./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/parallel-min-max-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 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/parallel-min-max-1.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 0d8fc97f7c37032d6079f8a24b87bc520ff0a9c17c3894514011566166a643e8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:18:24,210 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:18:24,263 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:18:24,268 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:18:24,269 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:18:24,286 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:18:24,286 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:18:24,286 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:18:24,287 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:18:24,287 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:18:24,287 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:18:24,288 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:18:24,288 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:18:24,288 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:18:24,289 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:18:24,289 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:18:24,289 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:18:24,290 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:18:24,290 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:18:24,290 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:18:24,290 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:18:24,291 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:18:24,291 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:18:24,291 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:18:24,291 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:18:24,292 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:18:24,292 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:18:24,292 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:18:24,292 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:18:24,293 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:18:24,293 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:18:24,293 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:18:24,294 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:18:24,294 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:18:24,294 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:18:24,294 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:18:24,295 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:18:24,295 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:18:24,295 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:18:24,295 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:18:24,295 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:18:24,296 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:18:24,296 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8fc97f7c37032d6079f8a24b87bc520ff0a9c17c3894514011566166a643e8 [2024-10-24 19:18:24,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:18:24,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:18:24,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:18:24,492 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:18:24,492 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:18:24,493 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2024-10-24 19:18:25,805 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:18:25,960 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:18:25,961 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2024-10-24 19:18:25,970 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56e23a19b/1bc7bf55dfef4e6aad4308a001fcb190/FLAG686b5a7bd [2024-10-24 19:18:26,358 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56e23a19b/1bc7bf55dfef4e6aad4308a001fcb190 [2024-10-24 19:18:26,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:18:26,363 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:18:26,365 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:18:26,365 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:18:26,369 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:18:26,369 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:18:26" (1/1) ... [2024-10-24 19:18:26,370 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@584219eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:18:26, skipping insertion in model container [2024-10-24 19:18:26,370 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:18:26" (1/1) ... [2024-10-24 19:18:26,390 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:18:26,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:18:26,580 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) [2024-10-24 19:18:26,581 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2c3ea3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:18:26, skipping insertion in model container [2024-10-24 19:18:26,581 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:18:26,581 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-24 19:18:26,583 INFO L158 Benchmark]: Toolchain (without parser) took 219.19ms. Allocated memory is still 151.0MB. Free memory was 79.4MB in the beginning and 67.7MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-24 19:18:26,584 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 151.0MB. Free memory is still 103.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 19:18:26,584 INFO L158 Benchmark]: CACSL2BoogieTranslator took 216.85ms. Allocated memory is still 151.0MB. Free memory was 79.4MB in the beginning and 67.7MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-24 19:18:26,585 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 151.0MB. Free memory is still 103.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 216.85ms. Allocated memory is still 151.0MB. Free memory was 79.4MB in the beginning and 67.7MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 124]: 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/parallel-min-max-1.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 0d8fc97f7c37032d6079f8a24b87bc520ff0a9c17c3894514011566166a643e8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:18:28,341 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:18:28,391 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-24 19:18:28,396 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:18:28,397 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:18:28,419 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:18:28,420 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:18:28,420 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:18:28,421 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:18:28,421 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:18:28,421 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:18:28,421 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:18:28,422 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:18:28,422 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:18:28,422 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:18:28,423 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:18:28,423 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:18:28,423 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:18:28,423 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:18:28,424 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:18:28,424 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:18:28,424 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:18:28,424 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:18:28,425 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:18:28,425 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:18:28,425 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-24 19:18:28,425 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:18:28,425 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-24 19:18:28,426 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:18:28,426 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:18:28,426 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:18:28,426 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:18:28,426 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:18:28,427 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:18:28,427 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:18:28,427 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:18:28,427 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:18:28,427 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:18:28,427 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-24 19:18:28,428 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-24 19:18:28,428 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:18:28,428 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:18:28,428 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:18:28,430 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:18:28,431 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-24 19:18:28,431 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8fc97f7c37032d6079f8a24b87bc520ff0a9c17c3894514011566166a643e8 [2024-10-24 19:18:28,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:18:28,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:18:28,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:18:28,748 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:18:28,749 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:18:28,750 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2024-10-24 19:18:30,216 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:18:30,396 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:18:30,397 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2024-10-24 19:18:30,405 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a10c87ef/bc5e22f9655f4b968081017256687181/FLAG44a120aee [2024-10-24 19:18:30,417 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a10c87ef/bc5e22f9655f4b968081017256687181 [2024-10-24 19:18:30,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:18:30,420 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:18:30,423 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:18:30,423 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:18:30,427 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:18:30,427 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:18:30" (1/1) ... [2024-10-24 19:18:30,428 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@614694de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:18:30, skipping insertion in model container [2024-10-24 19:18:30,428 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:18:30" (1/1) ... [2024-10-24 19:18:30,448 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:18:30,622 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:18:30,633 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-24 19:18:30,638 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:18:30,659 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:18:30,664 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:18:30,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:18:30,712 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:18:30,713 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:18:30 WrapperNode [2024-10-24 19:18:30,713 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:18:30,714 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:18:30,714 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:18:30,714 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:18:30,719 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:18:30" (1/1) ... [2024-10-24 19:18:30,729 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:18:30" (1/1) ... [2024-10-24 19:18:30,754 INFO L138 Inliner]: procedures = 26, calls = 39, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 112 [2024-10-24 19:18:30,754 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:18:30,755 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:18:30,755 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:18:30,755 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:18:30,763 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:18:30" (1/1) ... [2024-10-24 19:18:30,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:18:30" (1/1) ... [2024-10-24 19:18:30,768 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:18:30" (1/1) ... [2024-10-24 19:18:30,791 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-24 19:18:30,791 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:18:30" (1/1) ... [2024-10-24 19:18:30,792 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:18:30" (1/1) ... [2024-10-24 19:18:30,803 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:18:30" (1/1) ... [2024-10-24 19:18:30,808 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:18:30" (1/1) ... [2024-10-24 19:18:30,809 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:18:30" (1/1) ... [2024-10-24 19:18:30,810 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:18:30" (1/1) ... [2024-10-24 19:18:30,816 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:18:30,817 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:18:30,821 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:18:30,821 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:18:30,822 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:18:30" (1/1) ... [2024-10-24 19:18:30,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:18:30,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:18:30,852 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) [2024-10-24 19:18:30,866 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 [2024-10-24 19:18:30,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:18:30,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-24 19:18:30,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-24 19:18:30,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-24 19:18:30,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-24 19:18:30,908 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 19:18:30,908 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 19:18:30,908 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 19:18:30,909 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 19:18:30,909 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-24 19:18:30,909 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-24 19:18:30,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-24 19:18:30,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-24 19:18:30,909 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 19:18:30,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:18:30,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:18:30,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-24 19:18:30,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-24 19:18:30,912 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 19:18:31,033 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:18:31,034 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:18:31,411 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:18:31,411 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:18:31,694 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:18:31,696 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-24 19:18:31,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:18:31 BoogieIcfgContainer [2024-10-24 19:18:31,696 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:18:31,698 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:18:31,699 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:18:31,701 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:18:31,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:18:30" (1/3) ... [2024-10-24 19:18:31,702 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642970df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:18:31, skipping insertion in model container [2024-10-24 19:18:31,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:18:30" (2/3) ... [2024-10-24 19:18:31,702 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642970df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:18:31, skipping insertion in model container [2024-10-24 19:18:31,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:18:31" (3/3) ... [2024-10-24 19:18:31,704 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2024-10-24 19:18:31,717 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:18:31,718 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-10-24 19:18:31,718 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:18:31,788 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-24 19:18:31,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 60 transitions, 141 flow [2024-10-24 19:18:31,845 INFO L124 PetriNetUnfolderBase]: 4/57 cut-off events. [2024-10-24 19:18:31,845 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-24 19:18:31,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 4/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 143 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2024-10-24 19:18:31,849 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 60 transitions, 141 flow [2024-10-24 19:18:31,852 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 56 transitions, 130 flow [2024-10-24 19:18:31,861 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:18:31,869 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;@a54f32a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:18:31,869 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-10-24 19:18:31,872 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:18:31,873 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-24 19:18:31,873 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:18:31,874 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:18:31,875 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:18:31,876 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-24 19:18:31,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:18:31,881 INFO L85 PathProgramCache]: Analyzing trace with hash 520375, now seen corresponding path program 1 times [2024-10-24 19:18:31,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:18:31,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1200948198] [2024-10-24 19:18:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:18:31,893 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 [2024-10-24 19:18:31,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:18:31,898 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) [2024-10-24 19:18:31,913 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 [2024-10-24 19:18:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:18:31,985 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 19:18:31,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:18:32,035 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 [2024-10-24 19:18:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:18:32,050 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:18:32,050 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:18:32,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1200948198] [2024-10-24 19:18:32,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1200948198] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:18:32,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:18:32,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:18:32,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537354332] [2024-10-24 19:18:32,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:18:32,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:18:32,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:18:32,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:18:32,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:18:32,097 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-10-24 19:18:32,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2024-10-24 19:18:32,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:18:32,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-10-24 19:18:32,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:18:32,552 INFO L124 PetriNetUnfolderBase]: 1313/2099 cut-off events. [2024-10-24 19:18:32,556 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-10-24 19:18:32,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4141 conditions, 2099 events. 1313/2099 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 12825 event pairs, 890 based on Foata normal form. 1/1293 useless extension candidates. Maximal degree in co-relation 3981. Up to 1832 conditions per place. [2024-10-24 19:18:32,572 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 31 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2024-10-24 19:18:32,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 49 transitions, 182 flow [2024-10-24 19:18:32,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:18:32,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:18:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-10-24 19:18:32,583 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-10-24 19:18:32,584 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 130 flow. Second operand 3 states and 99 transitions. [2024-10-24 19:18:32,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 49 transitions, 182 flow [2024-10-24 19:18:32,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 49 transitions, 170 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-24 19:18:32,594 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 108 flow [2024-10-24 19:18:32,597 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2024-10-24 19:18:32,599 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -11 predicate places. [2024-10-24 19:18:32,599 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 108 flow [2024-10-24 19:18:32,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2024-10-24 19:18:32,600 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:18:32,600 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:18:32,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-10-24 19:18:32,800 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 [2024-10-24 19:18:32,801 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-24 19:18:32,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:18:32,802 INFO L85 PathProgramCache]: Analyzing trace with hash 520376, now seen corresponding path program 1 times [2024-10-24 19:18:32,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:18:32,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415845174] [2024-10-24 19:18:32,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:18:32,803 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 [2024-10-24 19:18:32,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:18:32,806 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) [2024-10-24 19:18:32,806 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 [2024-10-24 19:18:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:18:32,879 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:18:32,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:18:32,892 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 [2024-10-24 19:18:32,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:18:32,949 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:18:32,949 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:18:32,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415845174] [2024-10-24 19:18:32,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415845174] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:18:32,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:18:32,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:18:32,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700389814] [2024-10-24 19:18:32,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:18:32,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:18:32,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:18:32,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:18:32,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:18:32,988 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-10-24 19:18:32,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2024-10-24 19:18:32,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:18:32,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-10-24 19:18:32,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:18:33,288 INFO L124 PetriNetUnfolderBase]: 1313/2101 cut-off events. [2024-10-24 19:18:33,288 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 19:18:33,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4034 conditions, 2101 events. 1313/2101 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 12911 event pairs, 890 based on Foata normal form. 1/1295 useless extension candidates. Maximal degree in co-relation 4015. Up to 1836 conditions per place. [2024-10-24 19:18:33,298 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 34 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-10-24 19:18:33,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 184 flow [2024-10-24 19:18:33,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:18:33,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:18:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-10-24 19:18:33,300 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-10-24 19:18:33,300 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 108 flow. Second operand 3 states and 98 transitions. [2024-10-24 19:18:33,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 184 flow [2024-10-24 19:18:33,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 180 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:18:33,303 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 118 flow [2024-10-24 19:18:33,304 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-10-24 19:18:33,304 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -10 predicate places. [2024-10-24 19:18:33,305 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 118 flow [2024-10-24 19:18:33,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2024-10-24 19:18:33,305 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:18:33,305 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-24 19:18:33,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-10-24 19:18:33,507 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 [2024-10-24 19:18:33,508 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-24 19:18:33,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:18:33,508 INFO L85 PathProgramCache]: Analyzing trace with hash 500098148, now seen corresponding path program 1 times [2024-10-24 19:18:33,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:18:33,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064704795] [2024-10-24 19:18:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:18:33,509 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 [2024-10-24 19:18:33,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:18:33,514 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) [2024-10-24 19:18:33,515 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 [2024-10-24 19:18:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:18:33,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 19:18:33,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:18:33,645 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 [2024-10-24 19:18:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:18:33,819 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:18:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:18:33,994 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:18:33,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064704795] [2024-10-24 19:18:33,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064704795] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:18:33,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:18:33,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-24 19:18:33,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778425606] [2024-10-24 19:18:33,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:18:33,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:18:33,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:18:33,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:18:33,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:18:34,158 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-10-24 19:18:34,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 118 flow. Second operand has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 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) [2024-10-24 19:18:34,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:18:34,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-10-24 19:18:34,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:18:34,783 INFO L124 PetriNetUnfolderBase]: 1316/2110 cut-off events. [2024-10-24 19:18:34,783 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 19:18:34,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4063 conditions, 2110 events. 1316/2110 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 12921 event pairs, 890 based on Foata normal form. 0/1303 useless extension candidates. Maximal degree in co-relation 4050. Up to 1839 conditions per place. [2024-10-24 19:18:34,792 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 34 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2024-10-24 19:18:34,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 60 transitions, 240 flow [2024-10-24 19:18:34,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 19:18:34,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 19:18:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-10-24 19:18:34,796 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-10-24 19:18:34,797 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 118 flow. Second operand 9 states and 228 transitions. [2024-10-24 19:18:34,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 60 transitions, 240 flow [2024-10-24 19:18:34,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:18:34,798 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 190 flow [2024-10-24 19:18:34,800 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=190, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-10-24 19:18:34,800 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 0 predicate places. [2024-10-24 19:18:34,801 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 190 flow [2024-10-24 19:18:34,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 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) [2024-10-24 19:18:34,801 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:18:34,801 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-24 19:18:34,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-10-24 19:18:35,004 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 [2024-10-24 19:18:35,004 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-24 19:18:35,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:18:35,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1676824920, now seen corresponding path program 1 times [2024-10-24 19:18:35,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:18:35,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873859947] [2024-10-24 19:18:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:18:35,005 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 [2024-10-24 19:18:35,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:18:35,009 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) [2024-10-24 19:18:35,011 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 [2024-10-24 19:18:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:18:35,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 19:18:35,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:18:35,064 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 [2024-10-24 19:18:35,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:18:35,079 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:18:35,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:18:35,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873859947] [2024-10-24 19:18:35,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873859947] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:18:35,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:18:35,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:18:35,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733438126] [2024-10-24 19:18:35,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:18:35,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:18:35,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:18:35,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:18:35,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:18:35,095 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-10-24 19:18:35,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:18:35,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:18:35,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-10-24 19:18:35,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:18:35,289 INFO L124 PetriNetUnfolderBase]: 779/1288 cut-off events. [2024-10-24 19:18:35,289 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-24 19:18:35,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2494 conditions, 1288 events. 779/1288 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7267 event pairs, 524 based on Foata normal form. 0/926 useless extension candidates. Maximal degree in co-relation 2463. Up to 1099 conditions per place. [2024-10-24 19:18:35,295 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 35 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-10-24 19:18:35,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 260 flow [2024-10-24 19:18:35,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:18:35,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:18:35,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-10-24 19:18:35,297 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-10-24 19:18:35,297 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 190 flow. Second operand 4 states and 110 transitions. [2024-10-24 19:18:35,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 260 flow [2024-10-24 19:18:35,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 55 transitions, 246 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-24 19:18:35,299 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 176 flow [2024-10-24 19:18:35,299 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-10-24 19:18:35,300 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2024-10-24 19:18:35,300 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 176 flow [2024-10-24 19:18:35,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:18:35,300 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:18:35,301 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-24 19:18:35,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-24 19:18:35,501 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 [2024-10-24 19:18:35,502 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-24 19:18:35,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:18:35,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1676824919, now seen corresponding path program 1 times [2024-10-24 19:18:35,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:18:35,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041063789] [2024-10-24 19:18:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:18:35,505 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 [2024-10-24 19:18:35,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:18:35,508 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) [2024-10-24 19:18:35,512 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 [2024-10-24 19:18:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:18:35,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:18:35,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:18:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:18:35,634 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:18:35,747 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 [2024-10-24 19:18:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:18:35,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:18:35,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041063789] [2024-10-24 19:18:35,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041063789] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:18:35,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:18:35,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-10-24 19:18:35,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33688071] [2024-10-24 19:18:35,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:18:35,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 19:18:35,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:18:35,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 19:18:35,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-24 19:18:35,897 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-10-24 19:18:35,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 176 flow. Second operand has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 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) [2024-10-24 19:18:35,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:18:35,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-10-24 19:18:35,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:18:36,149 INFO L124 PetriNetUnfolderBase]: 598/988 cut-off events. [2024-10-24 19:18:36,150 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-10-24 19:18:36,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1917 conditions, 988 events. 598/988 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5283 event pairs, 377 based on Foata normal form. 0/757 useless extension candidates. Maximal degree in co-relation 1885. Up to 837 conditions per place. [2024-10-24 19:18:36,155 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 31 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-10-24 19:18:36,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 52 transitions, 246 flow [2024-10-24 19:18:36,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:18:36,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:18:36,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-10-24 19:18:36,156 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-10-24 19:18:36,156 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 176 flow. Second operand 6 states and 155 transitions. [2024-10-24 19:18:36,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 52 transitions, 246 flow [2024-10-24 19:18:36,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 52 transitions, 240 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:18:36,158 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 178 flow [2024-10-24 19:18:36,159 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-10-24 19:18:36,159 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2024-10-24 19:18:36,159 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 178 flow [2024-10-24 19:18:36,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 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) [2024-10-24 19:18:36,160 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:18:36,160 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-24 19:18:36,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-10-24 19:18:36,360 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 [2024-10-24 19:18:36,361 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-24 19:18:36,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:18:36,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1617517928, now seen corresponding path program 2 times [2024-10-24 19:18:36,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:18:36,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559680496] [2024-10-24 19:18:36,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:18:36,362 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 [2024-10-24 19:18:36,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:18:36,364 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) [2024-10-24 19:18:36,365 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 [2024-10-24 19:18:36,428 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:18:36,428 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:18:36,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 19:18:36,433 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:18:36,448 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 [2024-10-24 19:18:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:18:36,683 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:18:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:18:37,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:18:37,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559680496] [2024-10-24 19:18:37,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559680496] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:18:37,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:18:37,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-24 19:18:37,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469968179] [2024-10-24 19:18:37,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:18:37,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:18:37,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:18:37,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:18:37,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:18:37,383 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-10-24 19:18:37,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 178 flow. Second operand has 14 states, 14 states have (on average 21.571428571428573) internal successors, (302), 14 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:18:37,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:18:37,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-10-24 19:18:37,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:18:39,011 INFO L124 PetriNetUnfolderBase]: 604/1006 cut-off events. [2024-10-24 19:18:39,012 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-10-24 19:18:39,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 1006 events. 604/1006 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5361 event pairs, 377 based on Foata normal form. 6/781 useless extension candidates. Maximal degree in co-relation 1890. Up to 848 conditions per place. [2024-10-24 19:18:39,016 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 28 selfloop transitions, 29 changer transitions 0/70 dead transitions. [2024-10-24 19:18:39,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 70 transitions, 406 flow [2024-10-24 19:18:39,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 19:18:39,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-24 19:18:39,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 483 transitions. [2024-10-24 19:18:39,018 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-10-24 19:18:39,018 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 178 flow. Second operand 21 states and 483 transitions. [2024-10-24 19:18:39,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 70 transitions, 406 flow [2024-10-24 19:18:39,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 70 transitions, 400 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:18:39,021 INFO L231 Difference]: Finished difference. Result has 82 places, 70 transitions, 374 flow [2024-10-24 19:18:39,021 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=374, PETRI_PLACES=82, PETRI_TRANSITIONS=70} [2024-10-24 19:18:39,022 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 20 predicate places. [2024-10-24 19:18:39,022 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 70 transitions, 374 flow [2024-10-24 19:18:39,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.571428571428573) internal successors, (302), 14 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:18:39,022 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:18:39,022 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:18:39,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-24 19:18:39,223 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 [2024-10-24 19:18:39,224 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-24 19:18:39,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:18:39,224 INFO L85 PathProgramCache]: Analyzing trace with hash -79017869, now seen corresponding path program 1 times [2024-10-24 19:18:39,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:18:39,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285857356] [2024-10-24 19:18:39,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:18:39,225 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 [2024-10-24 19:18:39,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:18:39,226 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) [2024-10-24 19:18:39,228 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 [2024-10-24 19:18:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:18:39,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 19:18:39,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:18:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:18:39,332 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:18:39,332 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:18:39,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285857356] [2024-10-24 19:18:39,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285857356] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:18:39,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:18:39,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:18:39,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625725577] [2024-10-24 19:18:39,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:18:39,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:18:39,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:18:39,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:18:39,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:18:39,340 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-10-24 19:18:39,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 70 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:18:39,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:18:39,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-10-24 19:18:39,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:18:39,490 INFO L124 PetriNetUnfolderBase]: 603/1006 cut-off events. [2024-10-24 19:18:39,490 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-10-24 19:18:39,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2051 conditions, 1006 events. 603/1006 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5353 event pairs, 377 based on Foata normal form. 1/776 useless extension candidates. Maximal degree in co-relation 2000. Up to 868 conditions per place. [2024-10-24 19:18:39,502 INFO L140 encePairwiseOnDemand]: 58/60 looper letters, 57 selfloop transitions, 0 changer transitions 1/70 dead transitions. [2024-10-24 19:18:39,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 70 transitions, 490 flow [2024-10-24 19:18:39,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:18:39,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:18:39,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-10-24 19:18:39,504 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-10-24 19:18:39,505 INFO L175 Difference]: Start difference. First operand has 82 places, 70 transitions, 374 flow. Second operand 3 states and 87 transitions. [2024-10-24 19:18:39,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 70 transitions, 490 flow [2024-10-24 19:18:39,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 70 transitions, 402 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-10-24 19:18:39,508 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 286 flow [2024-10-24 19:18:39,508 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2024-10-24 19:18:39,509 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 15 predicate places. [2024-10-24 19:18:39,509 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 286 flow [2024-10-24 19:18:39,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:18:39,509 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:18:39,509 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:18:39,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-24 19:18:39,710 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 [2024-10-24 19:18:39,711 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-24 19:18:39,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:18:39,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1332249490, now seen corresponding path program 1 times [2024-10-24 19:18:39,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:18:39,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560979040] [2024-10-24 19:18:39,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:18:39,712 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 [2024-10-24 19:18:39,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:18:39,715 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) [2024-10-24 19:18:39,718 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 [2024-10-24 19:18:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:18:39,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 19:18:39,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:18:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:18:39,836 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:18:39,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:18:39,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560979040] [2024-10-24 19:18:39,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560979040] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:18:39,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:18:39,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:18:39,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761650044] [2024-10-24 19:18:39,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:18:39,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 19:18:39,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:18:39,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 19:18:39,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-24 19:18:39,861 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-10-24 19:18:39,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 286 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:18:39,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:18:39,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-10-24 19:18:39,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:18:40,085 INFO L124 PetriNetUnfolderBase]: 736/1234 cut-off events. [2024-10-24 19:18:40,085 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-10-24 19:18:40,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2458 conditions, 1234 events. 736/1234 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6590 event pairs, 378 based on Foata normal form. 0/1023 useless extension candidates. Maximal degree in co-relation 2443. Up to 795 conditions per place. [2024-10-24 19:18:40,092 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 56 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-10-24 19:18:40,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 83 transitions, 458 flow [2024-10-24 19:18:40,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:18:40,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:18:40,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-10-24 19:18:40,094 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-10-24 19:18:40,094 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 286 flow. Second operand 6 states and 157 transitions. [2024-10-24 19:18:40,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 83 transitions, 458 flow [2024-10-24 19:18:40,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 83 transitions, 456 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 19:18:40,098 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 327 flow [2024-10-24 19:18:40,100 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2024-10-24 19:18:40,100 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 19 predicate places. [2024-10-24 19:18:40,101 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 327 flow [2024-10-24 19:18:40,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:18:40,101 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:18:40,101 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:18:40,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2024-10-24 19:18:40,301 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 [2024-10-24 19:18:40,302 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-24 19:18:40,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:18:40,302 INFO L85 PathProgramCache]: Analyzing trace with hash 349359649, now seen corresponding path program 1 times [2024-10-24 19:18:40,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:18:40,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966829879] [2024-10-24 19:18:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:18:40,303 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 [2024-10-24 19:18:40,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:18:40,305 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) [2024-10-24 19:18:40,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-24 19:18:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:18:40,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 19:18:40,372 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:18:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:18:40,452 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:18:40,452 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:18:40,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966829879] [2024-10-24 19:18:40,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966829879] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:18:40,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:18:40,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:18:40,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354279249] [2024-10-24 19:18:40,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:18:40,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 19:18:40,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:18:40,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 19:18:40,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-24 19:18:40,474 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-10-24 19:18:40,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 327 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 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) [2024-10-24 19:18:40,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:18:40,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-10-24 19:18:40,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:18:40,673 INFO L124 PetriNetUnfolderBase]: 816/1360 cut-off events. [2024-10-24 19:18:40,674 INFO L125 PetriNetUnfolderBase]: For 231/324 co-relation queries the response was YES. [2024-10-24 19:18:40,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3090 conditions, 1360 events. 816/1360 cut-off events. For 231/324 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7314 event pairs, 456 based on Foata normal form. 93/1353 useless extension candidates. Maximal degree in co-relation 3074. Up to 904 conditions per place. [2024-10-24 19:18:40,681 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 59 selfloop transitions, 15 changer transitions 0/86 dead transitions. [2024-10-24 19:18:40,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 86 transitions, 519 flow [2024-10-24 19:18:40,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:18:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:18:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-10-24 19:18:40,683 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-10-24 19:18:40,684 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 327 flow. Second operand 6 states and 156 transitions. [2024-10-24 19:18:40,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 86 transitions, 519 flow [2024-10-24 19:18:40,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 86 transitions, 490 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:18:40,686 INFO L231 Difference]: Finished difference. Result has 83 places, 73 transitions, 343 flow [2024-10-24 19:18:40,692 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=83, PETRI_TRANSITIONS=73} [2024-10-24 19:18:40,693 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 21 predicate places. [2024-10-24 19:18:40,693 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 73 transitions, 343 flow [2024-10-24 19:18:40,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 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) [2024-10-24 19:18:40,695 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:18:40,695 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:18:40,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2024-10-24 19:18:40,895 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 [2024-10-24 19:18:40,896 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-24 19:18:40,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:18:40,897 INFO L85 PathProgramCache]: Analyzing trace with hash -747608318, now seen corresponding path program 1 times [2024-10-24 19:18:40,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:18:40,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073453878] [2024-10-24 19:18:40,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:18:40,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:18:40,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:18:40,902 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) [2024-10-24 19:18:40,903 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 [2024-10-24 19:18:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:18:40,968 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 19:18:40,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:18:40,983 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 [2024-10-24 19:18:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:18:41,199 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:18:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:18:41,544 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:18:41,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073453878] [2024-10-24 19:18:41,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073453878] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:18:41,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:18:41,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-24 19:18:41,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223311] [2024-10-24 19:18:41,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:18:41,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:18:41,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:18:41,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:18:41,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-24 19:18:41,756 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 60 [2024-10-24 19:18:41,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 73 transitions, 343 flow. Second operand has 12 states, 12 states have (on average 20.333333333333332) internal successors, (244), 12 states have internal predecessors, (244), 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) [2024-10-24 19:18:41,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:18:41,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 60 [2024-10-24 19:18:41,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:18:43,155 INFO L124 PetriNetUnfolderBase]: 1895/2870 cut-off events. [2024-10-24 19:18:43,156 INFO L125 PetriNetUnfolderBase]: For 676/873 co-relation queries the response was YES. [2024-10-24 19:18:43,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7190 conditions, 2870 events. 1895/2870 cut-off events. For 676/873 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15484 event pairs, 457 based on Foata normal form. 373/3177 useless extension candidates. Maximal degree in co-relation 7173. Up to 915 conditions per place. [2024-10-24 19:18:43,182 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 159 selfloop transitions, 23 changer transitions 0/193 dead transitions. [2024-10-24 19:18:43,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 193 transitions, 1070 flow [2024-10-24 19:18:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:18:43,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:18:43,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 355 transitions. [2024-10-24 19:18:43,185 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4930555555555556 [2024-10-24 19:18:43,185 INFO L175 Difference]: Start difference. First operand has 83 places, 73 transitions, 343 flow. Second operand 12 states and 355 transitions. [2024-10-24 19:18:43,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 193 transitions, 1070 flow [2024-10-24 19:18:43,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 193 transitions, 1027 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:18:43,199 INFO L231 Difference]: Finished difference. Result has 94 places, 82 transitions, 424 flow [2024-10-24 19:18:43,199 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=424, PETRI_PLACES=94, PETRI_TRANSITIONS=82} [2024-10-24 19:18:43,199 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 32 predicate places. [2024-10-24 19:18:43,199 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 82 transitions, 424 flow [2024-10-24 19:18:43,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.333333333333332) internal successors, (244), 12 states have internal predecessors, (244), 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) [2024-10-24 19:18:43,200 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:18:43,200 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:18:43,208 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 [2024-10-24 19:18:43,408 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 [2024-10-24 19:18:43,408 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-24 19:18:43,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:18:43,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1068176481, now seen corresponding path program 1 times [2024-10-24 19:18:43,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:18:43,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1244551064] [2024-10-24 19:18:43,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:18:43,410 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 [2024-10-24 19:18:43,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:18:43,412 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) [2024-10-24 19:18:43,413 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 [2024-10-24 19:18:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:18:43,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 19:18:43,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:18:43,483 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 [2024-10-24 19:18:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:18:43,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:18:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:18:44,216 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:18:44,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1244551064] [2024-10-24 19:18:44,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1244551064] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:18:44,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:18:44,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-24 19:18:44,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132374861] [2024-10-24 19:18:44,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:18:44,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:18:44,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:18:44,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:18:44,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-24 19:18:44,450 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 60 [2024-10-24 19:18:44,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 82 transitions, 424 flow. Second operand has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 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) [2024-10-24 19:18:44,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:18:44,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 60 [2024-10-24 19:18:44,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:18:46,044 INFO L124 PetriNetUnfolderBase]: 3515/5284 cut-off events. [2024-10-24 19:18:46,044 INFO L125 PetriNetUnfolderBase]: For 6776/7563 co-relation queries the response was YES. [2024-10-24 19:18:46,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15085 conditions, 5284 events. 3515/5284 cut-off events. For 6776/7563 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 29381 event pairs, 881 based on Foata normal form. 935/6187 useless extension candidates. Maximal degree in co-relation 15064. Up to 1697 conditions per place. [2024-10-24 19:18:46,070 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 195 selfloop transitions, 23 changer transitions 0/233 dead transitions. [2024-10-24 19:18:46,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 233 transitions, 1604 flow [2024-10-24 19:18:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:18:46,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:18:46,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 346 transitions. [2024-10-24 19:18:46,073 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2024-10-24 19:18:46,073 INFO L175 Difference]: Start difference. First operand has 94 places, 82 transitions, 424 flow. Second operand 12 states and 346 transitions. [2024-10-24 19:18:46,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 233 transitions, 1604 flow [2024-10-24 19:18:46,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 233 transitions, 1474 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-10-24 19:18:46,080 INFO L231 Difference]: Finished difference. Result has 106 places, 91 transitions, 506 flow [2024-10-24 19:18:46,081 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=506, PETRI_PLACES=106, PETRI_TRANSITIONS=91} [2024-10-24 19:18:46,081 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 44 predicate places. [2024-10-24 19:18:46,081 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 91 transitions, 506 flow [2024-10-24 19:18:46,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 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) [2024-10-24 19:18:46,082 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:18:46,082 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-10-24 19:18:46,086 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 [2024-10-24 19:18:46,282 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 [2024-10-24 19:18:46,282 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-24 19:18:46,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:18:46,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1087837808, now seen corresponding path program 3 times [2024-10-24 19:18:46,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:18:46,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136709888] [2024-10-24 19:18:46,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 19:18:46,283 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 [2024-10-24 19:18:46,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:18:46,286 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) [2024-10-24 19:18:46,287 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 [2024-10-24 19:18:46,471 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-24 19:18:46,471 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:18:46,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-24 19:18:46,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:18:46,490 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 [2024-10-24 19:18:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:18:46,959 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:18:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:18:48,813 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:18:48,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136709888] [2024-10-24 19:18:48,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136709888] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:18:48,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:18:48,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-10-24 19:18:48,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391236572] [2024-10-24 19:18:48,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:18:48,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-24 19:18:48,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:18:48,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-24 19:18:48,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-10-24 19:18:49,718 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-10-24 19:18:49,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 91 transitions, 506 flow. Second operand has 26 states, 26 states have (on average 21.76923076923077) internal successors, (566), 26 states have internal predecessors, (566), 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) [2024-10-24 19:18:49,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:18:49,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-10-24 19:18:49,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:19:05,221 INFO L124 PetriNetUnfolderBase]: 2483/4092 cut-off events. [2024-10-24 19:19:05,221 INFO L125 PetriNetUnfolderBase]: For 6935/7583 co-relation queries the response was YES. [2024-10-24 19:19:05,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12791 conditions, 4092 events. 2483/4092 cut-off events. For 6935/7583 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 24244 event pairs, 1975 based on Foata normal form. 636/4660 useless extension candidates. Maximal degree in co-relation 12766. Up to 3598 conditions per place. [2024-10-24 19:19:05,246 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 42 selfloop transitions, 65 changer transitions 0/127 dead transitions. [2024-10-24 19:19:05,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 127 transitions, 1008 flow [2024-10-24 19:19:05,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-10-24 19:19:05,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-10-24 19:19:05,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 1005 transitions. [2024-10-24 19:19:05,249 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37222222222222223 [2024-10-24 19:19:05,250 INFO L175 Difference]: Start difference. First operand has 106 places, 91 transitions, 506 flow. Second operand 45 states and 1005 transitions. [2024-10-24 19:19:05,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 127 transitions, 1008 flow [2024-10-24 19:19:05,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 127 transitions, 970 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-10-24 19:19:05,262 INFO L231 Difference]: Finished difference. Result has 159 places, 127 transitions, 940 flow [2024-10-24 19:19:05,263 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=940, PETRI_PLACES=159, PETRI_TRANSITIONS=127} [2024-10-24 19:19:05,263 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 97 predicate places. [2024-10-24 19:19:05,263 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 127 transitions, 940 flow [2024-10-24 19:19:05,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 21.76923076923077) internal successors, (566), 26 states have internal predecessors, (566), 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) [2024-10-24 19:19:05,264 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:19:05,264 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:19:05,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2024-10-24 19:19:05,465 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 [2024-10-24 19:19:05,466 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-24 19:19:05,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:19:05,466 INFO L85 PathProgramCache]: Analyzing trace with hash -423553134, now seen corresponding path program 2 times [2024-10-24 19:19:05,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:19:05,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699274604] [2024-10-24 19:19:05,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:19:05,467 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 [2024-10-24 19:19:05,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:19:05,470 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) [2024-10-24 19:19:05,471 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 [2024-10-24 19:19:05,550 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:19:05,550 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:19:05,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 19:19:05,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:19:05,565 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 [2024-10-24 19:19:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:19:05,935 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:19:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:19:06,888 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:19:06,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699274604] [2024-10-24 19:19:06,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699274604] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:19:06,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:19:06,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2024-10-24 19:19:06,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939435352] [2024-10-24 19:19:06,888 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:19:06,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 19:19:06,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:19:06,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 19:19:06,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-10-24 19:19:07,869 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-10-24 19:19:07,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 127 transitions, 940 flow. Second operand has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 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) [2024-10-24 19:19:07,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:19:07,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-10-24 19:19:07,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:19:12,796 INFO L124 PetriNetUnfolderBase]: 6844/11289 cut-off events. [2024-10-24 19:19:12,796 INFO L125 PetriNetUnfolderBase]: For 16072/17638 co-relation queries the response was YES. [2024-10-24 19:19:12,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33659 conditions, 11289 events. 6844/11289 cut-off events. For 16072/17638 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 78095 event pairs, 2846 based on Foata normal form. 1210/12360 useless extension candidates. Maximal degree in co-relation 33622. Up to 2781 conditions per place. [2024-10-24 19:19:12,875 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 342 selfloop transitions, 74 changer transitions 0/436 dead transitions. [2024-10-24 19:19:12,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 436 transitions, 3087 flow [2024-10-24 19:19:12,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 19:19:12,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-24 19:19:12,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 643 transitions. [2024-10-24 19:19:12,883 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5103174603174603 [2024-10-24 19:19:12,883 INFO L175 Difference]: Start difference. First operand has 159 places, 127 transitions, 940 flow. Second operand 21 states and 643 transitions. [2024-10-24 19:19:12,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 436 transitions, 3087 flow [2024-10-24 19:19:12,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 436 transitions, 2903 flow, removed 63 selfloop flow, removed 20 redundant places. [2024-10-24 19:19:12,918 INFO L231 Difference]: Finished difference. Result has 163 places, 151 transitions, 1057 flow [2024-10-24 19:19:12,918 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1057, PETRI_PLACES=163, PETRI_TRANSITIONS=151} [2024-10-24 19:19:12,919 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 101 predicate places. [2024-10-24 19:19:12,919 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 151 transitions, 1057 flow [2024-10-24 19:19:12,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 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) [2024-10-24 19:19:12,920 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:19:12,920 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:19:12,928 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 [2024-10-24 19:19:13,120 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 [2024-10-24 19:19:13,120 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-24 19:19:13,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:19:13,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1412465119, now seen corresponding path program 2 times [2024-10-24 19:19:13,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:19:13,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397191676] [2024-10-24 19:19:13,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:19:13,121 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 [2024-10-24 19:19:13,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:19:13,125 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) [2024-10-24 19:19:13,126 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 [2024-10-24 19:19:13,218 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:19:13,218 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:19:13,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 19:19:13,226 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:19:13,238 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 [2024-10-24 19:19:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:19:13,667 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:19:14,461 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:19:14,462 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:19:14,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397191676] [2024-10-24 19:19:14,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397191676] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:19:14,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:19:14,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2024-10-24 19:19:14,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993206128] [2024-10-24 19:19:14,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:19:14,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 19:19:14,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:19:14,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 19:19:14,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-10-24 19:19:15,258 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-10-24 19:19:15,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 151 transitions, 1057 flow. Second operand has 18 states, 18 states have (on average 21.22222222222222) internal successors, (382), 18 states have internal predecessors, (382), 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) [2024-10-24 19:19:15,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:19:15,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-10-24 19:19:15,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:19:19,878 INFO L124 PetriNetUnfolderBase]: 6679/10916 cut-off events. [2024-10-24 19:19:19,879 INFO L125 PetriNetUnfolderBase]: For 27261/29139 co-relation queries the response was YES. [2024-10-24 19:19:19,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37704 conditions, 10916 events. 6679/10916 cut-off events. For 27261/29139 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 73239 event pairs, 2687 based on Foata normal form. 1238/12035 useless extension candidates. Maximal degree in co-relation 37663. Up to 2761 conditions per place. [2024-10-24 19:19:19,953 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 363 selfloop transitions, 75 changer transitions 0/460 dead transitions. [2024-10-24 19:19:19,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 460 transitions, 3721 flow [2024-10-24 19:19:19,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 19:19:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-24 19:19:19,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 626 transitions. [2024-10-24 19:19:19,959 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49682539682539684 [2024-10-24 19:19:19,959 INFO L175 Difference]: Start difference. First operand has 163 places, 151 transitions, 1057 flow. Second operand 21 states and 626 transitions. [2024-10-24 19:19:19,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 460 transitions, 3721 flow [2024-10-24 19:19:19,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 460 transitions, 3597 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-10-24 19:19:20,000 INFO L231 Difference]: Finished difference. Result has 185 places, 175 transitions, 1358 flow [2024-10-24 19:19:20,000 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1358, PETRI_PLACES=185, PETRI_TRANSITIONS=175} [2024-10-24 19:19:20,001 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 123 predicate places. [2024-10-24 19:19:20,001 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 175 transitions, 1358 flow [2024-10-24 19:19:20,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 21.22222222222222) internal successors, (382), 18 states have internal predecessors, (382), 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) [2024-10-24 19:19:20,001 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:19:20,001 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:19:20,009 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 [2024-10-24 19:19:20,202 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 [2024-10-24 19:19:20,202 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-24 19:19:20,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:19:20,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1745078190, now seen corresponding path program 3 times [2024-10-24 19:19:20,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:19:20,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830179736] [2024-10-24 19:19:20,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 19:19:20,203 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 [2024-10-24 19:19:20,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:19:20,270 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) [2024-10-24 19:19:20,278 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 [2024-10-24 19:19:20,477 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-24 19:19:20,477 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:19:20,481 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-24 19:19:20,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:19:20,494 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 [2024-10-24 19:19:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 19:19:21,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:19:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 19:19:37,411 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:19:37,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830179736] [2024-10-24 19:19:37,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830179736] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:19:37,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:19:37,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2024-10-24 19:19:37,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966022912] [2024-10-24 19:19:37,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:19:37,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-24 19:19:37,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:19:37,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-24 19:19:37,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=308, Unknown=2, NotChecked=0, Total=380 [2024-10-24 19:19:41,018 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 60 [2024-10-24 19:19:41,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 175 transitions, 1358 flow. Second operand has 20 states, 20 states have (on average 20.0) internal successors, (400), 20 states have internal predecessors, (400), 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) [2024-10-24 19:19:41,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:19:41,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 60 [2024-10-24 19:19:41,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:19:45,643 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse7 (bvmul (_ bv4 32) c_thread1Thread1of1ForFork2_~i~0))) (let ((.cse4 (bvadd (_ bv8 32) c_~A~0.offset .cse7)) (.cse5 (bvadd (_ bv12 32) c_~A~0.offset .cse7)) (.cse2 (select |c_#length| c_~A~0.base))) (let ((.cse3 (bvule .cse5 .cse2)) (.cse6 (bvadd (_ bv4 32) c_~A~0.offset .cse7)) (.cse8 (not (bvule .cse4 .cse2)))) (and (forall ((thread1Thread1of1ForFork2_~i~0 (_ BitVec 32))) (let ((.cse0 (bvmul thread1Thread1of1ForFork2_~i~0 (_ bv4 32)))) (let ((.cse1 (bvadd .cse0 (_ bv4 32) c_~A~0.offset))) (or (not (bvule (bvadd .cse0 c_~A~0.offset) .cse1)) (not (bvule (bvadd .cse0 (_ bv12 32) c_~A~0.offset) .cse2)) (not (bvule .cse1 .cse2)) (bvule (bvadd .cse0 (_ bv16 32) c_~A~0.offset) .cse2))))) (or (and .cse3 (bvule .cse4 .cse5)) (not (bvule .cse6 .cse2)) (not (bvule (bvadd c_~A~0.offset .cse7) .cse6)) .cse8) (or (not .cse3) (let ((.cse9 (bvadd (_ bv16 32) c_~A~0.offset .cse7))) (and (bvule .cse9 .cse2) (bvule .cse5 .cse9))) (not (bvule .cse6 .cse4)) .cse8) (forall ((thread1Thread1of1ForFork2_~i~0 (_ BitVec 32))) (let ((.cse11 (bvmul thread1Thread1of1ForFork2_~i~0 (_ bv4 32)))) (let ((.cse10 (bvadd .cse11 (_ bv12 32) c_~A~0.offset))) (or (not (bvule .cse10 .cse2)) (bvule .cse10 (bvadd .cse11 (_ bv16 32) c_~A~0.offset)))))))))) is different from false [2024-10-24 19:19:50,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-24 19:19:54,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-24 19:19:58,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-24 19:20:03,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-24 19:20:07,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1]