./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-commit-1.wvr-bad.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-commit-1.wvr-bad.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 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:52:48,960 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:52:49,029 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:52:49,034 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:52:49,036 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:52:49,078 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:52:49,079 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:52:49,079 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:52:49,080 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:52:49,081 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:52:49,082 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:52:49,083 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:52:49,083 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:52:49,084 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:52:49,085 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:52:49,086 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:52:49,086 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:52:49,086 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:52:49,087 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:52:49,087 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:52:49,087 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:52:49,090 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:52:49,090 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:52:49,091 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:52:49,091 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:52:49,091 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:52:49,092 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:52:49,092 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:52:49,092 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:52:49,093 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:52:49,093 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:52:49,093 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:52:49,093 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:52:49,094 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:52:49,094 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:52:49,094 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:52:49,094 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:52:49,095 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:52:49,095 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:52:49,096 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:52:49,096 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:52:49,097 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:52:49,098 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2024-10-14 19:52:49,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:52:49,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:52:49,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:52:49,403 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:52:49,404 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:52:49,405 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-10-14 19:52:50,817 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:52:51,071 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:52:51,073 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-10-14 19:52:51,086 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f24fc4a6d/04fe01d1de3748b7badb619f5b495365/FLAG96becd01e [2024-10-14 19:52:51,417 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f24fc4a6d/04fe01d1de3748b7badb619f5b495365 [2024-10-14 19:52:51,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:52:51,420 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:52:51,421 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:52:51,422 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:52:51,428 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:52:51,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:52:51" (1/1) ... [2024-10-14 19:52:51,430 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34a9fa08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:52:51, skipping insertion in model container [2024-10-14 19:52:51,430 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:52:51" (1/1) ... [2024-10-14 19:52:51,465 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:52:51,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:52:51,658 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 19:52:51,659 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3c9e69f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:52:51, skipping insertion in model container [2024-10-14 19:52:51,659 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:52:51,659 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-14 19:52:51,661 INFO L158 Benchmark]: Toolchain (without parser) took 239.95ms. Allocated memory is still 172.0MB. Free memory was 134.9MB in the beginning and 123.7MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-14 19:52:51,662 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 172.0MB. Free memory is still 139.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 19:52:51,662 INFO L158 Benchmark]: CACSL2BoogieTranslator took 237.89ms. Allocated memory is still 172.0MB. Free memory was 134.9MB in the beginning and 123.7MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-14 19:52:51,663 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 172.0MB. Free memory is still 139.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 237.89ms. Allocated memory is still 172.0MB. Free memory was 134.9MB in the beginning and 123.7MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 171]: 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-commit-1.wvr-bad.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 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:52:53,662 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:52:53,714 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-14 19:52:53,719 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:52:53,720 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:52:53,748 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:52:53,751 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:52:53,751 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:52:53,752 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:52:53,753 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:52:53,753 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:52:53,753 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:52:53,754 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:52:53,756 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:52:53,756 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:52:53,757 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:52:53,757 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:52:53,757 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:52:53,758 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:52:53,758 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:52:53,761 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:52:53,762 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:52:53,762 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:52:53,762 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:52:53,763 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:52:53,763 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-14 19:52:53,763 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:52:53,763 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-14 19:52:53,763 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:52:53,764 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:52:53,764 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:52:53,764 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:52:53,764 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:52:53,765 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:52:53,765 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:52:53,765 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:52:53,766 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:52:53,766 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:52:53,766 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-14 19:52:53,766 INFO L153 SettingsManager]: * Command for external solver=cvc5 --incremental --print-success --lang smt [2024-10-14 19:52:53,767 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:52:53,767 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:52:53,768 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:52:53,768 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:52:53,768 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-14 19:52:53,768 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2024-10-14 19:52:54,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:52:54,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:52:54,119 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:52:54,121 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:52:54,122 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:52:54,124 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-10-14 19:52:55,723 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:52:55,903 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:52:55,904 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-10-14 19:52:55,915 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea0df627b/8b9ae8eb778a4e4fa78d83d826ec3ab1/FLAG741fc9ee0 [2024-10-14 19:52:55,933 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea0df627b/8b9ae8eb778a4e4fa78d83d826ec3ab1 [2024-10-14 19:52:55,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:52:55,937 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:52:55,940 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:52:55,941 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:52:55,946 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:52:55,946 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:52:55" (1/1) ... [2024-10-14 19:52:55,947 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15e8eef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:52:55, skipping insertion in model container [2024-10-14 19:52:55,947 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:52:55" (1/1) ... [2024-10-14 19:52:55,979 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:52:56,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:52:56,253 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-14 19:52:56,263 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:52:56,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:52:56,301 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:52:56,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:52:56,360 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:52:56,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:52:56 WrapperNode [2024-10-14 19:52:56,360 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:52:56,362 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:52:56,362 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:52:56,362 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:52:56,368 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:52:56" (1/1) ... [2024-10-14 19:52:56,383 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:52:56" (1/1) ... [2024-10-14 19:52:56,419 INFO L138 Inliner]: procedures = 26, calls = 54, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 328 [2024-10-14 19:52:56,419 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:52:56,420 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:52:56,420 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:52:56,420 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:52:56,435 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:52:56" (1/1) ... [2024-10-14 19:52:56,436 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:52:56" (1/1) ... [2024-10-14 19:52:56,447 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:52:56" (1/1) ... [2024-10-14 19:52:56,486 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-10-14 19:52:56,486 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:52:56" (1/1) ... [2024-10-14 19:52:56,486 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:52:56" (1/1) ... [2024-10-14 19:52:56,500 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:52:56" (1/1) ... [2024-10-14 19:52:56,509 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:52:56" (1/1) ... [2024-10-14 19:52:56,514 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:52:56" (1/1) ... [2024-10-14 19:52:56,516 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:52:56" (1/1) ... [2024-10-14 19:52:56,521 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:52:56,526 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:52:56,526 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:52:56,526 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:52:56,527 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:52:56" (1/1) ... [2024-10-14 19:52:56,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:52:56,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:52:56,559 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 19:52:56,566 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 19:52:56,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:52:56,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-14 19:52:56,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-14 19:52:56,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-14 19:52:56,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-14 19:52:56,608 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 19:52:56,608 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 19:52:56,608 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 19:52:56,608 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 19:52:56,608 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-14 19:52:56,608 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-14 19:52:56,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 19:52:56,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 19:52:56,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 19:52:56,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:52:56,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:52:56,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-14 19:52:56,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-14 19:52:56,613 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 19:52:56,735 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:52:56,737 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:52:57,450 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:52:57,450 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:52:57,892 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:52:57,892 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-14 19:52:57,893 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:52:57 BoogieIcfgContainer [2024-10-14 19:52:57,893 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:52:57,895 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:52:57,895 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:52:57,898 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:52:57,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:52:55" (1/3) ... [2024-10-14 19:52:57,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38af39c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:52:57, skipping insertion in model container [2024-10-14 19:52:57,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:52:56" (2/3) ... [2024-10-14 19:52:57,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38af39c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:52:57, skipping insertion in model container [2024-10-14 19:52:57,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:52:57" (3/3) ... [2024-10-14 19:52:57,901 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2024-10-14 19:52:57,918 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:52:57,919 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2024-10-14 19:52:57,919 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:52:57,998 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-14 19:52:58,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 88 transitions, 197 flow [2024-10-14 19:52:58,079 INFO L124 PetriNetUnfolderBase]: 17/85 cut-off events. [2024-10-14 19:52:58,080 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-14 19:52:58,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 85 events. 17/85 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 248 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 64. Up to 6 conditions per place. [2024-10-14 19:52:58,086 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 88 transitions, 197 flow [2024-10-14 19:52:58,091 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 84 transitions, 186 flow [2024-10-14 19:52:58,099 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:52:58,108 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;@685c9994, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:52:58,108 INFO L334 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2024-10-14 19:52:58,112 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:52:58,112 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-14 19:52:58,112 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:52:58,112 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:52:58,113 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:52:58,114 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:52:58,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:52:58,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1023853, now seen corresponding path program 1 times [2024-10-14 19:52:58,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:52:58,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267526809] [2024-10-14 19:52:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:52:58,133 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 19:52:58,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:52:58,136 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 19:52:58,138 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 19:52:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:52:58,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:52:58,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:52:58,284 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 19:52:58,299 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 19:52:58,300 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:52:58,300 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:52:58,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267526809] [2024-10-14 19:52:58,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267526809] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:52:58,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:52:58,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:52:58,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472936359] [2024-10-14 19:52:58,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:52:58,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:52:58,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:52:58,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:52:58,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:52:58,372 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-10-14 19:52:58,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 186 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 19:52:58,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:52:58,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-10-14 19:52:58,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:52:59,912 INFO L124 PetriNetUnfolderBase]: 7268/10570 cut-off events. [2024-10-14 19:52:59,913 INFO L125 PetriNetUnfolderBase]: For 336/336 co-relation queries the response was YES. [2024-10-14 19:52:59,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20386 conditions, 10570 events. 7268/10570 cut-off events. For 336/336 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 70027 event pairs, 5236 based on Foata normal form. 1/5686 useless extension candidates. Maximal degree in co-relation 19698. Up to 9450 conditions per place. [2024-10-14 19:53:00,021 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 54 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2024-10-14 19:53:00,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 76 transitions, 282 flow [2024-10-14 19:53:00,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:53:00,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:53:00,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2024-10-14 19:53:00,033 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-10-14 19:53:00,035 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 186 flow. Second operand 3 states and 135 transitions. [2024-10-14 19:53:00,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 76 transitions, 282 flow [2024-10-14 19:53:00,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 270 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-14 19:53:00,046 INFO L231 Difference]: Finished difference. Result has 68 places, 76 transitions, 162 flow [2024-10-14 19:53:00,048 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=68, PETRI_TRANSITIONS=76} [2024-10-14 19:53:00,054 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, -9 predicate places. [2024-10-14 19:53:00,054 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 76 transitions, 162 flow [2024-10-14 19:53:00,055 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 19:53:00,055 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:00,055 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:53:00,060 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 19:53:00,256 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 19:53:00,257 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:53:00,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:00,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1023854, now seen corresponding path program 1 times [2024-10-14 19:53:00,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:00,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741902723] [2024-10-14 19:53:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:00,259 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 19:53:00,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:00,261 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 19:53:00,262 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 19:53:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:00,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 19:53:00,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:00,367 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 19:53:00,446 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 19:53:00,446 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:00,447 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:00,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741902723] [2024-10-14 19:53:00,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741902723] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:00,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:00,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:53:00,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024950720] [2024-10-14 19:53:00,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:00,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:53:00,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:00,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:53:00,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:53:00,476 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-10-14 19:53:00,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 76 transitions, 162 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 19:53:00,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:00,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-10-14 19:53:00,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:01,915 INFO L124 PetriNetUnfolderBase]: 7271/10579 cut-off events. [2024-10-14 19:53:01,915 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-10-14 19:53:01,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20186 conditions, 10579 events. 7271/10579 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 69987 event pairs, 5236 based on Foata normal form. 0/5690 useless extension candidates. Maximal degree in co-relation 20136. Up to 9463 conditions per place. [2024-10-14 19:53:01,981 INFO L140 encePairwiseOnDemand]: 75/88 looper letters, 58 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-10-14 19:53:01,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 85 transitions, 318 flow [2024-10-14 19:53:01,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:53:01,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:53:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 167 transitions. [2024-10-14 19:53:01,985 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-10-14 19:53:01,985 INFO L175 Difference]: Start difference. First operand has 68 places, 76 transitions, 162 flow. Second operand 4 states and 167 transitions. [2024-10-14 19:53:01,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 85 transitions, 318 flow [2024-10-14 19:53:01,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 85 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:53:01,990 INFO L231 Difference]: Finished difference. Result has 72 places, 85 transitions, 240 flow [2024-10-14 19:53:01,990 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=240, PETRI_PLACES=72, PETRI_TRANSITIONS=85} [2024-10-14 19:53:01,993 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, -5 predicate places. [2024-10-14 19:53:01,993 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 85 transitions, 240 flow [2024-10-14 19:53:01,994 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 19:53:01,994 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:01,994 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-14 19:53:02,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-10-14 19:53:02,197 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 19:53:02,198 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:53:02,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:02,198 INFO L85 PathProgramCache]: Analyzing trace with hash 983957718, now seen corresponding path program 1 times [2024-10-14 19:53:02,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:02,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874642179] [2024-10-14 19:53:02,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:02,199 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 19:53:02,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:02,201 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 19:53:02,202 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 19:53:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:02,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 19:53:02,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:02,281 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 8 treesize of output 7 [2024-10-14 19:53:02,437 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 19:53:02,437 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:53:02,703 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 19:53:02,703 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:02,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874642179] [2024-10-14 19:53:02,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874642179] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:53:02,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:53:02,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:53:02,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014360784] [2024-10-14 19:53:02,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:53:02,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:53:02,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:02,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:53:02,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:53:02,916 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-10-14 19:53:02,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 85 transitions, 240 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 19:53:02,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:02,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-10-14 19:53:02,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:05,505 INFO L124 PetriNetUnfolderBase]: 7280/10606 cut-off events. [2024-10-14 19:53:05,505 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2024-10-14 19:53:05,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20304 conditions, 10606 events. 7280/10606 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 70309 event pairs, 5236 based on Foata normal form. 0/5717 useless extension candidates. Maximal degree in co-relation 20150. Up to 9466 conditions per place. [2024-10-14 19:53:05,569 INFO L140 encePairwiseOnDemand]: 75/88 looper letters, 58 selfloop transitions, 37 changer transitions 0/112 dead transitions. [2024-10-14 19:53:05,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 112 transitions, 550 flow [2024-10-14 19:53:05,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 19:53:05,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 19:53:05,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 344 transitions. [2024-10-14 19:53:05,576 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-10-14 19:53:05,577 INFO L175 Difference]: Start difference. First operand has 72 places, 85 transitions, 240 flow. Second operand 10 states and 344 transitions. [2024-10-14 19:53:05,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 112 transitions, 550 flow [2024-10-14 19:53:05,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 112 transitions, 550 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:53:05,582 INFO L231 Difference]: Finished difference. Result has 84 places, 112 transitions, 484 flow [2024-10-14 19:53:05,582 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=484, PETRI_PLACES=84, PETRI_TRANSITIONS=112} [2024-10-14 19:53:05,583 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, 7 predicate places. [2024-10-14 19:53:05,583 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 112 transitions, 484 flow [2024-10-14 19:53:05,583 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 19:53:05,583 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:05,583 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:05,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-10-14 19:53:05,787 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 19:53:05,787 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:53:05,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:05,788 INFO L85 PathProgramCache]: Analyzing trace with hash -599740410, now seen corresponding path program 1 times [2024-10-14 19:53:05,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:05,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749826433] [2024-10-14 19:53:05,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:05,789 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 19:53:05,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:05,792 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 19:53:05,793 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 19:53:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:05,859 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:53:05,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:05,886 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 19:53:05,887 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:05,887 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:05,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749826433] [2024-10-14 19:53:05,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749826433] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:05,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:05,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:53:05,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499440957] [2024-10-14 19:53:05,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:05,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:53:05,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:05,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:53:05,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:53:05,889 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-10-14 19:53:05,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 112 transitions, 484 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 19:53:05,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:05,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-10-14 19:53:05,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:07,401 INFO L124 PetriNetUnfolderBase]: 12127/17692 cut-off events. [2024-10-14 19:53:07,401 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-10-14 19:53:07,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33903 conditions, 17692 events. 12127/17692 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 1341. Compared 122457 event pairs, 4256 based on Foata normal form. 356/10144 useless extension candidates. Maximal degree in co-relation 33814. Up to 9751 conditions per place. [2024-10-14 19:53:07,502 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 126 selfloop transitions, 3 changer transitions 0/149 dead transitions. [2024-10-14 19:53:07,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 149 transitions, 820 flow [2024-10-14 19:53:07,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:53:07,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:53:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2024-10-14 19:53:07,504 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-10-14 19:53:07,504 INFO L175 Difference]: Start difference. First operand has 84 places, 112 transitions, 484 flow. Second operand 3 states and 180 transitions. [2024-10-14 19:53:07,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 149 transitions, 820 flow [2024-10-14 19:53:07,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 149 transitions, 725 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-10-14 19:53:07,512 INFO L231 Difference]: Finished difference. Result has 83 places, 114 transitions, 418 flow [2024-10-14 19:53:07,513 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=418, PETRI_PLACES=83, PETRI_TRANSITIONS=114} [2024-10-14 19:53:07,515 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, 6 predicate places. [2024-10-14 19:53:07,515 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 114 transitions, 418 flow [2024-10-14 19:53:07,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 19:53:07,515 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:07,515 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:07,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-14 19:53:07,718 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 19:53:07,719 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:53:07,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:07,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1412081420, now seen corresponding path program 1 times [2024-10-14 19:53:07,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:07,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864951792] [2024-10-14 19:53:07,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:07,720 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 19:53:07,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:07,723 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 19:53:07,724 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 19:53:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:07,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:53:07,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:07,821 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 19:53:07,822 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:07,822 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:07,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864951792] [2024-10-14 19:53:07,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864951792] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:07,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:07,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:53:07,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96411231] [2024-10-14 19:53:07,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:07,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:53:07,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:07,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:53:07,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:53:07,840 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 88 [2024-10-14 19:53:07,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 114 transitions, 418 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 19:53:07,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:07,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 88 [2024-10-14 19:53:07,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:09,603 INFO L124 PetriNetUnfolderBase]: 15273/21916 cut-off events. [2024-10-14 19:53:09,603 INFO L125 PetriNetUnfolderBase]: For 1289/1313 co-relation queries the response was YES. [2024-10-14 19:53:09,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45148 conditions, 21916 events. 15273/21916 cut-off events. For 1289/1313 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 139191 event pairs, 5655 based on Foata normal form. 0/14487 useless extension candidates. Maximal degree in co-relation 45071. Up to 10528 conditions per place. [2024-10-14 19:53:09,746 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 127 selfloop transitions, 4 changer transitions 0/146 dead transitions. [2024-10-14 19:53:09,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 146 transitions, 752 flow [2024-10-14 19:53:09,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:53:09,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:53:09,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2024-10-14 19:53:09,748 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-10-14 19:53:09,748 INFO L175 Difference]: Start difference. First operand has 83 places, 114 transitions, 418 flow. Second operand 3 states and 160 transitions. [2024-10-14 19:53:09,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 146 transitions, 752 flow [2024-10-14 19:53:09,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 146 transitions, 749 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:53:09,753 INFO L231 Difference]: Finished difference. Result has 86 places, 115 transitions, 437 flow [2024-10-14 19:53:09,753 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=437, PETRI_PLACES=86, PETRI_TRANSITIONS=115} [2024-10-14 19:53:09,756 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, 9 predicate places. [2024-10-14 19:53:09,756 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 115 transitions, 437 flow [2024-10-14 19:53:09,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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 19:53:09,757 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:09,757 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-14 19:53:09,762 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 19:53:09,960 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 19:53:09,960 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:53:09,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:09,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1317877490, now seen corresponding path program 2 times [2024-10-14 19:53:09,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:09,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672436229] [2024-10-14 19:53:09,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:53:09,962 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 19:53:09,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:09,967 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 19:53:09,969 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 19:53:10,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:53:10,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:53:10,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 19:53:10,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:10,056 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 19:53:10,305 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 19:53:10,305 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:53:10,772 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 19:53:10,773 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:10,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672436229] [2024-10-14 19:53:10,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672436229] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:53:10,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:53:10,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:53:10,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599456443] [2024-10-14 19:53:10,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:53:10,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:53:10,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:10,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:53:10,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:53:11,028 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-10-14 19:53:11,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 115 transitions, 437 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 19:53:11,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:11,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-10-14 19:53:11,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:14,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:53:17,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:53:20,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:53:26,644 INFO L124 PetriNetUnfolderBase]: 12734/19110 cut-off events. [2024-10-14 19:53:26,644 INFO L125 PetriNetUnfolderBase]: For 3631/3835 co-relation queries the response was YES. [2024-10-14 19:53:26,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40520 conditions, 19110 events. 12734/19110 cut-off events. For 3631/3835 co-relation queries the response was YES. Maximal size of possible extension queue 845. Compared 130430 event pairs, 9322 based on Foata normal form. 18/12485 useless extension candidates. Maximal degree in co-relation 40247. Up to 16766 conditions per place. [2024-10-14 19:53:26,753 INFO L140 encePairwiseOnDemand]: 75/88 looper letters, 60 selfloop transitions, 91 changer transitions 0/169 dead transitions. [2024-10-14 19:53:26,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 169 transitions, 1003 flow [2024-10-14 19:53:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 19:53:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-14 19:53:26,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 695 transitions. [2024-10-14 19:53:26,758 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3589876033057851 [2024-10-14 19:53:26,758 INFO L175 Difference]: Start difference. First operand has 86 places, 115 transitions, 437 flow. Second operand 22 states and 695 transitions. [2024-10-14 19:53:26,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 169 transitions, 1003 flow [2024-10-14 19:53:26,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 169 transitions, 995 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:53:26,765 INFO L231 Difference]: Finished difference. Result has 111 places, 169 transitions, 961 flow [2024-10-14 19:53:26,765 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=961, PETRI_PLACES=111, PETRI_TRANSITIONS=169} [2024-10-14 19:53:26,766 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, 34 predicate places. [2024-10-14 19:53:26,766 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 169 transitions, 961 flow [2024-10-14 19:53:26,767 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 19:53:26,767 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:26,767 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:26,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2024-10-14 19:53:26,967 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 19:53:26,968 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:53:26,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:26,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1060342135, now seen corresponding path program 1 times [2024-10-14 19:53:26,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:26,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475443054] [2024-10-14 19:53:26,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:26,969 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 19:53:26,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:26,972 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 19:53:26,973 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 19:53:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:27,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 19:53:27,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:27,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:53:27,054 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 19:53:27,054 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:27,054 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:27,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475443054] [2024-10-14 19:53:27,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475443054] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:27,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:27,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:53:27,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900274549] [2024-10-14 19:53:27,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:27,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:53:27,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:27,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:53:27,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:53:27,084 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-10-14 19:53:27,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 169 transitions, 961 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 19:53:27,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:27,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-10-14 19:53:27,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:28,171 INFO L124 PetriNetUnfolderBase]: 10956/16485 cut-off events. [2024-10-14 19:53:28,171 INFO L125 PetriNetUnfolderBase]: For 2160/2344 co-relation queries the response was YES. [2024-10-14 19:53:28,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34530 conditions, 16485 events. 10956/16485 cut-off events. For 2160/2344 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 109503 event pairs, 7889 based on Foata normal form. 0/10975 useless extension candidates. Maximal degree in co-relation 34410. Up to 14368 conditions per place. [2024-10-14 19:53:28,260 INFO L140 encePairwiseOnDemand]: 84/88 looper letters, 134 selfloop transitions, 12 changer transitions 0/167 dead transitions. [2024-10-14 19:53:28,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 167 transitions, 1249 flow [2024-10-14 19:53:28,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:53:28,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:53:28,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-10-14 19:53:28,261 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-10-14 19:53:28,261 INFO L175 Difference]: Start difference. First operand has 111 places, 169 transitions, 961 flow. Second operand 4 states and 152 transitions. [2024-10-14 19:53:28,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 167 transitions, 1249 flow [2024-10-14 19:53:28,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 167 transitions, 1017 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-10-14 19:53:28,270 INFO L231 Difference]: Finished difference. Result has 103 places, 167 transitions, 749 flow [2024-10-14 19:53:28,270 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=749, PETRI_PLACES=103, PETRI_TRANSITIONS=167} [2024-10-14 19:53:28,271 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, 26 predicate places. [2024-10-14 19:53:28,271 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 167 transitions, 749 flow [2024-10-14 19:53:28,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 19:53:28,271 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:28,272 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:28,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-14 19:53:28,472 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 19:53:28,473 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:53:28,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:28,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1060342136, now seen corresponding path program 1 times [2024-10-14 19:53:28,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:28,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553228970] [2024-10-14 19:53:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:28,474 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 19:53:28,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:28,475 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 19:53:28,476 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 19:53:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:28,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:53:28,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:28,556 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 19:53:28,557 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:28,557 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:28,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553228970] [2024-10-14 19:53:28,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553228970] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:28,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:28,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:53:28,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482114954] [2024-10-14 19:53:28,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:28,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:53:28,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:28,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:53:28,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:53:28,559 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-10-14 19:53:28,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 167 transitions, 749 flow. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:28,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:28,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-10-14 19:53:28,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:30,716 INFO L124 PetriNetUnfolderBase]: 17408/26138 cut-off events. [2024-10-14 19:53:30,716 INFO L125 PetriNetUnfolderBase]: For 3141/3305 co-relation queries the response was YES. [2024-10-14 19:53:30,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54845 conditions, 26138 events. 17408/26138 cut-off events. For 3141/3305 co-relation queries the response was YES. Maximal size of possible extension queue 912. Compared 178963 event pairs, 7188 based on Foata normal form. 457/18065 useless extension candidates. Maximal degree in co-relation 54742. Up to 12124 conditions per place. [2024-10-14 19:53:30,923 INFO L140 encePairwiseOnDemand]: 84/88 looper letters, 183 selfloop transitions, 2 changer transitions 0/206 dead transitions. [2024-10-14 19:53:30,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 206 transitions, 1221 flow [2024-10-14 19:53:30,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:53:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:53:30,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 176 transitions. [2024-10-14 19:53:30,924 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-10-14 19:53:30,925 INFO L175 Difference]: Start difference. First operand has 103 places, 167 transitions, 749 flow. Second operand 3 states and 176 transitions. [2024-10-14 19:53:30,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 206 transitions, 1221 flow [2024-10-14 19:53:30,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 206 transitions, 1208 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:53:30,938 INFO L231 Difference]: Finished difference. Result has 104 places, 168 transitions, 750 flow [2024-10-14 19:53:30,939 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=736, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=750, PETRI_PLACES=104, PETRI_TRANSITIONS=168} [2024-10-14 19:53:30,939 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, 27 predicate places. [2024-10-14 19:53:30,939 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 168 transitions, 750 flow [2024-10-14 19:53:30,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:30,940 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:30,940 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:30,943 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 19:53:31,140 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 19:53:31,141 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:53:31,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:31,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1489130052, now seen corresponding path program 1 times [2024-10-14 19:53:31,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:31,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1816871872] [2024-10-14 19:53:31,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:31,142 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 19:53:31,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:31,145 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 19:53:31,146 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 19:53:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:31,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:53:31,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:31,231 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 19:53:31,231 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:31,231 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:31,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1816871872] [2024-10-14 19:53:31,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1816871872] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:31,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:31,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:53:31,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376735817] [2024-10-14 19:53:31,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:31,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:53:31,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:31,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:53:31,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:53:31,237 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-10-14 19:53:31,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 168 transitions, 750 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 19:53:31,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:31,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-10-14 19:53:31,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:33,515 INFO L124 PetriNetUnfolderBase]: 21825/31645 cut-off events. [2024-10-14 19:53:33,515 INFO L125 PetriNetUnfolderBase]: For 4216/4522 co-relation queries the response was YES. [2024-10-14 19:53:33,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67372 conditions, 31645 events. 21825/31645 cut-off events. For 4216/4522 co-relation queries the response was YES. Maximal size of possible extension queue 1330. Compared 206806 event pairs, 10570 based on Foata normal form. 0/22155 useless extension candidates. Maximal degree in co-relation 67268. Up to 18178 conditions per place. [2024-10-14 19:53:33,742 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 180 selfloop transitions, 4 changer transitions 0/202 dead transitions. [2024-10-14 19:53:33,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 202 transitions, 1207 flow [2024-10-14 19:53:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:53:33,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:53:33,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2024-10-14 19:53:33,744 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-14 19:53:33,744 INFO L175 Difference]: Start difference. First operand has 104 places, 168 transitions, 750 flow. Second operand 3 states and 165 transitions. [2024-10-14 19:53:33,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 202 transitions, 1207 flow [2024-10-14 19:53:33,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 202 transitions, 1205 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:53:33,754 INFO L231 Difference]: Finished difference. Result has 107 places, 168 transitions, 766 flow [2024-10-14 19:53:33,754 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=766, PETRI_PLACES=107, PETRI_TRANSITIONS=168} [2024-10-14 19:53:33,755 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, 30 predicate places. [2024-10-14 19:53:33,755 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 168 transitions, 766 flow [2024-10-14 19:53:33,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 19:53:33,756 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:33,756 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:33,760 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 19:53:33,958 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 19:53:33,959 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:53:33,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:33,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1154851323, now seen corresponding path program 1 times [2024-10-14 19:53:33,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:33,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129047049] [2024-10-14 19:53:33,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:33,960 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 19:53:33,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:33,961 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 19:53:33,962 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 19:53:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:34,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 19:53:34,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:34,092 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 19:53:34,092 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:34,092 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:34,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129047049] [2024-10-14 19:53:34,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129047049] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:34,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:34,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:53:34,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082153560] [2024-10-14 19:53:34,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:34,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:53:34,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:34,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:53:34,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:53:34,109 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-10-14 19:53:34,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 168 transitions, 766 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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 19:53:34,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:34,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-10-14 19:53:34,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:35,912 INFO L124 PetriNetUnfolderBase]: 19240/28999 cut-off events. [2024-10-14 19:53:35,912 INFO L125 PetriNetUnfolderBase]: For 8507/9083 co-relation queries the response was YES. [2024-10-14 19:53:36,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63940 conditions, 28999 events. 19240/28999 cut-off events. For 8507/9083 co-relation queries the response was YES. Maximal size of possible extension queue 1205. Compared 196730 event pairs, 14898 based on Foata normal form. 112/20693 useless extension candidates. Maximal degree in co-relation 63777. Up to 24110 conditions per place. [2024-10-14 19:53:36,183 INFO L140 encePairwiseOnDemand]: 82/88 looper letters, 234 selfloop transitions, 3 changer transitions 0/259 dead transitions. [2024-10-14 19:53:36,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 259 transitions, 1628 flow [2024-10-14 19:53:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:53:36,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:53:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 199 transitions. [2024-10-14 19:53:36,185 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-10-14 19:53:36,185 INFO L175 Difference]: Start difference. First operand has 107 places, 168 transitions, 766 flow. Second operand 4 states and 199 transitions. [2024-10-14 19:53:36,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 259 transitions, 1628 flow [2024-10-14 19:53:36,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 259 transitions, 1620 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:53:36,209 INFO L231 Difference]: Finished difference. Result has 109 places, 168 transitions, 771 flow [2024-10-14 19:53:36,209 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=771, PETRI_PLACES=109, PETRI_TRANSITIONS=168} [2024-10-14 19:53:36,210 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, 32 predicate places. [2024-10-14 19:53:36,210 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 168 transitions, 771 flow [2024-10-14 19:53:36,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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 19:53:36,210 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:36,210 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:36,214 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 19:53:36,411 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 19:53:36,411 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:53:36,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:36,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1440650529, now seen corresponding path program 1 times [2024-10-14 19:53:36,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:36,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916837832] [2024-10-14 19:53:36,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:36,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:36,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:36,413 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 19:53:36,414 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 19:53:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:36,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:53:36,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:36,491 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 19:53:36,491 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:36,491 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:36,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916837832] [2024-10-14 19:53:36,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916837832] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:36,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:36,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:53:36,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081245726] [2024-10-14 19:53:36,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:36,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:53:36,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:36,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:53:36,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:53:36,500 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-10-14 19:53:36,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 168 transitions, 771 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:36,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:36,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-10-14 19:53:36,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:39,266 INFO L124 PetriNetUnfolderBase]: 33260/48151 cut-off events. [2024-10-14 19:53:39,266 INFO L125 PetriNetUnfolderBase]: For 11910/12966 co-relation queries the response was YES. [2024-10-14 19:53:39,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107675 conditions, 48151 events. 33260/48151 cut-off events. For 11910/12966 co-relation queries the response was YES. Maximal size of possible extension queue 1862. Compared 320738 event pairs, 19612 based on Foata normal form. 0/34234 useless extension candidates. Maximal degree in co-relation 107511. Up to 22616 conditions per place. [2024-10-14 19:53:39,745 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 179 selfloop transitions, 5 changer transitions 0/203 dead transitions. [2024-10-14 19:53:39,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 203 transitions, 1242 flow [2024-10-14 19:53:39,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:53:39,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:53:39,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2024-10-14 19:53:39,747 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6212121212121212 [2024-10-14 19:53:39,747 INFO L175 Difference]: Start difference. First operand has 109 places, 168 transitions, 771 flow. Second operand 3 states and 164 transitions. [2024-10-14 19:53:39,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 203 transitions, 1242 flow [2024-10-14 19:53:39,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 203 transitions, 1238 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 19:53:39,764 INFO L231 Difference]: Finished difference. Result has 112 places, 169 transitions, 793 flow [2024-10-14 19:53:39,764 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=793, PETRI_PLACES=112, PETRI_TRANSITIONS=169} [2024-10-14 19:53:39,765 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, 35 predicate places. [2024-10-14 19:53:39,765 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 169 transitions, 793 flow [2024-10-14 19:53:39,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:39,765 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:39,765 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:39,769 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 19:53:39,966 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 19:53:39,966 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:53:39,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:39,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1457790317, now seen corresponding path program 1 times [2024-10-14 19:53:39,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:39,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1939129340] [2024-10-14 19:53:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:39,967 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 19:53:39,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:39,968 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 19:53:39,969 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 19:53:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:40,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 19:53:40,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:40,067 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 19:53:40,079 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 19:53:40,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:53:40,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 19:53:40,235 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-14 19:53:40,235 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 19:53:40,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:53:40,300 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 19:53:40,313 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:53:40,313 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 19:53:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:40,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:53:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:44,391 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:44,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1939129340] [2024-10-14 19:53:44,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1939129340] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:53:44,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:53:44,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-14 19:53:44,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413335386] [2024-10-14 19:53:44,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:53:44,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 19:53:44,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:44,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 19:53:44,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-14 19:53:45,627 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 88 [2024-10-14 19:53:45,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 169 transitions, 793 flow. Second operand has 12 states, 12 states have (on average 23.333333333333332) internal successors, (280), 12 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 19:53:45,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:45,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 88 [2024-10-14 19:53:45,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:48,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 19:53:57,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 19:54:11,306 INFO L124 PetriNetUnfolderBase]: 59074/90495 cut-off events. [2024-10-14 19:54:11,307 INFO L125 PetriNetUnfolderBase]: For 37720/41227 co-relation queries the response was YES. [2024-10-14 19:54:11,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203347 conditions, 90495 events. 59074/90495 cut-off events. For 37720/41227 co-relation queries the response was YES. Maximal size of possible extension queue 2770. Compared 722000 event pairs, 47176 based on Foata normal form. 2690/70528 useless extension candidates. Maximal degree in co-relation 203057. Up to 35032 conditions per place. [2024-10-14 19:54:12,219 INFO L140 encePairwiseOnDemand]: 70/88 looper letters, 197 selfloop transitions, 169 changer transitions 0/386 dead transitions. [2024-10-14 19:54:12,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 386 transitions, 2546 flow [2024-10-14 19:54:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 19:54:12,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 19:54:12,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 479 transitions. [2024-10-14 19:54:12,222 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3887987012987013 [2024-10-14 19:54:12,222 INFO L175 Difference]: Start difference. First operand has 112 places, 169 transitions, 793 flow. Second operand 14 states and 479 transitions. [2024-10-14 19:54:12,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 386 transitions, 2546 flow [2024-10-14 19:54:12,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 386 transitions, 2524 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:54:12,259 INFO L231 Difference]: Finished difference. Result has 130 places, 272 transitions, 1967 flow [2024-10-14 19:54:12,260 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1967, PETRI_PLACES=130, PETRI_TRANSITIONS=272} [2024-10-14 19:54:12,261 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, 53 predicate places. [2024-10-14 19:54:12,263 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 272 transitions, 1967 flow [2024-10-14 19:54:12,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.333333333333332) internal successors, (280), 12 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 19:54:12,263 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:12,263 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:54:12,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2024-10-14 19:54:12,464 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 19:54:12,464 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:54:12,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:12,465 INFO L85 PathProgramCache]: Analyzing trace with hash -849768880, now seen corresponding path program 1 times [2024-10-14 19:54:12,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:12,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186095762] [2024-10-14 19:54:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:54:12,465 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 19:54:12,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:12,467 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 19:54:12,468 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 19:54:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:54:12,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:54:12,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 19:54:12,576 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:54:12,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:12,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186095762] [2024-10-14 19:54:12,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186095762] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:54:12,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:54:12,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:54:12,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370269210] [2024-10-14 19:54:12,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:54:12,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:54:12,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:12,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:54:12,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:54:12,578 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-10-14 19:54:12,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 272 transitions, 1967 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 19:54:12,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:12,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-10-14 19:54:12,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand