024-10-14 19:53:28,562 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-10-14 19:53:28,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 410 events. 234/410 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1804 event pairs, 152 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 760. Up to 365 conditions per place. [2024-10-14 19:53:28,564 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 28 selfloop transitions, 13 changer transitions 0/50 dead transitions. [2024-10-14 19:53:28,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 50 transitions, 225 flow [2024-10-14 19:53:28,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 19:53:28,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 19:53:28,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-10-14 19:53:28,566 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2024-10-14 19:53:28,567 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 107 flow. Second operand 10 states and 174 transitions. [2024-10-14 19:53:28,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 50 transitions, 225 flow [2024-10-14 19:53:28,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:53:28,568 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 184 flow [2024-10-14 19:53:28,568 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=184, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-10-14 19:53:28,569 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-10-14 19:53:28,569 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 184 flow [2024-10-14 19:53:28,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.0) internal successors, (140), 10 states have internal predecessors, (140), 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 19:53:28,569 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:28,569 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:28,572 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 19:53:28,770 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 19:53:28,771 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:53:28,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:28,771 INFO L85 PathProgramCache]: Analyzing trace with hash -254564576, now seen corresponding path program 1 times [2024-10-14 19:53:28,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:28,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550715208] [2024-10-14 19:53:28,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:28,773 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 19:53:28,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:28,775 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 19:53:28,776 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 19:53:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:28,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:53:28,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:28,842 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 19:53:28,842 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:28,842 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:28,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550715208] [2024-10-14 19:53:28,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550715208] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:28,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:28,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:53:28,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946882935] [2024-10-14 19:53:28,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:28,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:53:28,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:28,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:53:28,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:53:28,853 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-10-14 19:53:28,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 184 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 19:53:28,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:28,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-10-14 19:53:28,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:29,035 INFO L124 PetriNetUnfolderBase]: 362/679 cut-off events. [2024-10-14 19:53:29,035 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-10-14 19:53:29,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1361 conditions, 679 events. 362/679 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3000 event pairs, 78 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 1327. Up to 253 conditions per place. [2024-10-14 19:53:29,039 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 86 selfloop transitions, 7 changer transitions 0/101 dead transitions. [2024-10-14 19:53:29,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 101 transitions, 475 flow [2024-10-14 19:53:29,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:53:29,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:53:29,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-10-14 19:53:29,040 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6355555555555555 [2024-10-14 19:53:29,040 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 184 flow. Second operand 5 states and 143 transitions. [2024-10-14 19:53:29,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 101 transitions, 475 flow [2024-10-14 19:53:29,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 101 transitions, 445 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-10-14 19:53:29,043 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 210 flow [2024-10-14 19:53:29,043 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-10-14 19:53:29,043 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-10-14 19:53:29,044 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 210 flow [2024-10-14 19:53:29,044 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 19:53:29,044 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:29,044 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:29,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-14 19:53:29,246 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 19:53:29,247 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:53:29,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:29,247 INFO L85 PathProgramCache]: Analyzing trace with hash -3896494, now seen corresponding path program 1 times [2024-10-14 19:53:29,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:29,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67908780] [2024-10-14 19:53:29,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:29,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:29,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:29,251 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 19:53:29,252 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 19:53:29,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:29,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 19:53:29,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:29,300 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 19:53:29,327 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 19:53:29,328 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:29,328 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:29,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67908780] [2024-10-14 19:53:29,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67908780] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:29,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:29,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:53:29,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104662657] [2024-10-14 19:53:29,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:29,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:53:29,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:29,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:53:29,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:53:29,342 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-10-14 19:53:29,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 19:53:29,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:29,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-10-14 19:53:29,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:29,432 INFO L124 PetriNetUnfolderBase]: 265/523 cut-off events. [2024-10-14 19:53:29,432 INFO L125 PetriNetUnfolderBase]: For 392/417 co-relation queries the response was YES. [2024-10-14 19:53:29,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1291 conditions, 523 events. 265/523 cut-off events. For 392/417 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2371 event pairs, 169 based on Foata normal form. 25/480 useless extension candidates. Maximal degree in co-relation 1258. Up to 436 conditions per place. [2024-10-14 19:53:29,434 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 37 selfloop transitions, 6 changer transitions 0/53 dead transitions. [2024-10-14 19:53:29,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 290 flow [2024-10-14 19:53:29,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:53:29,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:53:29,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-10-14 19:53:29,436 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-10-14 19:53:29,436 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 210 flow. Second operand 4 states and 77 transitions. [2024-10-14 19:53:29,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 290 flow [2024-10-14 19:53:29,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 53 transitions, 290 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:53:29,439 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 216 flow [2024-10-14 19:53:29,439 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-10-14 19:53:29,439 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-10-14 19:53:29,439 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 216 flow [2024-10-14 19:53:29,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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 19:53:29,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:29,440 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-14 19:53:29,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2024-10-14 19:53:29,641 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 19:53:29,642 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:53:29,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:29,642 INFO L85 PathProgramCache]: Analyzing trace with hash 34928265, now seen corresponding path program 2 times [2024-10-14 19:53:29,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:29,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197871667] [2024-10-14 19:53:29,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:53:29,643 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 19:53:29,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:29,644 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 19:53:29,645 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 19:53:29,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:53:29,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:53:29,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 19:53:29,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:29,765 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 19:53:30,104 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 19:53:30,104 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:53:30,544 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 19:53:30,544 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:30,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197871667] [2024-10-14 19:53:30,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197871667] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:53:30,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:53:30,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:53:30,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604121533] [2024-10-14 19:53:30,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:53:30,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:53:30,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:30,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:53:30,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:53:30,749 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-14 19:53:30,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 216 flow. Second operand has 14 states, 14 states have (on average 14.571428571428571) internal successors, (204), 14 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:30,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:30,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-14 19:53:30,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:32,727 INFO L124 PetriNetUnfolderBase]: 271/541 cut-off events. [2024-10-14 19:53:32,727 INFO L125 PetriNetUnfolderBase]: For 428/453 co-relation queries the response was YES. [2024-10-14 19:53:32,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365 conditions, 541 events. 271/541 cut-off events. For 428/453 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2499 event pairs, 169 based on Foata normal form. 31/505 useless extension candidates. Maximal degree in co-relation 1263. Up to 447 conditions per place. [2024-10-14 19:53:32,730 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 31 selfloop transitions, 31 changer transitions 0/71 dead transitions. [2024-10-14 19:53:32,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 71 transitions, 436 flow [2024-10-14 19:53:32,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 19:53:32,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-14 19:53:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 349 transitions. [2024-10-14 19:53:32,732 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3525252525252525 [2024-10-14 19:53:32,732 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 216 flow. Second operand 22 states and 349 transitions. [2024-10-14 19:53:32,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 71 transitions, 436 flow [2024-10-14 19:53:32,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 71 transitions, 423 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:53:32,735 INFO L231 Difference]: Finished difference. Result has 83 places, 71 transitions, 391 flow [2024-10-14 19:53:32,735 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=391, PETRI_PLACES=83, PETRI_TRANSITIONS=71} [2024-10-14 19:53:32,736 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-10-14 19:53:32,736 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 71 transitions, 391 flow [2024-10-14 19:53:32,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.571428571428571) internal successors, (204), 14 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:32,737 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:32,737 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:32,742 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 19:53:32,940 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 19:53:32,941 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:53:32,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:32,941 INFO L85 PathProgramCache]: Analyzing trace with hash -3896493, now seen corresponding path program 1 times [2024-10-14 19:53:32,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:32,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157131140] [2024-10-14 19:53:32,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:32,942 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 19:53:32,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:32,943 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 19:53:32,945 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 19:53:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:33,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 19:53:33,001 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:33,040 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 19:53:33,040 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:33,041 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:33,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157131140] [2024-10-14 19:53:33,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157131140] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:33,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:33,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:53:33,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708949687] [2024-10-14 19:53:33,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:33,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:53:33,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:33,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:53:33,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:53:33,049 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-10-14 19:53:33,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 71 transitions, 391 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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 19:53:33,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:33,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-10-14 19:53:33,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:33,154 INFO L124 PetriNetUnfolderBase]: 298/608 cut-off events. [2024-10-14 19:53:33,154 INFO L125 PetriNetUnfolderBase]: For 474/511 co-relation queries the response was YES. [2024-10-14 19:53:33,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1565 conditions, 608 events. 298/608 cut-off events. For 474/511 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2900 event pairs, 197 based on Foata normal form. 42/576 useless extension candidates. Maximal degree in co-relation 1512. Up to 463 conditions per place. [2024-10-14 19:53:33,157 INFO L140 encePairwiseOnDemand]: 41/45 looper letters, 70 selfloop transitions, 3 changer transitions 1/84 dead transitions. [2024-10-14 19:53:33,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 84 transitions, 571 flow [2024-10-14 19:53:33,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:53:33,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:53:33,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-10-14 19:53:33,159 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-10-14 19:53:33,159 INFO L175 Difference]: Start difference. First operand has 83 places, 71 transitions, 391 flow. Second operand 4 states and 99 transitions. [2024-10-14 19:53:33,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 84 transitions, 571 flow [2024-10-14 19:53:33,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 84 transitions, 491 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-10-14 19:53:33,161 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 320 flow [2024-10-14 19:53:33,162 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=78, PETRI_TRANSITIONS=71} [2024-10-14 19:53:33,162 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-10-14 19:53:33,162 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 320 flow [2024-10-14 19:53:33,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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 19:53:33,163 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:33,163 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:33,168 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 19:53:33,363 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 19:53:33,364 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:53:33,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:33,364 INFO L85 PathProgramCache]: Analyzing trace with hash -832486802, now seen corresponding path program 1 times [2024-10-14 19:53:33,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:33,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262956198] [2024-10-14 19:53:33,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:33,365 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 19:53:33,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:33,367 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 19:53:33,368 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 (9)] Waiting until timeout for monitored process [2024-10-14 19:53:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:33,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 19:53:33,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:33,451 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 19:53:33,693 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 19:53:33,693 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:53:34,250 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 19:53:34,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:34,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262956198] [2024-10-14 19:53:34,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262956198] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:53:34,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:53:34,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-14 19:53:34,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110330299] [2024-10-14 19:53:34,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:53:34,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 19:53:34,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:34,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 19:53:34,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-14 19:53:34,641 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-14 19:53:34,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 320 flow. Second operand has 12 states, 12 states have (on average 15.0) internal successors, (180), 12 states have internal predecessors, (180), 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 19:53:34,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:34,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-14 19:53:34,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:35,961 INFO L124 PetriNetUnfolderBase]: 724/1431 cut-off events. [2024-10-14 19:53:35,961 INFO L125 PetriNetUnfolderBase]: For 1096/1177 co-relation queries the response was YES. [2024-10-14 19:53:35,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3593 conditions, 1431 events. 724/1431 cut-off events. For 1096/1177 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8025 event pairs, 331 based on Foata normal form. 81/1365 useless extension candidates. Maximal degree in co-relation 3544. Up to 369 conditions per place. [2024-10-14 19:53:35,967 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 96 selfloop transitions, 46 changer transitions 1/152 dead transitions. [2024-10-14 19:53:35,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 152 transitions, 887 flow [2024-10-14 19:53:35,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 19:53:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-14 19:53:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 279 transitions. [2024-10-14 19:53:35,969 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2024-10-14 19:53:35,969 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 320 flow. Second operand 13 states and 279 transitions. [2024-10-14 19:53:35,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 152 transitions, 887 flow [2024-10-14 19:53:35,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 152 transitions, 882 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:53:35,972 INFO L231 Difference]: Finished difference. Result has 91 places, 87 transitions, 543 flow [2024-10-14 19:53:35,973 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=543, PETRI_PLACES=91, PETRI_TRANSITIONS=87} [2024-10-14 19:53:35,973 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-10-14 19:53:35,973 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 87 transitions, 543 flow [2024-10-14 19:53:35,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.0) internal successors, (180), 12 states have internal predecessors, (180), 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 19:53:35,974 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:35,974 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:35,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2024-10-14 19:53:36,176 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 19:53:36,176 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:53:36,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:36,177 INFO L85 PathProgramCache]: Analyzing trace with hash -575431444, now seen corresponding path program 1 times [2024-10-14 19:53:36,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:36,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706709800] [2024-10-14 19:53:36,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:36,177 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 19:53:36,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:36,179 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 19:53:36,179 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 19:53:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:36,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:53:36,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:36,245 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 19:53:36,245 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:36,245 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:36,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706709800] [2024-10-14 19:53:36,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706709800] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:36,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:36,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:53:36,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017214961] [2024-10-14 19:53:36,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:36,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:53:36,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:36,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:53:36,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:53:36,247 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-10-14 19:53:36,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 87 transitions, 543 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 19:53:36,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:36,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-10-14 19:53:36,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:36,416 INFO L124 PetriNetUnfolderBase]: 875/1782 cut-off events. [2024-10-14 19:53:36,416 INFO L125 PetriNetUnfolderBase]: For 1988/2066 co-relation queries the response was YES. [2024-10-14 19:53:36,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4925 conditions, 1782 events. 875/1782 cut-off events. For 1988/2066 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 10791 event pairs, 395 based on Foata normal form. 85/1741 useless extension candidates. Maximal degree in co-relation 4869. Up to 1000 conditions per place. [2024-10-14 19:53:36,423 INFO L140 encePairwiseOnDemand]: 42/45 looper letters, 94 selfloop transitions, 2 changer transitions 6/112 dead transitions. [2024-10-14 19:53:36,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 112 transitions, 881 flow [2024-10-14 19:53:36,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:53:36,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:53:36,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-10-14 19:53:36,424 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-10-14 19:53:36,424 INFO L175 Difference]: Start difference. First operand has 91 places, 87 transitions, 543 flow. Second operand 3 states and 86 transitions. [2024-10-14 19:53:36,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 112 transitions, 881 flow [2024-10-14 19:53:36,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 112 transitions, 857 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-10-14 19:53:36,428 INFO L231 Difference]: Finished difference. Result has 89 places, 83 transitions, 494 flow [2024-10-14 19:53:36,428 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=494, PETRI_PLACES=89, PETRI_TRANSITIONS=83} [2024-10-14 19:53:36,429 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2024-10-14 19:53:36,429 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 494 flow [2024-10-14 19:53:36,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 19:53:36,429 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:36,429 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:36,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-10-14 19:53:36,634 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 19:53:36,634 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:53:36,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:36,634 INFO L85 PathProgramCache]: Analyzing trace with hash 2096280309, now seen corresponding path program 1 times [2024-10-14 19:53:36,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:36,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735342214] [2024-10-14 19:53:36,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:36,635 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 19:53:36,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:36,640 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 19:53:36,641 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 19:53:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:36,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 19:53:36,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:36,699 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 19:53:37,017 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 19:53:37,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:53:37,474 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 19:53:37,474 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:37,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735342214] [2024-10-14 19:53:37,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735342214] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:53:37,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:53:37,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-14 19:53:37,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799903321] [2024-10-14 19:53:37,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:53:37,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 19:53:37,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:37,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 19:53:37,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-14 19:53:37,773 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-10-14 19:53:37,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 83 transitions, 494 flow. Second operand has 12 states, 12 states have (on average 14.5) internal successors, (174), 12 states have internal predecessors, (174), 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 19:53:37,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:37,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-10-14 19:53:37,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:38,802 INFO L124 PetriNetUnfolderBase]: 982/1871 cut-off events. [2024-10-14 19:53:38,802 INFO L125 PetriNetUnfolderBase]: For 2095/2164 co-relation queries the response was YES. [2024-10-14 19:53:38,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5393 conditions, 1871 events. 982/1871 cut-off events. For 2095/2164 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11185 event pairs, 502 based on Foata normal form. 117/1835 useless extension candidates. Maximal degree in co-relation 5340. Up to 1082 conditions per place. [2024-10-14 19:53:38,809 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 98 selfloop transitions, 32 changer transitions 22/160 dead transitions. [2024-10-14 19:53:38,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 160 transitions, 1081 flow [2024-10-14 19:53:38,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 19:53:38,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-14 19:53:38,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 275 transitions. [2024-10-14 19:53:38,812 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4700854700854701 [2024-10-14 19:53:38,812 INFO L175 Difference]: Start difference. First operand has 89 places, 83 transitions, 494 flow. Second operand 13 states and 275 transitions. [2024-10-14 19:53:38,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 160 transitions, 1081 flow [2024-10-14 19:53:38,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 160 transitions, 1076 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:53:38,817 INFO L231 Difference]: Finished difference. Result has 103 places, 90 transitions, 627 flow [2024-10-14 19:53:38,818 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=627, PETRI_PLACES=103, PETRI_TRANSITIONS=90} [2024-10-14 19:53:38,819 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-10-14 19:53:38,819 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 90 transitions, 627 flow [2024-10-14 19:53:38,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.5) internal successors, (174), 12 states have internal predecessors, (174), 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 19:53:38,819 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:38,819 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:38,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-10-14 19:53:39,023 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 19:53:39,023 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:53:39,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:39,024 INFO L85 PathProgramCache]: Analyzing trace with hash 802293567, now seen corresponding path program 2 times [2024-10-14 19:53:39,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:39,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975150142] [2024-10-14 19:53:39,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:53:39,024 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 19:53:39,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:39,027 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 19:53:39,028 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 19:53:39,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 19:53:39,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:53:39,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 19:53:39,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:39,091 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 19:53:39,238 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 19:53:39,238 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:39,238 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:39,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975150142] [2024-10-14 19:53:39,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975150142] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:39,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:39,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:53:39,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451632963] [2024-10-14 19:53:39,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:39,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:53:39,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:39,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:53:39,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:53:39,288 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-10-14 19:53:39,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 90 transitions, 627 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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 19:53:39,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:39,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-10-14 19:53:39,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:39,521 INFO L124 PetriNetUnfolderBase]: 814/1640 cut-off events. [2024-10-14 19:53:39,521 INFO L125 PetriNetUnfolderBase]: For 2300/2363 co-relation queries the response was YES. [2024-10-14 19:53:39,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4982 conditions, 1640 events. 814/1640 cut-off events. For 2300/2363 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9977 event pairs, 368 based on Foata normal form. 105/1587 useless extension candidates. Maximal degree in co-relation 4921. Up to 922 conditions per place. [2024-10-14 19:53:39,527 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 54 selfloop transitions, 30 changer transitions 4/98 dead transitions. [2024-10-14 19:53:39,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 98 transitions, 843 flow [2024-10-14 19:53:39,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:53:39,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:53:39,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-10-14 19:53:39,528 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4488888888888889 [2024-10-14 19:53:39,529 INFO L175 Difference]: Start difference. First operand has 103 places, 90 transitions, 627 flow. Second operand 5 states and 101 transitions. [2024-10-14 19:53:39,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 98 transitions, 843 flow [2024-10-14 19:53:39,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 98 transitions, 802 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-14 19:53:39,533 INFO L231 Difference]: Finished difference. Result has 98 places, 85 transitions, 612 flow [2024-10-14 19:53:39,533 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=612, PETRI_PLACES=98, PETRI_TRANSITIONS=85} [2024-10-14 19:53:39,533 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-10-14 19:53:39,533 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 85 transitions, 612 flow [2024-10-14 19:53:39,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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 19:53:39,534 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:39,534 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:39,544 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 19:53:39,736 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 19:53:39,736 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:53:39,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:39,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1462660189, now seen corresponding path program 1 times [2024-10-14 19:53:39,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:39,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357455788] [2024-10-14 19:53:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:39,737 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 19:53:39,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:39,740 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 19:53:39,740 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 19:53:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:39,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 19:53:39,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:39,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:39,995 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:53:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:40,309 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:40,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357455788] [2024-10-14 19:53:40,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357455788] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:53:40,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:53:40,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-10-14 19:53:40,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310646107] [2024-10-14 19:53:40,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:53:40,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-14 19:53:40,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:40,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-14 19:53:40,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2024-10-14 19:53:40,453 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-10-14 19:53:40,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 85 transitions, 612 flow. Second operand has 17 states, 17 states have (on average 14.058823529411764) internal successors, (239), 17 states have internal predecessors, (239), 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 19:53:40,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:40,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-10-14 19:53:40,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:41,724 INFO L124 PetriNetUnfolderBase]: 1481/2827 cut-off events. [2024-10-14 19:53:41,724 INFO L125 PetriNetUnfolderBase]: For 4547/4547 co-relation queries the response was YES. [2024-10-14 19:53:41,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8600 conditions, 2827 events. 1481/2827 cut-off events. For 4547/4547 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 16336 event pairs, 173 based on Foata normal form. 137/2745 useless extension candidates. Maximal degree in co-relation 8542. Up to 687 conditions per place. [2024-10-14 19:53:41,737 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 178 selfloop transitions, 46 changer transitions 51/282 dead transitions. [2024-10-14 19:53:41,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 282 transitions, 2115 flow [2024-10-14 19:53:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 19:53:41,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-14 19:53:41,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 461 transitions. [2024-10-14 19:53:41,740 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46565656565656566 [2024-10-14 19:53:41,740 INFO L175 Difference]: Start difference. First operand has 98 places, 85 transitions, 612 flow. Second operand 22 states and 461 transitions. [2024-10-14 19:53:41,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 282 transitions, 2115 flow [2024-10-14 19:53:41,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 282 transitions, 1920 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-10-14 19:53:41,748 INFO L231 Difference]: Finished difference. Result has 123 places, 119 transitions, 1033 flow [2024-10-14 19:53:41,749 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1033, PETRI_PLACES=123, PETRI_TRANSITIONS=119} [2024-10-14 19:53:41,749 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2024-10-14 19:53:41,749 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 119 transitions, 1033 flow [2024-10-14 19:53:41,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.058823529411764) internal successors, (239), 17 states have internal predecessors, (239), 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 19:53:41,749 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:41,750 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-10-14 19:53:41,760 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 19:53:41,952 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 19:53:41,953 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:53:41,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:41,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1630359573, now seen corresponding path program 3 times [2024-10-14 19:53:41,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:41,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [870296127] [2024-10-14 19:53:41,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 19:53:41,954 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 19:53:41,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:41,956 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 19:53:41,957 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 19:53:42,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-14 19:53:42,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:53:42,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 19:53:42,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:42,120 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 19:53:42,562 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 19:53:42,562 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:53:44,126 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 19:53:44,126 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:44,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [870296127] [2024-10-14 19:53:44,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [870296127] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:53:44,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:53:44,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-10-14 19:53:44,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417924998] [2024-10-14 19:53:44,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:53:44,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 19:53:44,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:44,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 19:53:44,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-10-14 19:53:44,952 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-14 19:53:44,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 119 transitions, 1033 flow. Second operand has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 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 19:53:44,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:44,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-14 19:53:44,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:56,912 INFO L124 PetriNetUnfolderBase]: 1090/2231 cut-off events. [2024-10-14 19:53:56,913 INFO L125 PetriNetUnfolderBase]: For 8011/8027 co-relation queries the response was YES. [2024-10-14 19:53:56,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8190 conditions, 2231 events. 1090/2231 cut-off events. For 8011/8027 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13987 event pairs, 768 based on Foata normal form. 28/2062 useless extension candidates. Maximal degree in co-relation 7940. Up to 1869 conditions per place. [2024-10-14 19:53:56,964 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 79 selfloop transitions, 66 changer transitions 0/155 dead transitions. [2024-10-14 19:53:56,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 155 transitions, 1599 flow [2024-10-14 19:53:56,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-14 19:53:56,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-10-14 19:53:56,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 700 transitions. [2024-10-14 19:53:56,973 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33816425120772947 [2024-10-14 19:53:56,973 INFO L175 Difference]: Start difference. First operand has 123 places, 119 transitions, 1033 flow. Second operand 46 states and 700 transitions. [2024-10-14 19:53:56,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 155 transitions, 1599 flow [2024-10-14 19:53:56,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 155 transitions, 1443 flow, removed 62 selfloop flow, removed 10 redundant places. [2024-10-14 19:53:57,001 INFO L231 Difference]: Finished difference. Result has 164 places, 155 transitions, 1339 flow [2024-10-14 19:53:57,002 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1339, PETRI_PLACES=164, PETRI_TRANSITIONS=155} [2024-10-14 19:53:57,002 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-10-14 19:53:57,002 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 155 transitions, 1339 flow [2024-10-14 19:53:57,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 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 19:53:57,003 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:57,003 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:57,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2024-10-14 19:53:57,203 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 19:53:57,203 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:53:57,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:57,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1543588036, now seen corresponding path program 2 times [2024-10-14 19:53:57,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:57,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357047415] [2024-10-14 19:53:57,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:53:57,205 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 19:53:57,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:57,208 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 19:53:57,209 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 19:53:57,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 19:53:57,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:53:57,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 19:53:57,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:57,409 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 19:53:57,409 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:57,409 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:57,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357047415] [2024-10-14 19:53:57,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357047415] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:57,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:57,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:53:57,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661059191] [2024-10-14 19:53:57,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:57,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:53:57,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:57,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:53:57,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:53:57,457 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-14 19:53:57,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 155 transitions, 1339 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 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 19:53:57,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:57,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-14 19:53:57,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:57,896 INFO L124 PetriNetUnfolderBase]: 1186/2335 cut-off events. [2024-10-14 19:53:57,897 INFO L125 PetriNetUnfolderBase]: For 6087/6093 co-relation queries the response was YES. [2024-10-14 19:53:57,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8389 conditions, 2335 events. 1186/2335 cut-off events. For 6087/6093 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 13992 event pairs, 332 based on Foata normal form. 38/2201 useless extension candidates. Maximal degree in co-relation 8289. Up to 1355 conditions per place. [2024-10-14 19:53:57,907 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 131 selfloop transitions, 38 changer transitions 10/189 dead transitions. [2024-10-14 19:53:57,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 189 transitions, 1867 flow [2024-10-14 19:53:57,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 19:53:57,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 19:53:57,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-10-14 19:53:57,910 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-10-14 19:53:57,910 INFO L175 Difference]: Start difference. First operand has 164 places, 155 transitions, 1339 flow. Second operand 6 states and 130 transitions. [2024-10-14 19:53:57,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 189 transitions, 1867 flow [2024-10-14 19:53:57,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 189 transitions, 1705 flow, removed 51 selfloop flow, removed 21 redundant places. [2024-10-14 19:53:57,924 INFO L231 Difference]: Finished difference. Result has 150 places, 159 transitions, 1318 flow [2024-10-14 19:53:57,924 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1318, PETRI_PLACES=150, PETRI_TRANSITIONS=159} [2024-10-14 19:53:57,925 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-10-14 19:53:57,925 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 159 transitions, 1318 flow [2024-10-14 19:53:57,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 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 19:53:57,925 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:57,925 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:57,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2024-10-14 19:53:58,126 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 19:53:58,127 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:53:58,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:58,127 INFO L85 PathProgramCache]: Analyzing trace with hash -830463315, now seen corresponding path program 1 times [2024-10-14 19:53:58,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:58,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126190300] [2024-10-14 19:53:58,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:58,128 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 19:53:58,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:58,130 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 19:53:58,131 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 19:53:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:58,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:53:58,187 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:53:58,207 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:53:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:53:58,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:58,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126190300] [2024-10-14 19:53:58,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126190300] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:53:58,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:53:58,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2024-10-14 19:53:58,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645019234] [2024-10-14 19:53:58,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:53:58,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:53:58,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:58,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:53:58,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:53:58,242 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-10-14 19:53:58,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 159 transitions, 1318 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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 19:53:58,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:58,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-10-14 19:53:58,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:58,659 INFO L124 PetriNetUnfolderBase]: 1641/3026 cut-off events. [2024-10-14 19:53:58,659 INFO L125 PetriNetUnfolderBase]: For 9083/9125 co-relation queries the response was YES. [2024-10-14 19:53:58,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11313 conditions, 3026 events. 1641/3026 cut-off events. For 9083/9125 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 18380 event pairs, 273 based on Foata normal form. 42/2915 useless extension candidates. Maximal degree in co-relation 11223. Up to 1535 conditions per place. [2024-10-14 19:53:58,675 INFO L140 encePairwiseOnDemand]: 41/45 looper letters, 155 selfloop transitions, 3 changer transitions 0/166 dead transitions. [2024-10-14 19:53:58,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 166 transitions, 1627 flow [2024-10-14 19:53:58,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:53:58,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:53:58,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2024-10-14 19:53:58,677 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-10-14 19:53:58,677 INFO L175 Difference]: Start difference. First operand has 150 places, 159 transitions, 1318 flow. Second operand 4 states and 87 transitions. [2024-10-14 19:53:58,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 166 transitions, 1627 flow [2024-10-14 19:53:58,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 166 transitions, 1578 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-14 19:53:58,691 INFO L231 Difference]: Finished difference. Result has 152 places, 143 transitions, 1133 flow [2024-10-14 19:53:58,691 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1133, PETRI_PLACES=152, PETRI_TRANSITIONS=143} [2024-10-14 19:53:58,692 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-10-14 19:53:58,692 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 143 transitions, 1133 flow [2024-10-14 19:53:58,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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 19:53:58,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:58,692 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:58,697 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 19:53:58,895 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 19:53:58,896 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:53:58,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:58,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1676323456, now seen corresponding path program 1 times [2024-10-14 19:53:58,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:58,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [601208548] [2024-10-14 19:53:58,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:58,897 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 19:53:58,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:58,898 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 19:53:58,900 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 19:53:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:58,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 19:53:58,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:59,116 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:53:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:59,391 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:59,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [601208548] [2024-10-14 19:53:59,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [601208548] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:53:59,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:53:59,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-14 19:53:59,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240986078] [2024-10-14 19:53:59,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:53:59,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:53:59,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:59,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:53:59,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:53:59,508 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-10-14 19:53:59,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 143 transitions, 1133 flow. Second operand has 14 states, 14 states have (on average 16.785714285714285) internal successors, (235), 14 states have internal predecessors, (235), 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 19:53:59,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:59,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-10-14 19:53:59,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:59,937 INFO L124 PetriNetUnfolderBase]: 957/1944 cut-off events. [2024-10-14 19:53:59,937 INFO L125 PetriNetUnfolderBase]: For 5033/5039 co-relation queries the response was YES. [2024-10-14 19:53:59,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7165 conditions, 1944 events. 957/1944 cut-off events. For 5033/5039 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 11117 event pairs, 705 based on Foata normal form. 11/1834 useless extension candidates. Maximal degree in co-relation 7075. Up to 1596 conditions per place. [2024-10-14 19:53:59,947 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 87 selfloop transitions, 49 changer transitions 4/152 dead transitions. [2024-10-14 19:53:59,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 152 transitions, 1380 flow [2024-10-14 19:53:59,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 19:53:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 19:53:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-10-14 19:53:59,948 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-10-14 19:53:59,948 INFO L175 Difference]: Start difference. First operand has 152 places, 143 transitions, 1133 flow. Second operand 9 states and 180 transitions. [2024-10-14 19:53:59,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 152 transitions, 1380 flow [2024-10-14 19:53:59,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 152 transitions, 1362 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-10-14 19:53:59,958 INFO L231 Difference]: Finished difference. Result has 154 places, 130 transitions, 1104 flow [2024-10-14 19:53:59,958 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1104, PETRI_PLACES=154, PETRI_TRANSITIONS=130} [2024-10-14 19:53:59,959 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-10-14 19:53:59,959 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 130 transitions, 1104 flow [2024-10-14 19:53:59,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.785714285714285) internal successors, (235), 14 states have internal predecessors, (235), 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 19:53:59,959 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:59,959 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 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 19:53:59,965 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 (17)] Forceful destruction successful, exit code 0 [2024-10-14 19:54:00,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:00,160 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:54:00,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:00,160 INFO L85 PathProgramCache]: Analyzing trace with hash 326554079, now seen corresponding path program 1 times [2024-10-14 19:54:00,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:00,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1678680856] [2024-10-14 19:54:00,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:54:00,161 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 19:54:00,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:00,166 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:00,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-10-14 19:54:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:54:00,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 19:54:00,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:54:00,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:54:00,539 INFO L349 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2024-10-14 19:54:00,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 141 treesize of output 84 [2024-10-14 19:54:04,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:54:04,416 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:04,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1678680856] [2024-10-14 19:54:04,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1678680856] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:54:04,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:54:04,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-10-14 19:54:04,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804319661] [2024-10-14 19:54:04,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:54:04,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 19:54:04,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:04,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 19:54:04,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-14 19:54:04,545 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-10-14 19:54:04,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 130 transitions, 1104 flow. Second operand has 8 states, 8 states have (on average 19.75) internal successors, (158), 8 states have internal predecessors, (158), 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 19:54:04,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:04,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-10-14 19:54:04,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:54:05,161 INFO L124 PetriNetUnfolderBase]: 1187/2478 cut-off events. [2024-10-14 19:54:05,161 INFO L125 PetriNetUnfolderBase]: For 5588/5588 co-relation queries the response was YES. [2024-10-14 19:54:05,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8889 conditions, 2478 events. 1187/2478 cut-off events. For 5588/5588 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 14866 event pairs, 192 based on Foata normal form. 7/2348 useless extension candidates. Maximal degree in co-relation 8798. Up to 850 conditions per place. [2024-10-14 19:54:05,172 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 138 selfloop transitions, 10 changer transitions 24/183 dead transitions. [2024-10-14 19:54:05,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 183 transitions, 1734 flow [2024-10-14 19:54:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 19:54:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 19:54:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-10-14 19:54:05,176 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2024-10-14 19:54:05,176 INFO L175 Difference]: Start difference. First operand has 154 places, 130 transitions, 1104 flow. Second operand 6 states and 148 transitions. [2024-10-14 19:54:05,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 183 transitions, 1734 flow [2024-10-14 19:54:05,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 183 transitions, 1679 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-14 19:54:05,189 INFO L231 Difference]: Finished difference. Result has 153 places, 123 transitions, 1020 flow [2024-10-14 19:54:05,189 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1049, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1020, PETRI_PLACES=153, PETRI_TRANSITIONS=123} [2024-10-14 19:54:05,189 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-10-14 19:54:05,189 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 123 transitions, 1020 flow [2024-10-14 19:54:05,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.75) internal successors, (158), 8 states have internal predecessors, (158), 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 19:54:05,190 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:05,190 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:54:05,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2024-10-14 19:54:05,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:05,393 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:54:05,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:05,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1132212631, now seen corresponding path program 2 times [2024-10-14 19:54:05,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:05,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1091162760] [2024-10-14 19:54:05,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:54:05,394 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 19:54:05,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:05,398 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:05,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2024-10-14 19:54:05,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 19:54:05,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:54:05,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 19:54:05,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:05,462 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 19:54:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 19:54:05,660 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:54:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 19:54:06,318 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:06,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1091162760] [2024-10-14 19:54:06,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1091162760] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:54:06,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:54:06,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-10-14 19:54:06,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686725131] [2024-10-14 19:54:06,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:54:06,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 19:54:06,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:06,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 19:54:06,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-14 19:54:06,713 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-14 19:54:06,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 123 transitions, 1020 flow. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 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 19:54:06,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:06,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-14 19:54:06,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:54:07,172 INFO L124 PetriNetUnfolderBase]: 988/1887 cut-off events. [2024-10-14 19:54:07,172 INFO L125 PetriNetUnfolderBase]: For 5214/5220 co-relation queries the response was YES. [2024-10-14 19:54:07,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7131 conditions, 1887 events. 988/1887 cut-off events. For 5214/5220 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10058 event pairs, 510 based on Foata normal form. 118/1885 useless extension candidates. Maximal degree in co-relation 7084. Up to 1223 conditions per place. [2024-10-14 19:54:07,182 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 100 selfloop transitions, 29 changer transitions 0/139 dead transitions. [2024-10-14 19:54:07,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 139 transitions, 1383 flow [2024-10-14 19:54:07,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:54:07,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:54:07,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-10-14 19:54:07,187 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-10-14 19:54:07,187 INFO L175 Difference]: Start difference. First operand has 153 places, 123 transitions, 1020 flow. Second operand 5 states and 100 transitions. [2024-10-14 19:54:07,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 139 transitions, 1383 flow [2024-10-14 19:54:07,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 139 transitions, 1334 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-10-14 19:54:07,196 INFO L231 Difference]: Finished difference. Result has 139 places, 122 transitions, 1025 flow [2024-10-14 19:54:07,196 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1025, PETRI_PLACES=139, PETRI_TRANSITIONS=122} [2024-10-14 19:54:07,197 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-10-14 19:54:07,197 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 122 transitions, 1025 flow [2024-10-14 19:54:07,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 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 19:54:07,197 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:07,197 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 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 19:54:07,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2024-10-14 19:54:07,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:07,398 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:54:07,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:07,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1756962457, now seen corresponding path program 1 times [2024-10-14 19:54:07,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:07,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864857279] [2024-10-14 19:54:07,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:54:07,398 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 19:54:07,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:07,399 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:07,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2024-10-14 19:54:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:54:07,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 19:54:07,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 19:54:07,855 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:54:16,791 INFO L349 Elim1Store]: treesize reduction 672, result has 23.7 percent of original size [2024-10-14 19:54:16,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 275 treesize of output 270