./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/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:49:32,209 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:49:32,292 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:49:32,297 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:49:32,299 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:49:32,327 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:49:32,328 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:49:32,328 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:49:32,329 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:49:32,329 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:49:32,330 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:49:32,330 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:49:32,331 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:49:32,331 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:49:32,331 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:49:32,333 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:49:32,334 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:49:32,334 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:49:32,335 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:49:32,335 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:49:32,335 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:49:32,336 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:49:32,336 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:49:32,336 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:49:32,337 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:49:32,337 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:49:32,337 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:49:32,338 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:49:32,338 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:49:32,338 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:49:32,339 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:49:32,339 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:49:32,339 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:49:32,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:49:32,340 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:49:32,340 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:49:32,340 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:49:32,341 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:49:32,341 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:49:32,341 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:49:32,342 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:49:32,343 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:49:32,343 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2024-10-11 19:49:32,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:49:32,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:49:32,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:49:32,620 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:49:32,621 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:49:32,622 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-10-11 19:49:34,025 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:49:34,232 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:49:34,232 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-10-11 19:49:34,239 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/4d241f7e7/d262f690acc84ba888d6282152a4071a/FLAG592182491 [2024-10-11 19:49:34,250 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/4d241f7e7/d262f690acc84ba888d6282152a4071a [2024-10-11 19:49:34,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:49:34,253 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:49:34,254 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:49:34,254 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:49:34,260 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:49:34,260 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:49:34" (1/1) ... [2024-10-11 19:49:34,261 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@447504c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:49:34, skipping insertion in model container [2024-10-11 19:49:34,261 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:49:34" (1/1) ... [2024-10-11 19:49:34,284 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:49:34,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:49:34,506 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) [2024-10-11 19:49:34,507 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5f82d5b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:49:34, skipping insertion in model container [2024-10-11 19:49:34,507 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:49:34,507 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-11 19:49:34,509 INFO L158 Benchmark]: Toolchain (without parser) took 254.77ms. Allocated memory is still 142.6MB. Free memory was 94.6MB in the beginning and 82.9MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-11 19:49:34,509 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 142.6MB. Free memory is still 102.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-11 19:49:34,510 INFO L158 Benchmark]: CACSL2BoogieTranslator took 252.91ms. Allocated memory is still 142.6MB. Free memory was 94.6MB in the beginning and 82.9MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-11 19:49:34,511 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 142.6MB. Free memory is still 102.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 252.91ms. Allocated memory is still 142.6MB. Free memory was 94.6MB in the beginning and 82.9MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 94]: 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-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:49:36,498 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:49:36,584 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-11 19:49:36,590 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:49:36,591 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:49:36,624 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:49:36,624 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:49:36,625 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:49:36,625 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:49:36,627 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:49:36,627 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:49:36,627 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:49:36,628 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:49:36,628 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:49:36,630 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:49:36,630 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:49:36,631 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:49:36,631 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:49:36,631 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:49:36,631 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:49:36,632 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:49:36,635 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:49:36,636 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:49:36,636 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:49:36,636 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:49:36,636 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-11 19:49:36,637 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:49:36,637 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-11 19:49:36,637 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:49:36,637 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:49:36,637 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:49:36,638 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:49:36,638 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:49:36,638 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:49:36,638 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:49:36,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:49:36,639 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:49:36,641 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:49:36,641 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-11 19:49:36,641 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-11 19:49:36,642 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:49:36,642 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:49:36,642 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:49:36,642 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:49:36,643 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-11 19:49:36,643 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2024-10-11 19:49:36,984 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:49:37,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:49:37,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:49:37,014 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:49:37,015 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:49:37,017 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-10-11 19:49:38,588 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:49:38,805 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:49:38,806 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-10-11 19:49:38,819 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/4df88dd5d/d45b7cfe0ce54b86a19572021ae4001f/FLAGde19f6b9f [2024-10-11 19:49:39,178 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/4df88dd5d/d45b7cfe0ce54b86a19572021ae4001f [2024-10-11 19:49:39,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:49:39,182 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:49:39,183 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:49:39,183 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:49:39,188 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:49:39,188 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:49:39" (1/1) ... [2024-10-11 19:49:39,189 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63369efd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:49:39, skipping insertion in model container [2024-10-11 19:49:39,189 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:49:39" (1/1) ... [2024-10-11 19:49:39,207 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:49:39,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:49:39,419 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-11 19:49:39,422 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:49:39,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:49:39,441 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:49:39,460 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:49:39,480 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:49:39,481 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:49:39 WrapperNode [2024-10-11 19:49:39,481 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:49:39,483 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:49:39,483 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:49:39,483 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:49:39,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:49:39" (1/1) ... [2024-10-11 19:49:39,498 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:49:39" (1/1) ... [2024-10-11 19:49:39,517 INFO L138 Inliner]: procedures = 24, calls = 20, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 103 [2024-10-11 19:49:39,518 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:49:39,519 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:49:39,519 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:49:39,519 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:49:39,528 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:49:39" (1/1) ... [2024-10-11 19:49:39,529 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:49:39" (1/1) ... [2024-10-11 19:49:39,533 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:49:39" (1/1) ... [2024-10-11 19:49:39,550 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-11 19:49:39,550 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:49:39" (1/1) ... [2024-10-11 19:49:39,551 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:49:39" (1/1) ... [2024-10-11 19:49:39,566 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:49:39" (1/1) ... [2024-10-11 19:49:39,574 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:49:39" (1/1) ... [2024-10-11 19:49:39,579 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:49:39" (1/1) ... [2024-10-11 19:49:39,580 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:49:39" (1/1) ... [2024-10-11 19:49:39,587 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:49:39,591 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:49:39,591 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:49:39,592 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:49:39,592 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:49:39" (1/1) ... [2024-10-11 19:49:39,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:49:39,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:49:39,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:49:39,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:49:39,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:49:39,682 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 19:49:39,682 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 19:49:39,682 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 19:49:39,682 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 19:49:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-11 19:49:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-11 19:49:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 19:49:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-11 19:49:39,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-11 19:49:39,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:49:39,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:49:39,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-11 19:49:39,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-11 19:49:39,686 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:49:39,795 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:49:39,798 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:49:40,254 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:49:40,254 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:49:40,519 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:49:40,520 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-11 19:49:40,520 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:49:40 BoogieIcfgContainer [2024-10-11 19:49:40,520 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:49:40,522 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:49:40,522 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:49:40,525 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:49:40,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:49:39" (1/3) ... [2024-10-11 19:49:40,526 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c2d6055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:49:40, skipping insertion in model container [2024-10-11 19:49:40,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:49:39" (2/3) ... [2024-10-11 19:49:40,527 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c2d6055 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:49:40, skipping insertion in model container [2024-10-11 19:49:40,527 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:49:40" (3/3) ... [2024-10-11 19:49:40,529 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2024-10-11 19:49:40,545 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:49:40,546 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-10-11 19:49:40,546 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:49:40,601 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 19:49:40,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 110 flow [2024-10-11 19:49:40,677 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2024-10-11 19:49:40,678 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 19:49:40,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 6/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 103 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-10-11 19:49:40,681 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 48 transitions, 110 flow [2024-10-11 19:49:40,685 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 45 transitions, 102 flow [2024-10-11 19:49:40,699 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:49:40,707 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;@160597e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:49:40,707 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-10-11 19:49:40,712 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:49:40,712 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-11 19:49:40,712 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:49:40,712 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:49:40,713 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:49:40,714 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:49:40,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:49:40,719 INFO L85 PathProgramCache]: Analyzing trace with hash 459561, now seen corresponding path program 1 times [2024-10-11 19:49:40,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:49:40,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013574357] [2024-10-11 19:49:40,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:49:40,731 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 [2024-10-11 19:49:40,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:49:40,735 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:49:40,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:49:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:49:40,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 19:49:40,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:49:40,873 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 [2024-10-11 19:49:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:40,891 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:49:40,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:49:40,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013574357] [2024-10-11 19:49:40,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013574357] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:49:40,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:49:40,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:49:40,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899882399] [2024-10-11 19:49:40,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:49:40,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:49:40,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:49:40,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:49:40,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:49:40,994 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-10-11 19:49:40,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2024-10-11 19:49:40,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:49:40,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-10-11 19:49:40,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:49:41,144 INFO L124 PetriNetUnfolderBase]: 101/218 cut-off events. [2024-10-11 19:49:41,144 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-10-11 19:49:41,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 218 events. 101/218 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 810 event pairs, 35 based on Foata normal form. 1/130 useless extension candidates. Maximal degree in co-relation 329. Up to 143 conditions per place. [2024-10-11 19:49:41,149 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 20 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-10-11 19:49:41,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 138 flow [2024-10-11 19:49:41,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:49:41,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:49:41,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-10-11 19:49:41,160 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6319444444444444 [2024-10-11 19:49:41,162 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 102 flow. Second operand 3 states and 91 transitions. [2024-10-11 19:49:41,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 138 flow [2024-10-11 19:49:41,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 130 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 19:49:41,166 INFO L231 Difference]: Finished difference. Result has 40 places, 41 transitions, 90 flow [2024-10-11 19:49:41,168 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=40, PETRI_TRANSITIONS=41} [2024-10-11 19:49:41,174 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -6 predicate places. [2024-10-11 19:49:41,174 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 41 transitions, 90 flow [2024-10-11 19:49:41,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2024-10-11 19:49:41,175 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:49:41,175 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:49:41,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:49:41,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:49:41,376 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:49:41,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:49:41,377 INFO L85 PathProgramCache]: Analyzing trace with hash 459562, now seen corresponding path program 1 times [2024-10-11 19:49:41,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:49:41,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769931812] [2024-10-11 19:49:41,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:49:41,378 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 [2024-10-11 19:49:41,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:49:41,381 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:49:41,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:49:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:49:41,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 19:49:41,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:49:41,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-11 19:49:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:41,549 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:49:41,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:49:41,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769931812] [2024-10-11 19:49:41,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769931812] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:49:41,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:49:41,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:49:41,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104307154] [2024-10-11 19:49:41,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:49:41,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:49:41,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:49:41,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:49:41,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:49:41,699 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-10-11 19:49:41,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 41 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2024-10-11 19:49:41,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:49:41,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-10-11 19:49:41,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:49:41,884 INFO L124 PetriNetUnfolderBase]: 103/224 cut-off events. [2024-10-11 19:49:41,885 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 19:49:41,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 224 events. 103/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 831 event pairs, 35 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 355. Up to 152 conditions per place. [2024-10-11 19:49:41,887 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 23 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2024-10-11 19:49:41,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 164 flow [2024-10-11 19:49:41,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:49:41,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:49:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-10-11 19:49:41,890 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-11 19:49:41,890 INFO L175 Difference]: Start difference. First operand has 40 places, 41 transitions, 90 flow. Second operand 4 states and 120 transitions. [2024-10-11 19:49:41,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 164 flow [2024-10-11 19:49:41,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:49:41,892 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 142 flow [2024-10-11 19:49:41,893 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2024-10-11 19:49:41,893 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -2 predicate places. [2024-10-11 19:49:41,894 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 142 flow [2024-10-11 19:49:41,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2024-10-11 19:49:41,894 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:49:41,894 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-11 19:49:41,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:49:42,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:49:42,096 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:49:42,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:49:42,096 INFO L85 PathProgramCache]: Analyzing trace with hash 441652740, now seen corresponding path program 1 times [2024-10-11 19:49:42,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:49:42,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237672384] [2024-10-11 19:49:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:49:42,097 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 [2024-10-11 19:49:42,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:49:42,100 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:49:42,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:49:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:49:42,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 19:49:42,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:49:42,206 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 [2024-10-11 19:49:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:42,373 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:49:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:42,632 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:49:42,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237672384] [2024-10-11 19:49:42,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237672384] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:49:42,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:49:42,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-11 19:49:42,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416130861] [2024-10-11 19:49:42,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:49:42,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 19:49:42,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:49:42,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 19:49:42,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:49:43,158 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-10-11 19:49:43,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 142 flow. Second operand has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 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) [2024-10-11 19:49:43,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:49:43,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-10-11 19:49:43,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:49:43,937 INFO L124 PetriNetUnfolderBase]: 109/242 cut-off events. [2024-10-11 19:49:43,937 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-10-11 19:49:43,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 469 conditions, 242 events. 109/242 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 941 event pairs, 35 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 366. Up to 155 conditions per place. [2024-10-11 19:49:43,939 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 23 selfloop transitions, 25 changer transitions 0/65 dead transitions. [2024-10-11 19:49:43,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 65 transitions, 316 flow [2024-10-11 19:49:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 19:49:43,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 19:49:43,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2024-10-11 19:49:43,943 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-10-11 19:49:43,944 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 142 flow. Second operand 10 states and 274 transitions. [2024-10-11 19:49:43,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 65 transitions, 316 flow [2024-10-11 19:49:43,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 65 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:49:43,946 INFO L231 Difference]: Finished difference. Result has 56 places, 65 transitions, 304 flow [2024-10-11 19:49:43,946 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=304, PETRI_PLACES=56, PETRI_TRANSITIONS=65} [2024-10-11 19:49:43,947 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2024-10-11 19:49:43,947 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 65 transitions, 304 flow [2024-10-11 19:49:43,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.0) internal successors, (230), 10 states have internal predecessors, (230), 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) [2024-10-11 19:49:43,948 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:49:43,948 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:49:43,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:49:44,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:49:44,149 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:49:44,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:49:44,150 INFO L85 PathProgramCache]: Analyzing trace with hash -728139643, now seen corresponding path program 1 times [2024-10-11 19:49:44,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:49:44,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709889969] [2024-10-11 19:49:44,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:49:44,151 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 [2024-10-11 19:49:44,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:49:44,153 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:49:44,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:49:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:49:44,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 19:49:44,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:49:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:44,274 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:49:44,274 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:49:44,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709889969] [2024-10-11 19:49:44,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709889969] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:49:44,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:49:44,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:49:44,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038354273] [2024-10-11 19:49:44,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:49:44,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:49:44,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:49:44,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:49:44,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:49:44,321 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-10-11 19:49:44,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 65 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-11 19:49:44,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:49:44,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-10-11 19:49:44,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:49:44,455 INFO L124 PetriNetUnfolderBase]: 171/405 cut-off events. [2024-10-11 19:49:44,455 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-10-11 19:49:44,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 837 conditions, 405 events. 171/405 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1972 event pairs, 71 based on Foata normal form. 0/266 useless extension candidates. Maximal degree in co-relation 749. Up to 187 conditions per place. [2024-10-11 19:49:44,459 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 72 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2024-10-11 19:49:44,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 93 transitions, 586 flow [2024-10-11 19:49:44,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:49:44,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:49:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-10-11 19:49:44,461 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.703125 [2024-10-11 19:49:44,461 INFO L175 Difference]: Start difference. First operand has 56 places, 65 transitions, 304 flow. Second operand 4 states and 135 transitions. [2024-10-11 19:49:44,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 93 transitions, 586 flow [2024-10-11 19:49:44,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 93 transitions, 492 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-10-11 19:49:44,467 INFO L231 Difference]: Finished difference. Result has 56 places, 65 transitions, 249 flow [2024-10-11 19:49:44,468 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=56, PETRI_TRANSITIONS=65} [2024-10-11 19:49:44,468 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2024-10-11 19:49:44,468 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 65 transitions, 249 flow [2024-10-11 19:49:44,469 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-10-11 19:49:44,469 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:49:44,469 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:49:44,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:49:44,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:49:44,670 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:49:44,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:49:44,670 INFO L85 PathProgramCache]: Analyzing trace with hash -225669537, now seen corresponding path program 1 times [2024-10-11 19:49:44,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:49:44,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859987475] [2024-10-11 19:49:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:49:44,671 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 [2024-10-11 19:49:44,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:49:44,678 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:49:44,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:49:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:49:44,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 19:49:44,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:49:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:49:44,823 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:49:44,823 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:49:44,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859987475] [2024-10-11 19:49:44,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859987475] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:49:44,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:49:44,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:49:44,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697111223] [2024-10-11 19:49:44,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:49:44,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:49:44,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:49:44,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:49:44,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:49:44,883 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-10-11 19:49:44,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 65 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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) [2024-10-11 19:49:44,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:49:44,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-10-11 19:49:44,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:49:45,079 INFO L124 PetriNetUnfolderBase]: 343/816 cut-off events. [2024-10-11 19:49:45,079 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-10-11 19:49:45,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1514 conditions, 816 events. 343/816 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4811 event pairs, 117 based on Foata normal form. 8/557 useless extension candidates. Maximal degree in co-relation 1438. Up to 239 conditions per place. [2024-10-11 19:49:45,087 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 66 selfloop transitions, 9 changer transitions 0/93 dead transitions. [2024-10-11 19:49:45,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 93 transitions, 464 flow [2024-10-11 19:49:45,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:49:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:49:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2024-10-11 19:49:45,088 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-10-11 19:49:45,088 INFO L175 Difference]: Start difference. First operand has 56 places, 65 transitions, 249 flow. Second operand 5 states and 170 transitions. [2024-10-11 19:49:45,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 93 transitions, 464 flow [2024-10-11 19:49:45,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 93 transitions, 460 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 19:49:45,093 INFO L231 Difference]: Finished difference. Result has 61 places, 66 transitions, 278 flow [2024-10-11 19:49:45,093 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=61, PETRI_TRANSITIONS=66} [2024-10-11 19:49:45,093 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2024-10-11 19:49:45,094 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 66 transitions, 278 flow [2024-10-11 19:49:45,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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) [2024-10-11 19:49:45,094 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:49:45,094 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:49:45,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2024-10-11 19:49:45,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:49:45,296 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:49:45,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:49:45,296 INFO L85 PathProgramCache]: Analyzing trace with hash 330879789, now seen corresponding path program 1 times [2024-10-11 19:49:45,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:49:45,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1620990088] [2024-10-11 19:49:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:49:45,297 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 [2024-10-11 19:49:45,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:49:45,298 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:49:45,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:49:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:49:45,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 19:49:45,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:49:45,375 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 [2024-10-11 19:49:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:45,400 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:49:45,400 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:49:45,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1620990088] [2024-10-11 19:49:45,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1620990088] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:49:45,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:49:45,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:49:45,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061528011] [2024-10-11 19:49:45,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:49:45,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:49:45,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:49:45,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:49:45,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:49:45,462 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-11 19:49:45,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 66 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-10-11 19:49:45,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:49:45,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-11 19:49:45,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:49:45,605 INFO L124 PetriNetUnfolderBase]: 367/807 cut-off events. [2024-10-11 19:49:45,606 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-10-11 19:49:45,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 807 events. 367/807 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4579 event pairs, 212 based on Foata normal form. 0/674 useless extension candidates. Maximal degree in co-relation 1542. Up to 595 conditions per place. [2024-10-11 19:49:45,610 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 43 selfloop transitions, 6 changer transitions 0/64 dead transitions. [2024-10-11 19:49:45,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 64 transitions, 372 flow [2024-10-11 19:49:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:49:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:49:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-10-11 19:49:45,612 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-10-11 19:49:45,613 INFO L175 Difference]: Start difference. First operand has 61 places, 66 transitions, 278 flow. Second operand 4 states and 98 transitions. [2024-10-11 19:49:45,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 64 transitions, 372 flow [2024-10-11 19:49:45,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:49:45,619 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 276 flow [2024-10-11 19:49:45,619 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=276, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2024-10-11 19:49:45,620 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2024-10-11 19:49:45,620 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 276 flow [2024-10-11 19:49:45,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-10-11 19:49:45,620 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:49:45,621 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:49:45,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:49:45,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:49:45,822 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:49:45,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:49:45,822 INFO L85 PathProgramCache]: Analyzing trace with hash 330879790, now seen corresponding path program 1 times [2024-10-11 19:49:45,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:49:45,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860744388] [2024-10-11 19:49:45,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:49:45,823 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 [2024-10-11 19:49:45,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:49:45,825 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:49:45,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:49:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:49:45,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 19:49:45,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:49:45,897 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 [2024-10-11 19:49:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:46,060 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:49:46,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:49:46,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860744388] [2024-10-11 19:49:46,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860744388] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:49:46,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:49:46,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:49:46,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121790423] [2024-10-11 19:49:46,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:49:46,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 19:49:46,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:49:46,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 19:49:46,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-11 19:49:46,206 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-10-11 19:49:46,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:49:46,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:49:46,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-10-11 19:49:46,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:49:46,567 INFO L124 PetriNetUnfolderBase]: 772/1657 cut-off events. [2024-10-11 19:49:46,568 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2024-10-11 19:49:46,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3227 conditions, 1657 events. 772/1657 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10718 event pairs, 99 based on Foata normal form. 0/1282 useless extension candidates. Maximal degree in co-relation 3146. Up to 647 conditions per place. [2024-10-11 19:49:46,577 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 65 selfloop transitions, 14 changer transitions 0/92 dead transitions. [2024-10-11 19:49:46,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 92 transitions, 499 flow [2024-10-11 19:49:46,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:49:46,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:49:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-10-11 19:49:46,579 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-10-11 19:49:46,579 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 276 flow. Second operand 6 states and 174 transitions. [2024-10-11 19:49:46,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 92 transitions, 499 flow [2024-10-11 19:49:46,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 492 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:49:46,600 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 321 flow [2024-10-11 19:49:46,602 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=321, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-10-11 19:49:46,603 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 19 predicate places. [2024-10-11 19:49:46,603 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 321 flow [2024-10-11 19:49:46,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.333333333333332) internal successors, (128), 6 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:49:46,604 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:49:46,604 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:49:46,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2024-10-11 19:49:46,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:49:46,808 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:49:46,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:49:46,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1667339291, now seen corresponding path program 1 times [2024-10-11 19:49:46,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:49:46,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578220559] [2024-10-11 19:49:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:49:46,809 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 [2024-10-11 19:49:46,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:49:46,810 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:49:46,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:49:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:49:46,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 19:49:46,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:49:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:46,954 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:49:46,954 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:49:46,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578220559] [2024-10-11 19:49:46,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578220559] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:49:46,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:49:46,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:49:46,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596333084] [2024-10-11 19:49:46,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:49:46,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:49:46,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:49:46,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:49:46,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:49:47,012 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-10-11 19:49:47,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-10-11 19:49:47,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:49:47,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-10-11 19:49:47,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:49:47,196 INFO L124 PetriNetUnfolderBase]: 440/961 cut-off events. [2024-10-11 19:49:47,196 INFO L125 PetriNetUnfolderBase]: For 276/290 co-relation queries the response was YES. [2024-10-11 19:49:47,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2125 conditions, 961 events. 440/961 cut-off events. For 276/290 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5560 event pairs, 282 based on Foata normal form. 10/864 useless extension candidates. Maximal degree in co-relation 2039. Up to 661 conditions per place. [2024-10-11 19:49:47,203 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 73 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2024-10-11 19:49:47,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 93 transitions, 595 flow [2024-10-11 19:49:47,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:49:47,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:49:47,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-10-11 19:49:47,204 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6927083333333334 [2024-10-11 19:49:47,205 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 321 flow. Second operand 4 states and 133 transitions. [2024-10-11 19:49:47,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 93 transitions, 595 flow [2024-10-11 19:49:47,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 93 transitions, 572 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:49:47,209 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 312 flow [2024-10-11 19:49:47,210 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2024-10-11 19:49:47,211 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 20 predicate places. [2024-10-11 19:49:47,211 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 312 flow [2024-10-11 19:49:47,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-10-11 19:49:47,212 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:49:47,212 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:49:47,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2024-10-11 19:49:47,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:49:47,415 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:49:47,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:49:47,416 INFO L85 PathProgramCache]: Analyzing trace with hash 117102865, now seen corresponding path program 1 times [2024-10-11 19:49:47,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:49:47,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022703252] [2024-10-11 19:49:47,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:49:47,417 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 [2024-10-11 19:49:47,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:49:47,418 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:49:47,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:49:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:49:47,498 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 19:49:47,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:49:47,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-11 19:49:47,528 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 [2024-10-11 19:49:47,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:49:47,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-11 19:49:47,706 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:49:47,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-11 19:49:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:49:47,860 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:49:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:49:48,350 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:49:48,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022703252] [2024-10-11 19:49:48,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022703252] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:49:48,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:49:48,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-11 19:49:48,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707800328] [2024-10-11 19:49:48,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:49:48,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 19:49:48,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:49:48,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 19:49:48,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:49:49,596 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-11 19:49:49,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 312 flow. Second operand has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 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) [2024-10-11 19:49:49,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:49:49,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-11 19:49:49,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:49:51,118 INFO L124 PetriNetUnfolderBase]: 978/2043 cut-off events. [2024-10-11 19:49:51,118 INFO L125 PetriNetUnfolderBase]: For 344/361 co-relation queries the response was YES. [2024-10-11 19:49:51,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4359 conditions, 2043 events. 978/2043 cut-off events. For 344/361 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13789 event pairs, 577 based on Foata normal form. 0/1723 useless extension candidates. Maximal degree in co-relation 4037. Up to 701 conditions per place. [2024-10-11 19:49:51,133 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 73 selfloop transitions, 54 changer transitions 0/142 dead transitions. [2024-10-11 19:49:51,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 142 transitions, 919 flow [2024-10-11 19:49:51,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 19:49:51,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-11 19:49:51,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 369 transitions. [2024-10-11 19:49:51,136 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-10-11 19:49:51,136 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 312 flow. Second operand 15 states and 369 transitions. [2024-10-11 19:49:51,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 142 transitions, 919 flow [2024-10-11 19:49:51,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 142 transitions, 914 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:49:51,162 INFO L231 Difference]: Finished difference. Result has 89 places, 101 transitions, 738 flow [2024-10-11 19:49:51,162 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=738, PETRI_PLACES=89, PETRI_TRANSITIONS=101} [2024-10-11 19:49:51,163 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 43 predicate places. [2024-10-11 19:49:51,163 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 101 transitions, 738 flow [2024-10-11 19:49:51,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 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) [2024-10-11 19:49:51,163 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:49:51,163 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-11 19:49:51,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:49:51,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:49:51,369 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:49:51,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:49:51,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1566439314, now seen corresponding path program 2 times [2024-10-11 19:49:51,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:49:51,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54292606] [2024-10-11 19:49:51,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:49:51,369 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 [2024-10-11 19:49:51,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:49:51,372 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:49:51,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:49:51,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:49:51,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:49:51,435 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 19:49:51,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:49:51,447 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 [2024-10-11 19:49:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:51,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:49:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:49:52,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:49:52,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54292606] [2024-10-11 19:49:52,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54292606] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:49:52,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:49:52,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-11 19:49:52,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113864785] [2024-10-11 19:49:52,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:49:52,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:49:52,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:49:52,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:49:52,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:49:53,659 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-10-11 19:49:53,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 101 transitions, 738 flow. Second operand has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 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) [2024-10-11 19:49:53,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:49:53,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-10-11 19:49:53,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:49:58,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-11 19:50:00,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-11 19:50:02,451 INFO L124 PetriNetUnfolderBase]: 835/1829 cut-off events. [2024-10-11 19:50:02,451 INFO L125 PetriNetUnfolderBase]: For 940/980 co-relation queries the response was YES. [2024-10-11 19:50:02,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4518 conditions, 1829 events. 835/1829 cut-off events. For 940/980 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12405 event pairs, 541 based on Foata normal form. 30/1612 useless extension candidates. Maximal degree in co-relation 4338. Up to 1451 conditions per place. [2024-10-11 19:50:02,464 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 30 selfloop transitions, 113 changer transitions 0/161 dead transitions. [2024-10-11 19:50:02,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 161 transitions, 1528 flow [2024-10-11 19:50:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 19:50:02,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-11 19:50:02,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 580 transitions. [2024-10-11 19:50:02,468 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5492424242424242 [2024-10-11 19:50:02,468 INFO L175 Difference]: Start difference. First operand has 89 places, 101 transitions, 738 flow. Second operand 22 states and 580 transitions. [2024-10-11 19:50:02,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 161 transitions, 1528 flow [2024-10-11 19:50:02,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 161 transitions, 1528 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:50:02,477 INFO L231 Difference]: Finished difference. Result has 116 places, 161 transitions, 1558 flow [2024-10-11 19:50:02,478 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1558, PETRI_PLACES=116, PETRI_TRANSITIONS=161} [2024-10-11 19:50:02,478 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 70 predicate places. [2024-10-11 19:50:02,479 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 161 transitions, 1558 flow [2024-10-11 19:50:02,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 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) [2024-10-11 19:50:02,479 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:02,479 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:02,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:50:02,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:50:02,683 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:50:02,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:02,684 INFO L85 PathProgramCache]: Analyzing trace with hash 117102864, now seen corresponding path program 1 times [2024-10-11 19:50:02,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:02,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598938179] [2024-10-11 19:50:02,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:02,684 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 [2024-10-11 19:50:02,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:02,685 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:50:02,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:50:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:02,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 19:50:02,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:02,781 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 [2024-10-11 19:50:02,816 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-11 19:50:02,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-10-11 19:50:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 19:50:02,835 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:50:02,835 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:02,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598938179] [2024-10-11 19:50:02,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598938179] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:50:02,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:50:02,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:50:02,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855445089] [2024-10-11 19:50:02,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:50:02,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:50:02,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:02,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:50:02,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:50:02,908 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-11 19:50:02,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 161 transitions, 1558 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) [2024-10-11 19:50:02,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:02,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-11 19:50:02,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:03,230 INFO L124 PetriNetUnfolderBase]: 1096/2324 cut-off events. [2024-10-11 19:50:03,230 INFO L125 PetriNetUnfolderBase]: For 1171/1196 co-relation queries the response was YES. [2024-10-11 19:50:03,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5884 conditions, 2324 events. 1096/2324 cut-off events. For 1171/1196 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 16214 event pairs, 776 based on Foata normal form. 80/2311 useless extension candidates. Maximal degree in co-relation 5659. Up to 1842 conditions per place. [2024-10-11 19:50:03,247 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 113 selfloop transitions, 31 changer transitions 0/159 dead transitions. [2024-10-11 19:50:03,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 159 transitions, 1842 flow [2024-10-11 19:50:03,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:50:03,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:50:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-10-11 19:50:03,248 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-10-11 19:50:03,249 INFO L175 Difference]: Start difference. First operand has 116 places, 161 transitions, 1558 flow. Second operand 5 states and 116 transitions. [2024-10-11 19:50:03,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 159 transitions, 1842 flow [2024-10-11 19:50:03,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 1550 flow, removed 87 selfloop flow, removed 9 redundant places. [2024-10-11 19:50:03,264 INFO L231 Difference]: Finished difference. Result has 109 places, 159 transitions, 1324 flow [2024-10-11 19:50:03,264 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1262, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1324, PETRI_PLACES=109, PETRI_TRANSITIONS=159} [2024-10-11 19:50:03,265 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 63 predicate places. [2024-10-11 19:50:03,265 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 159 transitions, 1324 flow [2024-10-11 19:50:03,265 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) [2024-10-11 19:50:03,265 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:03,265 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:03,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:50:03,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:50:03,469 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:50:03,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:03,470 INFO L85 PathProgramCache]: Analyzing trace with hash -664778099, now seen corresponding path program 1 times [2024-10-11 19:50:03,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:03,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [463408505] [2024-10-11 19:50:03,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:03,470 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 [2024-10-11 19:50:03,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:03,474 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:50:03,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:50:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:03,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:50:03,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:50:03,668 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:50:03,778 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 35 treesize of output 31 [2024-10-11 19:50:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:50:03,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:03,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [463408505] [2024-10-11 19:50:03,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [463408505] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:50:03,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:50:03,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-11 19:50:03,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610748361] [2024-10-11 19:50:03,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:50:03,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 19:50:03,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:03,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 19:50:03,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:50:04,265 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-10-11 19:50:04,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 159 transitions, 1324 flow. Second operand has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 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) [2024-10-11 19:50:04,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:04,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-10-11 19:50:04,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:04,932 INFO L124 PetriNetUnfolderBase]: 896/1917 cut-off events. [2024-10-11 19:50:04,933 INFO L125 PetriNetUnfolderBase]: For 918/924 co-relation queries the response was YES. [2024-10-11 19:50:04,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4882 conditions, 1917 events. 896/1917 cut-off events. For 918/924 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12823 event pairs, 472 based on Foata normal form. 32/1765 useless extension candidates. Maximal degree in co-relation 4680. Up to 697 conditions per place. [2024-10-11 19:50:04,946 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 141 selfloop transitions, 44 changer transitions 0/200 dead transitions. [2024-10-11 19:50:04,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 200 transitions, 1800 flow [2024-10-11 19:50:04,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:50:04,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:50:04,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 252 transitions. [2024-10-11 19:50:04,949 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-10-11 19:50:04,949 INFO L175 Difference]: Start difference. First operand has 109 places, 159 transitions, 1324 flow. Second operand 8 states and 252 transitions. [2024-10-11 19:50:04,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 200 transitions, 1800 flow [2024-10-11 19:50:04,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 200 transitions, 1757 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:50:04,960 INFO L231 Difference]: Finished difference. Result has 115 places, 160 transitions, 1400 flow [2024-10-11 19:50:04,961 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1281, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1400, PETRI_PLACES=115, PETRI_TRANSITIONS=160} [2024-10-11 19:50:04,962 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 69 predicate places. [2024-10-11 19:50:04,963 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 160 transitions, 1400 flow [2024-10-11 19:50:04,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.8) internal successors, (238), 10 states have internal predecessors, (238), 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) [2024-10-11 19:50:04,964 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:04,964 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:04,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2024-10-11 19:50:05,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:50:05,165 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:50:05,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:05,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1501726718, now seen corresponding path program 1 times [2024-10-11 19:50:05,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:05,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674948788] [2024-10-11 19:50:05,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:05,166 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 [2024-10-11 19:50:05,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:05,167 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:50:05,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:50:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:05,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 19:50:05,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:50:05,423 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:50:05,423 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:05,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674948788] [2024-10-11 19:50:05,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674948788] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:50:05,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:50:05,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:50:05,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008747840] [2024-10-11 19:50:05,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:50:05,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:50:05,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:05,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:50:05,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:50:05,464 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-10-11 19:50:05,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 160 transitions, 1400 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 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) [2024-10-11 19:50:05,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:05,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-10-11 19:50:05,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:05,750 INFO L124 PetriNetUnfolderBase]: 761/1688 cut-off events. [2024-10-11 19:50:05,750 INFO L125 PetriNetUnfolderBase]: For 1863/1877 co-relation queries the response was YES. [2024-10-11 19:50:05,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4538 conditions, 1688 events. 761/1688 cut-off events. For 1863/1877 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 11088 event pairs, 337 based on Foata normal form. 15/1575 useless extension candidates. Maximal degree in co-relation 4325. Up to 758 conditions per place. [2024-10-11 19:50:05,764 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 148 selfloop transitions, 20 changer transitions 0/185 dead transitions. [2024-10-11 19:50:05,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 185 transitions, 1823 flow [2024-10-11 19:50:05,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:50:05,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:50:05,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-10-11 19:50:05,767 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-10-11 19:50:05,767 INFO L175 Difference]: Start difference. First operand has 115 places, 160 transitions, 1400 flow. Second operand 5 states and 166 transitions. [2024-10-11 19:50:05,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 185 transitions, 1823 flow [2024-10-11 19:50:05,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 185 transitions, 1746 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-10-11 19:50:05,781 INFO L231 Difference]: Finished difference. Result has 116 places, 160 transitions, 1374 flow [2024-10-11 19:50:05,782 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1374, PETRI_PLACES=116, PETRI_TRANSITIONS=160} [2024-10-11 19:50:05,782 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 70 predicate places. [2024-10-11 19:50:05,783 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 160 transitions, 1374 flow [2024-10-11 19:50:05,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 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) [2024-10-11 19:50:05,783 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:05,783 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:05,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2024-10-11 19:50:05,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:50:05,984 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:50:05,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:05,985 INFO L85 PathProgramCache]: Analyzing trace with hash 893638672, now seen corresponding path program 1 times [2024-10-11 19:50:05,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:05,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159648058] [2024-10-11 19:50:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:05,985 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 [2024-10-11 19:50:05,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:05,988 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:50:05,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:50:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:06,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 19:50:06,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:06,084 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 [2024-10-11 19:50:06,093 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 [2024-10-11 19:50:06,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:50:06,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-11 19:50:06,222 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:50:06,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-11 19:50:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:50:06,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:50:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:50:06,808 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:06,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159648058] [2024-10-11 19:50:06,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159648058] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:50:06,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:50:06,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-11 19:50:06,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371395267] [2024-10-11 19:50:06,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:50:06,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 19:50:06,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:06,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 19:50:06,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:50:07,585 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-11 19:50:07,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 160 transitions, 1374 flow. Second operand has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 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) [2024-10-11 19:50:07,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:07,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-11 19:50:07,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:08,974 INFO L124 PetriNetUnfolderBase]: 1135/2289 cut-off events. [2024-10-11 19:50:08,974 INFO L125 PetriNetUnfolderBase]: For 1727/1735 co-relation queries the response was YES. [2024-10-11 19:50:08,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5947 conditions, 2289 events. 1135/2289 cut-off events. For 1727/1735 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15177 event pairs, 627 based on Foata normal form. 0/2073 useless extension candidates. Maximal degree in co-relation 5732. Up to 917 conditions per place. [2024-10-11 19:50:08,991 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 99 selfloop transitions, 102 changer transitions 0/216 dead transitions. [2024-10-11 19:50:08,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 216 transitions, 2180 flow [2024-10-11 19:50:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 19:50:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-11 19:50:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 369 transitions. [2024-10-11 19:50:08,994 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-10-11 19:50:08,995 INFO L175 Difference]: Start difference. First operand has 116 places, 160 transitions, 1374 flow. Second operand 15 states and 369 transitions. [2024-10-11 19:50:08,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 216 transitions, 2180 flow [2024-10-11 19:50:09,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 216 transitions, 2140 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:50:09,012 INFO L231 Difference]: Finished difference. Result has 130 places, 162 transitions, 1646 flow [2024-10-11 19:50:09,012 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1646, PETRI_PLACES=130, PETRI_TRANSITIONS=162} [2024-10-11 19:50:09,014 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 84 predicate places. [2024-10-11 19:50:09,014 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 162 transitions, 1646 flow [2024-10-11 19:50:09,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 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) [2024-10-11 19:50:09,014 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:09,015 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:09,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2024-10-11 19:50:09,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:50:09,215 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:50:09,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:09,216 INFO L85 PathProgramCache]: Analyzing trace with hash -309763434, now seen corresponding path program 1 times [2024-10-11 19:50:09,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:09,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741786175] [2024-10-11 19:50:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:09,216 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 [2024-10-11 19:50:09,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:09,219 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:50:09,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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 [2024-10-11 19:50:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:09,312 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 19:50:09,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:50:09,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:50:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:50:09,554 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:09,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741786175] [2024-10-11 19:50:09,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741786175] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:50:09,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:50:09,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-10-11 19:50:09,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960725396] [2024-10-11 19:50:09,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:50:09,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 19:50:09,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:09,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 19:50:09,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-10-11 19:50:09,771 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-10-11 19:50:09,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 162 transitions, 1646 flow. Second operand has 12 states, 12 states have (on average 24.833333333333332) internal successors, (298), 12 states have internal predecessors, (298), 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) [2024-10-11 19:50:09,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:09,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-10-11 19:50:09,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:10,259 INFO L124 PetriNetUnfolderBase]: 1006/2198 cut-off events. [2024-10-11 19:50:10,259 INFO L125 PetriNetUnfolderBase]: For 1891/1905 co-relation queries the response was YES. [2024-10-11 19:50:10,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6210 conditions, 2198 events. 1006/2198 cut-off events. For 1891/1905 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 15132 event pairs, 708 based on Foata normal form. 18/2032 useless extension candidates. Maximal degree in co-relation 5970. Up to 1194 conditions per place. [2024-10-11 19:50:10,271 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 145 selfloop transitions, 69 changer transitions 0/233 dead transitions. [2024-10-11 19:50:10,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 233 transitions, 2546 flow [2024-10-11 19:50:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 19:50:10,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 19:50:10,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 282 transitions. [2024-10-11 19:50:10,273 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-10-11 19:50:10,273 INFO L175 Difference]: Start difference. First operand has 130 places, 162 transitions, 1646 flow. Second operand 9 states and 282 transitions. [2024-10-11 19:50:10,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 233 transitions, 2546 flow [2024-10-11 19:50:10,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 233 transitions, 2420 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-10-11 19:50:10,290 INFO L231 Difference]: Finished difference. Result has 130 places, 177 transitions, 1997 flow [2024-10-11 19:50:10,290 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1535, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1997, PETRI_PLACES=130, PETRI_TRANSITIONS=177} [2024-10-11 19:50:10,291 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 84 predicate places. [2024-10-11 19:50:10,291 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 177 transitions, 1997 flow [2024-10-11 19:50:10,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.833333333333332) internal successors, (298), 12 states have internal predecessors, (298), 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) [2024-10-11 19:50:10,292 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:10,292 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:10,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2024-10-11 19:50:10,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:50:10,492 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:50:10,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:10,493 INFO L85 PathProgramCache]: Analyzing trace with hash -682011562, now seen corresponding path program 1 times [2024-10-11 19:50:10,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:10,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923692051] [2024-10-11 19:50:10,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:10,494 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 [2024-10-11 19:50:10,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:10,495 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:50:10,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-10-11 19:50:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:10,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 19:50:10,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:50:10,586 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:50:10,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:10,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923692051] [2024-10-11 19:50:10,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923692051] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:50:10,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:50:10,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:50:10,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863917711] [2024-10-11 19:50:10,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:50:10,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:50:10,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:10,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:50:10,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:50:10,621 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2024-10-11 19:50:10,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 177 transitions, 1997 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-10-11 19:50:10,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:10,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2024-10-11 19:50:10,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:10,840 INFO L124 PetriNetUnfolderBase]: 959/2180 cut-off events. [2024-10-11 19:50:10,840 INFO L125 PetriNetUnfolderBase]: For 2755/2860 co-relation queries the response was YES. [2024-10-11 19:50:10,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6298 conditions, 2180 events. 959/2180 cut-off events. For 2755/2860 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 15139 event pairs, 339 based on Foata normal form. 12/2084 useless extension candidates. Maximal degree in co-relation 6063. Up to 983 conditions per place. [2024-10-11 19:50:10,852 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 160 selfloop transitions, 5 changer transitions 7/192 dead transitions. [2024-10-11 19:50:10,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 192 transitions, 2405 flow [2024-10-11 19:50:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:50:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:50:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-10-11 19:50:10,854 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-10-11 19:50:10,854 INFO L175 Difference]: Start difference. First operand has 130 places, 177 transitions, 1997 flow. Second operand 3 states and 108 transitions. [2024-10-11 19:50:10,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 192 transitions, 2405 flow [2024-10-11 19:50:10,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 192 transitions, 2399 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:50:10,872 INFO L231 Difference]: Finished difference. Result has 131 places, 175 transitions, 1947 flow [2024-10-11 19:50:10,872 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1947, PETRI_PLACES=131, PETRI_TRANSITIONS=175} [2024-10-11 19:50:10,873 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 85 predicate places. [2024-10-11 19:50:10,873 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 175 transitions, 1947 flow [2024-10-11 19:50:10,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-10-11 19:50:10,874 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:10,874 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:10,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2024-10-11 19:50:11,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:50:11,074 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:50:11,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:11,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2112196417, now seen corresponding path program 1 times [2024-10-11 19:50:11,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:11,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662758799] [2024-10-11 19:50:11,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:11,076 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 [2024-10-11 19:50:11,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:11,077 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:50:11,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-10-11 19:50:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:11,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 19:50:11,159 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:11,173 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 [2024-10-11 19:50:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 19:50:11,426 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:50:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 19:50:12,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:12,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662758799] [2024-10-11 19:50:12,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662758799] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:50:12,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:50:12,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-11 19:50:12,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557079901] [2024-10-11 19:50:12,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:50:12,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:50:12,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:12,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:50:12,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:50:12,933 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-10-11 19:50:12,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 175 transitions, 1947 flow. Second operand has 14 states, 14 states have (on average 22.142857142857142) internal successors, (310), 14 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:50:12,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:12,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-10-11 19:50:12,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:14,239 INFO L124 PetriNetUnfolderBase]: 2478/4847 cut-off events. [2024-10-11 19:50:14,239 INFO L125 PetriNetUnfolderBase]: For 5370/5393 co-relation queries the response was YES. [2024-10-11 19:50:14,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13709 conditions, 4847 events. 2478/4847 cut-off events. For 5370/5393 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 33393 event pairs, 134 based on Foata normal form. 138/4956 useless extension candidates. Maximal degree in co-relation 13472. Up to 915 conditions per place. [2024-10-11 19:50:14,269 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 238 selfloop transitions, 38 changer transitions 1/290 dead transitions. [2024-10-11 19:50:14,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 290 transitions, 3026 flow [2024-10-11 19:50:14,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:50:14,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:50:14,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 368 transitions. [2024-10-11 19:50:14,272 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-10-11 19:50:14,272 INFO L175 Difference]: Start difference. First operand has 131 places, 175 transitions, 1947 flow. Second operand 12 states and 368 transitions. [2024-10-11 19:50:14,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 290 transitions, 3026 flow [2024-10-11 19:50:14,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 290 transitions, 3012 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-10-11 19:50:14,298 INFO L231 Difference]: Finished difference. Result has 138 places, 182 transitions, 2065 flow [2024-10-11 19:50:14,298 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1933, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2065, PETRI_PLACES=138, PETRI_TRANSITIONS=182} [2024-10-11 19:50:14,299 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 92 predicate places. [2024-10-11 19:50:14,299 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 182 transitions, 2065 flow [2024-10-11 19:50:14,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 22.142857142857142) internal successors, (310), 14 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:50:14,299 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:14,299 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:14,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2024-10-11 19:50:14,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:50:14,501 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:50:14,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:14,501 INFO L85 PathProgramCache]: Analyzing trace with hash 206428191, now seen corresponding path program 2 times [2024-10-11 19:50:14,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:14,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [254146469] [2024-10-11 19:50:14,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:50:14,502 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 [2024-10-11 19:50:14,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:14,505 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:50:14,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2024-10-11 19:50:14,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 19:50:14,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:50:14,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 19:50:14,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:14,603 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 [2024-10-11 19:50:14,611 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 [2024-10-11 19:50:14,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:50:14,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-11 19:50:14,759 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:50:14,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-11 19:50:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 19:50:14,870 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:50:14,870 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:14,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [254146469] [2024-10-11 19:50:14,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [254146469] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:50:14,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:50:14,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:50:14,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647813944] [2024-10-11 19:50:14,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:50:14,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:50:14,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:14,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:50:14,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:50:15,036 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-11 19:50:15,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 182 transitions, 2065 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:50:15,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:15,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-11 19:50:15,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:15,713 INFO L124 PetriNetUnfolderBase]: 2585/5341 cut-off events. [2024-10-11 19:50:15,713 INFO L125 PetriNetUnfolderBase]: For 7405/7520 co-relation queries the response was YES. [2024-10-11 19:50:15,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16048 conditions, 5341 events. 2585/5341 cut-off events. For 7405/7520 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 39111 event pairs, 489 based on Foata normal form. 56/5337 useless extension candidates. Maximal degree in co-relation 15802. Up to 2113 conditions per place. [2024-10-11 19:50:15,743 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 174 selfloop transitions, 19 changer transitions 1/213 dead transitions. [2024-10-11 19:50:15,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 213 transitions, 2575 flow [2024-10-11 19:50:15,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:50:15,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:50:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-10-11 19:50:15,744 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-10-11 19:50:15,745 INFO L175 Difference]: Start difference. First operand has 138 places, 182 transitions, 2065 flow. Second operand 5 states and 145 transitions. [2024-10-11 19:50:15,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 213 transitions, 2575 flow [2024-10-11 19:50:15,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 213 transitions, 2506 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-10-11 19:50:15,773 INFO L231 Difference]: Finished difference. Result has 140 places, 185 transitions, 2085 flow [2024-10-11 19:50:15,773 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2085, PETRI_PLACES=140, PETRI_TRANSITIONS=185} [2024-10-11 19:50:15,774 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 94 predicate places. [2024-10-11 19:50:15,774 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 185 transitions, 2085 flow [2024-10-11 19:50:15,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:50:15,774 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:15,774 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:15,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2024-10-11 19:50:15,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:50:15,975 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:50:15,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:15,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1205730928, now seen corresponding path program 2 times [2024-10-11 19:50:15,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:15,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263348307] [2024-10-11 19:50:15,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:50:15,977 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 [2024-10-11 19:50:15,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:15,979 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:50:15,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2024-10-11 19:50:16,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:50:16,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:50:16,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 19:50:16,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:16,077 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 [2024-10-11 19:50:16,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 19:50:16,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:50:16,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-11 19:50:16,188 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:50:16,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-11 19:50:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:50:16,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:50:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:50:20,922 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:20,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263348307] [2024-10-11 19:50:20,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263348307] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:50:20,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:50:20,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-11 19:50:20,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206993414] [2024-10-11 19:50:20,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:50:20,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 19:50:20,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:20,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 19:50:20,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=99, Unknown=1, NotChecked=0, Total=132 [2024-10-11 19:50:25,761 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] [2024-10-11 19:50:26,397 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-10-11 19:50:26,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 185 transitions, 2085 flow. Second operand has 12 states, 12 states have (on average 19.166666666666668) internal successors, (230), 12 states have internal predecessors, (230), 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) [2024-10-11 19:50:26,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:26,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-10-11 19:50:26,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:27,868 INFO L124 PetriNetUnfolderBase]: 2769/5979 cut-off events. [2024-10-11 19:50:27,868 INFO L125 PetriNetUnfolderBase]: For 7788/7876 co-relation queries the response was YES. [2024-10-11 19:50:27,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17516 conditions, 5979 events. 2769/5979 cut-off events. For 7788/7876 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 47200 event pairs, 1366 based on Foata normal form. 62/5685 useless extension candidates. Maximal degree in co-relation 17276. Up to 1634 conditions per place. [2024-10-11 19:50:27,907 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 172 selfloop transitions, 49 changer transitions 0/244 dead transitions. [2024-10-11 19:50:27,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 244 transitions, 2854 flow [2024-10-11 19:50:27,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 19:50:27,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 19:50:27,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 276 transitions. [2024-10-11 19:50:27,910 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-10-11 19:50:27,910 INFO L175 Difference]: Start difference. First operand has 140 places, 185 transitions, 2085 flow. Second operand 11 states and 276 transitions. [2024-10-11 19:50:27,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 244 transitions, 2854 flow [2024-10-11 19:50:27,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 244 transitions, 2809 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-11 19:50:27,942 INFO L231 Difference]: Finished difference. Result has 149 places, 195 transitions, 2260 flow [2024-10-11 19:50:27,942 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2047, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2260, PETRI_PLACES=149, PETRI_TRANSITIONS=195} [2024-10-11 19:50:27,943 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 103 predicate places. [2024-10-11 19:50:27,943 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 195 transitions, 2260 flow [2024-10-11 19:50:27,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.166666666666668) internal successors, (230), 12 states have internal predecessors, (230), 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) [2024-10-11 19:50:27,943 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:27,943 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:27,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2024-10-11 19:50:28,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:50:28,144 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:50:28,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:28,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1277046514, now seen corresponding path program 1 times [2024-10-11 19:50:28,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:28,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090439742] [2024-10-11 19:50:28,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:28,145 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 [2024-10-11 19:50:28,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:28,148 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:50:28,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2024-10-11 19:50:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:28,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 19:50:28,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:28,332 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 [2024-10-11 19:50:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 19:50:28,504 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:50:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 19:50:29,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:29,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090439742] [2024-10-11 19:50:29,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090439742] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:50:29,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:50:29,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-11 19:50:29,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764044578] [2024-10-11 19:50:29,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:50:29,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:50:29,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:29,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:50:29,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:50:30,140 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-10-11 19:50:30,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 195 transitions, 2260 flow. Second operand has 14 states, 14 states have (on average 21.857142857142858) internal successors, (306), 14 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:50:30,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:30,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-10-11 19:50:30,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:32,067 INFO L124 PetriNetUnfolderBase]: 4602/9190 cut-off events. [2024-10-11 19:50:32,067 INFO L125 PetriNetUnfolderBase]: For 14339/14516 co-relation queries the response was YES. [2024-10-11 19:50:32,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28084 conditions, 9190 events. 4602/9190 cut-off events. For 14339/14516 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 70749 event pairs, 380 based on Foata normal form. 205/9268 useless extension candidates. Maximal degree in co-relation 27844. Up to 2453 conditions per place. [2024-10-11 19:50:32,125 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 264 selfloop transitions, 45 changer transitions 1/332 dead transitions. [2024-10-11 19:50:32,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 332 transitions, 3491 flow [2024-10-11 19:50:32,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:50:32,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:50:32,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 382 transitions. [2024-10-11 19:50:32,128 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6631944444444444 [2024-10-11 19:50:32,128 INFO L175 Difference]: Start difference. First operand has 149 places, 195 transitions, 2260 flow. Second operand 12 states and 382 transitions. [2024-10-11 19:50:32,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 332 transitions, 3491 flow [2024-10-11 19:50:32,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 332 transitions, 3403 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-10-11 19:50:32,170 INFO L231 Difference]: Finished difference. Result has 157 places, 203 transitions, 2365 flow [2024-10-11 19:50:32,171 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2365, PETRI_PLACES=157, PETRI_TRANSITIONS=203} [2024-10-11 19:50:32,171 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 111 predicate places. [2024-10-11 19:50:32,171 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 203 transitions, 2365 flow [2024-10-11 19:50:32,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.857142857142858) internal successors, (306), 14 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:50:32,171 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:32,171 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:32,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2024-10-11 19:50:32,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:50:32,372 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:50:32,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:32,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1053579093, now seen corresponding path program 1 times [2024-10-11 19:50:32,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:32,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631252675] [2024-10-11 19:50:32,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:50:32,373 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 [2024-10-11 19:50:32,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:32,374 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:50:32,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2024-10-11 19:50:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:50:32,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 19:50:32,468 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:50:32,590 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:50:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:50:32,712 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:32,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631252675] [2024-10-11 19:50:32,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631252675] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:50:32,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:50:32,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-10-11 19:50:32,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017308930] [2024-10-11 19:50:32,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:50:32,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 19:50:32,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:32,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 19:50:32,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2024-10-11 19:50:32,938 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-10-11 19:50:32,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 203 transitions, 2365 flow. Second operand has 12 states, 12 states have (on average 25.166666666666668) internal successors, (302), 12 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) [2024-10-11 19:50:32,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:32,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-10-11 19:50:32,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:33,935 INFO L124 PetriNetUnfolderBase]: 3138/6684 cut-off events. [2024-10-11 19:50:33,935 INFO L125 PetriNetUnfolderBase]: For 14205/14457 co-relation queries the response was YES. [2024-10-11 19:50:33,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20614 conditions, 6684 events. 3138/6684 cut-off events. For 14205/14457 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 52107 event pairs, 2665 based on Foata normal form. 25/6331 useless extension candidates. Maximal degree in co-relation 20323. Up to 4877 conditions per place. [2024-10-11 19:50:33,979 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 129 selfloop transitions, 70 changer transitions 17/247 dead transitions. [2024-10-11 19:50:33,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 247 transitions, 3021 flow [2024-10-11 19:50:33,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 19:50:33,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 19:50:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 279 transitions. [2024-10-11 19:50:33,981 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-10-11 19:50:33,981 INFO L175 Difference]: Start difference. First operand has 157 places, 203 transitions, 2365 flow. Second operand 9 states and 279 transitions. [2024-10-11 19:50:33,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 247 transitions, 3021 flow [2024-10-11 19:50:34,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 247 transitions, 2958 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-10-11 19:50:34,019 INFO L231 Difference]: Finished difference. Result has 163 places, 203 transitions, 2453 flow [2024-10-11 19:50:34,020 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2309, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2453, PETRI_PLACES=163, PETRI_TRANSITIONS=203} [2024-10-11 19:50:34,020 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 117 predicate places. [2024-10-11 19:50:34,021 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 203 transitions, 2453 flow [2024-10-11 19:50:34,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 25.166666666666668) internal successors, (302), 12 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) [2024-10-11 19:50:34,021 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:34,021 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:34,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2024-10-11 19:50:34,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:50:34,222 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:50:34,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:34,222 INFO L85 PathProgramCache]: Analyzing trace with hash -895297982, now seen corresponding path program 2 times [2024-10-11 19:50:34,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:34,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514405282] [2024-10-11 19:50:34,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:50:34,223 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 [2024-10-11 19:50:34,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:34,224 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:50:34,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2024-10-11 19:50:34,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 19:50:34,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:50:34,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-11 19:50:34,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:34,294 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 [2024-10-11 19:50:34,302 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 [2024-10-11 19:50:34,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:50:34,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-11 19:50:34,464 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:50:34,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-11 19:50:34,605 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 19:50:34,605 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:50:34,605 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:34,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514405282] [2024-10-11 19:50:34,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514405282] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:50:34,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:50:34,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:50:34,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426658380] [2024-10-11 19:50:34,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:50:34,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:50:34,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:34,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:50:34,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:50:34,738 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-11 19:50:34,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 203 transitions, 2453 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:50:34,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:34,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-11 19:50:34,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:36,089 INFO L124 PetriNetUnfolderBase]: 4262/8293 cut-off events. [2024-10-11 19:50:36,089 INFO L125 PetriNetUnfolderBase]: For 19738/19900 co-relation queries the response was YES. [2024-10-11 19:50:36,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26985 conditions, 8293 events. 4262/8293 cut-off events. For 19738/19900 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 60853 event pairs, 233 based on Foata normal form. 67/8258 useless extension candidates. Maximal degree in co-relation 26681. Up to 5086 conditions per place. [2024-10-11 19:50:36,155 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 191 selfloop transitions, 20 changer transitions 1/234 dead transitions. [2024-10-11 19:50:36,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 234 transitions, 3035 flow [2024-10-11 19:50:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:50:36,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:50:36,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-10-11 19:50:36,157 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-10-11 19:50:36,157 INFO L175 Difference]: Start difference. First operand has 163 places, 203 transitions, 2453 flow. Second operand 5 states and 143 transitions. [2024-10-11 19:50:36,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 234 transitions, 3035 flow [2024-10-11 19:50:36,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 234 transitions, 2898 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-11 19:50:36,214 INFO L231 Difference]: Finished difference. Result has 163 places, 207 transitions, 2418 flow [2024-10-11 19:50:36,214 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2418, PETRI_PLACES=163, PETRI_TRANSITIONS=207} [2024-10-11 19:50:36,215 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 117 predicate places. [2024-10-11 19:50:36,215 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 207 transitions, 2418 flow [2024-10-11 19:50:36,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:50:36,215 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:36,215 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:36,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2024-10-11 19:50:36,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:50:36,416 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:50:36,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:36,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1657256303, now seen corresponding path program 2 times [2024-10-11 19:50:36,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:36,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098035371] [2024-10-11 19:50:36,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:50:36,417 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 [2024-10-11 19:50:36,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:36,419 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:50:36,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2024-10-11 19:50:36,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:50:36,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:50:36,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 19:50:36,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:36,509 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 [2024-10-11 19:50:36,516 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 [2024-10-11 19:50:36,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:50:36,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-11 19:50:36,593 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:50:36,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-11 19:50:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 19:50:36,739 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:50:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 19:50:37,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:37,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098035371] [2024-10-11 19:50:37,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098035371] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:50:37,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:50:37,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-11 19:50:37,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937281780] [2024-10-11 19:50:37,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:50:37,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 19:50:37,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:37,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 19:50:37,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:50:38,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-10-11 19:50:38,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 207 transitions, 2418 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) [2024-10-11 19:50:38,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:50:38,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-10-11 19:50:38,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:50:39,652 INFO L124 PetriNetUnfolderBase]: 4074/8034 cut-off events. [2024-10-11 19:50:39,652 INFO L125 PetriNetUnfolderBase]: For 21890/22060 co-relation queries the response was YES. [2024-10-11 19:50:39,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26750 conditions, 8034 events. 4074/8034 cut-off events. For 21890/22060 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 58892 event pairs, 233 based on Foata normal form. 213/8149 useless extension candidates. Maximal degree in co-relation 26455. Up to 1950 conditions per place. [2024-10-11 19:50:39,710 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 282 selfloop transitions, 27 changer transitions 1/332 dead transitions. [2024-10-11 19:50:39,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 332 transitions, 3867 flow [2024-10-11 19:50:39,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 19:50:39,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 19:50:39,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 326 transitions. [2024-10-11 19:50:39,712 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6174242424242424 [2024-10-11 19:50:39,712 INFO L175 Difference]: Start difference. First operand has 163 places, 207 transitions, 2418 flow. Second operand 11 states and 326 transitions. [2024-10-11 19:50:39,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 332 transitions, 3867 flow [2024-10-11 19:50:39,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 332 transitions, 3840 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-10-11 19:50:39,755 INFO L231 Difference]: Finished difference. Result has 174 places, 208 transitions, 2471 flow [2024-10-11 19:50:39,755 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2391, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2471, PETRI_PLACES=174, PETRI_TRANSITIONS=208} [2024-10-11 19:50:39,756 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 128 predicate places. [2024-10-11 19:50:39,756 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 208 transitions, 2471 flow [2024-10-11 19:50:39,756 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) [2024-10-11 19:50:39,756 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:50:39,756 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:50:39,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2024-10-11 19:50:39,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:50:39,957 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-11 19:50:39,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:50:39,958 INFO L85 PathProgramCache]: Analyzing trace with hash 327991413, now seen corresponding path program 3 times [2024-10-11 19:50:39,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:50:39,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916531258] [2024-10-11 19:50:39,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 19:50:39,958 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 [2024-10-11 19:50:39,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:50:39,959 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -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) [2024-10-11 19:50:39,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2024-10-11 19:50:40,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 19:50:40,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:50:40,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-11 19:50:40,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:50:40,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 19:50:40,102 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 [2024-10-11 19:50:40,187 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-11 19:50:40,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-10-11 19:50:40,206 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:50:40,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-11 19:50:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 19:50:40,784 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:50:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 19:50:43,056 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:50:43,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916531258] [2024-10-11 19:50:43,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916531258] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:50:43,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:50:43,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2024-10-11 19:50:43,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191881646] [2024-10-11 19:50:43,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:50:43,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 19:50:43,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:50:43,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 19:50:43,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-10-11 19:50:47,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-11 19:50:59,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-11 19:51:00,543 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 48 [2024-10-11 19:51:00,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 208 transitions, 2471 flow. Second operand has 20 states, 20 states have (on average 16.7) internal successors, (334), 20 states have internal predecessors, (334), 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) [2024-10-11 19:51:00,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:51:00,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 48 [2024-10-11 19:51:00,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand