./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-more-buffer-series2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:55:41,202 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:55:41,276 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:55:41,282 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:55:41,282 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:55:41,316 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:55:41,317 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:55:41,318 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:55:41,319 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:55:41,320 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:55:41,320 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:55:41,321 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:55:41,321 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:55:41,322 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:55:41,323 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:55:41,324 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:55:41,324 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:55:41,325 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:55:41,325 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:55:41,325 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:55:41,326 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:55:41,329 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:55:41,330 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:55:41,330 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:55:41,331 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:55:41,331 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:55:41,331 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:55:41,331 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:55:41,332 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:55:41,332 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:55:41,332 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:55:41,332 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:55:41,333 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:55:41,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:55:41,333 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:55:41,333 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:55:41,334 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:55:41,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:55:41,334 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:55:41,334 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:55:41,334 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:55:41,336 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:55:41,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 [2024-10-14 19:55:41,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:55:41,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:55:41,631 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:55:41,632 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:55:41,632 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:55:41,634 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2024-10-14 19:55:43,144 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:55:43,371 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:55:43,372 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2024-10-14 19:55:43,382 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be4006def/5b0340e79f0646ba86f7654592462af9/FLAG9763f6479 [2024-10-14 19:55:43,394 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be4006def/5b0340e79f0646ba86f7654592462af9 [2024-10-14 19:55:43,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:55:43,398 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:55:43,399 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:55:43,400 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:55:43,404 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:55:43,405 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:55:43" (1/1) ... [2024-10-14 19:55:43,405 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bc2420d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:43, skipping insertion in model container [2024-10-14 19:55:43,405 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:55:43" (1/1) ... [2024-10-14 19:55:43,428 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:55:43,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:55:43,654 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 19:55:43,654 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1cea8a16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:43, skipping insertion in model container [2024-10-14 19:55:43,654 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:55:43,655 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-14 19:55:43,656 INFO L158 Benchmark]: Toolchain (without parser) took 257.45ms. Allocated memory is still 151.0MB. Free memory was 83.1MB in the beginning and 71.7MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-14 19:55:43,657 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 113.2MB. Free memory is still 74.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 19:55:43,658 INFO L158 Benchmark]: CACSL2BoogieTranslator took 255.31ms. Allocated memory is still 151.0MB. Free memory was 82.9MB in the beginning and 71.7MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-14 19:55:43,659 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 113.2MB. Free memory is still 74.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 255.31ms. Allocated memory is still 151.0MB. Free memory was 82.9MB in the beginning and 71.7MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 160]: 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-more-buffer-series2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:55:45,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:55:45,822 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-14 19:55:45,830 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:55:45,831 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:55:45,867 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:55:45,869 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:55:45,869 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:55:45,870 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:55:45,871 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:55:45,872 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:55:45,872 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:55:45,872 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:55:45,873 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:55:45,875 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:55:45,875 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:55:45,875 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:55:45,876 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:55:45,876 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:55:45,876 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:55:45,876 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:55:45,881 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:55:45,881 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:55:45,881 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:55:45,881 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:55:45,881 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-14 19:55:45,882 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:55:45,882 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-14 19:55:45,882 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:55:45,882 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:55:45,882 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:55:45,883 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:55:45,883 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:55:45,883 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:55:45,883 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:55:45,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:55:45,884 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:55:45,886 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:55:45,886 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-14 19:55:45,887 INFO L153 SettingsManager]: * Command for external solver=cvc5 --incremental --print-success --lang smt [2024-10-14 19:55:45,887 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:55:45,887 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:55:45,887 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:55:45,887 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:55:45,888 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-14 19:55:45,888 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 [2024-10-14 19:55:46,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:55:46,250 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:55:46,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:55:46,255 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:55:46,255 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:55:46,258 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2024-10-14 19:55:47,998 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:55:48,228 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:55:48,229 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2024-10-14 19:55:48,242 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cea0cc906/9779352250bd4f67b5d2e9130f74c6aa/FLAG411a6fa72 [2024-10-14 19:55:48,261 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cea0cc906/9779352250bd4f67b5d2e9130f74c6aa [2024-10-14 19:55:48,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:55:48,265 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:55:48,269 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:55:48,269 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:55:48,274 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:55:48,275 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:55:48" (1/1) ... [2024-10-14 19:55:48,276 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e591823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:48, skipping insertion in model container [2024-10-14 19:55:48,276 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:55:48" (1/1) ... [2024-10-14 19:55:48,314 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:55:48,557 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:55:48,578 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-14 19:55:48,584 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:55:48,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:55:48,626 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:55:48,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:55:48,678 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:55:48,679 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:48 WrapperNode [2024-10-14 19:55:48,679 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:55:48,680 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:55:48,680 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:55:48,681 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:55:48,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:48" (1/1) ... [2024-10-14 19:55:48,701 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:48" (1/1) ... [2024-10-14 19:55:48,747 INFO L138 Inliner]: procedures = 28, calls = 64, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 328 [2024-10-14 19:55:48,750 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:55:48,751 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:55:48,751 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:55:48,752 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:55:48,762 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:48" (1/1) ... [2024-10-14 19:55:48,762 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:48" (1/1) ... [2024-10-14 19:55:48,771 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:48" (1/1) ... [2024-10-14 19:55:48,803 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-10-14 19:55:48,807 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:48" (1/1) ... [2024-10-14 19:55:48,807 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:48" (1/1) ... [2024-10-14 19:55:48,824 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:48" (1/1) ... [2024-10-14 19:55:48,829 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:48" (1/1) ... [2024-10-14 19:55:48,831 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:48" (1/1) ... [2024-10-14 19:55:48,833 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:48" (1/1) ... [2024-10-14 19:55:48,844 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:55:48,845 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:55:48,846 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:55:48,846 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:55:48,847 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:48" (1/1) ... [2024-10-14 19:55:48,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:55:48,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:55:48,875 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 19:55:48,878 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 19:55:48,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:55:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-14 19:55:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-14 19:55:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-14 19:55:48,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-14 19:55:48,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 19:55:48,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 19:55:48,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 19:55:48,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 19:55:48,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-14 19:55:48,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-14 19:55:48,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-14 19:55:48,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-14 19:55:48,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 19:55:48,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 19:55:48,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 19:55:48,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:55:48,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:55:48,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-14 19:55:48,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-14 19:55:48,928 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 19:55:49,098 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:55:49,101 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:55:49,853 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:55:49,854 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:55:50,371 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:55:50,372 INFO L314 CfgBuilder]: Removed 7 assume(true) statements. [2024-10-14 19:55:50,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:55:50 BoogieIcfgContainer [2024-10-14 19:55:50,373 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:55:50,375 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:55:50,375 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:55:50,378 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:55:50,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:55:48" (1/3) ... [2024-10-14 19:55:50,379 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@452fd39f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:55:50, skipping insertion in model container [2024-10-14 19:55:50,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:48" (2/3) ... [2024-10-14 19:55:50,379 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@452fd39f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:55:50, skipping insertion in model container [2024-10-14 19:55:50,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:55:50" (3/3) ... [2024-10-14 19:55:50,382 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2024-10-14 19:55:50,401 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:55:50,401 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-10-14 19:55:50,402 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:55:50,486 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-14 19:55:50,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 75 transitions, 178 flow [2024-10-14 19:55:50,567 INFO L124 PetriNetUnfolderBase]: 7/71 cut-off events. [2024-10-14 19:55:50,567 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-14 19:55:50,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 71 events. 7/71 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 189 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2024-10-14 19:55:50,573 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 75 transitions, 178 flow [2024-10-14 19:55:50,576 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 70 transitions, 164 flow [2024-10-14 19:55:50,585 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:55:50,593 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;@6f7aa654, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:55:50,593 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-10-14 19:55:50,597 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:55:50,597 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-14 19:55:50,597 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:55:50,598 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:55:50,598 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:55:50,599 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:55:50,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:55:50,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1021345, now seen corresponding path program 1 times [2024-10-14 19:55:50,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:55:50,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967988766] [2024-10-14 19:55:50,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:55:50,613 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 19:55:50,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:55:50,614 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 19:55:50,615 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 19:55:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:55:50,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:55:50,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:55:50,804 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 19:55:50,821 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 19:55:50,821 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:55:50,822 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:55:50,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967988766] [2024-10-14 19:55:50,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967988766] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:55:50,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:55:50,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:55:50,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643031920] [2024-10-14 19:55:50,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:55:50,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:55:50,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:55:50,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:55:50,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:55:50,918 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-10-14 19:55:50,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 19:55:50,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:55:50,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-10-14 19:55:50,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:55:53,342 INFO L124 PetriNetUnfolderBase]: 9087/13263 cut-off events. [2024-10-14 19:55:53,342 INFO L125 PetriNetUnfolderBase]: For 206/206 co-relation queries the response was YES. [2024-10-14 19:55:53,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26130 conditions, 13263 events. 9087/13263 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104348 event pairs, 8782 based on Foata normal form. 1/6529 useless extension candidates. Maximal degree in co-relation 24528. Up to 12043 conditions per place. [2024-10-14 19:55:53,495 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 41 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-10-14 19:55:53,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 63 transitions, 236 flow [2024-10-14 19:55:53,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:55:53,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:55:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-10-14 19:55:53,506 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5511111111111111 [2024-10-14 19:55:53,508 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 164 flow. Second operand 3 states and 124 transitions. [2024-10-14 19:55:53,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 63 transitions, 236 flow [2024-10-14 19:55:53,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 220 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-14 19:55:53,588 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 138 flow [2024-10-14 19:55:53,590 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-10-14 19:55:53,593 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, -13 predicate places. [2024-10-14 19:55:53,594 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 138 flow [2024-10-14 19:55:53,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 19:55:53,594 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:55:53,595 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:55:53,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2024-10-14 19:55:53,795 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 19:55:53,796 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:55:53,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:55:53,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1021346, now seen corresponding path program 1 times [2024-10-14 19:55:53,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:55:53,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746677078] [2024-10-14 19:55:53,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:55:53,798 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 19:55:53,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:55:53,802 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 19:55:53,803 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 19:55:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:55:53,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:55:53,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:55:53,918 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 19:55:53,999 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 19:55:54,000 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:55:54,000 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:55:54,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746677078] [2024-10-14 19:55:54,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746677078] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:55:54,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:55:54,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:55:54,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639783115] [2024-10-14 19:55:54,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:55:54,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:55:54,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:55:54,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:55:54,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:55:54,026 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-10-14 19:55:54,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:55:54,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:55:54,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-10-14 19:55:54,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:55:56,142 INFO L124 PetriNetUnfolderBase]: 9090/13272 cut-off events. [2024-10-14 19:55:56,143 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:55:56,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25643 conditions, 13272 events. 9090/13272 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104213 event pairs, 8782 based on Foata normal form. 0/6533 useless extension candidates. Maximal degree in co-relation 25593. Up to 12056 conditions per place. [2024-10-14 19:55:56,237 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 45 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-10-14 19:55:56,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 72 transitions, 268 flow [2024-10-14 19:55:56,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:55:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:55:56,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2024-10-14 19:55:56,240 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2024-10-14 19:55:56,241 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 138 flow. Second operand 4 states and 158 transitions. [2024-10-14 19:55:56,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 72 transitions, 268 flow [2024-10-14 19:55:56,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:55:56,243 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 216 flow [2024-10-14 19:55:56,244 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2024-10-14 19:55:56,244 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, -9 predicate places. [2024-10-14 19:55:56,245 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 216 flow [2024-10-14 19:55:56,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:55:56,245 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:55:56,245 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-14 19:55:56,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-10-14 19:55:56,448 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 19:55:56,448 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:55:56,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:55:56,449 INFO L85 PathProgramCache]: Analyzing trace with hash 981546944, now seen corresponding path program 1 times [2024-10-14 19:55:56,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:55:56,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720017435] [2024-10-14 19:55:56,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:55:56,450 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 19:55:56,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:55:56,452 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 19:55:56,453 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 19:55:56,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:55:56,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 19:55:56,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:55:56,524 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 19:55:56,695 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 19:55:56,695 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:55:56,963 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 19:55:56,964 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:55:56,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720017435] [2024-10-14 19:55:56,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720017435] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:55:56,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:55:56,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:55:56,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985844195] [2024-10-14 19:55:56,965 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:55:56,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:55:56,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:55:56,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:55:56,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:55:57,172 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-10-14 19:55:57,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 216 flow. Second operand has 10 states, 10 states have (on average 26.0) internal successors, (260), 10 states have internal predecessors, (260), 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 19:55:57,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:55:57,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-10-14 19:55:57,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:55:59,874 INFO L124 PetriNetUnfolderBase]: 9099/13299 cut-off events. [2024-10-14 19:55:59,874 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-14 19:55:59,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25761 conditions, 13299 events. 9099/13299 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104385 event pairs, 8782 based on Foata normal form. 0/6560 useless extension candidates. Maximal degree in co-relation 25607. Up to 12059 conditions per place. [2024-10-14 19:55:59,967 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 45 selfloop transitions, 37 changer transitions 0/99 dead transitions. [2024-10-14 19:55:59,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 99 transitions, 500 flow [2024-10-14 19:55:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 19:55:59,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 19:55:59,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 341 transitions. [2024-10-14 19:55:59,974 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45466666666666666 [2024-10-14 19:55:59,974 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 216 flow. Second operand 10 states and 341 transitions. [2024-10-14 19:55:59,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 99 transitions, 500 flow [2024-10-14 19:55:59,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 500 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:55:59,979 INFO L231 Difference]: Finished difference. Result has 79 places, 99 transitions, 460 flow [2024-10-14 19:55:59,980 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=460, PETRI_PLACES=79, PETRI_TRANSITIONS=99} [2024-10-14 19:55:59,980 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2024-10-14 19:55:59,980 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 99 transitions, 460 flow [2024-10-14 19:55:59,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.0) internal successors, (260), 10 states have internal predecessors, (260), 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 19:55:59,981 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:55:59,982 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:55:59,985 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 19:56:00,182 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 19:56:00,183 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:56:00,183 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:00,184 INFO L85 PathProgramCache]: Analyzing trace with hash -570474938, now seen corresponding path program 1 times [2024-10-14 19:56:00,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:00,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046171582] [2024-10-14 19:56:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:56:00,185 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 19:56:00,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:00,188 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 19:56:00,189 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 19:56:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:56:00,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 19:56:00,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:00,338 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 19:56:00,339 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:56:00,339 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:00,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046171582] [2024-10-14 19:56:00,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046171582] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:56:00,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:56:00,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:56:00,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910078105] [2024-10-14 19:56:00,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:56:00,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:56:00,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:00,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:56:00,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:56:00,365 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2024-10-14 19:56:00,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 99 transitions, 460 flow. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 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 19:56:00,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:00,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2024-10-14 19:56:00,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:02,181 INFO L124 PetriNetUnfolderBase]: 10055/14869 cut-off events. [2024-10-14 19:56:02,181 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-10-14 19:56:02,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28923 conditions, 14869 events. 10055/14869 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 1567. Compared 119514 event pairs, 9699 based on Foata normal form. 348/8106 useless extension candidates. Maximal degree in co-relation 28781. Up to 12085 conditions per place. [2024-10-14 19:56:02,312 INFO L140 encePairwiseOnDemand]: 64/75 looper letters, 131 selfloop transitions, 3 changer transitions 0/154 dead transitions. [2024-10-14 19:56:02,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 154 transitions, 994 flow [2024-10-14 19:56:02,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:56:02,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:56:02,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 197 transitions. [2024-10-14 19:56:02,314 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6566666666666666 [2024-10-14 19:56:02,314 INFO L175 Difference]: Start difference. First operand has 79 places, 99 transitions, 460 flow. Second operand 4 states and 197 transitions. [2024-10-14 19:56:02,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 154 transitions, 994 flow [2024-10-14 19:56:02,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 154 transitions, 838 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-10-14 19:56:02,321 INFO L231 Difference]: Finished difference. Result has 79 places, 99 transitions, 388 flow [2024-10-14 19:56:02,321 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=388, PETRI_PLACES=79, PETRI_TRANSITIONS=99} [2024-10-14 19:56:02,322 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2024-10-14 19:56:02,322 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 99 transitions, 388 flow [2024-10-14 19:56:02,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 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 19:56:02,323 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:02,323 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:56:02,327 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 19:56:02,525 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 19:56:02,526 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:56:02,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:02,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1540730396, now seen corresponding path program 1 times [2024-10-14 19:56:02,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:02,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917358536] [2024-10-14 19:56:02,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:56:02,529 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 19:56:02,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:02,531 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 19:56:02,532 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 19:56:02,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:56:02,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 19:56:02,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:56:02,734 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:56:02,734 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:02,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917358536] [2024-10-14 19:56:02,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917358536] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:56:02,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:56:02,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 19:56:02,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805559400] [2024-10-14 19:56:02,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:56:02,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 19:56:02,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:02,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 19:56:02,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 19:56:02,834 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-10-14 19:56:02,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 99 transitions, 388 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 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 19:56:02,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:02,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-10-14 19:56:02,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:07,562 INFO L124 PetriNetUnfolderBase]: 31457/43506 cut-off events. [2024-10-14 19:56:07,562 INFO L125 PetriNetUnfolderBase]: For 2195/3175 co-relation queries the response was YES. [2024-10-14 19:56:07,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96267 conditions, 43506 events. 31457/43506 cut-off events. For 2195/3175 co-relation queries the response was YES. Maximal size of possible extension queue 3682. Compared 331914 event pairs, 13338 based on Foata normal form. 0/23318 useless extension candidates. Maximal degree in co-relation 96145. Up to 13189 conditions per place. [2024-10-14 19:56:07,992 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 195 selfloop transitions, 12 changer transitions 0/224 dead transitions. [2024-10-14 19:56:07,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 224 transitions, 1116 flow [2024-10-14 19:56:07,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 19:56:07,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-14 19:56:07,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 375 transitions. [2024-10-14 19:56:07,994 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-14 19:56:07,994 INFO L175 Difference]: Start difference. First operand has 79 places, 99 transitions, 388 flow. Second operand 8 states and 375 transitions. [2024-10-14 19:56:07,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 224 transitions, 1116 flow [2024-10-14 19:56:08,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 224 transitions, 1112 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 19:56:08,006 INFO L231 Difference]: Finished difference. Result has 88 places, 103 transitions, 438 flow [2024-10-14 19:56:08,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=438, PETRI_PLACES=88, PETRI_TRANSITIONS=103} [2024-10-14 19:56:08,007 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, 12 predicate places. [2024-10-14 19:56:08,007 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 103 transitions, 438 flow [2024-10-14 19:56:08,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 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 19:56:08,007 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:08,008 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-14 19:56:08,013 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 19:56:08,208 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 19:56:08,208 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:56:08,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:08,209 INFO L85 PathProgramCache]: Analyzing trace with hash -340442854, now seen corresponding path program 2 times [2024-10-14 19:56:08,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:08,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868727866] [2024-10-14 19:56:08,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:56:08,210 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 19:56:08,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:08,214 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 19:56:08,216 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 19:56:08,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:56:08,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:56:08,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 19:56:08,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:08,324 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 19:56:08,625 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 19:56:08,626 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:56:09,238 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 19:56:09,239 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:09,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868727866] [2024-10-14 19:56:09,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868727866] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:56:09,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:56:09,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:56:09,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997639349] [2024-10-14 19:56:09,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:56:09,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:56:09,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:09,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:56:09,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:56:09,639 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-10-14 19:56:09,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 103 transitions, 438 flow. Second operand has 14 states, 14 states have (on average 26.571428571428573) internal successors, (372), 14 states have internal predecessors, (372), 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 19:56:09,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:09,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-10-14 19:56:09,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:27,375 INFO L124 PetriNetUnfolderBase]: 21022/30863 cut-off events. [2024-10-14 19:56:27,375 INFO L125 PetriNetUnfolderBase]: For 6555/6555 co-relation queries the response was YES. [2024-10-14 19:56:27,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71866 conditions, 30863 events. 21022/30863 cut-off events. For 6555/6555 co-relation queries the response was YES. Maximal size of possible extension queue 2768. Compared 260272 event pairs, 19872 based on Foata normal form. 30/16908 useless extension candidates. Maximal degree in co-relation 71390. Up to 27986 conditions per place. [2024-10-14 19:56:27,631 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 48 selfloop transitions, 91 changer transitions 0/157 dead transitions. [2024-10-14 19:56:27,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 157 transitions, 998 flow [2024-10-14 19:56:27,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 19:56:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-14 19:56:27,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 704 transitions. [2024-10-14 19:56:27,635 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2024-10-14 19:56:27,635 INFO L175 Difference]: Start difference. First operand has 88 places, 103 transitions, 438 flow. Second operand 22 states and 704 transitions. [2024-10-14 19:56:27,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 157 transitions, 998 flow [2024-10-14 19:56:27,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 157 transitions, 998 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:56:27,649 INFO L231 Difference]: Finished difference. Result has 115 places, 157 transitions, 988 flow [2024-10-14 19:56:27,650 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=988, PETRI_PLACES=115, PETRI_TRANSITIONS=157} [2024-10-14 19:56:27,651 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, 39 predicate places. [2024-10-14 19:56:27,651 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 157 transitions, 988 flow [2024-10-14 19:56:27,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 26.571428571428573) internal successors, (372), 14 states have internal predecessors, (372), 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 19:56:27,652 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:27,652 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:56:27,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-14 19:56:27,852 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 19:56:27,853 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:56:27,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:27,853 INFO L85 PathProgramCache]: Analyzing trace with hash -204696368, now seen corresponding path program 1 times [2024-10-14 19:56:27,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:27,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148008852] [2024-10-14 19:56:27,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:56:27,854 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 19:56:27,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:27,855 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 19:56:27,857 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 19:56:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:56:27,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 19:56:27,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:27,938 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 19:56:27,970 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 19:56:27,970 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:56:27,971 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:27,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148008852] [2024-10-14 19:56:27,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1148008852] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:56:27,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:56:27,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:56:27,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589014715] [2024-10-14 19:56:27,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:56:27,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:56:27,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:27,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:56:27,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:56:28,022 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-10-14 19:56:28,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 157 transitions, 988 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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 19:56:28,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:28,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-10-14 19:56:28,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:30,548 INFO L124 PetriNetUnfolderBase]: 15707/23223 cut-off events. [2024-10-14 19:56:30,548 INFO L125 PetriNetUnfolderBase]: For 5537/5537 co-relation queries the response was YES. [2024-10-14 19:56:30,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54456 conditions, 23223 events. 15707/23223 cut-off events. For 5537/5537 co-relation queries the response was YES. Maximal size of possible extension queue 2022. Compared 190881 event pairs, 14785 based on Foata normal form. 0/13517 useless extension candidates. Maximal degree in co-relation 54260. Up to 21001 conditions per place. [2024-10-14 19:56:30,765 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 122 selfloop transitions, 12 changer transitions 0/155 dead transitions. [2024-10-14 19:56:30,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 155 transitions, 1250 flow [2024-10-14 19:56:30,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:56:30,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:56:30,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 143 transitions. [2024-10-14 19:56:30,766 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-10-14 19:56:30,766 INFO L175 Difference]: Start difference. First operand has 115 places, 157 transitions, 988 flow. Second operand 4 states and 143 transitions. [2024-10-14 19:56:30,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 155 transitions, 1250 flow [2024-10-14 19:56:30,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 155 transitions, 1018 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-10-14 19:56:30,777 INFO L231 Difference]: Finished difference. Result has 107 places, 155 transitions, 774 flow [2024-10-14 19:56:30,777 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=774, PETRI_PLACES=107, PETRI_TRANSITIONS=155} [2024-10-14 19:56:30,778 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, 31 predicate places. [2024-10-14 19:56:30,778 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 155 transitions, 774 flow [2024-10-14 19:56:30,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 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 19:56:30,778 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:30,779 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:56:30,784 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 19:56:30,979 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 19:56:30,980 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:56:30,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:30,980 INFO L85 PathProgramCache]: Analyzing trace with hash -204696367, now seen corresponding path program 1 times [2024-10-14 19:56:30,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:30,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228654474] [2024-10-14 19:56:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:56:30,981 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 19:56:30,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:30,982 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 19:56:30,983 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 19:56:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:56:31,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-14 19:56:31,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:31,083 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 19:56:31,350 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 19:56:31,351 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:56:31,351 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:31,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228654474] [2024-10-14 19:56:31,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228654474] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:56:31,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:56:31,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 19:56:31,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458186283] [2024-10-14 19:56:31,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:56:31,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 19:56:31,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:31,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 19:56:31,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-14 19:56:31,595 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-10-14 19:56:31,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 155 transitions, 774 flow. Second operand has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 states have internal predecessors, (185), 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 19:56:31,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:31,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-10-14 19:56:31,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:38,297 INFO L124 PetriNetUnfolderBase]: 48312/62859 cut-off events. [2024-10-14 19:56:38,297 INFO L125 PetriNetUnfolderBase]: For 14066/14066 co-relation queries the response was YES. [2024-10-14 19:56:38,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150184 conditions, 62859 events. 48312/62859 cut-off events. For 14066/14066 co-relation queries the response was YES. Maximal size of possible extension queue 4076. Compared 402752 event pairs, 4714 based on Foata normal form. 0/37592 useless extension candidates. Maximal degree in co-relation 150016. Up to 35346 conditions per place. [2024-10-14 19:56:38,814 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 206 selfloop transitions, 29 changer transitions 0/253 dead transitions. [2024-10-14 19:56:38,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 253 transitions, 1549 flow [2024-10-14 19:56:38,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 19:56:38,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-14 19:56:38,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 339 transitions. [2024-10-14 19:56:38,816 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-10-14 19:56:38,816 INFO L175 Difference]: Start difference. First operand has 107 places, 155 transitions, 774 flow. Second operand 8 states and 339 transitions. [2024-10-14 19:56:38,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 253 transitions, 1549 flow [2024-10-14 19:56:38,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 253 transitions, 1536 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:56:38,835 INFO L231 Difference]: Finished difference. Result has 115 places, 160 transitions, 871 flow [2024-10-14 19:56:38,835 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=871, PETRI_PLACES=115, PETRI_TRANSITIONS=160} [2024-10-14 19:56:38,836 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, 39 predicate places. [2024-10-14 19:56:38,836 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 160 transitions, 871 flow [2024-10-14 19:56:38,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 states have internal predecessors, (185), 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 19:56:38,836 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:38,837 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:56:38,840 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 19:56:39,037 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 19:56:39,037 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:56:39,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:39,038 INFO L85 PathProgramCache]: Analyzing trace with hash -204696366, now seen corresponding path program 1 times [2024-10-14 19:56:39,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:39,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093042180] [2024-10-14 19:56:39,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:56:39,038 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 19:56:39,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:39,041 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 19:56:39,042 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 19:56:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:56:39,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 19:56:39,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:39,164 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 19:56:39,164 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:56:39,164 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:39,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093042180] [2024-10-14 19:56:39,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093042180] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:56:39,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:56:39,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:56:39,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808092718] [2024-10-14 19:56:39,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:56:39,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:56:39,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:39,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:56:39,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:56:39,188 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2024-10-14 19:56:39,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 160 transitions, 871 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 19:56:39,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:39,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2024-10-14 19:56:39,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:44,503 INFO L124 PetriNetUnfolderBase]: 29328/44282 cut-off events. [2024-10-14 19:56:44,503 INFO L125 PetriNetUnfolderBase]: For 20930/21870 co-relation queries the response was YES. [2024-10-14 19:56:44,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112171 conditions, 44282 events. 29328/44282 cut-off events. For 20930/21870 co-relation queries the response was YES. Maximal size of possible extension queue 3405. Compared 391177 event pairs, 26828 based on Foata normal form. 1990/31449 useless extension candidates. Maximal degree in co-relation 111936. Up to 36003 conditions per place. [2024-10-14 19:56:44,919 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 186 selfloop transitions, 13 changer transitions 0/222 dead transitions. [2024-10-14 19:56:44,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 222 transitions, 1592 flow [2024-10-14 19:56:44,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:56:44,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:56:44,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 189 transitions. [2024-10-14 19:56:44,920 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-10-14 19:56:44,920 INFO L175 Difference]: Start difference. First operand has 115 places, 160 transitions, 871 flow. Second operand 4 states and 189 transitions. [2024-10-14 19:56:44,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 222 transitions, 1592 flow [2024-10-14 19:56:44,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 222 transitions, 1545 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:56:44,951 INFO L231 Difference]: Finished difference. Result has 116 places, 160 transitions, 874 flow [2024-10-14 19:56:44,951 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=874, PETRI_PLACES=116, PETRI_TRANSITIONS=160} [2024-10-14 19:56:44,952 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, 40 predicate places. [2024-10-14 19:56:44,952 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 160 transitions, 874 flow [2024-10-14 19:56:44,952 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 19:56:44,953 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:44,953 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:56:44,959 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 19:56:45,153 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 19:56:45,154 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:56:45,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:45,154 INFO L85 PathProgramCache]: Analyzing trace with hash -291260555, now seen corresponding path program 1 times [2024-10-14 19:56:45,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:45,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891909818] [2024-10-14 19:56:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:56:45,154 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 19:56:45,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:45,156 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 19:56:45,157 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 19:56:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:56:45,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:56:45,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:45,266 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 19:56:45,304 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-14 19:56:45,304 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 19:56:45,338 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-14 19:56:45,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-10-14 19:56:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:56:45,365 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:56:45,365 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:45,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891909818] [2024-10-14 19:56:45,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891909818] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:56:45,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:56:45,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:56:45,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074846649] [2024-10-14 19:56:45,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:56:45,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:56:45,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:45,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:56:45,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:56:45,402 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-10-14 19:56:45,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 160 transitions, 874 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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 19:56:45,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:45,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-10-14 19:56:45,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand