./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/chl-array-int-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d 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/chl-array-int-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:35:07,251 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:35:07,333 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 12:35:07,347 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:35:07,348 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:35:07,380 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:35:07,381 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:35:07,381 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:35:07,382 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:35:07,383 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:35:07,384 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:35:07,384 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:35:07,385 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:35:07,385 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:35:07,385 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:35:07,387 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:35:07,388 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:35:07,388 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:35:07,388 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:35:07,388 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:35:07,389 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:35:07,392 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:35:07,393 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:35:07,393 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:35:07,393 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:35:07,393 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:35:07,393 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:35:07,394 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:35:07,394 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:35:07,394 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:35:07,394 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:35:07,395 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:35:07,395 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:35:07,395 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:35:07,395 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:35:07,395 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:35:07,396 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 12:35:07,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 12:35:07,396 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:35:07,397 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:35:07,397 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:35:07,398 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:35:07,399 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2024-10-13 12:35:07,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:35:07,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:35:07,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:35:07,689 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:35:07,690 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:35:07,691 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-10-13 12:35:09,106 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:35:09,306 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:35:09,306 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-10-13 12:35:09,314 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0b9fa189/4728fc237d0944939a046e21e25bb3ab/FLAGd5c45cf14 [2024-10-13 12:35:09,326 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0b9fa189/4728fc237d0944939a046e21e25bb3ab [2024-10-13 12:35:09,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:35:09,329 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:35:09,333 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:35:09,333 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:35:09,338 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:35:09,339 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:35:09" (1/1) ... [2024-10-13 12:35:09,341 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a211091 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:09, skipping insertion in model container [2024-10-13 12:35:09,342 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:35:09" (1/1) ... [2024-10-13 12:35:09,363 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:35:09,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:35:09,583 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) [2024-10-13 12:35:09,584 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@62ce5b04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:09, skipping insertion in model container [2024-10-13 12:35:09,584 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:35:09,585 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-13 12:35:09,587 INFO L158 Benchmark]: Toolchain (without parser) took 256.35ms. Allocated memory is still 167.8MB. Free memory was 111.0MB in the beginning and 99.3MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-13 12:35:09,587 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 167.8MB. Free memory was 130.1MB in the beginning and 130.0MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-13 12:35:09,588 INFO L158 Benchmark]: CACSL2BoogieTranslator took 251.59ms. Allocated memory is still 167.8MB. Free memory was 110.6MB in the beginning and 99.3MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-13 12:35:09,590 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 167.8MB. Free memory was 130.1MB in the beginning and 130.0MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 251.59ms. Allocated memory is still 167.8MB. Free memory was 110.6MB in the beginning and 99.3MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: 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/chl-array-int-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:35:11,520 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:35:11,601 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-13 12:35:11,605 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:35:11,608 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:35:11,640 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:35:11,642 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:35:11,642 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:35:11,643 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:35:11,644 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:35:11,645 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:35:11,645 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:35:11,647 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:35:11,649 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:35:11,649 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:35:11,649 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:35:11,650 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:35:11,650 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:35:11,651 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:35:11,651 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:35:11,653 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:35:11,653 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:35:11,653 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:35:11,654 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:35:11,654 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:35:11,654 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-13 12:35:11,655 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:35:11,655 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-13 12:35:11,655 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:35:11,655 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:35:11,656 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:35:11,656 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:35:11,657 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:35:11,657 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:35:11,657 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:35:11,657 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:35:11,657 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:35:11,658 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:35:11,658 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-13 12:35:11,658 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-13 12:35:11,659 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:35:11,659 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:35:11,659 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:35:11,660 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:35:11,660 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-13 12:35:11,660 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2024-10-13 12:35:11,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:35:11,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:35:11,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:35:11,994 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:35:11,994 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:35:11,996 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-10-13 12:35:13,529 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:35:13,713 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:35:13,714 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-10-13 12:35:13,720 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbbdeebae/ad7fccc7deb64d14955b944129be8014/FLAGed951ff43 [2024-10-13 12:35:14,101 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbbdeebae/ad7fccc7deb64d14955b944129be8014 [2024-10-13 12:35:14,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:35:14,104 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:35:14,105 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:35:14,105 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:35:14,112 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:35:14,113 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:35:14" (1/1) ... [2024-10-13 12:35:14,114 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e54a120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:14, skipping insertion in model container [2024-10-13 12:35:14,114 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:35:14" (1/1) ... [2024-10-13 12:35:14,136 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:35:14,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:35:14,374 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-13 12:35:14,379 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:35:14,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:35:14,412 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 12:35:14,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:35:14,468 INFO L204 MainTranslator]: Completed translation [2024-10-13 12:35:14,469 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:14 WrapperNode [2024-10-13 12:35:14,469 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:35:14,470 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 12:35:14,470 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 12:35:14,470 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 12:35:14,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:14" (1/1) ... [2024-10-13 12:35:14,492 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:14" (1/1) ... [2024-10-13 12:35:14,525 INFO L138 Inliner]: procedures = 26, calls = 30, calls flagged for inlining = 14, calls inlined = 18, statements flattened = 189 [2024-10-13 12:35:14,528 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 12:35:14,529 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 12:35:14,529 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 12:35:14,529 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 12:35:14,539 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:14" (1/1) ... [2024-10-13 12:35:14,539 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:14" (1/1) ... [2024-10-13 12:35:14,545 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:14" (1/1) ... [2024-10-13 12:35:14,566 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-13 12:35:14,570 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:14" (1/1) ... [2024-10-13 12:35:14,570 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:14" (1/1) ... [2024-10-13 12:35:14,581 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:14" (1/1) ... [2024-10-13 12:35:14,587 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:14" (1/1) ... [2024-10-13 12:35:14,593 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:14" (1/1) ... [2024-10-13 12:35:14,595 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:14" (1/1) ... [2024-10-13 12:35:14,600 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 12:35:14,603 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 12:35:14,603 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 12:35:14,604 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 12:35:14,604 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:14" (1/1) ... [2024-10-13 12:35:14,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:35:14,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:35:14,638 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) [2024-10-13 12:35:14,659 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 [2024-10-13 12:35:14,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 12:35:14,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-13 12:35:14,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-13 12:35:14,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-13 12:35:14,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-13 12:35:14,709 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 12:35:14,710 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 12:35:14,711 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 12:35:14,711 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 12:35:14,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 12:35:14,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 12:35:14,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 12:35:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-13 12:35:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-13 12:35:14,713 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 12:35:14,857 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 12:35:14,860 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 12:35:15,402 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 12:35:15,402 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 12:35:15,702 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 12:35:15,703 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-13 12:35:15,704 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:35:15 BoogieIcfgContainer [2024-10-13 12:35:15,704 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 12:35:15,706 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 12:35:15,706 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 12:35:15,710 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 12:35:15,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:35:14" (1/3) ... [2024-10-13 12:35:15,711 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ccb276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:35:15, skipping insertion in model container [2024-10-13 12:35:15,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:35:14" (2/3) ... [2024-10-13 12:35:15,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10ccb276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:35:15, skipping insertion in model container [2024-10-13 12:35:15,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:35:15" (3/3) ... [2024-10-13 12:35:15,714 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2024-10-13 12:35:15,731 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 12:35:15,732 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-10-13 12:35:15,732 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 12:35:15,818 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 12:35:15,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 60 transitions, 134 flow [2024-10-13 12:35:15,887 INFO L124 PetriNetUnfolderBase]: 6/58 cut-off events. [2024-10-13 12:35:15,887 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 12:35:15,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 58 events. 6/58 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 162 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2024-10-13 12:35:15,891 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 60 transitions, 134 flow [2024-10-13 12:35:15,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 57 transitions, 126 flow [2024-10-13 12:35:15,908 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:35:15,916 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;@1bf1fe5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:35:15,917 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-10-13 12:35:15,920 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:35:15,921 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-13 12:35:15,921 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:35:15,921 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:15,922 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:35:15,922 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:35:15,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:15,928 INFO L85 PathProgramCache]: Analyzing trace with hash 631374, now seen corresponding path program 1 times [2024-10-13 12:35:15,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:15,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832940381] [2024-10-13 12:35:15,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:15,940 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 [2024-10-13 12:35:15,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:15,943 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) [2024-10-13 12:35:15,944 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 [2024-10-13 12:35:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:16,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 12:35:16,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:16,073 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 [2024-10-13 12:35:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:35:16,089 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:35:16,090 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:16,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832940381] [2024-10-13 12:35:16,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832940381] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:35:16,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:35:16,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:35:16,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032702366] [2024-10-13 12:35:16,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:35:16,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:35:16,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:16,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:35:16,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:35:16,203 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-10-13 12:35:16,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:16,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:16,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-10-13 12:35:16,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:16,389 INFO L124 PetriNetUnfolderBase]: 116/323 cut-off events. [2024-10-13 12:35:16,389 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-13 12:35:16,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 323 events. 116/323 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1678 event pairs, 68 based on Foata normal form. 1/215 useless extension candidates. Maximal degree in co-relation 476. Up to 183 conditions per place. [2024-10-13 12:35:16,397 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 24 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2024-10-13 12:35:16,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 53 transitions, 170 flow [2024-10-13 12:35:16,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:35:16,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:35:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2024-10-13 12:35:16,408 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-10-13 12:35:16,410 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 126 flow. Second operand 3 states and 119 transitions. [2024-10-13 12:35:16,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 53 transitions, 170 flow [2024-10-13 12:35:16,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 162 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 12:35:16,415 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 114 flow [2024-10-13 12:35:16,417 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2024-10-13 12:35:16,420 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -6 predicate places. [2024-10-13 12:35:16,420 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 114 flow [2024-10-13 12:35:16,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:16,422 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:16,422 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:35:16,425 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 [2024-10-13 12:35:16,622 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 [2024-10-13 12:35:16,623 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:35:16,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:16,623 INFO L85 PathProgramCache]: Analyzing trace with hash 631375, now seen corresponding path program 1 times [2024-10-13 12:35:16,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:16,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806862120] [2024-10-13 12:35:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:16,624 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 [2024-10-13 12:35:16,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:16,627 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) [2024-10-13 12:35:16,628 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 [2024-10-13 12:35:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:16,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 12:35:16,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:16,712 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 [2024-10-13 12:35:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:35:16,825 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:35:16,825 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:16,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806862120] [2024-10-13 12:35:16,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806862120] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:35:16,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:35:16,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:35:16,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593536461] [2024-10-13 12:35:16,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:35:16,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:35:16,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:16,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:35:16,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:35:17,075 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-10-13 12:35:17,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2024-10-13 12:35:17,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:17,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-10-13 12:35:17,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:17,340 INFO L124 PetriNetUnfolderBase]: 118/329 cut-off events. [2024-10-13 12:35:17,340 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-13 12:35:17,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537 conditions, 329 events. 118/329 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1699 event pairs, 68 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 501. Up to 192 conditions per place. [2024-10-13 12:35:17,344 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 27 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-10-13 12:35:17,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 196 flow [2024-10-13 12:35:17,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:35:17,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:35:17,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 156 transitions. [2024-10-13 12:35:17,347 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-10-13 12:35:17,347 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 114 flow. Second operand 4 states and 156 transitions. [2024-10-13 12:35:17,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 196 flow [2024-10-13 12:35:17,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:35:17,351 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 166 flow [2024-10-13 12:35:17,352 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2024-10-13 12:35:17,353 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -2 predicate places. [2024-10-13 12:35:17,353 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 166 flow [2024-10-13 12:35:17,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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) [2024-10-13 12:35:17,353 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:17,356 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-13 12:35:17,360 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 [2024-10-13 12:35:17,558 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 [2024-10-13 12:35:17,559 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:35:17,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:17,560 INFO L85 PathProgramCache]: Analyzing trace with hash 606771554, now seen corresponding path program 1 times [2024-10-13 12:35:17,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:17,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476905478] [2024-10-13 12:35:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:17,560 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 [2024-10-13 12:35:17,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:17,563 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) [2024-10-13 12:35:17,564 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 [2024-10-13 12:35:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:17,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 12:35:17,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:17,648 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 [2024-10-13 12:35:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:35:17,815 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:35:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:35:18,085 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:18,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476905478] [2024-10-13 12:35:18,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476905478] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:35:18,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:35:18,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-13 12:35:18,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37943196] [2024-10-13 12:35:18,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:35:18,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 12:35:18,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:18,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 12:35:18,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-13 12:35:18,963 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-10-13 12:35:18,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 166 flow. Second operand has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:18,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:18,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-10-13 12:35:18,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:19,990 INFO L124 PetriNetUnfolderBase]: 124/347 cut-off events. [2024-10-13 12:35:19,990 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-13 12:35:19,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 347 events. 124/347 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1816 event pairs, 68 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 512. Up to 195 conditions per place. [2024-10-13 12:35:19,995 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 27 selfloop transitions, 25 changer transitions 0/77 dead transitions. [2024-10-13 12:35:19,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 348 flow [2024-10-13 12:35:19,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 12:35:19,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-13 12:35:19,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 358 transitions. [2024-10-13 12:35:19,999 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5966666666666667 [2024-10-13 12:35:19,999 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 166 flow. Second operand 10 states and 358 transitions. [2024-10-13 12:35:20,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 348 flow [2024-10-13 12:35:20,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 348 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:35:20,004 INFO L231 Difference]: Finished difference. Result has 68 places, 77 transitions, 328 flow [2024-10-13 12:35:20,005 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=328, PETRI_PLACES=68, PETRI_TRANSITIONS=77} [2024-10-13 12:35:20,005 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 10 predicate places. [2024-10-13 12:35:20,005 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 77 transitions, 328 flow [2024-10-13 12:35:20,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:20,006 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:20,006 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:20,009 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 (4)] Forceful destruction successful, exit code 0 [2024-10-13 12:35:20,206 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 [2024-10-13 12:35:20,207 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:35:20,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:20,207 INFO L85 PathProgramCache]: Analyzing trace with hash -974384368, now seen corresponding path program 1 times [2024-10-13 12:35:20,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:20,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501903115] [2024-10-13 12:35:20,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:20,208 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 [2024-10-13 12:35:20,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:20,211 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) [2024-10-13 12:35:20,212 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 [2024-10-13 12:35:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:20,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 12:35:20,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:35:20,324 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:35:20,324 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:20,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501903115] [2024-10-13 12:35:20,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501903115] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:35:20,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:35:20,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:35:20,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792785995] [2024-10-13 12:35:20,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:35:20,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:35:20,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:20,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:35:20,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:35:20,382 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-13 12:35:20,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 77 transitions, 328 flow. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 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) [2024-10-13 12:35:20,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:20,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-13 12:35:20,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:20,604 INFO L124 PetriNetUnfolderBase]: 218/579 cut-off events. [2024-10-13 12:35:20,604 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2024-10-13 12:35:20,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1109 conditions, 579 events. 218/579 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3371 event pairs, 87 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 1021. Up to 241 conditions per place. [2024-10-13 12:35:20,608 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 87 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2024-10-13 12:35:20,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 117 transitions, 667 flow [2024-10-13 12:35:20,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:35:20,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:35:20,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 214 transitions. [2024-10-13 12:35:20,610 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7133333333333334 [2024-10-13 12:35:20,610 INFO L175 Difference]: Start difference. First operand has 68 places, 77 transitions, 328 flow. Second operand 5 states and 214 transitions. [2024-10-13 12:35:20,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 117 transitions, 667 flow [2024-10-13 12:35:20,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 117 transitions, 573 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-10-13 12:35:20,616 INFO L231 Difference]: Finished difference. Result has 70 places, 78 transitions, 281 flow [2024-10-13 12:35:20,616 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=281, PETRI_PLACES=70, PETRI_TRANSITIONS=78} [2024-10-13 12:35:20,617 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2024-10-13 12:35:20,617 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 78 transitions, 281 flow [2024-10-13 12:35:20,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 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) [2024-10-13 12:35:20,617 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:20,618 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:20,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2024-10-13 12:35:20,818 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 [2024-10-13 12:35:20,819 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:35:20,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:20,819 INFO L85 PathProgramCache]: Analyzing trace with hash -87652238, now seen corresponding path program 1 times [2024-10-13 12:35:20,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:20,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922018479] [2024-10-13 12:35:20,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:20,820 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 [2024-10-13 12:35:20,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:20,822 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) [2024-10-13 12:35:20,823 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 [2024-10-13 12:35:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:20,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 12:35:20,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:35:20,946 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:35:20,947 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:20,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922018479] [2024-10-13 12:35:20,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922018479] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:35:20,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:35:20,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:35:20,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222433664] [2024-10-13 12:35:20,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:35:20,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:35:20,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:20,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:35:20,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:35:21,027 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-13 12:35:21,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 78 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 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) [2024-10-13 12:35:21,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:21,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-13 12:35:21,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:21,201 INFO L124 PetriNetUnfolderBase]: 188/483 cut-off events. [2024-10-13 12:35:21,202 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-10-13 12:35:21,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 483 events. 188/483 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2567 event pairs, 91 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 888. Up to 239 conditions per place. [2024-10-13 12:35:21,205 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 80 selfloop transitions, 4 changer transitions 0/110 dead transitions. [2024-10-13 12:35:21,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 110 transitions, 564 flow [2024-10-13 12:35:21,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:35:21,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:35:21,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 207 transitions. [2024-10-13 12:35:21,207 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.69 [2024-10-13 12:35:21,207 INFO L175 Difference]: Start difference. First operand has 70 places, 78 transitions, 281 flow. Second operand 5 states and 207 transitions. [2024-10-13 12:35:21,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 110 transitions, 564 flow [2024-10-13 12:35:21,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 110 transitions, 560 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 12:35:21,215 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 294 flow [2024-10-13 12:35:21,215 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-10-13 12:35:21,216 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 17 predicate places. [2024-10-13 12:35:21,217 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 294 flow [2024-10-13 12:35:21,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 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) [2024-10-13 12:35:21,217 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:21,217 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:21,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2024-10-13 12:35:21,418 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 [2024-10-13 12:35:21,418 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:35:21,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:21,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1942309027, now seen corresponding path program 1 times [2024-10-13 12:35:21,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:21,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061708703] [2024-10-13 12:35:21,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:21,419 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 [2024-10-13 12:35:21,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:21,422 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) [2024-10-13 12:35:21,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-13 12:35:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:21,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 12:35:21,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:35:21,531 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:35:21,531 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:21,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061708703] [2024-10-13 12:35:21,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061708703] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:35:21,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:35:21,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 12:35:21,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888395974] [2024-10-13 12:35:21,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:35:21,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:35:21,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:21,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:35:21,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:35:21,585 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-13 12:35:21,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 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) [2024-10-13 12:35:21,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:21,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-13 12:35:21,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:21,791 INFO L124 PetriNetUnfolderBase]: 300/779 cut-off events. [2024-10-13 12:35:21,792 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-10-13 12:35:21,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 779 events. 300/779 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4703 event pairs, 132 based on Foata normal form. 12/616 useless extension candidates. Maximal degree in co-relation 1524. Up to 338 conditions per place. [2024-10-13 12:35:21,796 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 72 selfloop transitions, 9 changer transitions 0/107 dead transitions. [2024-10-13 12:35:21,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 107 transitions, 535 flow [2024-10-13 12:35:21,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:35:21,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:35:21,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 211 transitions. [2024-10-13 12:35:21,798 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7033333333333334 [2024-10-13 12:35:21,798 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 294 flow. Second operand 5 states and 211 transitions. [2024-10-13 12:35:21,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 107 transitions, 535 flow [2024-10-13 12:35:21,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 107 transitions, 522 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:35:21,802 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 320 flow [2024-10-13 12:35:21,802 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-10-13 12:35:21,802 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2024-10-13 12:35:21,803 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 320 flow [2024-10-13 12:35:21,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 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) [2024-10-13 12:35:21,803 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:21,803 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:21,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2024-10-13 12:35:22,007 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 [2024-10-13 12:35:22,008 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:35:22,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:22,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1758943930, now seen corresponding path program 1 times [2024-10-13 12:35:22,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:22,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708441691] [2024-10-13 12:35:22,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:22,009 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 [2024-10-13 12:35:22,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:22,012 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) [2024-10-13 12:35:22,013 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 [2024-10-13 12:35:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:22,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 12:35:22,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:35:22,157 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:35:22,158 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:22,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708441691] [2024-10-13 12:35:22,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708441691] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:35:22,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:35:22,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-13 12:35:22,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909135960] [2024-10-13 12:35:22,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:35:22,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:35:22,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:22,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:35:22,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:35:22,221 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-13 12:35:22,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 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) [2024-10-13 12:35:22,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:22,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-13 12:35:22,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:22,428 INFO L124 PetriNetUnfolderBase]: 270/685 cut-off events. [2024-10-13 12:35:22,428 INFO L125 PetriNetUnfolderBase]: For 353/353 co-relation queries the response was YES. [2024-10-13 12:35:22,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1527 conditions, 685 events. 270/685 cut-off events. For 353/353 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3815 event pairs, 142 based on Foata normal form. 9/557 useless extension candidates. Maximal degree in co-relation 1446. Up to 336 conditions per place. [2024-10-13 12:35:22,432 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 65 selfloop transitions, 9 changer transitions 0/100 dead transitions. [2024-10-13 12:35:22,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 100 transitions, 531 flow [2024-10-13 12:35:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:35:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:35:22,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 204 transitions. [2024-10-13 12:35:22,433 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-10-13 12:35:22,434 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 320 flow. Second operand 5 states and 204 transitions. [2024-10-13 12:35:22,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 100 transitions, 531 flow [2024-10-13 12:35:22,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 100 transitions, 525 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:35:22,437 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 353 flow [2024-10-13 12:35:22,437 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=353, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2024-10-13 12:35:22,438 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 25 predicate places. [2024-10-13 12:35:22,438 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 353 flow [2024-10-13 12:35:22,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 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) [2024-10-13 12:35:22,438 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:22,438 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:22,444 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 (8)] Forceful destruction successful, exit code 0 [2024-10-13 12:35:22,639 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 [2024-10-13 12:35:22,640 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:35:22,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:22,640 INFO L85 PathProgramCache]: Analyzing trace with hash -219840755, now seen corresponding path program 1 times [2024-10-13 12:35:22,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:22,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706809209] [2024-10-13 12:35:22,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:22,641 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 [2024-10-13 12:35:22,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:22,644 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) [2024-10-13 12:35:22,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-13 12:35:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:22,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 12:35:22,738 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:22,742 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 [2024-10-13 12:35:22,788 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-13 12:35:22,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-10-13 12:35:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 12:35:22,812 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:35:22,812 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:22,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706809209] [2024-10-13 12:35:22,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706809209] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:35:22,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:35:22,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:35:22,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504306438] [2024-10-13 12:35:22,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:35:22,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:35:22,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:22,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:35:22,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:35:22,884 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-10-13 12:35:22,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 353 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:22,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:22,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-10-13 12:35:22,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:23,048 INFO L124 PetriNetUnfolderBase]: 314/759 cut-off events. [2024-10-13 12:35:23,048 INFO L125 PetriNetUnfolderBase]: For 531/531 co-relation queries the response was YES. [2024-10-13 12:35:23,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1761 conditions, 759 events. 314/759 cut-off events. For 531/531 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4229 event pairs, 244 based on Foata normal form. 0/651 useless extension candidates. Maximal degree in co-relation 1677. Up to 556 conditions per place. [2024-10-13 12:35:23,053 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 48 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-10-13 12:35:23,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 79 transitions, 463 flow [2024-10-13 12:35:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:35:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:35:23,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-10-13 12:35:23,055 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-10-13 12:35:23,056 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 353 flow. Second operand 5 states and 148 transitions. [2024-10-13 12:35:23,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 79 transitions, 463 flow [2024-10-13 12:35:23,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 450 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:35:23,059 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 354 flow [2024-10-13 12:35:23,059 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=354, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-10-13 12:35:23,060 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 23 predicate places. [2024-10-13 12:35:23,060 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 354 flow [2024-10-13 12:35:23,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:23,060 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:23,060 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:23,065 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 [2024-10-13 12:35:23,263 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 [2024-10-13 12:35:23,264 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:35:23,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:23,265 INFO L85 PathProgramCache]: Analyzing trace with hash -219840754, now seen corresponding path program 1 times [2024-10-13 12:35:23,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:23,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940811127] [2024-10-13 12:35:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:23,267 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 [2024-10-13 12:35:23,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:23,270 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) [2024-10-13 12:35:23,272 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 [2024-10-13 12:35:23,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:23,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-13 12:35:23,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:23,392 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 [2024-10-13 12:35:23,400 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 [2024-10-13 12:35:23,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:35:23,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-13 12:35:23,530 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-13 12:35:23,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-13 12:35:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:35:23,719 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:35:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:35:24,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:24,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940811127] [2024-10-13 12:35:24,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940811127] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:35:24,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:35:24,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-13 12:35:24,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605107794] [2024-10-13 12:35:24,220 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:35:24,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 12:35:24,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:24,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 12:35:24,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-13 12:35:26,132 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-13 12:35:26,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 354 flow. Second operand has 12 states, 12 states have (on average 25.666666666666668) internal successors, (308), 12 states have internal predecessors, (308), 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) [2024-10-13 12:35:26,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:26,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-13 12:35:26,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:28,431 INFO L124 PetriNetUnfolderBase]: 1000/2302 cut-off events. [2024-10-13 12:35:28,432 INFO L125 PetriNetUnfolderBase]: For 1053/1053 co-relation queries the response was YES. [2024-10-13 12:35:28,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4983 conditions, 2302 events. 1000/2302 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16331 event pairs, 336 based on Foata normal form. 0/1853 useless extension candidates. Maximal degree in co-relation 3609. Up to 450 conditions per place. [2024-10-13 12:35:28,445 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 147 selfloop transitions, 56 changer transitions 0/220 dead transitions. [2024-10-13 12:35:28,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 220 transitions, 1258 flow [2024-10-13 12:35:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-13 12:35:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-13 12:35:28,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 745 transitions. [2024-10-13 12:35:28,450 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5398550724637681 [2024-10-13 12:35:28,450 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 354 flow. Second operand 23 states and 745 transitions. [2024-10-13 12:35:28,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 220 transitions, 1258 flow [2024-10-13 12:35:28,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 220 transitions, 1231 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:35:28,458 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 630 flow [2024-10-13 12:35:28,458 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=630, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-10-13 12:35:28,459 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 43 predicate places. [2024-10-13 12:35:28,460 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 630 flow [2024-10-13 12:35:28,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 25.666666666666668) internal successors, (308), 12 states have internal predecessors, (308), 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) [2024-10-13 12:35:28,460 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:28,461 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-13 12:35:28,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-10-13 12:35:28,661 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 [2024-10-13 12:35:28,661 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:35:28,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:28,662 INFO L85 PathProgramCache]: Analyzing trace with hash 237333019, now seen corresponding path program 2 times [2024-10-13 12:35:28,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:28,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200816714] [2024-10-13 12:35:28,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:35:28,662 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 [2024-10-13 12:35:28,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:28,665 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) [2024-10-13 12:35:28,667 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 [2024-10-13 12:35:28,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 12:35:28,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:35:28,731 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 12:35:28,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:28,744 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 [2024-10-13 12:35:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:35:28,960 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:35:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:35:29,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:29,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200816714] [2024-10-13 12:35:29,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200816714] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:35:29,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:35:29,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-13 12:35:29,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791144507] [2024-10-13 12:35:29,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:35:29,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 12:35:29,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:29,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 12:35:29,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:35:31,077 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-10-13 12:35:31,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 630 flow. Second operand has 14 states, 14 states have (on average 31.571428571428573) internal successors, (442), 14 states have internal predecessors, (442), 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) [2024-10-13 12:35:31,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:31,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-10-13 12:35:31,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:33,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-13 12:35:34,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-13 12:35:41,249 INFO L124 PetriNetUnfolderBase]: 821/2103 cut-off events. [2024-10-13 12:35:41,249 INFO L125 PetriNetUnfolderBase]: For 1696/1698 co-relation queries the response was YES. [2024-10-13 12:35:41,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4998 conditions, 2103 events. 821/2103 cut-off events. For 1696/1698 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15533 event pairs, 595 based on Foata normal form. 30/1791 useless extension candidates. Maximal degree in co-relation 3878. Up to 1417 conditions per place. [2024-10-13 12:35:41,261 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 44 selfloop transitions, 103 changer transitions 0/171 dead transitions. [2024-10-13 12:35:41,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 171 transitions, 1332 flow [2024-10-13 12:35:41,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-13 12:35:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-13 12:35:41,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 760 transitions. [2024-10-13 12:35:41,265 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-10-13 12:35:41,265 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 630 flow. Second operand 22 states and 760 transitions. [2024-10-13 12:35:41,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 171 transitions, 1332 flow [2024-10-13 12:35:41,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 171 transitions, 1298 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-10-13 12:35:41,309 INFO L231 Difference]: Finished difference. Result has 126 places, 171 transitions, 1300 flow [2024-10-13 12:35:41,309 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1300, PETRI_PLACES=126, PETRI_TRANSITIONS=171} [2024-10-13 12:35:41,311 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 68 predicate places. [2024-10-13 12:35:41,312 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 171 transitions, 1300 flow [2024-10-13 12:35:41,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 31.571428571428573) internal successors, (442), 14 states have internal predecessors, (442), 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) [2024-10-13 12:35:41,312 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:41,312 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:41,317 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 [2024-10-13 12:35:41,513 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 [2024-10-13 12:35:41,513 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:35:41,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:41,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1774871804, now seen corresponding path program 1 times [2024-10-13 12:35:41,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:41,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932168857] [2024-10-13 12:35:41,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:41,514 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 [2024-10-13 12:35:41,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:41,515 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) [2024-10-13 12:35:41,516 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 [2024-10-13 12:35:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:41,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 12:35:41,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:35:41,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:35:41,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2024-10-13 12:35:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:35:41,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:41,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932168857] [2024-10-13 12:35:41,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932168857] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:35:41,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:35:41,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-13 12:35:41,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839019205] [2024-10-13 12:35:41,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:35:41,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 12:35:41,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:41,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 12:35:41,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-13 12:35:42,690 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-10-13 12:35:42,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 171 transitions, 1300 flow. Second operand has 10 states, 10 states have (on average 30.7) internal successors, (307), 10 states have internal predecessors, (307), 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) [2024-10-13 12:35:42,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:42,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-10-13 12:35:42,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:43,515 INFO L124 PetriNetUnfolderBase]: 1181/2671 cut-off events. [2024-10-13 12:35:43,516 INFO L125 PetriNetUnfolderBase]: For 1578/1578 co-relation queries the response was YES. [2024-10-13 12:35:43,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6487 conditions, 2671 events. 1181/2671 cut-off events. For 1578/1578 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 18638 event pairs, 380 based on Foata normal form. 0/2405 useless extension candidates. Maximal degree in co-relation 6267. Up to 678 conditions per place. [2024-10-13 12:35:43,533 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 142 selfloop transitions, 49 changer transitions 0/214 dead transitions. [2024-10-13 12:35:43,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 214 transitions, 1797 flow [2024-10-13 12:35:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:35:43,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:35:43,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 319 transitions. [2024-10-13 12:35:43,535 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6645833333333333 [2024-10-13 12:35:43,535 INFO L175 Difference]: Start difference. First operand has 126 places, 171 transitions, 1300 flow. Second operand 8 states and 319 transitions. [2024-10-13 12:35:43,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 214 transitions, 1797 flow [2024-10-13 12:35:43,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 214 transitions, 1525 flow, removed 87 selfloop flow, removed 9 redundant places. [2024-10-13 12:35:43,550 INFO L231 Difference]: Finished difference. Result has 125 places, 173 transitions, 1173 flow [2024-10-13 12:35:43,551 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1173, PETRI_PLACES=125, PETRI_TRANSITIONS=173} [2024-10-13 12:35:43,551 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 67 predicate places. [2024-10-13 12:35:43,551 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 173 transitions, 1173 flow [2024-10-13 12:35:43,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.7) internal successors, (307), 10 states have internal predecessors, (307), 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) [2024-10-13 12:35:43,552 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:43,552 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:43,558 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 [2024-10-13 12:35:43,755 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 [2024-10-13 12:35:43,756 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:35:43,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:43,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1774871803, now seen corresponding path program 1 times [2024-10-13 12:35:43,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:43,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732684942] [2024-10-13 12:35:43,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:43,757 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 [2024-10-13 12:35:43,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:43,758 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) [2024-10-13 12:35:43,759 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 [2024-10-13 12:35:43,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:43,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 12:35:43,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:43,835 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 [2024-10-13 12:35:43,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 12:35:43,858 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:35:43,860 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:43,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732684942] [2024-10-13 12:35:43,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732684942] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:35:43,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:35:43,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:35:43,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805346577] [2024-10-13 12:35:43,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:35:43,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:35:43,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:43,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:35:43,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:35:43,959 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-10-13 12:35:43,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 173 transitions, 1173 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:43,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:43,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-10-13 12:35:43,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:44,433 INFO L124 PetriNetUnfolderBase]: 1398/3040 cut-off events. [2024-10-13 12:35:44,433 INFO L125 PetriNetUnfolderBase]: For 2578/2578 co-relation queries the response was YES. [2024-10-13 12:35:44,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7661 conditions, 3040 events. 1398/3040 cut-off events. For 2578/2578 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 20925 event pairs, 1086 based on Foata normal form. 82/2976 useless extension candidates. Maximal degree in co-relation 7464. Up to 2370 conditions per place. [2024-10-13 12:35:44,457 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 131 selfloop transitions, 20 changer transitions 0/169 dead transitions. [2024-10-13 12:35:44,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 169 transitions, 1467 flow [2024-10-13 12:35:44,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:35:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:35:44,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-10-13 12:35:44,459 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-10-13 12:35:44,459 INFO L175 Difference]: Start difference. First operand has 125 places, 173 transitions, 1173 flow. Second operand 4 states and 125 transitions. [2024-10-13 12:35:44,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 169 transitions, 1467 flow [2024-10-13 12:35:44,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 169 transitions, 1418 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-13 12:35:44,471 INFO L231 Difference]: Finished difference. Result has 120 places, 169 transitions, 1156 flow [2024-10-13 12:35:44,471 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1156, PETRI_PLACES=120, PETRI_TRANSITIONS=169} [2024-10-13 12:35:44,472 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 62 predicate places. [2024-10-13 12:35:44,472 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 169 transitions, 1156 flow [2024-10-13 12:35:44,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:35:44,472 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:44,473 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:44,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2024-10-13 12:35:44,673 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 [2024-10-13 12:35:44,673 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:35:44,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:44,674 INFO L85 PathProgramCache]: Analyzing trace with hash -820713168, now seen corresponding path program 1 times [2024-10-13 12:35:44,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:44,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307419806] [2024-10-13 12:35:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:44,674 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:44,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:44,677 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) [2024-10-13 12:35:44,678 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 [2024-10-13 12:35:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:44,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-13 12:35:44,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:44,792 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 [2024-10-13 12:35:44,800 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 [2024-10-13 12:35:44,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:35:44,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-13 12:35:44,925 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-13 12:35:44,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-13 12:35:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:35:45,067 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:35:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:35:45,525 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:45,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307419806] [2024-10-13 12:35:45,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307419806] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:35:45,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:35:45,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-13 12:35:45,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811777457] [2024-10-13 12:35:45,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:35:45,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 12:35:45,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:45,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 12:35:45,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-13 12:35:47,193 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-10-13 12:35:47,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 169 transitions, 1156 flow. Second operand has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 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) [2024-10-13 12:35:47,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:47,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-10-13 12:35:47,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:49,351 INFO L124 PetriNetUnfolderBase]: 1684/3709 cut-off events. [2024-10-13 12:35:49,351 INFO L125 PetriNetUnfolderBase]: For 2993/3075 co-relation queries the response was YES. [2024-10-13 12:35:49,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8855 conditions, 3709 events. 1684/3709 cut-off events. For 2993/3075 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 27445 event pairs, 676 based on Foata normal form. 0/3264 useless extension candidates. Maximal degree in co-relation 8651. Up to 737 conditions per place. [2024-10-13 12:35:49,373 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 160 selfloop transitions, 110 changer transitions 0/287 dead transitions. [2024-10-13 12:35:49,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 287 transitions, 2227 flow [2024-10-13 12:35:49,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-13 12:35:49,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-13 12:35:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 756 transitions. [2024-10-13 12:35:49,377 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5478260869565217 [2024-10-13 12:35:49,377 INFO L175 Difference]: Start difference. First operand has 120 places, 169 transitions, 1156 flow. Second operand 23 states and 756 transitions. [2024-10-13 12:35:49,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 287 transitions, 2227 flow [2024-10-13 12:35:49,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 287 transitions, 2192 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:35:49,392 INFO L231 Difference]: Finished difference. Result has 141 places, 179 transitions, 1414 flow [2024-10-13 12:35:49,394 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1414, PETRI_PLACES=141, PETRI_TRANSITIONS=179} [2024-10-13 12:35:49,394 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 83 predicate places. [2024-10-13 12:35:49,394 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 179 transitions, 1414 flow [2024-10-13 12:35:49,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 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) [2024-10-13 12:35:49,395 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:49,395 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:49,399 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 [2024-10-13 12:35:49,595 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 [2024-10-13 12:35:49,595 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:35:49,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:49,596 INFO L85 PathProgramCache]: Analyzing trace with hash 327696172, now seen corresponding path program 1 times [2024-10-13 12:35:49,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:49,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221854519] [2024-10-13 12:35:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:49,596 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 [2024-10-13 12:35:49,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:49,598 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) [2024-10-13 12:35:49,599 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 [2024-10-13 12:35:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:49,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 12:35:49,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:49,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:35:49,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:35:49,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2024-10-13 12:35:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:35:49,948 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:49,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221854519] [2024-10-13 12:35:49,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221854519] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:35:49,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:35:49,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-13 12:35:49,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853783069] [2024-10-13 12:35:49,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:35:49,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 12:35:49,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:49,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 12:35:49,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-13 12:35:50,588 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-10-13 12:35:50,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 179 transitions, 1414 flow. Second operand has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 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) [2024-10-13 12:35:50,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:50,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-10-13 12:35:50,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:51,544 INFO L124 PetriNetUnfolderBase]: 2375/4771 cut-off events. [2024-10-13 12:35:51,545 INFO L125 PetriNetUnfolderBase]: For 4578/4712 co-relation queries the response was YES. [2024-10-13 12:35:51,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12300 conditions, 4771 events. 2375/4771 cut-off events. For 4578/4712 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 34144 event pairs, 709 based on Foata normal form. 0/4651 useless extension candidates. Maximal degree in co-relation 12078. Up to 1480 conditions per place. [2024-10-13 12:35:51,570 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 163 selfloop transitions, 49 changer transitions 0/233 dead transitions. [2024-10-13 12:35:51,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 233 transitions, 2083 flow [2024-10-13 12:35:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:35:51,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:35:51,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 309 transitions. [2024-10-13 12:35:51,572 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-10-13 12:35:51,572 INFO L175 Difference]: Start difference. First operand has 141 places, 179 transitions, 1414 flow. Second operand 8 states and 309 transitions. [2024-10-13 12:35:51,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 233 transitions, 2083 flow [2024-10-13 12:35:51,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 233 transitions, 1957 flow, removed 4 selfloop flow, removed 15 redundant places. [2024-10-13 12:35:51,591 INFO L231 Difference]: Finished difference. Result has 134 places, 181 transitions, 1433 flow [2024-10-13 12:35:51,591 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1433, PETRI_PLACES=134, PETRI_TRANSITIONS=181} [2024-10-13 12:35:51,592 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 76 predicate places. [2024-10-13 12:35:51,592 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 181 transitions, 1433 flow [2024-10-13 12:35:51,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 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) [2024-10-13 12:35:51,592 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:51,592 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:51,598 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 [2024-10-13 12:35:51,793 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 [2024-10-13 12:35:51,793 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:35:51,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:51,794 INFO L85 PathProgramCache]: Analyzing trace with hash -135882540, now seen corresponding path program 1 times [2024-10-13 12:35:51,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:51,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46509618] [2024-10-13 12:35:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:51,794 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 [2024-10-13 12:35:51,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:51,797 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) [2024-10-13 12:35:51,798 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 [2024-10-13 12:35:51,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:51,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 12:35:51,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:35:52,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:35:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:35:52,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:52,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46509618] [2024-10-13 12:35:52,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46509618] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:35:52,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:35:52,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-13 12:35:52,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572522290] [2024-10-13 12:35:52,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:35:52,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 12:35:52,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:52,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 12:35:52,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:35:52,513 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-13 12:35:52,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 181 transitions, 1433 flow. Second operand has 14 states, 14 states have (on average 32.714285714285715) internal successors, (458), 14 states have internal predecessors, (458), 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) [2024-10-13 12:35:52,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:52,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-13 12:35:52,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:53,245 INFO L124 PetriNetUnfolderBase]: 1826/4126 cut-off events. [2024-10-13 12:35:53,245 INFO L125 PetriNetUnfolderBase]: For 5171/5259 co-relation queries the response was YES. [2024-10-13 12:35:53,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11183 conditions, 4126 events. 1826/4126 cut-off events. For 5171/5259 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 30860 event pairs, 1145 based on Foata normal form. 24/4080 useless extension candidates. Maximal degree in co-relation 10964. Up to 2317 conditions per place. [2024-10-13 12:35:53,267 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 189 selfloop transitions, 70 changer transitions 0/282 dead transitions. [2024-10-13 12:35:53,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 282 transitions, 2551 flow [2024-10-13 12:35:53,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 12:35:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 12:35:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 443 transitions. [2024-10-13 12:35:53,270 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6712121212121213 [2024-10-13 12:35:53,270 INFO L175 Difference]: Start difference. First operand has 134 places, 181 transitions, 1433 flow. Second operand 11 states and 443 transitions. [2024-10-13 12:35:53,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 282 transitions, 2551 flow [2024-10-13 12:35:53,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 282 transitions, 2444 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-10-13 12:35:53,289 INFO L231 Difference]: Finished difference. Result has 141 places, 201 transitions, 1816 flow [2024-10-13 12:35:53,290 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1816, PETRI_PLACES=141, PETRI_TRANSITIONS=201} [2024-10-13 12:35:53,290 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 83 predicate places. [2024-10-13 12:35:53,290 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 201 transitions, 1816 flow [2024-10-13 12:35:53,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 32.714285714285715) internal successors, (458), 14 states have internal predecessors, (458), 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) [2024-10-13 12:35:53,292 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:53,292 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:53,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2024-10-13 12:35:53,492 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 [2024-10-13 12:35:53,492 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:35:53,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:53,493 INFO L85 PathProgramCache]: Analyzing trace with hash -63400330, now seen corresponding path program 1 times [2024-10-13 12:35:53,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:53,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191726523] [2024-10-13 12:35:53,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:53,493 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 [2024-10-13 12:35:53,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:53,496 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) [2024-10-13 12:35:53,497 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 [2024-10-13 12:35:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:53,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 12:35:53,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:35:53,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:35:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:35:53,795 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:53,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191726523] [2024-10-13 12:35:53,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191726523] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:35:53,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:35:53,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-13 12:35:53,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143726096] [2024-10-13 12:35:53,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:35:53,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 12:35:53,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:53,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 12:35:53,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:35:54,095 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-13 12:35:54,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 201 transitions, 1816 flow. Second operand has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 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) [2024-10-13 12:35:54,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:54,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-13 12:35:54,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:54,910 INFO L124 PetriNetUnfolderBase]: 1725/3757 cut-off events. [2024-10-13 12:35:54,910 INFO L125 PetriNetUnfolderBase]: For 4647/4739 co-relation queries the response was YES. [2024-10-13 12:35:54,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10343 conditions, 3757 events. 1725/3757 cut-off events. For 4647/4739 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 26795 event pairs, 1180 based on Foata normal form. 18/3696 useless extension candidates. Maximal degree in co-relation 10096. Up to 2329 conditions per place. [2024-10-13 12:35:54,936 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 182 selfloop transitions, 70 changer transitions 0/274 dead transitions. [2024-10-13 12:35:54,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 274 transitions, 2725 flow [2024-10-13 12:35:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 12:35:54,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 12:35:54,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 439 transitions. [2024-10-13 12:35:54,938 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6651515151515152 [2024-10-13 12:35:54,938 INFO L175 Difference]: Start difference. First operand has 141 places, 201 transitions, 1816 flow. Second operand 11 states and 439 transitions. [2024-10-13 12:35:54,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 274 transitions, 2725 flow [2024-10-13 12:35:54,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 274 transitions, 2709 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:35:54,959 INFO L231 Difference]: Finished difference. Result has 148 places, 199 transitions, 1939 flow [2024-10-13 12:35:54,959 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1939, PETRI_PLACES=148, PETRI_TRANSITIONS=199} [2024-10-13 12:35:54,959 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 90 predicate places. [2024-10-13 12:35:54,960 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 199 transitions, 1939 flow [2024-10-13 12:35:54,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 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) [2024-10-13 12:35:54,961 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:54,961 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:54,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2024-10-13 12:35:55,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:55,162 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:35:55,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:55,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1414938719, now seen corresponding path program 1 times [2024-10-13 12:35:55,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:55,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60601465] [2024-10-13 12:35:55,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:35:55,163 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 [2024-10-13 12:35:55,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:55,164 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:35:55,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-10-13 12:35:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:35:55,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-13 12:35:55,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:35:55,479 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:35:55,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:55,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60601465] [2024-10-13 12:35:55,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60601465] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:35:55,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:35:55,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-13 12:35:55,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037923069] [2024-10-13 12:35:55,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:35:55,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 12:35:55,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:55,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 12:35:55,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-13 12:35:55,569 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2024-10-13 12:35:55,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 199 transitions, 1939 flow. Second operand has 7 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 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) [2024-10-13 12:35:55,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:55,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2024-10-13 12:35:55,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:56,251 INFO L124 PetriNetUnfolderBase]: 1537/3597 cut-off events. [2024-10-13 12:35:56,251 INFO L125 PetriNetUnfolderBase]: For 4809/4891 co-relation queries the response was YES. [2024-10-13 12:35:56,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10036 conditions, 3597 events. 1537/3597 cut-off events. For 4809/4891 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 26690 event pairs, 722 based on Foata normal form. 1/3546 useless extension candidates. Maximal degree in co-relation 9775. Up to 2535 conditions per place. [2024-10-13 12:35:56,269 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 173 selfloop transitions, 18 changer transitions 13/227 dead transitions. [2024-10-13 12:35:56,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 227 transitions, 2524 flow [2024-10-13 12:35:56,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:35:56,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:35:56,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 242 transitions. [2024-10-13 12:35:56,270 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6722222222222223 [2024-10-13 12:35:56,270 INFO L175 Difference]: Start difference. First operand has 148 places, 199 transitions, 1939 flow. Second operand 6 states and 242 transitions. [2024-10-13 12:35:56,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 227 transitions, 2524 flow [2024-10-13 12:35:56,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 227 transitions, 2387 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-13 12:35:56,290 INFO L231 Difference]: Finished difference. Result has 149 places, 211 transitions, 2003 flow [2024-10-13 12:35:56,290 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1805, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2003, PETRI_PLACES=149, PETRI_TRANSITIONS=211} [2024-10-13 12:35:56,291 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 91 predicate places. [2024-10-13 12:35:56,291 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 211 transitions, 2003 flow [2024-10-13 12:35:56,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 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) [2024-10-13 12:35:56,291 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:56,292 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:56,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2024-10-13 12:35:56,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:56,492 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:35:56,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:56,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1139089671, now seen corresponding path program 2 times [2024-10-13 12:35:56,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:56,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565012757] [2024-10-13 12:35:56,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:35:56,493 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 [2024-10-13 12:35:56,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:56,496 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:35:56,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2024-10-13 12:35:56,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-13 12:35:56,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:35:56,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-13 12:35:56,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:56,574 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 [2024-10-13 12:35:56,577 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 [2024-10-13 12:35:56,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:35:56,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-13 12:35:56,672 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-13 12:35:56,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-13 12:35:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-13 12:35:56,776 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:35:56,776 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:56,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565012757] [2024-10-13 12:35:56,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [565012757] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:35:56,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:35:56,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:35:56,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981690338] [2024-10-13 12:35:56,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:35:56,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 12:35:56,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:56,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 12:35:56,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-13 12:35:57,122 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-13 12:35:57,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 211 transitions, 2003 flow. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 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) [2024-10-13 12:35:57,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:35:57,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-13 12:35:57,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:35:57,773 INFO L124 PetriNetUnfolderBase]: 2717/5452 cut-off events. [2024-10-13 12:35:57,773 INFO L125 PetriNetUnfolderBase]: For 8218/8327 co-relation queries the response was YES. [2024-10-13 12:35:57,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15469 conditions, 5452 events. 2717/5452 cut-off events. For 8218/8327 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 39156 event pairs, 1138 based on Foata normal form. 32/5462 useless extension candidates. Maximal degree in co-relation 15268. Up to 2187 conditions per place. [2024-10-13 12:35:57,797 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 218 selfloop transitions, 35 changer transitions 0/265 dead transitions. [2024-10-13 12:35:57,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 265 transitions, 2783 flow [2024-10-13 12:35:57,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:35:57,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:35:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2024-10-13 12:35:57,798 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-10-13 12:35:57,798 INFO L175 Difference]: Start difference. First operand has 149 places, 211 transitions, 2003 flow. Second operand 6 states and 213 transitions. [2024-10-13 12:35:57,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 265 transitions, 2783 flow [2024-10-13 12:35:57,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 265 transitions, 2749 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-10-13 12:35:57,819 INFO L231 Difference]: Finished difference. Result has 152 places, 217 transitions, 2113 flow [2024-10-13 12:35:57,819 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1973, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2113, PETRI_PLACES=152, PETRI_TRANSITIONS=217} [2024-10-13 12:35:57,820 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 94 predicate places. [2024-10-13 12:35:57,820 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 217 transitions, 2113 flow [2024-10-13 12:35:57,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 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) [2024-10-13 12:35:57,820 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:35:57,820 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:35:57,825 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 (19)] Forceful destruction successful, exit code 0 [2024-10-13 12:35:58,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:35:58,021 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:35:58,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:35:58,022 INFO L85 PathProgramCache]: Analyzing trace with hash 184978279, now seen corresponding path program 2 times [2024-10-13 12:35:58,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:35:58,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1494639003] [2024-10-13 12:35:58,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:35:58,022 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 [2024-10-13 12:35:58,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:35:58,023 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:35:58,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2024-10-13 12:35:58,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 12:35:58,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:35:58,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-13 12:35:58,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:35:58,122 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 [2024-10-13 12:35:58,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 12:35:58,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:35:58,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-13 12:35:58,204 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-13 12:35:58,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-13 12:35:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:35:58,295 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:35:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:35:58,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:35:58,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1494639003] [2024-10-13 12:35:58,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1494639003] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:35:58,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:35:58,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-13 12:35:58,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549719614] [2024-10-13 12:35:58,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:35:58,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 12:35:58,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:35:58,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 12:35:58,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:36:00,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-13 12:36:05,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-13 12:36:07,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-13 12:36:09,709 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-10-13 12:36:09,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 217 transitions, 2113 flow. Second operand has 14 states, 14 states have (on average 25.0) internal successors, (350), 14 states have internal predecessors, (350), 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) [2024-10-13 12:36:09,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:36:09,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-10-13 12:36:09,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:36:11,833 INFO L124 PetriNetUnfolderBase]: 3232/6538 cut-off events. [2024-10-13 12:36:11,833 INFO L125 PetriNetUnfolderBase]: For 12334/12566 co-relation queries the response was YES. [2024-10-13 12:36:11,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18925 conditions, 6538 events. 3232/6538 cut-off events. For 12334/12566 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 49079 event pairs, 869 based on Foata normal form. 62/6465 useless extension candidates. Maximal degree in co-relation 18666. Up to 1617 conditions per place. [2024-10-13 12:36:11,865 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 236 selfloop transitions, 68 changer transitions 0/323 dead transitions. [2024-10-13 12:36:11,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 323 transitions, 3249 flow [2024-10-13 12:36:11,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-13 12:36:11,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-13 12:36:11,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 440 transitions. [2024-10-13 12:36:11,867 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-10-13 12:36:11,867 INFO L175 Difference]: Start difference. First operand has 152 places, 217 transitions, 2113 flow. Second operand 13 states and 440 transitions. [2024-10-13 12:36:11,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 323 transitions, 3249 flow [2024-10-13 12:36:11,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 323 transitions, 3191 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-10-13 12:36:11,903 INFO L231 Difference]: Finished difference. Result has 162 places, 231 transitions, 2372 flow [2024-10-13 12:36:11,903 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2372, PETRI_PLACES=162, PETRI_TRANSITIONS=231} [2024-10-13 12:36:11,904 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 104 predicate places. [2024-10-13 12:36:11,904 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 231 transitions, 2372 flow [2024-10-13 12:36:11,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 25.0) internal successors, (350), 14 states have internal predecessors, (350), 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) [2024-10-13 12:36:11,905 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:36:11,905 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:36:11,910 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 (20)] Forceful destruction successful, exit code 0 [2024-10-13 12:36:12,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:12,109 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:36:12,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:36:12,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1439359939, now seen corresponding path program 1 times [2024-10-13 12:36:12,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:36:12,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [753599182] [2024-10-13 12:36:12,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:36:12,110 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 [2024-10-13 12:36:12,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:36:12,113 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:36:12,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2024-10-13 12:36:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:36:12,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-13 12:36:12,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:36:12,200 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 [2024-10-13 12:36:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 12:36:12,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:36:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 12:36:12,719 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:36:12,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [753599182] [2024-10-13 12:36:12,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [753599182] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:36:12,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:36:12,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-13 12:36:12,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326479345] [2024-10-13 12:36:12,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:36:12,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 12:36:12,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:36:12,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 12:36:12,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:36:14,140 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-13 12:36:14,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 231 transitions, 2372 flow. Second operand has 14 states, 14 states have (on average 27.785714285714285) internal successors, (389), 14 states have internal predecessors, (389), 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) [2024-10-13 12:36:14,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:36:14,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-13 12:36:14,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:36:16,298 INFO L124 PetriNetUnfolderBase]: 5522/10738 cut-off events. [2024-10-13 12:36:16,298 INFO L125 PetriNetUnfolderBase]: For 16269/16289 co-relation queries the response was YES. [2024-10-13 12:36:16,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31105 conditions, 10738 events. 5522/10738 cut-off events. For 16269/16289 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 79389 event pairs, 732 based on Foata normal form. 212/10915 useless extension candidates. Maximal degree in co-relation 30845. Up to 2265 conditions per place. [2024-10-13 12:36:16,497 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 324 selfloop transitions, 72 changer transitions 0/418 dead transitions. [2024-10-13 12:36:16,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 418 transitions, 4065 flow [2024-10-13 12:36:16,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 12:36:16,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 12:36:16,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 489 transitions. [2024-10-13 12:36:16,500 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6791666666666667 [2024-10-13 12:36:16,500 INFO L175 Difference]: Start difference. First operand has 162 places, 231 transitions, 2372 flow. Second operand 12 states and 489 transitions. [2024-10-13 12:36:16,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 418 transitions, 4065 flow [2024-10-13 12:36:16,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 418 transitions, 3992 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-10-13 12:36:16,530 INFO L231 Difference]: Finished difference. Result has 173 places, 243 transitions, 2615 flow [2024-10-13 12:36:16,531 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2615, PETRI_PLACES=173, PETRI_TRANSITIONS=243} [2024-10-13 12:36:16,531 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 115 predicate places. [2024-10-13 12:36:16,531 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 243 transitions, 2615 flow [2024-10-13 12:36:16,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 27.785714285714285) internal successors, (389), 14 states have internal predecessors, (389), 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) [2024-10-13 12:36:16,531 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:36:16,531 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:36:16,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2024-10-13 12:36:16,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:16,732 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:36:16,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:36:16,733 INFO L85 PathProgramCache]: Analyzing trace with hash -558632727, now seen corresponding path program 2 times [2024-10-13 12:36:16,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:36:16,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003625898] [2024-10-13 12:36:16,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:36:16,733 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 [2024-10-13 12:36:16,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:36:16,734 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:36:16,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2024-10-13 12:36:16,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-13 12:36:16,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:36:16,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-13 12:36:16,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:36:16,810 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 [2024-10-13 12:36:16,814 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 [2024-10-13 12:36:16,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:36:16,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-13 12:36:16,940 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-13 12:36:16,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-13 12:36:17,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-13 12:36:17,053 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:36:17,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:36:17,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003625898] [2024-10-13 12:36:17,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003625898] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:36:17,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:36:17,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:36:17,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114724710] [2024-10-13 12:36:17,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:36:17,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 12:36:17,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:36:17,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 12:36:17,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-13 12:36:17,314 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-13 12:36:17,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 243 transitions, 2615 flow. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:17,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:36:17,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-13 12:36:17,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:36:19,023 INFO L124 PetriNetUnfolderBase]: 6353/12498 cut-off events. [2024-10-13 12:36:19,023 INFO L125 PetriNetUnfolderBase]: For 27684/27816 co-relation queries the response was YES. [2024-10-13 12:36:19,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38474 conditions, 12498 events. 6353/12498 cut-off events. For 27684/27816 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 98416 event pairs, 2885 based on Foata normal form. 83/12426 useless extension candidates. Maximal degree in co-relation 38206. Up to 5637 conditions per place. [2024-10-13 12:36:19,105 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 248 selfloop transitions, 37 changer transitions 0/308 dead transitions. [2024-10-13 12:36:19,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 308 transitions, 3719 flow [2024-10-13 12:36:19,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:36:19,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:36:19,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 210 transitions. [2024-10-13 12:36:19,107 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-10-13 12:36:19,107 INFO L175 Difference]: Start difference. First operand has 173 places, 243 transitions, 2615 flow. Second operand 6 states and 210 transitions. [2024-10-13 12:36:19,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 308 transitions, 3719 flow [2024-10-13 12:36:19,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 308 transitions, 3642 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-10-13 12:36:19,151 INFO L231 Difference]: Finished difference. Result has 177 places, 251 transitions, 2719 flow [2024-10-13 12:36:19,151 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2546, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2719, PETRI_PLACES=177, PETRI_TRANSITIONS=251} [2024-10-13 12:36:19,151 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 119 predicate places. [2024-10-13 12:36:19,152 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 251 transitions, 2719 flow [2024-10-13 12:36:19,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:36:19,152 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:36:19,152 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:36:19,155 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 (22)] Forceful destruction successful, exit code 0 [2024-10-13 12:36:19,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:19,353 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:36:19,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:36:19,353 INFO L85 PathProgramCache]: Analyzing trace with hash -953798583, now seen corresponding path program 2 times [2024-10-13 12:36:19,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:36:19,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605959050] [2024-10-13 12:36:19,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:36:19,354 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 [2024-10-13 12:36:19,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:36:19,355 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:36:19,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2024-10-13 12:36:19,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 12:36:19,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:36:19,440 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-13 12:36:19,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:36:19,450 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 [2024-10-13 12:36:19,454 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 [2024-10-13 12:36:19,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:36:19,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-13 12:36:19,510 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-13 12:36:19,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-13 12:36:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 12:36:19,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:36:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-13 12:36:20,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:36:20,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605959050] [2024-10-13 12:36:20,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605959050] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:36:20,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:36:20,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-13 12:36:20,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677863221] [2024-10-13 12:36:20,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:36:20,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 12:36:20,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:36:20,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 12:36:20,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-10-13 12:36:21,532 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-13 12:36:21,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 251 transitions, 2719 flow. Second operand has 12 states, 12 states have (on average 26.666666666666668) internal successors, (320), 12 states have internal predecessors, (320), 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) [2024-10-13 12:36:21,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:36:21,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-13 12:36:21,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:36:25,142 INFO L124 PetriNetUnfolderBase]: 11865/23498 cut-off events. [2024-10-13 12:36:25,143 INFO L125 PetriNetUnfolderBase]: For 57225/57631 co-relation queries the response was YES. [2024-10-13 12:36:25,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73190 conditions, 23498 events. 11865/23498 cut-off events. For 57225/57631 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 202039 event pairs, 1936 based on Foata normal form. 607/23913 useless extension candidates. Maximal degree in co-relation 72920. Up to 3760 conditions per place. [2024-10-13 12:36:25,273 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 415 selfloop transitions, 50 changer transitions 0/488 dead transitions. [2024-10-13 12:36:25,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 488 transitions, 5625 flow [2024-10-13 12:36:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 12:36:25,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 12:36:25,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 449 transitions. [2024-10-13 12:36:25,275 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6236111111111111 [2024-10-13 12:36:25,275 INFO L175 Difference]: Start difference. First operand has 177 places, 251 transitions, 2719 flow. Second operand 12 states and 449 transitions. [2024-10-13 12:36:25,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 488 transitions, 5625 flow [2024-10-13 12:36:25,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 488 transitions, 5551 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-10-13 12:36:25,374 INFO L231 Difference]: Finished difference. Result has 188 places, 263 transitions, 2907 flow [2024-10-13 12:36:25,374 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2907, PETRI_PLACES=188, PETRI_TRANSITIONS=263} [2024-10-13 12:36:25,375 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 130 predicate places. [2024-10-13 12:36:25,375 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 263 transitions, 2907 flow [2024-10-13 12:36:25,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 26.666666666666668) internal successors, (320), 12 states have internal predecessors, (320), 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) [2024-10-13 12:36:25,375 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:36:25,375 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:36:25,379 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 (23)] Forceful destruction successful, exit code 0 [2024-10-13 12:36:25,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:36:25,576 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-13 12:36:25,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:36:25,576 INFO L85 PathProgramCache]: Analyzing trace with hash 524540466, now seen corresponding path program 1 times [2024-10-13 12:36:25,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:36:25,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847379642] [2024-10-13 12:36:25,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:36:25,577 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 [2024-10-13 12:36:25,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:36:25,578 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-13 12:36:25,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2024-10-13 12:36:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:36:25,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-13 12:36:25,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:36:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:36:25,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:36:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:36:26,379 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:36:26,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847379642] [2024-10-13 12:36:26,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847379642] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:36:26,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:36:26,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2024-10-13 12:36:26,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895640903] [2024-10-13 12:36:26,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:36:26,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-13 12:36:26,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:36:26,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-13 12:36:26,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-10-13 12:36:26,769 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-13 12:36:26,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 263 transitions, 2907 flow. Second operand has 16 states, 16 states have (on average 33.25) internal successors, (532), 16 states have internal predecessors, (532), 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) [2024-10-13 12:36:26,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:36:26,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-13 12:36:26,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand