./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-send-receive-alt.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-send-receive-alt.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 d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:58:25,124 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:58:25,214 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:58:25,221 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:58:25,223 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:58:25,255 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:58:25,256 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:58:25,256 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:58:25,257 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:58:25,258 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:58:25,259 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:58:25,259 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:58:25,260 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:58:25,262 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:58:25,262 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:58:25,263 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:58:25,263 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:58:25,263 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:58:25,263 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:58:25,264 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:58:25,264 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:58:25,267 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:58:25,268 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:58:25,268 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:58:25,268 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:58:25,269 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:58:25,269 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:58:25,269 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:58:25,269 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:58:25,270 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:58:25,270 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:58:25,271 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:58:25,271 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:58:25,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:58:25,272 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:58:25,273 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:58:25,273 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:58:25,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:58:25,273 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:58:25,274 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:58:25,274 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:58:25,274 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:58:25,275 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2024-10-14 19:58:25,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:58:25,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:58:25,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:58:25,550 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:58:25,551 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:58:25,552 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-10-14 19:58:27,022 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:58:27,212 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:58:27,213 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-10-14 19:58:27,221 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a2a9e5f3/dccc41df53f24c099ab1c2d5b41e5458/FLAGa56cf9fa9 [2024-10-14 19:58:27,234 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a2a9e5f3/dccc41df53f24c099ab1c2d5b41e5458 [2024-10-14 19:58:27,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:58:27,238 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:58:27,239 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:58:27,239 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:58:27,245 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:58:27,246 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:58:27" (1/1) ... [2024-10-14 19:58:27,247 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@155a8e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:58:27, skipping insertion in model container [2024-10-14 19:58:27,247 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:58:27" (1/1) ... [2024-10-14 19:58:27,272 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:58:27,447 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:58:27,456 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 19:58:27,457 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@55091058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:58:27, skipping insertion in model container [2024-10-14 19:58:27,458 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:58:27,458 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-14 19:58:27,460 INFO L158 Benchmark]: Toolchain (without parser) took 220.99ms. Allocated memory is still 157.3MB. Free memory was 101.7MB in the beginning and 90.8MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-14 19:58:27,461 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 157.3MB. Free memory is still 119.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 19:58:27,462 INFO L158 Benchmark]: CACSL2BoogieTranslator took 218.74ms. Allocated memory is still 157.3MB. Free memory was 101.2MB in the beginning and 90.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-14 19:58:27,463 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 157.3MB. Free memory is still 119.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 218.74ms. Allocated memory is still 157.3MB. Free memory was 101.2MB in the beginning and 90.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 103]: 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-send-receive-alt.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 d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:58:29,426 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:58:29,517 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-14 19:58:29,524 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:58:29,525 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:58:29,562 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:58:29,563 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:58:29,563 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:58:29,564 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:58:29,564 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:58:29,565 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:58:29,565 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:58:29,566 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:58:29,568 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:58:29,569 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:58:29,569 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:58:29,569 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:58:29,570 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:58:29,570 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:58:29,570 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:58:29,574 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:58:29,575 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:58:29,575 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:58:29,575 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:58:29,576 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:58:29,576 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-14 19:58:29,576 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:58:29,577 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-14 19:58:29,577 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:58:29,577 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:58:29,577 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:58:29,578 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:58:29,578 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:58:29,578 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:58:29,578 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:58:29,578 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:58:29,579 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:58:29,579 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:58:29,579 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-14 19:58:29,579 INFO L153 SettingsManager]: * Command for external solver=cvc5 --incremental --print-success --lang smt [2024-10-14 19:58:29,580 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:58:29,581 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:58:29,581 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:58:29,581 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:58:29,582 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-14 19:58:29,582 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2024-10-14 19:58:29,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:58:29,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:58:29,944 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:58:29,945 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:58:29,946 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:58:29,949 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-10-14 19:58:31,547 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:58:31,759 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:58:31,759 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-10-14 19:58:31,767 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c127602a/fca69f31160c432abf6adb4e79a69b66/FLAG6faa0470a [2024-10-14 19:58:31,780 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c127602a/fca69f31160c432abf6adb4e79a69b66 [2024-10-14 19:58:31,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:58:31,783 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:58:31,785 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:58:31,785 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:58:31,790 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:58:31,791 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:58:31" (1/1) ... [2024-10-14 19:58:31,792 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4269bcf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:58:31, skipping insertion in model container [2024-10-14 19:58:31,793 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:58:31" (1/1) ... [2024-10-14 19:58:31,819 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:58:32,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:58:32,074 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-14 19:58:32,077 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:58:32,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:58:32,107 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:58:32,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:58:32,157 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:58:32,157 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:58:32 WrapperNode [2024-10-14 19:58:32,157 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:58:32,158 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:58:32,159 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:58:32,160 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:58:32,166 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:58:32" (1/1) ... [2024-10-14 19:58:32,183 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:58:32" (1/1) ... [2024-10-14 19:58:32,216 INFO L138 Inliner]: procedures = 25, calls = 28, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 138 [2024-10-14 19:58:32,220 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:58:32,221 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:58:32,221 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:58:32,221 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:58:32,232 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:58:32" (1/1) ... [2024-10-14 19:58:32,232 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:58:32" (1/1) ... [2024-10-14 19:58:32,236 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:58:32" (1/1) ... [2024-10-14 19:58:32,262 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 19:58:32,264 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:58:32" (1/1) ... [2024-10-14 19:58:32,264 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:58:32" (1/1) ... [2024-10-14 19:58:32,275 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:58:32" (1/1) ... [2024-10-14 19:58:32,283 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:58:32" (1/1) ... [2024-10-14 19:58:32,284 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:58:32" (1/1) ... [2024-10-14 19:58:32,290 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:58:32" (1/1) ... [2024-10-14 19:58:32,296 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:58:32,297 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:58:32,297 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:58:32,297 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:58:32,298 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:58:32" (1/1) ... [2024-10-14 19:58:32,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:58:32,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:58:32,335 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 19:58:32,341 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 19:58:32,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:58:32,387 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 19:58:32,387 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 19:58:32,387 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 19:58:32,387 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 19:58:32,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-14 19:58:32,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-14 19:58:32,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 19:58:32,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 19:58:32,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 19:58:32,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-14 19:58:32,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-14 19:58:32,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:58:32,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:58:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-14 19:58:32,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-14 19:58:32,393 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 19:58:32,525 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:58:32,527 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:58:32,910 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:58:32,910 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:58:33,148 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:58:33,148 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-14 19:58:33,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:58:33 BoogieIcfgContainer [2024-10-14 19:58:33,149 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:58:33,150 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:58:33,151 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:58:33,154 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:58:33,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:58:31" (1/3) ... [2024-10-14 19:58:33,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16042e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:58:33, skipping insertion in model container [2024-10-14 19:58:33,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:58:32" (2/3) ... [2024-10-14 19:58:33,156 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16042e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:58:33, skipping insertion in model container [2024-10-14 19:58:33,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:58:33" (3/3) ... [2024-10-14 19:58:33,157 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2024-10-14 19:58:33,185 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:58:33,186 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-10-14 19:58:33,186 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:58:33,244 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 19:58:33,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 43 transitions, 100 flow [2024-10-14 19:58:33,318 INFO L124 PetriNetUnfolderBase]: 6/41 cut-off events. [2024-10-14 19:58:33,319 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 19:58:33,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 6/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 74 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-10-14 19:58:33,325 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 43 transitions, 100 flow [2024-10-14 19:58:33,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 92 flow [2024-10-14 19:58:33,342 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:58:33,350 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;@49f9926f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:58:33,351 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-10-14 19:58:33,356 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:58:33,356 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-14 19:58:33,356 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:58:33,357 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:58:33,357 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:58:33,358 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 19:58:33,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:58:33,365 INFO L85 PathProgramCache]: Analyzing trace with hash 450939, now seen corresponding path program 1 times [2024-10-14 19:58:33,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:58:33,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507624193] [2024-10-14 19:58:33,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:58:33,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:58:33,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:58:33,381 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 19:58:33,382 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 19:58:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:58:33,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:58:33,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:58:33,532 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 19:58:33,548 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 19:58:33,549 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:58:33,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:58:33,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507624193] [2024-10-14 19:58:33,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507624193] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:58:33,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:58:33,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:58:33,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300795289] [2024-10-14 19:58:33,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:58:33,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:58:33,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:58:33,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:58:33,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:58:33,617 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-10-14 19:58:33,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 19:58:33,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:58:33,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-10-14 19:58:33,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:58:33,876 INFO L124 PetriNetUnfolderBase]: 308/550 cut-off events. [2024-10-14 19:58:33,876 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-10-14 19:58:33,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 550 events. 308/550 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2413 event pairs, 250 based on Foata normal form. 1/376 useless extension candidates. Maximal degree in co-relation 1005. Up to 497 conditions per place. [2024-10-14 19:58:33,887 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-10-14 19:58:33,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 140 flow [2024-10-14 19:58:33,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:58:33,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:58:33,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-10-14 19:58:33,901 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-10-14 19:58:33,903 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 92 flow. Second operand 3 states and 60 transitions. [2024-10-14 19:58:33,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 140 flow [2024-10-14 19:58:33,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 132 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 19:58:33,912 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 78 flow [2024-10-14 19:58:33,915 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-10-14 19:58:33,918 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -5 predicate places. [2024-10-14 19:58:33,919 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 78 flow [2024-10-14 19:58:33,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 19:58:33,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:58:33,919 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:58:33,923 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 19:58:34,120 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 19:58:34,121 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 19:58:34,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:58:34,121 INFO L85 PathProgramCache]: Analyzing trace with hash 450940, now seen corresponding path program 1 times [2024-10-14 19:58:34,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:58:34,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850892179] [2024-10-14 19:58:34,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:58:34,122 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 19:58:34,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:58:34,151 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 19:58:34,158 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 19:58:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:58:34,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:58:34,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:58:34,216 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 19:58:34,292 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 19:58:34,292 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:58:34,292 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:58:34,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850892179] [2024-10-14 19:58:34,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850892179] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:58:34,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:58:34,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:58:34,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057056725] [2024-10-14 19:58:34,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:58:34,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:58:34,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:58:34,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:58:34,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:58:34,302 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-10-14 19:58:34,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 19:58:34,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:58:34,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-10-14 19:58:34,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:58:34,574 INFO L124 PetriNetUnfolderBase]: 309/553 cut-off events. [2024-10-14 19:58:34,574 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-14 19:58:34,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1071 conditions, 553 events. 309/553 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2431 event pairs, 250 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 1049. Up to 502 conditions per place. [2024-10-14 19:58:34,581 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 29 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2024-10-14 19:58:34,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 152 flow [2024-10-14 19:58:34,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:58:34,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:58:34,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-10-14 19:58:34,586 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-10-14 19:58:34,586 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 78 flow. Second operand 4 states and 70 transitions. [2024-10-14 19:58:34,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 152 flow [2024-10-14 19:58:34,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:58:34,589 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 101 flow [2024-10-14 19:58:34,590 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2024-10-14 19:58:34,591 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2024-10-14 19:58:34,591 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 101 flow [2024-10-14 19:58:34,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 19:58:34,591 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:58:34,591 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-14 19:58:34,598 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 19:58:34,792 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 19:58:34,792 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 19:58:34,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:58:34,793 INFO L85 PathProgramCache]: Analyzing trace with hash 433367025, now seen corresponding path program 1 times [2024-10-14 19:58:34,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:58:34,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837667904] [2024-10-14 19:58:34,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:58:34,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:58:34,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:58:34,797 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 19:58:34,799 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 19:58:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:58:34,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 19:58:34,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:58:34,863 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 19:58:35,023 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 19:58:35,024 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:58:35,318 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 19:58:35,318 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:58:35,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837667904] [2024-10-14 19:58:35,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837667904] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:58:35,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:58:35,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:58:35,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338222242] [2024-10-14 19:58:35,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:58:35,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:58:35,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:58:35,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:58:35,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:58:35,386 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-10-14 19:58:35,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 101 flow. Second operand has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:58:35,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:58:35,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-10-14 19:58:35,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:58:36,196 INFO L124 PetriNetUnfolderBase]: 312/562 cut-off events. [2024-10-14 19:58:36,197 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-14 19:58:36,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1108 conditions, 562 events. 312/562 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2498 event pairs, 250 based on Foata normal form. 0/383 useless extension candidates. Maximal degree in co-relation 1056. Up to 505 conditions per place. [2024-10-14 19:58:36,201 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 29 selfloop transitions, 13 changer transitions 0/47 dead transitions. [2024-10-14 19:58:36,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 221 flow [2024-10-14 19:58:36,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 19:58:36,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 19:58:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 135 transitions. [2024-10-14 19:58:36,204 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.313953488372093 [2024-10-14 19:58:36,204 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 101 flow. Second operand 10 states and 135 transitions. [2024-10-14 19:58:36,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 221 flow [2024-10-14 19:58:36,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:58:36,206 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 178 flow [2024-10-14 19:58:36,206 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=178, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2024-10-14 19:58:36,207 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-10-14 19:58:36,207 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 178 flow [2024-10-14 19:58:36,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:58:36,207 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:58:36,207 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:58:36,211 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 19:58:36,410 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 19:58:36,410 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:58:36,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:58:36,411 INFO L85 PathProgramCache]: Analyzing trace with hash -81413083, now seen corresponding path program 1 times [2024-10-14 19:58:36,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:58:36,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906674578] [2024-10-14 19:58:36,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:58:36,412 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 19:58:36,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:58:36,414 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 19:58:36,415 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 19:58:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:58:36,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 19:58:36,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:58:36,464 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 19:58:36,485 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 19:58:36,485 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:58:36,485 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:58:36,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906674578] [2024-10-14 19:58:36,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906674578] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:58:36,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:58:36,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:58:36,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56843946] [2024-10-14 19:58:36,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:58:36,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:58:36,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:58:36,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:58:36,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:58:36,503 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-10-14 19:58:36,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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 19:58:36,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:58:36,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-10-14 19:58:36,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:58:36,621 INFO L124 PetriNetUnfolderBase]: 231/423 cut-off events. [2024-10-14 19:58:36,621 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-10-14 19:58:36,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 423 events. 231/423 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1717 event pairs, 177 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 823. Up to 367 conditions per place. [2024-10-14 19:58:36,624 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 32 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2024-10-14 19:58:36,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 248 flow [2024-10-14 19:58:36,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:58:36,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:58:36,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-10-14 19:58:36,626 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-10-14 19:58:36,626 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 178 flow. Second operand 4 states and 65 transitions. [2024-10-14 19:58:36,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 248 flow [2024-10-14 19:58:36,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 44 transitions, 218 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-10-14 19:58:36,629 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 154 flow [2024-10-14 19:58:36,629 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2024-10-14 19:58:36,630 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2024-10-14 19:58:36,630 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 154 flow [2024-10-14 19:58:36,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 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 19:58:36,630 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:58:36,630 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:58:36,634 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 19:58:36,834 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 19:58:36,835 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:58:36,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:58:36,835 INFO L85 PathProgramCache]: Analyzing trace with hash -81413082, now seen corresponding path program 1 times [2024-10-14 19:58:36,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:58:36,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780048605] [2024-10-14 19:58:36,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:58:36,836 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 19:58:36,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:58:36,839 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 19:58:36,840 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 19:58:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:58:36,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:58:36,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:58:36,910 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 19:58:36,910 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:58:36,910 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:58:36,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780048605] [2024-10-14 19:58:36,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780048605] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:58:36,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:58:36,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:58:36,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889080989] [2024-10-14 19:58:36,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:58:36,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:58:36,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:58:36,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:58:36,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:58:36,913 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-10-14 19:58:36,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 19:58:36,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:58:36,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-10-14 19:58:36,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:58:37,053 INFO L124 PetriNetUnfolderBase]: 306/581 cut-off events. [2024-10-14 19:58:37,053 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-10-14 19:58:37,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 581 events. 306/581 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2490 event pairs, 134 based on Foata normal form. 18/453 useless extension candidates. Maximal degree in co-relation 1119. Up to 299 conditions per place. [2024-10-14 19:58:37,057 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 51 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2024-10-14 19:58:37,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 296 flow [2024-10-14 19:58:37,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:58:37,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:58:37,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-10-14 19:58:37,059 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-10-14 19:58:37,059 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 154 flow. Second operand 3 states and 74 transitions. [2024-10-14 19:58:37,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 296 flow [2024-10-14 19:58:37,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 60 transitions, 289 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:58:37,063 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 168 flow [2024-10-14 19:58:37,063 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2024-10-14 19:58:37,064 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2024-10-14 19:58:37,064 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 168 flow [2024-10-14 19:58:37,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 19:58:37,064 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:58:37,064 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:58:37,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-10-14 19:58:37,270 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 19:58:37,271 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:58:37,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:58:37,271 INFO L85 PathProgramCache]: Analyzing trace with hash -720391010, now seen corresponding path program 1 times [2024-10-14 19:58:37,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:58:37,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933104435] [2024-10-14 19:58:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:58:37,272 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 19:58:37,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:58:37,275 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 19:58:37,276 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 19:58:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:58:37,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 19:58:37,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:58:37,399 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 19:58:37,400 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:58:37,400 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:58:37,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933104435] [2024-10-14 19:58:37,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933104435] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:58:37,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:58:37,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:58:37,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911479055] [2024-10-14 19:58:37,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:58:37,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:58:37,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:58:37,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:58:37,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:58:37,411 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-10-14 19:58:37,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 168 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:58:37,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:58:37,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-10-14 19:58:37,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:58:37,581 INFO L124 PetriNetUnfolderBase]: 373/715 cut-off events. [2024-10-14 19:58:37,581 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-10-14 19:58:37,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 715 events. 373/715 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3215 event pairs, 314 based on Foata normal form. 0/608 useless extension candidates. Maximal degree in co-relation 1496. Up to 522 conditions per place. [2024-10-14 19:58:37,585 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 51 selfloop transitions, 3 changer transitions 1/61 dead transitions. [2024-10-14 19:58:37,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 61 transitions, 312 flow [2024-10-14 19:58:37,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:58:37,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:58:37,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-10-14 19:58:37,587 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4941860465116279 [2024-10-14 19:58:37,587 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 168 flow. Second operand 4 states and 85 transitions. [2024-10-14 19:58:37,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 61 transitions, 312 flow [2024-10-14 19:58:37,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 309 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:58:37,590 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 174 flow [2024-10-14 19:58:37,590 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-10-14 19:58:37,590 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-10-14 19:58:37,591 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 174 flow [2024-10-14 19:58:37,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:58:37,591 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:58:37,591 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-14 19:58:37,596 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 19:58:37,791 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 19:58:37,792 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:58:37,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:58:37,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1515226064, now seen corresponding path program 2 times [2024-10-14 19:58:37,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:58:37,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720046040] [2024-10-14 19:58:37,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:58:37,793 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 19:58:37,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:58:37,794 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 19:58:37,795 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 19:58:37,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:58:37,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:58:37,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 19:58:37,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:58:37,872 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 19:58:38,150 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 19:58:38,151 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:58:38,873 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 19:58:38,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:58:38,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720046040] [2024-10-14 19:58:38,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720046040] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:58:38,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:58:38,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:58:38,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716838287] [2024-10-14 19:58:38,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:58:38,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:58:38,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:58:38,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:58:38,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:58:39,148 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-10-14 19:58:39,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 174 flow. Second operand has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 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 19:58:39,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:58:39,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-10-14 19:58:39,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:58:41,065 INFO L124 PetriNetUnfolderBase]: 379/733 cut-off events. [2024-10-14 19:58:41,065 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2024-10-14 19:58:41,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 733 events. 379/733 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3349 event pairs, 314 based on Foata normal form. 6/651 useless extension candidates. Maximal degree in co-relation 1503. Up to 659 conditions per place. [2024-10-14 19:58:41,070 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 28 selfloop transitions, 31 changer transitions 0/64 dead transitions. [2024-10-14 19:58:41,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 64 transitions, 382 flow [2024-10-14 19:58:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 19:58:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-14 19:58:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 261 transitions. [2024-10-14 19:58:41,073 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2758985200845666 [2024-10-14 19:58:41,073 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 174 flow. Second operand 22 states and 261 transitions. [2024-10-14 19:58:41,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 64 transitions, 382 flow [2024-10-14 19:58:41,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 64 transitions, 377 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:58:41,077 INFO L231 Difference]: Finished difference. Result has 76 places, 64 transitions, 351 flow [2024-10-14 19:58:41,078 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=351, PETRI_PLACES=76, PETRI_TRANSITIONS=64} [2024-10-14 19:58:41,079 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-10-14 19:58:41,079 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 64 transitions, 351 flow [2024-10-14 19:58:41,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.571428571428571) internal successors, (148), 14 states have internal predecessors, (148), 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 19:58:41,079 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:58:41,079 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:58:41,084 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 19:58:41,283 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 19:58:41,283 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:58:41,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:58:41,284 INFO L85 PathProgramCache]: Analyzing trace with hash 759214251, now seen corresponding path program 1 times [2024-10-14 19:58:41,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:58:41,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [370332448] [2024-10-14 19:58:41,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:58:41,284 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 19:58:41,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:58:41,285 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 19:58:41,286 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 19:58:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:58:41,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:58:41,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:58:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:58:41,359 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:58:41,359 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:58:41,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [370332448] [2024-10-14 19:58:41,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [370332448] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:58:41,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:58:41,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:58:41,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126009398] [2024-10-14 19:58:41,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:58:41,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:58:41,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:58:41,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:58:41,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:58:41,368 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-10-14 19:58:41,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 64 transitions, 351 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 19:58:41,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:58:41,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-10-14 19:58:41,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:58:41,521 INFO L124 PetriNetUnfolderBase]: 420/784 cut-off events. [2024-10-14 19:58:41,522 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2024-10-14 19:58:41,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1779 conditions, 784 events. 420/784 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3528 event pairs, 168 based on Foata normal form. 11/724 useless extension candidates. Maximal degree in co-relation 1728. Up to 466 conditions per place. [2024-10-14 19:58:41,527 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 73 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2024-10-14 19:58:41,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 79 transitions, 537 flow [2024-10-14 19:58:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:58:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:58:41,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-10-14 19:58:41,528 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5426356589147286 [2024-10-14 19:58:41,528 INFO L175 Difference]: Start difference. First operand has 76 places, 64 transitions, 351 flow. Second operand 3 states and 70 transitions. [2024-10-14 19:58:41,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 79 transitions, 537 flow [2024-10-14 19:58:41,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 79 transitions, 457 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-10-14 19:58:41,532 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 279 flow [2024-10-14 19:58:41,532 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2024-10-14 19:58:41,533 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 29 predicate places. [2024-10-14 19:58:41,533 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 279 flow [2024-10-14 19:58:41,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 19:58:41,534 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:58:41,534 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:58:41,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2024-10-14 19:58:41,734 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 19:58:41,735 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:58:41,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:58:41,736 INFO L85 PathProgramCache]: Analyzing trace with hash 759214217, now seen corresponding path program 1 times [2024-10-14 19:58:41,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:58:41,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066279585] [2024-10-14 19:58:41,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:58:41,737 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 19:58:41,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:58:41,741 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 19:58:41,742 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 19:58:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:58:41,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 19:58:41,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:58:41,833 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 19:58:42,113 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 19:58:42,113 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:58:42,808 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 19:58:42,808 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:58:42,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066279585] [2024-10-14 19:58:42,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066279585] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:58:42,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:58:42,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:58:42,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375864969] [2024-10-14 19:58:42,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:58:42,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:58:42,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:58:42,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:58:42,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:58:42,915 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-10-14 19:58:42,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 279 flow. Second operand has 10 states, 10 states have (on average 11.2) internal successors, (112), 10 states have internal predecessors, (112), 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 19:58:42,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:58:42,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-10-14 19:58:42,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:58:45,488 INFO L124 PetriNetUnfolderBase]: 801/1567 cut-off events. [2024-10-14 19:58:45,488 INFO L125 PetriNetUnfolderBase]: For 345/345 co-relation queries the response was YES. [2024-10-14 19:58:45,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3481 conditions, 1567 events. 801/1567 cut-off events. For 345/345 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 8519 event pairs, 622 based on Foata normal form. 76/1528 useless extension candidates. Maximal degree in co-relation 3434. Up to 510 conditions per place. [2024-10-14 19:58:45,499 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 94 selfloop transitions, 31 changer transitions 1/132 dead transitions. [2024-10-14 19:58:45,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 132 transitions, 712 flow [2024-10-14 19:58:45,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 19:58:45,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 19:58:45,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-10-14 19:58:45,502 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44820295983086683 [2024-10-14 19:58:45,502 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 279 flow. Second operand 11 states and 212 transitions. [2024-10-14 19:58:45,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 132 transitions, 712 flow [2024-10-14 19:58:45,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 132 transitions, 707 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:58:45,508 INFO L231 Difference]: Finished difference. Result has 83 places, 72 transitions, 416 flow [2024-10-14 19:58:45,508 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=416, PETRI_PLACES=83, PETRI_TRANSITIONS=72} [2024-10-14 19:58:45,511 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 42 predicate places. [2024-10-14 19:58:45,511 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 72 transitions, 416 flow [2024-10-14 19:58:45,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.2) internal successors, (112), 10 states have internal predecessors, (112), 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 19:58:45,512 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:58:45,512 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:58:45,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2024-10-14 19:58:45,712 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 19:58:45,713 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:58:45,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:58:45,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1695642678, now seen corresponding path program 2 times [2024-10-14 19:58:45,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:58:45,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79285616] [2024-10-14 19:58:45,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:58:45,714 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 19:58:45,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:58:45,715 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 19:58:45,716 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 19:58:45,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 19:58:45,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:58:45,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 19:58:45,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:58:45,799 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 19:58:46,046 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 19:58:46,047 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:58:46,047 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:58:46,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79285616] [2024-10-14 19:58:46,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [79285616] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:58:46,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:58:46,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:58:46,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934303432] [2024-10-14 19:58:46,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:58:46,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:58:46,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:58:46,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:58:46,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:58:46,097 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-10-14 19:58:46,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 72 transitions, 416 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 19:58:46,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:58:46,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-10-14 19:58:46,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:58:46,471 INFO L124 PetriNetUnfolderBase]: 727/1449 cut-off events. [2024-10-14 19:58:46,471 INFO L125 PetriNetUnfolderBase]: For 1215/1215 co-relation queries the response was YES. [2024-10-14 19:58:46,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3550 conditions, 1449 events. 727/1449 cut-off events. For 1215/1215 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7870 event pairs, 521 based on Foata normal form. 49/1403 useless extension candidates. Maximal degree in co-relation 3496. Up to 1070 conditions per place. [2024-10-14 19:58:46,481 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 45 selfloop transitions, 24 changer transitions 0/76 dead transitions. [2024-10-14 19:58:46,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 76 transitions, 549 flow [2024-10-14 19:58:46,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:58:46,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:58:46,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-10-14 19:58:46,483 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-10-14 19:58:46,483 INFO L175 Difference]: Start difference. First operand has 83 places, 72 transitions, 416 flow. Second operand 5 states and 84 transitions. [2024-10-14 19:58:46,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 76 transitions, 549 flow [2024-10-14 19:58:46,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 76 transitions, 518 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-10-14 19:58:46,489 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 409 flow [2024-10-14 19:58:46,489 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=409, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2024-10-14 19:58:46,490 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 36 predicate places. [2024-10-14 19:58:46,490 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 409 flow [2024-10-14 19:58:46,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 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 19:58:46,490 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:58:46,490 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 19:58:46,494 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 19:58:46,691 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 19:58:46,691 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:58:46,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:58:46,692 INFO L85 PathProgramCache]: Analyzing trace with hash -598349899, now seen corresponding path program 1 times [2024-10-14 19:58:46,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:58:46,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314150506] [2024-10-14 19:58:46,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:58:46,692 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 19:58:46,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:58:46,695 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 19:58:46,697 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 19:58:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:58:46,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:58:46,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:58:46,786 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 19:58:46,786 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:58:46,787 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:58:46,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314150506] [2024-10-14 19:58:46,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314150506] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:58:46,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:58:46,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:58:46,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879391978] [2024-10-14 19:58:46,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:58:46,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:58:46,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:58:46,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:58:46,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:58:46,790 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-10-14 19:58:46,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 409 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 19:58:46,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:58:46,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-10-14 19:58:46,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:58:47,015 INFO L124 PetriNetUnfolderBase]: 959/1839 cut-off events. [2024-10-14 19:58:47,015 INFO L125 PetriNetUnfolderBase]: For 1456/1464 co-relation queries the response was YES. [2024-10-14 19:58:47,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4668 conditions, 1839 events. 959/1839 cut-off events. For 1456/1464 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 10151 event pairs, 575 based on Foata normal form. 7/1714 useless extension candidates. Maximal degree in co-relation 4616. Up to 1131 conditions per place. [2024-10-14 19:58:47,028 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 76 selfloop transitions, 2 changer transitions 4/89 dead transitions. [2024-10-14 19:58:47,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 89 transitions, 670 flow [2024-10-14 19:58:47,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:58:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:58:47,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-10-14 19:58:47,029 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5271317829457365 [2024-10-14 19:58:47,029 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 409 flow. Second operand 3 states and 68 transitions. [2024-10-14 19:58:47,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 89 transitions, 670 flow [2024-10-14 19:58:47,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 89 transitions, 604 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 19:58:47,035 INFO L231 Difference]: Finished difference. Result has 76 places, 69 transitions, 370 flow [2024-10-14 19:58:47,036 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=370, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2024-10-14 19:58:47,036 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-10-14 19:58:47,036 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 370 flow [2024-10-14 19:58:47,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 19:58:47,037 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:58:47,037 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-10-14 19:58:47,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-10-14 19:58:47,237 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 19:58:47,238 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:58:47,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:58:47,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1450688974, now seen corresponding path program 3 times [2024-10-14 19:58:47,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:58:47,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138537257] [2024-10-14 19:58:47,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 19:58:47,239 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 19:58:47,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:58:47,240 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 19:58:47,243 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 19:58:47,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-14 19:58:47,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:58:47,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 19:58:47,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:58:47,463 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 19:58:48,162 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 19:58:48,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:58:50,297 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 19:58:50,297 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:58:50,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138537257] [2024-10-14 19:58:50,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138537257] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:58:50,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:58:50,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-10-14 19:58:50,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963261445] [2024-10-14 19:58:50,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:58:50,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 19:58:50,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:58:50,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 19:58:50,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-10-14 19:58:50,847 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-10-14 19:58:50,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 69 transitions, 370 flow. Second operand has 26 states, 26 states have (on average 10.76923076923077) internal successors, (280), 26 states have internal predecessors, (280), 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 19:58:50,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:58:50,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-10-14 19:58:50,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:04,393 INFO L124 PetriNetUnfolderBase]: 902/1738 cut-off events. [2024-10-14 19:59:04,393 INFO L125 PetriNetUnfolderBase]: For 1477/1485 co-relation queries the response was YES. [2024-10-14 19:59:04,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4362 conditions, 1738 events. 902/1738 cut-off events. For 1477/1485 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 9659 event pairs, 751 based on Foata normal form. 12/1624 useless extension candidates. Maximal degree in co-relation 4158. Up to 1514 conditions per place. [2024-10-14 19:59:04,401 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 33 selfloop transitions, 66 changer transitions 0/105 dead transitions. [2024-10-14 19:59:04,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 105 transitions, 796 flow [2024-10-14 19:59:04,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-14 19:59:04,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-10-14 19:59:04,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 515 transitions. [2024-10-14 19:59:04,405 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2603640040444894 [2024-10-14 19:59:04,405 INFO L175 Difference]: Start difference. First operand has 76 places, 69 transitions, 370 flow. Second operand 46 states and 515 transitions. [2024-10-14 19:59:04,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 105 transitions, 796 flow [2024-10-14 19:59:04,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 105 transitions, 794 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:59:04,412 INFO L231 Difference]: Finished difference. Result has 130 places, 105 transitions, 782 flow [2024-10-14 19:59:04,413 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=782, PETRI_PLACES=130, PETRI_TRANSITIONS=105} [2024-10-14 19:59:04,414 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-10-14 19:59:04,415 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 105 transitions, 782 flow [2024-10-14 19:59:04,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 10.76923076923077) internal successors, (280), 26 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:04,416 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:04,416 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 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] [2024-10-14 19:59:04,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2024-10-14 19:59:04,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:04,617 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:59:04,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:04,618 INFO L85 PathProgramCache]: Analyzing trace with hash 867559325, now seen corresponding path program 1 times [2024-10-14 19:59:04,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:04,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172328642] [2024-10-14 19:59:04,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:04,618 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:04,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:04,620 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:59:04,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-14 19:59:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:04,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 19:59:04,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:59:04,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:59:05,196 INFO L349 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2024-10-14 19:59:05,196 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 19:59:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:59:10,404 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:10,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172328642] [2024-10-14 19:59:10,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172328642] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:59:10,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:59:10,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-10-14 19:59:10,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698948770] [2024-10-14 19:59:10,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:59:10,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 19:59:10,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:10,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 19:59:10,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-14 19:59:10,406 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-10-14 19:59:10,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 105 transitions, 782 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:10,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:10,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-10-14 19:59:10,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:11,018 INFO L124 PetriNetUnfolderBase]: 1190/2245 cut-off events. [2024-10-14 19:59:11,018 INFO L125 PetriNetUnfolderBase]: For 1454/1462 co-relation queries the response was YES. [2024-10-14 19:59:11,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5727 conditions, 2245 events. 1190/2245 cut-off events. For 1454/1462 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 12612 event pairs, 264 based on Foata normal form. 3/2095 useless extension candidates. Maximal degree in co-relation 5645. Up to 546 conditions per place. [2024-10-14 19:59:11,031 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 134 selfloop transitions, 6 changer transitions 10/157 dead transitions. [2024-10-14 19:59:11,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 157 transitions, 1271 flow [2024-10-14 19:59:11,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:59:11,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:59:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-10-14 19:59:11,033 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5302325581395348 [2024-10-14 19:59:11,033 INFO L175 Difference]: Start difference. First operand has 130 places, 105 transitions, 782 flow. Second operand 5 states and 114 transitions. [2024-10-14 19:59:11,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 157 transitions, 1271 flow [2024-10-14 19:59:11,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 157 transitions, 1109 flow, removed 51 selfloop flow, removed 21 redundant places. [2024-10-14 19:59:11,043 INFO L231 Difference]: Finished difference. Result has 114 places, 106 transitions, 646 flow [2024-10-14 19:59:11,043 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=646, PETRI_PLACES=114, PETRI_TRANSITIONS=106} [2024-10-14 19:59:11,044 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-10-14 19:59:11,044 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 106 transitions, 646 flow [2024-10-14 19:59:11,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:11,044 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:11,044 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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 19:59:11,049 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 19:59:11,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:11,245 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:59:11,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:11,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1334719111, now seen corresponding path program 2 times [2024-10-14 19:59:11,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:11,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430231533] [2024-10-14 19:59:11,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:59:11,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:11,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:11,248 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:59:11,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-10-14 19:59:11,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:59:11,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:59:11,334 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 19:59:11,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:59:11,595 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:59:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:59:12,100 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:12,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430231533] [2024-10-14 19:59:12,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430231533] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:59:12,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:59:12,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-14 19:59:12,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165544476] [2024-10-14 19:59:12,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:59:12,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:59:12,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:12,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:59:12,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:59:12,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-10-14 19:59:12,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 106 transitions, 646 flow. Second operand has 14 states, 14 states have (on average 13.428571428571429) internal successors, (188), 14 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:12,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:12,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-10-14 19:59:12,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:13,124 INFO L124 PetriNetUnfolderBase]: 1813/3508 cut-off events. [2024-10-14 19:59:13,125 INFO L125 PetriNetUnfolderBase]: For 3363/3363 co-relation queries the response was YES. [2024-10-14 19:59:13,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8685 conditions, 3508 events. 1813/3508 cut-off events. For 3363/3363 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 20628 event pairs, 652 based on Foata normal form. 70/3357 useless extension candidates. Maximal degree in co-relation 8612. Up to 1017 conditions per place. [2024-10-14 19:59:13,144 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 115 selfloop transitions, 16 changer transitions 44/182 dead transitions. [2024-10-14 19:59:13,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 182 transitions, 1236 flow [2024-10-14 19:59:13,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 19:59:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 19:59:13,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-10-14 19:59:13,146 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4744186046511628 [2024-10-14 19:59:13,146 INFO L175 Difference]: Start difference. First operand has 114 places, 106 transitions, 646 flow. Second operand 10 states and 204 transitions. [2024-10-14 19:59:13,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 182 transitions, 1236 flow [2024-10-14 19:59:13,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 182 transitions, 1207 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-10-14 19:59:13,156 INFO L231 Difference]: Finished difference. Result has 124 places, 112 transitions, 744 flow [2024-10-14 19:59:13,156 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=744, PETRI_PLACES=124, PETRI_TRANSITIONS=112} [2024-10-14 19:59:13,157 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-10-14 19:59:13,157 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 112 transitions, 744 flow [2024-10-14 19:59:13,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.428571428571429) internal successors, (188), 14 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:13,157 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:13,157 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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] [2024-10-14 19:59:13,162 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 19:59:13,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:13,358 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:59:13,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:13,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1519553779, now seen corresponding path program 3 times [2024-10-14 19:59:13,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:13,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313566273] [2024-10-14 19:59:13,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 19:59:13,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:13,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:13,362 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:59:13,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-10-14 19:59:13,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 19:59:13,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:59:13,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:59:13,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 19:59:13,480 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:59:13,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:13,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313566273] [2024-10-14 19:59:13,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313566273] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:59:13,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:59:13,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:59:13,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081680879] [2024-10-14 19:59:13,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:59:13,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:59:13,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:13,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:59:13,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:59:13,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-10-14 19:59:13,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 112 transitions, 744 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:13,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:13,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-10-14 19:59:13,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:13,989 INFO L124 PetriNetUnfolderBase]: 3062/5341 cut-off events. [2024-10-14 19:59:13,989 INFO L125 PetriNetUnfolderBase]: For 5450/5450 co-relation queries the response was YES. [2024-10-14 19:59:14,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14183 conditions, 5341 events. 3062/5341 cut-off events. For 5450/5450 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 29717 event pairs, 586 based on Foata normal form. 286/5229 useless extension candidates. Maximal degree in co-relation 14147. Up to 2610 conditions per place. [2024-10-14 19:59:14,019 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 128 selfloop transitions, 4 changer transitions 3/138 dead transitions. [2024-10-14 19:59:14,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 138 transitions, 1137 flow [2024-10-14 19:59:14,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:59:14,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:59:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-10-14 19:59:14,020 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-10-14 19:59:14,020 INFO L175 Difference]: Start difference. First operand has 124 places, 112 transitions, 744 flow. Second operand 4 states and 76 transitions. [2024-10-14 19:59:14,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 138 transitions, 1137 flow [2024-10-14 19:59:14,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 138 transitions, 1105 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-10-14 19:59:14,034 INFO L231 Difference]: Finished difference. Result has 119 places, 113 transitions, 745 flow [2024-10-14 19:59:14,035 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=745, PETRI_PLACES=119, PETRI_TRANSITIONS=113} [2024-10-14 19:59:14,035 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-10-14 19:59:14,035 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 113 transitions, 745 flow [2024-10-14 19:59:14,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:14,036 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:14,036 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 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] [2024-10-14 19:59:14,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2024-10-14 19:59:14,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:14,237 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-14 19:59:14,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:14,237 INFO L85 PathProgramCache]: Analyzing trace with hash 96315505, now seen corresponding path program 1 times [2024-10-14 19:59:14,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:14,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017460199] [2024-10-14 19:59:14,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:14,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:14,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:14,239 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:59:14,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-10-14 19:59:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:14,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 19:59:14,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 19:59:15,395 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:59:28,581 INFO L349 Elim1Store]: treesize reduction 672, result has 23.7 percent of original size [2024-10-14 19:59:28,582 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