./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:53:18,689 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:53:18,739 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:53:18,745 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:53:18,745 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:53:18,760 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:53:18,760 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:53:18,761 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:53:18,761 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:53:18,761 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:53:18,762 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:53:18,762 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:53:18,762 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:53:18,763 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:53:18,763 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:53:18,764 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:53:18,764 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:53:18,765 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:53:18,766 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:53:18,767 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:53:18,767 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:53:18,767 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:53:18,767 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:53:18,768 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:53:18,768 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:53:18,770 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:53:18,771 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:53:18,771 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:53:18,771 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:53:18,771 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:53:18,772 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:53:18,772 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:53:18,772 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:53:18,772 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:53:18,772 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:53:18,772 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:53:18,772 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:53:18,773 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:53:18,773 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:53:18,773 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:53:18,773 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:53:18,773 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:53:18,774 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 [2024-10-14 19:53:18,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:53:19,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:53:19,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:53:19,019 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:53:19,019 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:53:19,020 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-10-14 19:53:20,193 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:53:20,351 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:53:20,351 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-10-14 19:53:20,359 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd773acdb/91a1f1dd08bf4896a59363f86e66e6c6/FLAG881fd50b0 [2024-10-14 19:53:20,755 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd773acdb/91a1f1dd08bf4896a59363f86e66e6c6 [2024-10-14 19:53:20,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:53:20,758 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:53:20,759 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:53:20,759 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:53:20,767 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:53:20,767 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:53:20" (1/1) ... [2024-10-14 19:53:20,769 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a45f1ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:20, skipping insertion in model container [2024-10-14 19:53:20,769 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:53:20" (1/1) ... [2024-10-14 19:53:20,788 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:53:20,933 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:53:20,946 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-10-14 19:53:20,946 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5d0f3c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:20, skipping insertion in model container [2024-10-14 19:53:20,946 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:53:20,947 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-14 19:53:20,948 INFO L158 Benchmark]: Toolchain (without parser) took 189.22ms. Allocated memory is still 201.3MB. Free memory was 173.6MB in the beginning and 162.1MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-14 19:53:20,948 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 142.6MB. Free memory was 99.8MB in the beginning and 99.7MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 19:53:20,949 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.62ms. Allocated memory is still 201.3MB. Free memory was 173.6MB in the beginning and 163.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-14 19:53:20,950 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 142.6MB. Free memory was 99.8MB in the beginning and 99.7MB in the end (delta: 139.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 187.62ms. Allocated memory is still 201.3MB. Free memory was 173.6MB in the beginning and 163.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 100]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:53:22,509 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:53:22,552 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-14 19:53:22,556 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:53:22,557 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:53:22,587 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:53:22,590 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:53:22,590 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:53:22,590 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:53:22,591 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:53:22,591 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:53:22,591 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:53:22,591 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:53:22,592 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:53:22,592 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:53:22,592 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:53:22,592 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:53:22,593 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:53:22,593 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:53:22,593 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:53:22,593 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:53:22,596 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:53:22,596 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:53:22,596 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:53:22,596 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:53:22,596 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-14 19:53:22,596 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:53:22,597 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-14 19:53:22,597 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:53:22,597 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:53:22,597 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:53:22,597 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:53:22,597 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:53:22,598 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:53:22,598 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:53:22,598 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:53:22,598 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:53:22,598 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:53:22,598 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-14 19:53:22,599 INFO L153 SettingsManager]: * Command for external solver=cvc5 --incremental --print-success --lang smt [2024-10-14 19:53:22,599 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:53:22,602 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:53:22,602 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:53:22,603 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:53:22,603 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-14 19:53:22,603 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 [2024-10-14 19:53:22,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:53:22,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:53:22,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:53:22,854 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:53:22,855 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:53:22,857 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-10-14 19:53:24,158 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:53:24,323 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:53:24,324 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-10-14 19:53:24,334 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3cd9e7ba/f1440c323f28453d81892e34690e2d1e/FLAG5bbb25e46 [2024-10-14 19:53:24,718 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3cd9e7ba/f1440c323f28453d81892e34690e2d1e [2024-10-14 19:53:24,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:53:24,721 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:53:24,722 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:53:24,722 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:53:24,726 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:53:24,726 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:53:24" (1/1) ... [2024-10-14 19:53:24,727 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d166900 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:24, skipping insertion in model container [2024-10-14 19:53:24,727 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:53:24" (1/1) ... [2024-10-14 19:53:24,756 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:53:24,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:53:24,926 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-14 19:53:24,929 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:53:24,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:53:24,953 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:53:24,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:53:24,986 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:53:24,986 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:24 WrapperNode [2024-10-14 19:53:24,986 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:53:24,987 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:53:24,987 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:53:24,987 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:53:24,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:24" (1/1) ... [2024-10-14 19:53:24,999 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:24" (1/1) ... [2024-10-14 19:53:25,025 INFO L138 Inliner]: procedures = 27, calls = 31, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 258 [2024-10-14 19:53:25,025 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:53:25,026 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:53:25,026 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:53:25,026 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:53:25,035 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:24" (1/1) ... [2024-10-14 19:53:25,035 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:24" (1/1) ... [2024-10-14 19:53:25,039 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:24" (1/1) ... [2024-10-14 19:53:25,053 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-10-14 19:53:25,054 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:24" (1/1) ... [2024-10-14 19:53:25,054 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:24" (1/1) ... [2024-10-14 19:53:25,064 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:24" (1/1) ... [2024-10-14 19:53:25,069 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:24" (1/1) ... [2024-10-14 19:53:25,076 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:24" (1/1) ... [2024-10-14 19:53:25,077 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:24" (1/1) ... [2024-10-14 19:53:25,082 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:53:25,082 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:53:25,082 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:53:25,083 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:53:25,083 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:24" (1/1) ... [2024-10-14 19:53:25,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:53:25,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:53:25,118 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 19:53:25,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 19:53:25,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:53:25,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-14 19:53:25,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-14 19:53:25,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-14 19:53:25,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-14 19:53:25,152 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 19:53:25,152 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 19:53:25,152 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 19:53:25,152 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 19:53:25,152 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-14 19:53:25,152 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-14 19:53:25,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 19:53:25,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:53:25,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:53:25,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-14 19:53:25,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-14 19:53:25,154 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 19:53:25,269 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:53:25,270 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:53:25,799 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:53:25,800 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:53:26,091 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:53:26,091 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-14 19:53:26,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:53:26 BoogieIcfgContainer [2024-10-14 19:53:26,092 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:53:26,093 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:53:26,094 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:53:26,096 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:53:26,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:53:24" (1/3) ... [2024-10-14 19:53:26,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12777879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:53:26, skipping insertion in model container [2024-10-14 19:53:26,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:24" (2/3) ... [2024-10-14 19:53:26,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12777879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:53:26, skipping insertion in model container [2024-10-14 19:53:26,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:53:26" (3/3) ... [2024-10-14 19:53:26,099 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2024-10-14 19:53:26,112 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:53:26,112 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-10-14 19:53:26,113 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:53:26,168 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-14 19:53:26,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 60 transitions, 141 flow [2024-10-14 19:53:26,224 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2024-10-14 19:53:26,233 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-14 19:53:26,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 6/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 114 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-10-14 19:53:26,237 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 60 transitions, 141 flow [2024-10-14 19:53:26,240 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 130 flow [2024-10-14 19:53:26,249 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:53:26,254 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;@1707c20a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:53:26,254 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-10-14 19:53:26,257 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:53:26,257 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-14 19:53:26,257 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:53:26,257 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:26,257 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:53:26,258 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-14 19:53:26,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:26,261 INFO L85 PathProgramCache]: Analyzing trace with hash 879783, now seen corresponding path program 1 times [2024-10-14 19:53:26,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:26,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403238033] [2024-10-14 19:53:26,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:26,271 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:26,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:26,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:53:26,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-14 19:53:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:26,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:53:26,342 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:26,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:53:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:26,398 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:26,398 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:26,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403238033] [2024-10-14 19:53:26,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403238033] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:26,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:26,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:53:26,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144273274] [2024-10-14 19:53:26,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:26,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:53:26,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:26,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:53:26,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:53:26,479 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-14 19:53:26,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:26,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:26,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-14 19:53:26,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:26,713 INFO L124 PetriNetUnfolderBase]: 306/660 cut-off events. [2024-10-14 19:53:26,713 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-10-14 19:53:26,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1161 conditions, 660 events. 306/660 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3405 event pairs, 202 based on Foata normal form. 1/551 useless extension candidates. Maximal degree in co-relation 987. Up to 441 conditions per place. [2024-10-14 19:53:26,720 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 29 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-10-14 19:53:26,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 182 flow [2024-10-14 19:53:26,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:53:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:53:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-10-14 19:53:26,731 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-10-14 19:53:26,732 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 130 flow. Second operand 3 states and 107 transitions. [2024-10-14 19:53:26,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 182 flow [2024-10-14 19:53:26,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 170 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-14 19:53:26,737 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 112 flow [2024-10-14 19:53:26,739 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-10-14 19:53:26,741 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-10-14 19:53:26,742 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 112 flow [2024-10-14 19:53:26,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:26,742 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:26,742 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:53:26,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-10-14 19:53:26,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:26,944 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-14 19:53:26,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:26,944 INFO L85 PathProgramCache]: Analyzing trace with hash 879784, now seen corresponding path program 1 times [2024-10-14 19:53:26,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:26,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377012765] [2024-10-14 19:53:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:26,945 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:26,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:26,948 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:53:26,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-14 19:53:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:26,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:53:26,992 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:27,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:53:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:27,072 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:27,072 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:27,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377012765] [2024-10-14 19:53:27,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377012765] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:27,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:27,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:53:27,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798325501] [2024-10-14 19:53:27,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:27,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:53:27,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:27,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:53:27,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:53:27,162 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-14 19:53:27,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 112 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) [2024-10-14 19:53:27,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:27,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-14 19:53:27,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:27,450 INFO L124 PetriNetUnfolderBase]: 309/669 cut-off events. [2024-10-14 19:53:27,450 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-10-14 19:53:27,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1149 conditions, 669 events. 309/669 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3445 event pairs, 202 based on Foata normal form. 0/555 useless extension candidates. Maximal degree in co-relation 1099. Up to 454 conditions per place. [2024-10-14 19:53:27,456 INFO L140 encePairwiseOnDemand]: 47/60 looper letters, 33 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2024-10-14 19:53:27,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 218 flow [2024-10-14 19:53:27,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:53:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:53:27,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 142 transitions. [2024-10-14 19:53:27,460 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-10-14 19:53:27,460 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 112 flow. Second operand 4 states and 142 transitions. [2024-10-14 19:53:27,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 218 flow [2024-10-14 19:53:27,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 60 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:53:27,464 INFO L231 Difference]: Finished difference. Result has 55 places, 60 transitions, 190 flow [2024-10-14 19:53:27,465 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=55, PETRI_TRANSITIONS=60} [2024-10-14 19:53:27,465 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -5 predicate places. [2024-10-14 19:53:27,465 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 60 transitions, 190 flow [2024-10-14 19:53:27,467 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) [2024-10-14 19:53:27,467 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:27,467 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-14 19:53:27,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-10-14 19:53:27,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:27,668 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-14 19:53:27,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:27,669 INFO L85 PathProgramCache]: Analyzing trace with hash 845501723, now seen corresponding path program 1 times [2024-10-14 19:53:27,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:27,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537607861] [2024-10-14 19:53:27,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:27,670 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:27,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:27,672 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:53:27,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-14 19:53:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:27,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 19:53:27,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:27,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:53:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:27,853 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:53:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:28,077 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:28,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537607861] [2024-10-14 19:53:28,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537607861] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:53:28,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:53:28,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:53:28,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978469724] [2024-10-14 19:53:28,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:53:28,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:53:28,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:28,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:53:28,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:53:28,502 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-14 19:53:28,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 60 transitions, 190 flow. Second operand has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:28,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:28,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-14 19:53:28,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:29,583 INFO L124 PetriNetUnfolderBase]: 318/696 cut-off events. [2024-10-14 19:53:29,583 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-10-14 19:53:29,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1267 conditions, 696 events. 318/696 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3626 event pairs, 202 based on Foata normal form. 0/582 useless extension candidates. Maximal degree in co-relation 1113. Up to 457 conditions per place. [2024-10-14 19:53:29,589 INFO L140 encePairwiseOnDemand]: 47/60 looper letters, 33 selfloop transitions, 37 changer transitions 0/87 dead transitions. [2024-10-14 19:53:29,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 87 transitions, 450 flow [2024-10-14 19:53:29,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 19:53:29,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 19:53:29,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 319 transitions. [2024-10-14 19:53:29,592 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5316666666666666 [2024-10-14 19:53:29,592 INFO L175 Difference]: Start difference. First operand has 55 places, 60 transitions, 190 flow. Second operand 10 states and 319 transitions. [2024-10-14 19:53:29,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 87 transitions, 450 flow [2024-10-14 19:53:29,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 87 transitions, 450 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:53:29,598 INFO L231 Difference]: Finished difference. Result has 67 places, 87 transitions, 434 flow [2024-10-14 19:53:29,598 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=434, PETRI_PLACES=67, PETRI_TRANSITIONS=87} [2024-10-14 19:53:29,599 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 7 predicate places. [2024-10-14 19:53:29,599 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 87 transitions, 434 flow [2024-10-14 19:53:29,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:29,600 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:29,600 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:29,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2024-10-14 19:53:29,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:29,805 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-14 19:53:29,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:29,805 INFO L85 PathProgramCache]: Analyzing trace with hash -418242979, now seen corresponding path program 1 times [2024-10-14 19:53:29,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:29,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228134] [2024-10-14 19:53:29,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:29,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:29,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:29,811 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:53:29,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-14 19:53:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:29,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:53:29,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:29,919 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:29,919 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:29,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228134] [2024-10-14 19:53:29,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228134] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:29,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:29,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:53:29,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023450581] [2024-10-14 19:53:29,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:29,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:53:29,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:29,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:53:29,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:53:29,952 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-14 19:53:29,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 87 transitions, 434 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:29,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:29,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-14 19:53:29,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:30,282 INFO L124 PetriNetUnfolderBase]: 671/1444 cut-off events. [2024-10-14 19:53:30,282 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2024-10-14 19:53:30,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2629 conditions, 1444 events. 671/1444 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8505 event pairs, 388 based on Foata normal form. 2/1193 useless extension candidates. Maximal degree in co-relation 2540. Up to 598 conditions per place. [2024-10-14 19:53:30,290 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 85 selfloop transitions, 18 changer transitions 0/122 dead transitions. [2024-10-14 19:53:30,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 122 transitions, 726 flow [2024-10-14 19:53:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 19:53:30,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 19:53:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 235 transitions. [2024-10-14 19:53:30,294 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2024-10-14 19:53:30,295 INFO L175 Difference]: Start difference. First operand has 67 places, 87 transitions, 434 flow. Second operand 6 states and 235 transitions. [2024-10-14 19:53:30,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 122 transitions, 726 flow [2024-10-14 19:53:30,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 122 transitions, 628 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-10-14 19:53:30,300 INFO L231 Difference]: Finished difference. Result has 72 places, 91 transitions, 424 flow [2024-10-14 19:53:30,300 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=424, PETRI_PLACES=72, PETRI_TRANSITIONS=91} [2024-10-14 19:53:30,301 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 12 predicate places. [2024-10-14 19:53:30,301 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 91 transitions, 424 flow [2024-10-14 19:53:30,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:30,302 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:30,302 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:30,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2024-10-14 19:53:30,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:30,503 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-14 19:53:30,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:30,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1793547938, now seen corresponding path program 1 times [2024-10-14 19:53:30,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:30,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587511751] [2024-10-14 19:53:30,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:30,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:30,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:30,506 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:53:30,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-14 19:53:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:30,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:53:30,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:30,630 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:30,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:30,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587511751] [2024-10-14 19:53:30,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587511751] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:30,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:30,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:53:30,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991417088] [2024-10-14 19:53:30,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:30,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:53:30,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:30,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:53:30,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:53:30,658 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-14 19:53:30,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 91 transitions, 424 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:30,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:30,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-14 19:53:30,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:30,977 INFO L124 PetriNetUnfolderBase]: 638/1399 cut-off events. [2024-10-14 19:53:30,977 INFO L125 PetriNetUnfolderBase]: For 384/432 co-relation queries the response was YES. [2024-10-14 19:53:30,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2788 conditions, 1399 events. 638/1399 cut-off events. For 384/432 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8328 event pairs, 389 based on Foata normal form. 0/1145 useless extension candidates. Maximal degree in co-relation 2706. Up to 609 conditions per place. [2024-10-14 19:53:30,984 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 82 selfloop transitions, 18 changer transitions 0/119 dead transitions. [2024-10-14 19:53:30,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 119 transitions, 696 flow [2024-10-14 19:53:30,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 19:53:30,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 19:53:30,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2024-10-14 19:53:30,986 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-10-14 19:53:30,986 INFO L175 Difference]: Start difference. First operand has 72 places, 91 transitions, 424 flow. Second operand 6 states and 230 transitions. [2024-10-14 19:53:30,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 119 transitions, 696 flow [2024-10-14 19:53:30,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 119 transitions, 692 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-10-14 19:53:30,993 INFO L231 Difference]: Finished difference. Result has 79 places, 93 transitions, 472 flow [2024-10-14 19:53:30,993 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=472, PETRI_PLACES=79, PETRI_TRANSITIONS=93} [2024-10-14 19:53:30,994 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 19 predicate places. [2024-10-14 19:53:30,994 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 93 transitions, 472 flow [2024-10-14 19:53:30,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:30,995 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:30,995 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-14 19:53:30,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2024-10-14 19:53:31,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:31,198 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-14 19:53:31,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:31,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1729358324, now seen corresponding path program 2 times [2024-10-14 19:53:31,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:31,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182550243] [2024-10-14 19:53:31,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:53:31,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:31,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:31,200 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:53:31,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-14 19:53:31,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:53:31,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:53:31,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 19:53:31,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:31,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:53:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:31,428 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:53:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:31,815 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:31,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182550243] [2024-10-14 19:53:31,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182550243] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:53:31,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:53:31,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:53:31,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070245379] [2024-10-14 19:53:31,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:53:31,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:53:31,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:31,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:53:31,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:53:32,783 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-14 19:53:32,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 93 transitions, 472 flow. Second operand has 14 states, 14 states have (on average 25.571428571428573) internal successors, (358), 14 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:32,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:32,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-14 19:53:32,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:37,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:53:43,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:53:47,518 INFO L124 PetriNetUnfolderBase]: 559/1274 cut-off events. [2024-10-14 19:53:47,518 INFO L125 PetriNetUnfolderBase]: For 781/807 co-relation queries the response was YES. [2024-10-14 19:53:47,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2971 conditions, 1274 events. 559/1274 cut-off events. For 781/807 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7725 event pairs, 404 based on Foata normal form. 18/1110 useless extension candidates. Maximal degree in co-relation 2665. Up to 824 conditions per place. [2024-10-14 19:53:47,524 INFO L140 encePairwiseOnDemand]: 47/60 looper letters, 38 selfloop transitions, 92 changer transitions 0/147 dead transitions. [2024-10-14 19:53:47,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 147 transitions, 1056 flow [2024-10-14 19:53:47,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 19:53:47,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-14 19:53:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 670 transitions. [2024-10-14 19:53:47,527 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-10-14 19:53:47,527 INFO L175 Difference]: Start difference. First operand has 79 places, 93 transitions, 472 flow. Second operand 22 states and 670 transitions. [2024-10-14 19:53:47,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 147 transitions, 1056 flow [2024-10-14 19:53:47,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 147 transitions, 1002 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:53:47,532 INFO L231 Difference]: Finished difference. Result has 103 places, 147 transitions, 1012 flow [2024-10-14 19:53:47,532 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1012, PETRI_PLACES=103, PETRI_TRANSITIONS=147} [2024-10-14 19:53:47,532 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 43 predicate places. [2024-10-14 19:53:47,532 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 147 transitions, 1012 flow [2024-10-14 19:53:47,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 25.571428571428573) internal successors, (358), 14 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:47,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:47,533 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:47,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-14 19:53:47,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:47,734 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-14 19:53:47,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:47,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1300912348, now seen corresponding path program 1 times [2024-10-14 19:53:47,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:47,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1174422367] [2024-10-14 19:53:47,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:47,734 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:47,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:47,735 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:53:47,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-14 19:53:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:47,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:53:47,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:47,840 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:47,840 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:47,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1174422367] [2024-10-14 19:53:47,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1174422367] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:47,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:47,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:53:47,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682480868] [2024-10-14 19:53:47,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:47,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:53:47,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:47,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:53:47,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:53:47,893 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-14 19:53:47,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 147 transitions, 1012 flow. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:47,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:47,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-14 19:53:47,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:48,147 INFO L124 PetriNetUnfolderBase]: 511/1025 cut-off events. [2024-10-14 19:53:48,147 INFO L125 PetriNetUnfolderBase]: For 654/735 co-relation queries the response was YES. [2024-10-14 19:53:48,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2647 conditions, 1025 events. 511/1025 cut-off events. For 654/735 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4945 event pairs, 326 based on Foata normal form. 0/898 useless extension candidates. Maximal degree in co-relation 2520. Up to 587 conditions per place. [2024-10-14 19:53:48,153 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 117 selfloop transitions, 30 changer transitions 0/166 dead transitions. [2024-10-14 19:53:48,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 166 transitions, 1368 flow [2024-10-14 19:53:48,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 19:53:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 19:53:48,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 223 transitions. [2024-10-14 19:53:48,155 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6194444444444445 [2024-10-14 19:53:48,155 INFO L175 Difference]: Start difference. First operand has 103 places, 147 transitions, 1012 flow. Second operand 6 states and 223 transitions. [2024-10-14 19:53:48,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 166 transitions, 1368 flow [2024-10-14 19:53:48,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 166 transitions, 1134 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-10-14 19:53:48,160 INFO L231 Difference]: Finished difference. Result has 101 places, 149 transitions, 854 flow [2024-10-14 19:53:48,160 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=854, PETRI_PLACES=101, PETRI_TRANSITIONS=149} [2024-10-14 19:53:48,161 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 41 predicate places. [2024-10-14 19:53:48,161 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 149 transitions, 854 flow [2024-10-14 19:53:48,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:48,161 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:48,161 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:48,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2024-10-14 19:53:48,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:48,362 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-14 19:53:48,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:48,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1391128587, now seen corresponding path program 1 times [2024-10-14 19:53:48,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:48,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007426394] [2024-10-14 19:53:48,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:48,363 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:48,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:48,365 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:53:48,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-14 19:53:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:48,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-14 19:53:48,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:48,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:53:48,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:53:48,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:53:48,604 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 [2024-10-14 19:53:48,617 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:53:48,617 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 [2024-10-14 19:53:48,681 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-10-14 19:53:48,681 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 16 treesize of output 18 [2024-10-14 19:53:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:53:48,840 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:53:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:53:49,270 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:49,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007426394] [2024-10-14 19:53:49,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007426394] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:53:49,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:53:49,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:53:49,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498856088] [2024-10-14 19:53:49,270 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:53:49,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:53:49,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:49,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:53:49,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:53:53,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 19:53:55,078 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-10-14 19:53:55,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 149 transitions, 854 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) [2024-10-14 19:53:55,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:55,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-10-14 19:53:55,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:54:00,211 INFO L124 PetriNetUnfolderBase]: 1566/3211 cut-off events. [2024-10-14 19:54:00,211 INFO L125 PetriNetUnfolderBase]: For 1453/1736 co-relation queries the response was YES. [2024-10-14 19:54:00,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7389 conditions, 3211 events. 1566/3211 cut-off events. For 1453/1736 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 21640 event pairs, 915 based on Foata normal form. 45/2780 useless extension candidates. Maximal degree in co-relation 7212. Up to 819 conditions per place. [2024-10-14 19:54:00,227 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 138 selfloop transitions, 141 changer transitions 0/295 dead transitions. [2024-10-14 19:54:00,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 295 transitions, 2093 flow [2024-10-14 19:54:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-14 19:54:00,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-14 19:54:00,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 526 transitions. [2024-10-14 19:54:00,233 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.515686274509804 [2024-10-14 19:54:00,233 INFO L175 Difference]: Start difference. First operand has 101 places, 149 transitions, 854 flow. Second operand 17 states and 526 transitions. [2024-10-14 19:54:00,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 295 transitions, 2093 flow [2024-10-14 19:54:00,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 295 transitions, 2009 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:54:00,243 INFO L231 Difference]: Finished difference. Result has 120 places, 209 transitions, 1495 flow [2024-10-14 19:54:00,245 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1495, PETRI_PLACES=120, PETRI_TRANSITIONS=209} [2024-10-14 19:54:00,246 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 60 predicate places. [2024-10-14 19:54:00,246 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 209 transitions, 1495 flow [2024-10-14 19:54:00,246 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) [2024-10-14 19:54:00,246 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:00,247 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:54:00,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2024-10-14 19:54:00,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:00,447 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-14 19:54:00,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:00,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1391128588, now seen corresponding path program 1 times [2024-10-14 19:54:00,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:00,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417725704] [2024-10-14 19:54:00,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:54:00,448 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:00,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:00,449 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:00,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-14 19:54:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:54:00,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:54:00,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:00,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:54:00,577 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-14 19:54:00,578 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 [2024-10-14 19:54:00,599 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-14 19:54:00,599 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 [2024-10-14 19:54:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 19:54:00,618 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:54:00,619 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:00,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417725704] [2024-10-14 19:54:00,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417725704] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:54:00,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:54:00,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:54:00,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059030255] [2024-10-14 19:54:00,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:54:00,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:54:00,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:00,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:54:00,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:54:00,669 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-10-14 19:54:00,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 209 transitions, 1495 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) [2024-10-14 19:54:00,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:00,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-10-14 19:54:00,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:54:01,054 INFO L124 PetriNetUnfolderBase]: 1491/3021 cut-off events. [2024-10-14 19:54:01,054 INFO L125 PetriNetUnfolderBase]: For 3261/3823 co-relation queries the response was YES. [2024-10-14 19:54:01,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8178 conditions, 3021 events. 1491/3021 cut-off events. For 3261/3823 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 19720 event pairs, 1015 based on Foata normal form. 220/2991 useless extension candidates. Maximal degree in co-relation 7980. Up to 2118 conditions per place. [2024-10-14 19:54:01,071 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 162 selfloop transitions, 28 changer transitions 0/207 dead transitions. [2024-10-14 19:54:01,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 207 transitions, 1871 flow [2024-10-14 19:54:01,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:54:01,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:54:01,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-10-14 19:54:01,074 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4633333333333333 [2024-10-14 19:54:01,074 INFO L175 Difference]: Start difference. First operand has 120 places, 209 transitions, 1495 flow. Second operand 5 states and 139 transitions. [2024-10-14 19:54:01,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 207 transitions, 1871 flow [2024-10-14 19:54:01,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 207 transitions, 1863 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-10-14 19:54:01,087 INFO L231 Difference]: Finished difference. Result has 122 places, 207 transitions, 1539 flow [2024-10-14 19:54:01,087 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1539, PETRI_PLACES=122, PETRI_TRANSITIONS=207} [2024-10-14 19:54:01,088 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 62 predicate places. [2024-10-14 19:54:01,088 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 207 transitions, 1539 flow [2024-10-14 19:54:01,088 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) [2024-10-14 19:54:01,088 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:01,089 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:54:01,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-10-14 19:54:01,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:01,290 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-14 19:54:01,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:01,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1141619079, now seen corresponding path program 1 times [2024-10-14 19:54:01,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:01,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188300775] [2024-10-14 19:54:01,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:54:01,291 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:01,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:01,294 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:01,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-14 19:54:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:54:01,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 19:54:01,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:01,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:54:01,413 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-14 19:54:01,413 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 [2024-10-14 19:54:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 19:54:01,430 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:54:01,430 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:01,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188300775] [2024-10-14 19:54:01,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188300775] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:54:01,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:54:01,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:54:01,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129455403] [2024-10-14 19:54:01,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:54:01,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:54:01,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:01,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:54:01,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:54:01,478 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-14 19:54:01,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 207 transitions, 1539 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:01,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:01,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-14 19:54:01,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:54:01,891 INFO L124 PetriNetUnfolderBase]: 1299/2675 cut-off events. [2024-10-14 19:54:01,892 INFO L125 PetriNetUnfolderBase]: For 2667/3084 co-relation queries the response was YES. [2024-10-14 19:54:01,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7305 conditions, 2675 events. 1299/2675 cut-off events. For 2667/3084 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17129 event pairs, 872 based on Foata normal form. 0/2459 useless extension candidates. Maximal degree in co-relation 7103. Up to 1848 conditions per place. [2024-10-14 19:54:01,907 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 149 selfloop transitions, 40 changer transitions 0/205 dead transitions. [2024-10-14 19:54:01,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 205 transitions, 1913 flow [2024-10-14 19:54:01,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:54:01,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:54:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-10-14 19:54:01,910 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-10-14 19:54:01,910 INFO L175 Difference]: Start difference. First operand has 122 places, 207 transitions, 1539 flow. Second operand 5 states and 143 transitions. [2024-10-14 19:54:01,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 205 transitions, 1913 flow [2024-10-14 19:54:01,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 205 transitions, 1873 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:54:01,923 INFO L231 Difference]: Finished difference. Result has 121 places, 205 transitions, 1575 flow [2024-10-14 19:54:01,923 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1495, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1575, PETRI_PLACES=121, PETRI_TRANSITIONS=205} [2024-10-14 19:54:01,923 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 61 predicate places. [2024-10-14 19:54:01,924 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 205 transitions, 1575 flow [2024-10-14 19:54:01,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:01,924 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:01,924 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:54:01,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-10-14 19:54:02,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:02,128 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-14 19:54:02,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:02,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1141619078, now seen corresponding path program 1 times [2024-10-14 19:54:02,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:02,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863869029] [2024-10-14 19:54:02,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:54:02,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:02,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:02,131 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:02,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-14 19:54:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:54:02,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 19:54:02,231 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:02,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:54:02,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:54:02,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:54:02,361 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 [2024-10-14 19:54:02,376 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:54:02,376 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 [2024-10-14 19:54:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:54:02,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:54:02,679 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 19:54:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:54:02,791 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:02,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863869029] [2024-10-14 19:54:02,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863869029] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:54:02,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:54:02,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:54:02,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486986043] [2024-10-14 19:54:02,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:54:02,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:54:02,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:02,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:54:02,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:54:03,801 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-10-14 19:54:03,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 205 transitions, 1575 flow. Second operand has 14 states, 14 states have (on average 25.142857142857142) internal successors, (352), 14 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:03,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:03,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-10-14 19:54:03,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:54:20,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 19:54:21,104 INFO L124 PetriNetUnfolderBase]: 3586/6281 cut-off events. [2024-10-14 19:54:21,105 INFO L125 PetriNetUnfolderBase]: For 6475/7994 co-relation queries the response was YES. [2024-10-14 19:54:21,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17222 conditions, 6281 events. 3586/6281 cut-off events. For 6475/7994 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 39755 event pairs, 1684 based on Foata normal form. 2/5641 useless extension candidates. Maximal degree in co-relation 17017. Up to 1622 conditions per place. [2024-10-14 19:54:21,137 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 154 selfloop transitions, 161 changer transitions 1/331 dead transitions. [2024-10-14 19:54:21,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 331 transitions, 2735 flow [2024-10-14 19:54:21,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-14 19:54:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-14 19:54:21,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 830 transitions. [2024-10-14 19:54:21,140 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-10-14 19:54:21,141 INFO L175 Difference]: Start difference. First operand has 121 places, 205 transitions, 1575 flow. Second operand 28 states and 830 transitions. [2024-10-14 19:54:21,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 331 transitions, 2735 flow [2024-10-14 19:54:21,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 331 transitions, 2669 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:54:21,162 INFO L231 Difference]: Finished difference. Result has 150 places, 222 transitions, 2005 flow [2024-10-14 19:54:21,162 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1511, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2005, PETRI_PLACES=150, PETRI_TRANSITIONS=222} [2024-10-14 19:54:21,162 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 90 predicate places. [2024-10-14 19:54:21,163 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 222 transitions, 2005 flow [2024-10-14 19:54:21,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 25.142857142857142) internal successors, (352), 14 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:21,163 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:21,163 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:54:21,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-10-14 19:54:21,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:21,364 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-14 19:54:21,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:21,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1139713607, now seen corresponding path program 1 times [2024-10-14 19:54:21,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:21,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970375655] [2024-10-14 19:54:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:54:21,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:21,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:21,367 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:21,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-14 19:54:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:54:21,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 19:54:21,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:54:21,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:54:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:54:21,647 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:21,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970375655] [2024-10-14 19:54:21,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970375655] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:54:21,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:54:21,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-14 19:54:21,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667160010] [2024-10-14 19:54:21,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:54:21,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:54:21,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:21,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:54:21,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:54:21,838 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-14 19:54:21,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 222 transitions, 2005 flow. Second operand has 14 states, 14 states have (on average 28.142857142857142) internal successors, (394), 14 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:21,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:21,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-14 19:54:21,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:54:23,423 INFO L124 PetriNetUnfolderBase]: 5150/8952 cut-off events. [2024-10-14 19:54:23,423 INFO L125 PetriNetUnfolderBase]: For 20264/23546 co-relation queries the response was YES. [2024-10-14 19:54:23,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29469 conditions, 8952 events. 5150/8952 cut-off events. For 20264/23546 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 60393 event pairs, 2590 based on Foata normal form. 252/8661 useless extension candidates. Maximal degree in co-relation 29236. Up to 4081 conditions per place. [2024-10-14 19:54:23,479 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 134 selfloop transitions, 158 changer transitions 0/307 dead transitions. [2024-10-14 19:54:23,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 307 transitions, 2966 flow [2024-10-14 19:54:23,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 19:54:23,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 19:54:23,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 498 transitions. [2024-10-14 19:54:23,482 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-10-14 19:54:23,482 INFO L175 Difference]: Start difference. First operand has 150 places, 222 transitions, 2005 flow. Second operand 14 states and 498 transitions. [2024-10-14 19:54:23,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 307 transitions, 2966 flow [2024-10-14 19:54:23,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 307 transitions, 2897 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-10-14 19:54:23,530 INFO L231 Difference]: Finished difference. Result has 164 places, 229 transitions, 2394 flow [2024-10-14 19:54:23,531 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1946, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2394, PETRI_PLACES=164, PETRI_TRANSITIONS=229} [2024-10-14 19:54:23,533 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 104 predicate places. [2024-10-14 19:54:23,534 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 229 transitions, 2394 flow [2024-10-14 19:54:23,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.142857142857142) internal successors, (394), 14 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:23,534 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:23,534 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:54:23,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2024-10-14 19:54:23,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:23,735 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-14 19:54:23,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:23,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1896044812, now seen corresponding path program 1 times [2024-10-14 19:54:23,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:23,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085807983] [2024-10-14 19:54:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:54:23,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:23,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:23,739 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:23,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-14 19:54:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:54:23,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-14 19:54:23,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:23,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:54:23,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:54:23,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:54:23,983 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 [2024-10-14 19:54:23,995 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:54:23,995 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 [2024-10-14 19:54:24,047 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-10-14 19:54:24,048 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 16 treesize of output 18 [2024-10-14 19:54:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:54:24,243 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:54:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:54:24,684 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:24,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085807983] [2024-10-14 19:54:24,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085807983] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:54:24,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:54:24,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:54:24,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76549697] [2024-10-14 19:54:24,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:54:24,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:54:24,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:24,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:54:24,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:54:27,463 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-10-14 19:54:27,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 229 transitions, 2394 flow. Second operand has 14 states, 14 states have (on average 21.428571428571427) internal successors, (300), 14 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:27,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:27,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-10-14 19:54:27,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:54:33,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 19:54:35,302 INFO L124 PetriNetUnfolderBase]: 6021/10811 cut-off events. [2024-10-14 19:54:35,302 INFO L125 PetriNetUnfolderBase]: For 37022/43681 co-relation queries the response was YES. [2024-10-14 19:54:35,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37316 conditions, 10811 events. 6021/10811 cut-off events. For 37022/43681 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 80041 event pairs, 2230 based on Foata normal form. 37/10022 useless extension candidates. Maximal degree in co-relation 37051. Up to 2117 conditions per place. [2024-10-14 19:54:35,382 INFO L140 encePairwiseOnDemand]: 45/60 looper letters, 196 selfloop transitions, 152 changer transitions 0/359 dead transitions. [2024-10-14 19:54:35,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 359 transitions, 3905 flow [2024-10-14 19:54:35,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-14 19:54:35,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-14 19:54:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 556 transitions. [2024-10-14 19:54:35,386 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48771929824561405 [2024-10-14 19:54:35,386 INFO L175 Difference]: Start difference. First operand has 164 places, 229 transitions, 2394 flow. Second operand 19 states and 556 transitions. [2024-10-14 19:54:35,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 359 transitions, 3905 flow [2024-10-14 19:54:35,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 359 transitions, 3631 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-10-14 19:54:35,463 INFO L231 Difference]: Finished difference. Result has 174 places, 239 transitions, 2516 flow [2024-10-14 19:54:35,463 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2166, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2516, PETRI_PLACES=174, PETRI_TRANSITIONS=239} [2024-10-14 19:54:35,464 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 114 predicate places. [2024-10-14 19:54:35,464 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 239 transitions, 2516 flow [2024-10-14 19:54:35,464 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.428571428571427) internal successors, (300), 14 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:35,464 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:35,465 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:54:35,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2024-10-14 19:54:35,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:35,666 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-14 19:54:35,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:35,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1879243842, now seen corresponding path program 1 times [2024-10-14 19:54:35,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:35,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794312228] [2024-10-14 19:54:35,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:54:35,667 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:35,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:35,668 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:35,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-10-14 19:54:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:54:35,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 19:54:35,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:54:35,863 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:54:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:54:35,975 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:35,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794312228] [2024-10-14 19:54:35,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794312228] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:54:35,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:54:35,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-14 19:54:35,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357574757] [2024-10-14 19:54:35,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:54:35,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:54:35,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:35,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:54:35,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:54:36,176 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-14 19:54:36,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 239 transitions, 2516 flow. Second operand has 14 states, 14 states have (on average 28.428571428571427) internal successors, (398), 14 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:36,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:36,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-14 19:54:36,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:54:38,011 INFO L124 PetriNetUnfolderBase]: 5776/10785 cut-off events. [2024-10-14 19:54:38,011 INFO L125 PetriNetUnfolderBase]: For 28082/31106 co-relation queries the response was YES. [2024-10-14 19:54:38,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37023 conditions, 10785 events. 5776/10785 cut-off events. For 28082/31106 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 82666 event pairs, 3052 based on Foata normal form. 390/10618 useless extension candidates. Maximal degree in co-relation 36753. Up to 4805 conditions per place. [2024-10-14 19:54:38,083 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 145 selfloop transitions, 158 changer transitions 0/322 dead transitions. [2024-10-14 19:54:38,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 322 transitions, 3520 flow [2024-10-14 19:54:38,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 19:54:38,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 19:54:38,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 494 transitions. [2024-10-14 19:54:38,085 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5880952380952381 [2024-10-14 19:54:38,086 INFO L175 Difference]: Start difference. First operand has 174 places, 239 transitions, 2516 flow. Second operand 14 states and 494 transitions. [2024-10-14 19:54:38,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 322 transitions, 3520 flow [2024-10-14 19:54:38,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 322 transitions, 3330 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-10-14 19:54:38,138 INFO L231 Difference]: Finished difference. Result has 179 places, 241 transitions, 2690 flow [2024-10-14 19:54:38,138 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2329, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2690, PETRI_PLACES=179, PETRI_TRANSITIONS=241} [2024-10-14 19:54:38,139 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 119 predicate places. [2024-10-14 19:54:38,139 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 241 transitions, 2690 flow [2024-10-14 19:54:38,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.428571428571427) internal successors, (398), 14 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:38,139 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:38,139 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:54:38,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2024-10-14 19:54:38,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:38,339 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-14 19:54:38,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:38,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1352153818, now seen corresponding path program 1 times [2024-10-14 19:54:38,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:38,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626825543] [2024-10-14 19:54:38,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:54:38,426 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:38,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:38,428 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:38,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-10-14 19:54:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:54:38,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 19:54:38,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:38,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:54:38,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:54:38,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:54:38,627 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 [2024-10-14 19:54:38,643 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:54:38,644 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 [2024-10-14 19:54:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:54:38,784 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:54:38,996 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 19:54:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:54:39,082 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:39,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626825543] [2024-10-14 19:54:39,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626825543] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:54:39,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:54:39,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:54:39,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497923223] [2024-10-14 19:54:39,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:54:39,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:54:39,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:39,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:54:39,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:54:40,108 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-10-14 19:54:40,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 241 transitions, 2690 flow. Second operand has 14 states, 14 states have (on average 25.428571428571427) internal successors, (356), 14 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:40,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:40,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-10-14 19:54:40,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:54:43,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 19:54:55,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 19:54:57,174 INFO L124 PetriNetUnfolderBase]: 5172/10073 cut-off events. [2024-10-14 19:54:57,174 INFO L125 PetriNetUnfolderBase]: For 39819/44961 co-relation queries the response was YES. [2024-10-14 19:54:57,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36646 conditions, 10073 events. 5172/10073 cut-off events. For 39819/44961 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 79363 event pairs, 2191 based on Foata normal form. 34/9261 useless extension candidates. Maximal degree in co-relation 36362. Up to 2292 conditions per place. [2024-10-14 19:54:57,238 INFO L140 encePairwiseOnDemand]: 45/60 looper letters, 174 selfloop transitions, 170 changer transitions 0/363 dead transitions. [2024-10-14 19:54:57,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 363 transitions, 4100 flow [2024-10-14 19:54:57,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-14 19:54:57,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-10-14 19:54:57,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 852 transitions. [2024-10-14 19:54:57,241 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4896551724137931 [2024-10-14 19:54:57,241 INFO L175 Difference]: Start difference. First operand has 179 places, 241 transitions, 2690 flow. Second operand 29 states and 852 transitions. [2024-10-14 19:54:57,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 363 transitions, 4100 flow [2024-10-14 19:54:57,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 363 transitions, 3755 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-10-14 19:54:57,310 INFO L231 Difference]: Finished difference. Result has 203 places, 253 transitions, 2857 flow [2024-10-14 19:54:57,310 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2381, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2857, PETRI_PLACES=203, PETRI_TRANSITIONS=253} [2024-10-14 19:54:57,310 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 143 predicate places. [2024-10-14 19:54:57,310 INFO L471 AbstractCegarLoop]: Abstraction has has 203 places, 253 transitions, 2857 flow [2024-10-14 19:54:57,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 25.428571428571427) internal successors, (356), 14 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:57,311 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:57,311 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:54:57,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2024-10-14 19:54:57,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:57,512 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-10-14 19:54:57,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:57,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1032903660, now seen corresponding path program 1 times [2024-10-14 19:54:57,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:57,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710151853] [2024-10-14 19:54:57,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:54:57,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:57,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:57,513 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:57,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-10-14 19:54:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:54:57,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 19:54:57,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:54:57,659 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:54:57,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2024-10-14 19:54:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:54:57,817 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:57,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710151853] [2024-10-14 19:54:57,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710151853] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:54:57,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:54:57,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-14 19:54:57,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746815309] [2024-10-14 19:54:57,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:54:57,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:54:57,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:57,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:54:57,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:54:58,286 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-10-14 19:54:58,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 253 transitions, 2857 flow. Second operand has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:58,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:58,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-10-14 19:54:58,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand