./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-mult2.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-mult2.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 dbff9cba9b3794b18d55ca52c1abf6279404a7b220f91d79730a04b586f9ee44 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:55:15,828 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:55:15,875 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:55:15,879 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:55:15,881 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:55:15,902 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:55:15,903 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:55:15,903 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:55:15,903 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:55:15,903 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:55:15,904 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:55:15,904 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:55:15,905 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:55:15,907 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:55:15,907 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:55:15,908 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:55:15,908 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:55:15,908 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:55:15,908 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:55:15,908 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:55:15,909 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:55:15,910 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:55:15,910 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:55:15,910 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:55:15,910 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:55:15,910 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:55:15,911 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:55:15,911 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:55:15,911 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:55:15,911 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:55:15,911 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:55:15,912 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:55:15,912 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:55:15,912 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:55:15,912 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:55:15,913 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:55:15,913 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:55:15,913 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:55:15,914 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:55:15,914 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:55:15,914 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:55:15,914 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:55:15,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dbff9cba9b3794b18d55ca52c1abf6279404a7b220f91d79730a04b586f9ee44 [2024-10-14 19:55:16,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:55:16,140 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:55:16,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:55:16,142 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:55:16,143 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:55:16,143 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2024-10-14 19:55:17,341 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:55:17,481 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:55:17,482 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2024-10-14 19:55:17,488 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e26531ab3/7352be87fbb34f7ab7ff39c54be66e8d/FLAG60c50874c [2024-10-14 19:55:17,498 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e26531ab3/7352be87fbb34f7ab7ff39c54be66e8d [2024-10-14 19:55:17,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:55:17,501 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:55:17,502 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:55:17,502 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:55:17,506 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:55:17,507 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:55:17" (1/1) ... [2024-10-14 19:55:17,507 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2049c5a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:17, skipping insertion in model container [2024-10-14 19:55:17,507 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:55:17" (1/1) ... [2024-10-14 19:55:17,526 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:55:17,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:55:17,691 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 19:55:17,692 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3bf1d99a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:17, skipping insertion in model container [2024-10-14 19:55:17,692 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:55:17,692 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-14 19:55:17,694 INFO L158 Benchmark]: Toolchain (without parser) took 192.24ms. Allocated memory was 134.2MB in the beginning and 195.0MB in the end (delta: 60.8MB). Free memory was 62.5MB in the beginning and 163.1MB in the end (delta: -100.6MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. [2024-10-14 19:55:17,694 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 134.2MB. Free memory is still 86.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 19:55:17,695 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.63ms. Allocated memory was 134.2MB in the beginning and 195.0MB in the end (delta: 60.8MB). Free memory was 62.3MB in the beginning and 163.1MB in the end (delta: -100.8MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. [2024-10-14 19:55:17,696 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 134.2MB. Free memory is still 86.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 190.63ms. Allocated memory was 134.2MB in the beginning and 195.0MB in the end (delta: 60.8MB). Free memory was 62.3MB in the beginning and 163.1MB in the end (delta: -100.8MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 157]: 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-mult2.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 dbff9cba9b3794b18d55ca52c1abf6279404a7b220f91d79730a04b586f9ee44 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:55:19,247 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:55:19,313 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-14 19:55:19,323 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:55:19,323 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:55:19,346 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:55:19,347 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:55:19,347 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:55:19,348 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:55:19,348 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:55:19,348 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:55:19,349 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:55:19,349 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:55:19,349 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:55:19,349 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:55:19,350 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:55:19,350 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:55:19,350 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:55:19,351 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:55:19,351 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:55:19,351 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:55:19,351 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:55:19,352 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:55:19,352 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:55:19,352 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:55:19,352 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-14 19:55:19,352 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:55:19,353 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-14 19:55:19,353 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:55:19,353 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:55:19,353 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:55:19,353 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:55:19,354 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:55:19,354 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:55:19,354 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:55:19,354 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:55:19,355 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:55:19,355 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:55:19,355 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-14 19:55:19,359 INFO L153 SettingsManager]: * Command for external solver=cvc5 --incremental --print-success --lang smt [2024-10-14 19:55:19,359 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:55:19,359 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:55:19,359 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:55:19,360 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:55:19,360 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-14 19:55:19,360 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dbff9cba9b3794b18d55ca52c1abf6279404a7b220f91d79730a04b586f9ee44 [2024-10-14 19:55:19,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:55:19,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:55:19,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:55:19,643 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:55:19,645 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:55:19,646 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2024-10-14 19:55:20,811 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:55:20,949 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:55:20,949 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2024-10-14 19:55:20,955 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/853da89a1/03d66aa81bb742ca88e4f6e40b3cb92d/FLAGbbe292619 [2024-10-14 19:55:20,965 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/853da89a1/03d66aa81bb742ca88e4f6e40b3cb92d [2024-10-14 19:55:20,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:55:20,967 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:55:20,972 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:55:20,973 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:55:20,976 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:55:20,977 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:55:20" (1/1) ... [2024-10-14 19:55:20,977 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5398c599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:20, skipping insertion in model container [2024-10-14 19:55:20,977 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:55:20" (1/1) ... [2024-10-14 19:55:20,994 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:55:21,176 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:55:21,192 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-14 19:55:21,199 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:55:21,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:55:21,231 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:55:21,262 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:55:21,284 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:55:21,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:21 WrapperNode [2024-10-14 19:55:21,284 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:55:21,285 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:55:21,285 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:55:21,285 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:55:21,290 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:21" (1/1) ... [2024-10-14 19:55:21,303 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:21" (1/1) ... [2024-10-14 19:55:21,333 INFO L138 Inliner]: procedures = 28, calls = 57, calls flagged for inlining = 19, calls inlined = 23, statements flattened = 284 [2024-10-14 19:55:21,337 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:55:21,337 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:55:21,337 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:55:21,337 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:55:21,345 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:21" (1/1) ... [2024-10-14 19:55:21,346 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:21" (1/1) ... [2024-10-14 19:55:21,352 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:21" (1/1) ... [2024-10-14 19:55:21,369 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-14 19:55:21,370 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:21" (1/1) ... [2024-10-14 19:55:21,370 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:21" (1/1) ... [2024-10-14 19:55:21,376 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:21" (1/1) ... [2024-10-14 19:55:21,379 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:21" (1/1) ... [2024-10-14 19:55:21,380 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:21" (1/1) ... [2024-10-14 19:55:21,382 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:21" (1/1) ... [2024-10-14 19:55:21,384 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:55:21,384 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:55:21,385 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:55:21,385 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:55:21,385 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:21" (1/1) ... [2024-10-14 19:55:21,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:55:21,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:55:21,415 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 19:55:21,416 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 19:55:21,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:55:21,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-14 19:55:21,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-14 19:55:21,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-14 19:55:21,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-14 19:55:21,446 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 19:55:21,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 19:55:21,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 19:55:21,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 19:55:21,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-14 19:55:21,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-14 19:55:21,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-14 19:55:21,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-14 19:55:21,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 19:55:21,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 19:55:21,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 19:55:21,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:55:21,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:55:21,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-14 19:55:21,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-14 19:55:21,449 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 19:55:21,549 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:55:21,551 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:55:22,014 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:55:22,014 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:55:22,289 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:55:22,289 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-14 19:55:22,290 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:55:22 BoogieIcfgContainer [2024-10-14 19:55:22,290 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:55:22,291 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:55:22,291 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:55:22,294 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:55:22,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:55:20" (1/3) ... [2024-10-14 19:55:22,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd7a3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:55:22, skipping insertion in model container [2024-10-14 19:55:22,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:21" (2/3) ... [2024-10-14 19:55:22,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd7a3e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:55:22, skipping insertion in model container [2024-10-14 19:55:22,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:55:22" (3/3) ... [2024-10-14 19:55:22,296 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2024-10-14 19:55:22,308 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:55:22,308 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-10-14 19:55:22,308 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:55:22,367 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-14 19:55:22,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 64 transitions, 156 flow [2024-10-14 19:55:22,421 INFO L124 PetriNetUnfolderBase]: 6/60 cut-off events. [2024-10-14 19:55:22,421 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-14 19:55:22,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 60 events. 6/60 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 123 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-10-14 19:55:22,425 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 64 transitions, 156 flow [2024-10-14 19:55:22,427 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 59 transitions, 142 flow [2024-10-14 19:55:22,436 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:55:22,442 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;@4635963f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:55:22,442 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-10-14 19:55:22,447 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:55:22,447 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-14 19:55:22,447 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:55:22,447 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:55:22,448 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:55:22,448 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 19:55:22,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:55:22,453 INFO L85 PathProgramCache]: Analyzing trace with hash 833690, now seen corresponding path program 1 times [2024-10-14 19:55:22,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:55:22,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131524055] [2024-10-14 19:55:22,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:55:22,461 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 19:55:22,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:55:22,464 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 19:55:22,465 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 19:55:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:55:22,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:55:22,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:55:22,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:55:22,589 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 19:55:22,589 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:55:22,589 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:55:22,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131524055] [2024-10-14 19:55:22,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131524055] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:55:22,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:55:22,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:55:22,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898737678] [2024-10-14 19:55:22,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:55:22,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:55:22,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:55:22,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:55:22,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:55:22,638 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-10-14 19:55:22,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:55:22,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:55:22,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-10-14 19:55:22,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:55:23,472 INFO L124 PetriNetUnfolderBase]: 4566/6759 cut-off events. [2024-10-14 19:55:23,473 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-10-14 19:55:23,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13365 conditions, 6759 events. 4566/6759 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 49865 event pairs, 4408 based on Foata normal form. 1/3862 useless extension candidates. Maximal degree in co-relation 12180. Up to 6127 conditions per place. [2024-10-14 19:55:23,526 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 34 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-10-14 19:55:23,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 206 flow [2024-10-14 19:55:23,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:55:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:55:23,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-10-14 19:55:23,536 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-10-14 19:55:23,537 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 142 flow. Second operand 3 states and 111 transitions. [2024-10-14 19:55:23,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 206 flow [2024-10-14 19:55:23,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 190 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-14 19:55:23,551 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 122 flow [2024-10-14 19:55:23,552 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2024-10-14 19:55:23,555 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -10 predicate places. [2024-10-14 19:55:23,555 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 122 flow [2024-10-14 19:55:23,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:55:23,555 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:55:23,556 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:55:23,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-10-14 19:55:23,758 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 19:55:23,759 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 19:55:23,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:55:23,760 INFO L85 PathProgramCache]: Analyzing trace with hash 833691, now seen corresponding path program 1 times [2024-10-14 19:55:23,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:55:23,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481505744] [2024-10-14 19:55:23,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:55:23,761 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 19:55:23,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:55:23,763 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 19:55:23,764 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 19:55:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:55:23,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:55:23,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:55:23,856 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 19:55:23,934 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 19:55:23,934 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:55:23,935 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:55:23,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481505744] [2024-10-14 19:55:23,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481505744] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:55:23,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:55:23,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:55:23,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790971489] [2024-10-14 19:55:23,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:55:23,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:55:23,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:55:23,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:55:23,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:55:23,972 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-10-14 19:55:23,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:55:23,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:55:23,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-10-14 19:55:23,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:55:24,861 INFO L124 PetriNetUnfolderBase]: 4568/6765 cut-off events. [2024-10-14 19:55:24,861 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:55:24,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13067 conditions, 6765 events. 4568/6765 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 49862 event pairs, 4408 based on Foata normal form. 0/3865 useless extension candidates. Maximal degree in co-relation 13031. Up to 6136 conditions per place. [2024-10-14 19:55:24,905 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 37 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2024-10-14 19:55:24,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 61 transitions, 224 flow [2024-10-14 19:55:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:55:24,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:55:24,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 142 transitions. [2024-10-14 19:55:24,909 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5546875 [2024-10-14 19:55:24,910 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 122 flow. Second operand 4 states and 142 transitions. [2024-10-14 19:55:24,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 61 transitions, 224 flow [2024-10-14 19:55:24,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 61 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:55:24,913 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 174 flow [2024-10-14 19:55:24,914 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2024-10-14 19:55:24,914 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -6 predicate places. [2024-10-14 19:55:24,915 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 174 flow [2024-10-14 19:55:24,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:55:24,915 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:55:24,915 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-14 19:55:24,918 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 19:55:25,117 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 19:55:25,118 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 19:55:25,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:55:25,119 INFO L85 PathProgramCache]: Analyzing trace with hash 801203502, now seen corresponding path program 1 times [2024-10-14 19:55:25,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:55:25,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965943053] [2024-10-14 19:55:25,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:55:25,119 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 19:55:25,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:55:25,123 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 19:55:25,124 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 19:55:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:55:25,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 19:55:25,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:55:25,193 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 19:55:25,309 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 19:55:25,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:55:25,503 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 19:55:25,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:55:25,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965943053] [2024-10-14 19:55:25,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965943053] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:55:25,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:55:25,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:55:25,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598412976] [2024-10-14 19:55:25,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:55:25,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:55:25,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:55:25,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:55:25,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:55:25,562 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-10-14 19:55:25,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 174 flow. Second operand has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:55:25,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:55:25,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-10-14 19:55:25,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:55:26,952 INFO L124 PetriNetUnfolderBase]: 4574/6783 cut-off events. [2024-10-14 19:55:26,952 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-14 19:55:27,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13145 conditions, 6783 events. 4574/6783 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 49991 event pairs, 4408 based on Foata normal form. 0/3881 useless extension candidates. Maximal degree in co-relation 13042. Up to 6139 conditions per place. [2024-10-14 19:55:27,019 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 37 selfloop transitions, 25 changer transitions 0/79 dead transitions. [2024-10-14 19:55:27,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 79 transitions, 376 flow [2024-10-14 19:55:27,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 19:55:27,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 19:55:27,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 308 transitions. [2024-10-14 19:55:27,024 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-10-14 19:55:27,024 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 174 flow. Second operand 10 states and 308 transitions. [2024-10-14 19:55:27,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 79 transitions, 376 flow [2024-10-14 19:55:27,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 79 transitions, 376 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:55:27,026 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 336 flow [2024-10-14 19:55:27,027 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=336, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2024-10-14 19:55:27,027 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 6 predicate places. [2024-10-14 19:55:27,027 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 336 flow [2024-10-14 19:55:27,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:55:27,028 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:55:27,028 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:55:27,031 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 19:55:27,228 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 19:55:27,229 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 19:55:27,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:55:27,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1752571884, now seen corresponding path program 1 times [2024-10-14 19:55:27,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:55:27,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1493533845] [2024-10-14 19:55:27,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:55:27,230 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 19:55:27,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:55:27,231 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 19:55:27,232 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 19:55:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:55:27,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 19:55:27,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:55:27,326 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 19:55:27,326 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:55:27,326 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:55:27,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1493533845] [2024-10-14 19:55:27,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1493533845] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:55:27,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:55:27,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:55:27,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335159038] [2024-10-14 19:55:27,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:55:27,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:55:27,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:55:27,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:55:27,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:55:27,339 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-10-14 19:55:27,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 336 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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 19:55:27,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:55:27,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-10-14 19:55:27,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:55:28,195 INFO L124 PetriNetUnfolderBase]: 5243/7895 cut-off events. [2024-10-14 19:55:28,195 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-10-14 19:55:28,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15363 conditions, 7895 events. 5243/7895 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 59754 event pairs, 5051 based on Foata normal form. 259/4966 useless extension candidates. Maximal degree in co-relation 15275. Up to 6154 conditions per place. [2024-10-14 19:55:28,225 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 95 selfloop transitions, 3 changer transitions 0/117 dead transitions. [2024-10-14 19:55:28,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 117 transitions, 688 flow [2024-10-14 19:55:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:55:28,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:55:28,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 175 transitions. [2024-10-14 19:55:28,227 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68359375 [2024-10-14 19:55:28,227 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 336 flow. Second operand 4 states and 175 transitions. [2024-10-14 19:55:28,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 117 transitions, 688 flow [2024-10-14 19:55:28,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 117 transitions, 594 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-10-14 19:55:28,230 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 291 flow [2024-10-14 19:55:28,230 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=291, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2024-10-14 19:55:28,231 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 6 predicate places. [2024-10-14 19:55:28,231 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 291 flow [2024-10-14 19:55:28,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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 19:55:28,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:55:28,232 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:55:28,235 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 19:55:28,432 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 19:55:28,433 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 19:55:28,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:55:28,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1137220055, now seen corresponding path program 1 times [2024-10-14 19:55:28,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:55:28,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473816141] [2024-10-14 19:55:28,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:55:28,437 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 19:55:28,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:55:28,438 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 19:55:28,440 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 19:55:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:55:28,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 19:55:28,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:55:28,497 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 19:55:28,513 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 19:55:28,513 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:55:28,514 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:55:28,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473816141] [2024-10-14 19:55:28,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473816141] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:55:28,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:55:28,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:55:28,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206235885] [2024-10-14 19:55:28,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:55:28,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:55:28,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:55:28,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:55:28,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:55:28,527 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-10-14 19:55:28,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 291 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 19:55:28,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:55:28,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-10-14 19:55:28,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:55:29,000 INFO L124 PetriNetUnfolderBase]: 3409/5287 cut-off events. [2024-10-14 19:55:29,000 INFO L125 PetriNetUnfolderBase]: For 438/438 co-relation queries the response was YES. [2024-10-14 19:55:29,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11499 conditions, 5287 events. 3409/5287 cut-off events. For 438/438 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 39099 event pairs, 3251 based on Foata normal form. 0/3453 useless extension candidates. Maximal degree in co-relation 11423. Up to 4643 conditions per place. [2024-10-14 19:55:29,022 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 52 selfloop transitions, 6 changer transitions 0/77 dead transitions. [2024-10-14 19:55:29,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 77 transitions, 403 flow [2024-10-14 19:55:29,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:55:29,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:55:29,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-10-14 19:55:29,023 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-10-14 19:55:29,023 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 291 flow. Second operand 4 states and 132 transitions. [2024-10-14 19:55:29,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 77 transitions, 403 flow [2024-10-14 19:55:29,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 77 transitions, 399 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 19:55:29,026 INFO L231 Difference]: Finished difference. Result has 72 places, 77 transitions, 295 flow [2024-10-14 19:55:29,026 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=72, PETRI_TRANSITIONS=77} [2024-10-14 19:55:29,026 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 6 predicate places. [2024-10-14 19:55:29,027 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 77 transitions, 295 flow [2024-10-14 19:55:29,027 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 19:55:29,027 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:55:29,027 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:55:29,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-10-14 19:55:29,227 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 19:55:29,228 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 19:55:29,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:55:29,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1799809182, now seen corresponding path program 1 times [2024-10-14 19:55:29,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:55:29,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732406658] [2024-10-14 19:55:29,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:55:29,229 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 19:55:29,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:55:29,230 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 19:55:29,231 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 19:55:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:55:29,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 19:55:29,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:55:29,314 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 19:55:29,321 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 19:55:29,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:55:29,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 19:55:29,477 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:55:29,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-14 19:55:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:55:29,544 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:55:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:55:30,081 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:55:30,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732406658] [2024-10-14 19:55:30,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732406658] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:55:30,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:55:30,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:55:30,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431856668] [2024-10-14 19:55:30,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:55:30,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:55:30,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:55:30,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:55:30,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:55:30,280 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-10-14 19:55:30,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 77 transitions, 295 flow. Second operand has 10 states, 10 states have (on average 23.4) internal successors, (234), 10 states have internal predecessors, (234), 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 19:55:30,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:55:30,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-10-14 19:55:30,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:55:35,741 INFO L124 PetriNetUnfolderBase]: 7175/11121 cut-off events. [2024-10-14 19:55:35,741 INFO L125 PetriNetUnfolderBase]: For 1137/1137 co-relation queries the response was YES. [2024-10-14 19:55:35,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24125 conditions, 11121 events. 7175/11121 cut-off events. For 1137/1137 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 88914 event pairs, 6839 based on Foata normal form. 0/7511 useless extension candidates. Maximal degree in co-relation 22455. Up to 4009 conditions per place. [2024-10-14 19:55:35,800 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 101 selfloop transitions, 46 changer transitions 0/164 dead transitions. [2024-10-14 19:55:35,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 164 transitions, 934 flow [2024-10-14 19:55:35,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 19:55:35,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 19:55:35,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 427 transitions. [2024-10-14 19:55:35,803 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4765625 [2024-10-14 19:55:35,803 INFO L175 Difference]: Start difference. First operand has 72 places, 77 transitions, 295 flow. Second operand 14 states and 427 transitions. [2024-10-14 19:55:35,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 164 transitions, 934 flow [2024-10-14 19:55:35,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 164 transitions, 901 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:55:35,807 INFO L231 Difference]: Finished difference. Result has 89 places, 103 transitions, 588 flow [2024-10-14 19:55:35,808 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=588, PETRI_PLACES=89, PETRI_TRANSITIONS=103} [2024-10-14 19:55:35,808 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 23 predicate places. [2024-10-14 19:55:35,808 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 103 transitions, 588 flow [2024-10-14 19:55:35,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.4) internal successors, (234), 10 states have internal predecessors, (234), 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 19:55:35,809 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:55:35,809 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:55:35,813 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 19:55:36,010 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 19:55:36,010 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 19:55:36,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:55:36,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1799809183, now seen corresponding path program 1 times [2024-10-14 19:55:36,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:55:36,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997186517] [2024-10-14 19:55:36,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:55:36,012 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 19:55:36,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:55:36,014 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 19:55:36,015 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 19:55:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:55:36,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 19:55:36,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:55:36,092 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 19:55:36,111 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-14 19:55:36,112 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 19:55:36,150 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 19:55:36,150 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:55:36,151 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:55:36,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997186517] [2024-10-14 19:55:36,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997186517] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:55:36,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:55:36,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:55:36,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363195988] [2024-10-14 19:55:36,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:55:36,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:55:36,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:55:36,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:55:36,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:55:36,176 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-10-14 19:55:36,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 103 transitions, 588 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 19:55:36,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:55:36,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-10-14 19:55:36,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:55:37,017 INFO L124 PetriNetUnfolderBase]: 4405/7020 cut-off events. [2024-10-14 19:55:37,017 INFO L125 PetriNetUnfolderBase]: For 2984/2984 co-relation queries the response was YES. [2024-10-14 19:55:37,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15592 conditions, 7020 events. 4405/7020 cut-off events. For 2984/2984 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 54414 event pairs, 4176 based on Foata normal form. 0/5608 useless extension candidates. Maximal degree in co-relation 15493. Up to 6100 conditions per place. [2024-10-14 19:55:37,060 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 67 selfloop transitions, 15 changer transitions 0/101 dead transitions. [2024-10-14 19:55:37,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 101 transitions, 744 flow [2024-10-14 19:55:37,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:55:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:55:37,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-10-14 19:55:37,062 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-10-14 19:55:37,062 INFO L175 Difference]: Start difference. First operand has 89 places, 103 transitions, 588 flow. Second operand 5 states and 154 transitions. [2024-10-14 19:55:37,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 101 transitions, 744 flow [2024-10-14 19:55:37,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 101 transitions, 741 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:55:37,069 INFO L231 Difference]: Finished difference. Result has 90 places, 101 transitions, 607 flow [2024-10-14 19:55:37,069 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=607, PETRI_PLACES=90, PETRI_TRANSITIONS=101} [2024-10-14 19:55:37,069 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 24 predicate places. [2024-10-14 19:55:37,070 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 101 transitions, 607 flow [2024-10-14 19:55:37,070 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 19:55:37,070 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:55:37,070 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:55:37,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2024-10-14 19:55:37,270 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 19:55:37,271 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 19:55:37,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:55:37,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1137220054, now seen corresponding path program 1 times [2024-10-14 19:55:37,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:55:37,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079514255] [2024-10-14 19:55:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:55:37,272 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 19:55:37,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:55:37,273 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 19:55:37,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-14 19:55:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:55:37,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 19:55:37,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:55:37,366 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 19:55:37,367 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:55:37,367 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:55:37,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079514255] [2024-10-14 19:55:37,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079514255] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:55:37,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:55:37,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:55:37,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813410430] [2024-10-14 19:55:37,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:55:37,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:55:37,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:55:37,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:55:37,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:55:37,378 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-10-14 19:55:37,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 101 transitions, 607 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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 19:55:37,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:55:37,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-10-14 19:55:37,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:55:38,215 INFO L124 PetriNetUnfolderBase]: 5464/9051 cut-off events. [2024-10-14 19:55:38,215 INFO L125 PetriNetUnfolderBase]: For 3890/3890 co-relation queries the response was YES. [2024-10-14 19:55:38,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20021 conditions, 9051 events. 5464/9051 cut-off events. For 3890/3890 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 74756 event pairs, 5216 based on Foata normal form. 332/7803 useless extension candidates. Maximal degree in co-relation 15082. Up to 6144 conditions per place. [2024-10-14 19:55:38,262 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 91 selfloop transitions, 12 changer transitions 0/122 dead transitions. [2024-10-14 19:55:38,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 122 transitions, 879 flow [2024-10-14 19:55:38,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:55:38,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:55:38,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 164 transitions. [2024-10-14 19:55:38,263 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.640625 [2024-10-14 19:55:38,263 INFO L175 Difference]: Start difference. First operand has 90 places, 101 transitions, 607 flow. Second operand 4 states and 164 transitions. [2024-10-14 19:55:38,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 122 transitions, 879 flow [2024-10-14 19:55:38,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 122 transitions, 858 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:55:38,270 INFO L231 Difference]: Finished difference. Result has 91 places, 101 transitions, 621 flow [2024-10-14 19:55:38,271 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=621, PETRI_PLACES=91, PETRI_TRANSITIONS=101} [2024-10-14 19:55:38,271 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 25 predicate places. [2024-10-14 19:55:38,271 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 101 transitions, 621 flow [2024-10-14 19:55:38,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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 19:55:38,271 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:55:38,272 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-14 19:55:38,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2024-10-14 19:55:38,472 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 19:55:38,473 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 19:55:38,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:55:38,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1555360153, now seen corresponding path program 2 times [2024-10-14 19:55:38,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:55:38,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276728210] [2024-10-14 19:55:38,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:55:38,473 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 19:55:38,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:55:38,474 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 19:55:38,475 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 19:55:38,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:55:38,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:55:38,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 19:55:38,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:55:38,543 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 19:55:38,719 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 19:55:38,719 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:55:39,124 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 19:55:39,124 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:55:39,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276728210] [2024-10-14 19:55:39,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276728210] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:55:39,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:55:39,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:55:39,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013527350] [2024-10-14 19:55:39,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:55:39,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:55:39,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:55:39,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:55:39,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:55:39,292 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-10-14 19:55:39,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 101 transitions, 621 flow. Second operand has 14 states, 14 states have (on average 25.571428571428573) internal successors, (358), 14 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:55:39,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:55:39,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-10-14 19:55:39,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:55:41,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:55:43,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:55:48,064 INFO L124 PetriNetUnfolderBase]: 5494/9141 cut-off events. [2024-10-14 19:55:48,065 INFO L125 PetriNetUnfolderBase]: For 4820/4820 co-relation queries the response was YES. [2024-10-14 19:55:48,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22136 conditions, 9141 events. 5494/9141 cut-off events. For 4820/4820 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 76131 event pairs, 5216 based on Foata normal form. 30/7559 useless extension candidates. Maximal degree in co-relation 16905. Up to 7801 conditions per place. [2024-10-14 19:55:48,126 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 37 selfloop transitions, 107 changer transitions 0/161 dead transitions. [2024-10-14 19:55:48,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 161 transitions, 1389 flow [2024-10-14 19:55:48,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 19:55:48,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-14 19:55:48,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 634 transitions. [2024-10-14 19:55:48,129 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4502840909090909 [2024-10-14 19:55:48,129 INFO L175 Difference]: Start difference. First operand has 91 places, 101 transitions, 621 flow. Second operand 22 states and 634 transitions. [2024-10-14 19:55:48,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 161 transitions, 1389 flow [2024-10-14 19:55:48,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 161 transitions, 1374 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:55:48,152 INFO L231 Difference]: Finished difference. Result has 117 places, 161 transitions, 1390 flow [2024-10-14 19:55:48,152 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1390, PETRI_PLACES=117, PETRI_TRANSITIONS=161} [2024-10-14 19:55:48,153 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 51 predicate places. [2024-10-14 19:55:48,153 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 161 transitions, 1390 flow [2024-10-14 19:55:48,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 25.571428571428573) internal successors, (358), 14 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:55:48,154 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:55:48,154 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:55:48,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2024-10-14 19:55:48,354 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 19:55:48,354 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 19:55:48,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:55:48,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1692219582, now seen corresponding path program 1 times [2024-10-14 19:55:48,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:55:48,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768256603] [2024-10-14 19:55:48,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:55:48,355 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 19:55:48,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:55:48,358 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 19:55:48,359 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 19:55:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:55:48,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 19:55:48,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:55:48,428 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 19:55:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:55:48,569 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:55:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:55:49,028 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:55:49,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768256603] [2024-10-14 19:55:49,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768256603] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:55:49,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:55:49,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-10-14 19:55:49,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141724125] [2024-10-14 19:55:49,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:55:49,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 19:55:49,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:55:49,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 19:55:49,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-14 19:55:49,274 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-10-14 19:55:49,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 161 transitions, 1390 flow. Second operand has 8 states, 8 states have (on average 26.125) internal successors, (209), 8 states have internal predecessors, (209), 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 19:55:49,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:55:49,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-10-14 19:55:49,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:55:51,863 INFO L124 PetriNetUnfolderBase]: 10520/17523 cut-off events. [2024-10-14 19:55:51,864 INFO L125 PetriNetUnfolderBase]: For 9593/9593 co-relation queries the response was YES. [2024-10-14 19:55:51,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41777 conditions, 17523 events. 10520/17523 cut-off events. For 9593/9593 co-relation queries the response was YES. Maximal size of possible extension queue 1107. Compared 155630 event pairs, 9932 based on Foata normal form. 0/15079 useless extension candidates. Maximal degree in co-relation 41534. Up to 6153 conditions per place. [2024-10-14 19:55:51,991 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 115 selfloop transitions, 96 changer transitions 0/228 dead transitions. [2024-10-14 19:55:51,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 228 transitions, 2026 flow [2024-10-14 19:55:51,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 19:55:51,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 19:55:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 332 transitions. [2024-10-14 19:55:51,993 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-10-14 19:55:51,993 INFO L175 Difference]: Start difference. First operand has 117 places, 161 transitions, 1390 flow. Second operand 9 states and 332 transitions. [2024-10-14 19:55:51,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 228 transitions, 2026 flow [2024-10-14 19:55:52,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 228 transitions, 1746 flow, removed 87 selfloop flow, removed 9 redundant places. [2024-10-14 19:55:52,037 INFO L231 Difference]: Finished difference. Result has 118 places, 161 transitions, 1315 flow [2024-10-14 19:55:52,037 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1315, PETRI_PLACES=118, PETRI_TRANSITIONS=161} [2024-10-14 19:55:52,038 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 52 predicate places. [2024-10-14 19:55:52,038 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 161 transitions, 1315 flow [2024-10-14 19:55:52,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 26.125) internal successors, (209), 8 states have internal predecessors, (209), 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 19:55:52,038 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:55:52,038 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:55:52,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-10-14 19:55:52,238 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:55:52,239 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 19:55:52,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:55:52,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1507475913, now seen corresponding path program 2 times [2024-10-14 19:55:52,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:55:52,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235359132] [2024-10-14 19:55:52,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:55:52,240 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 19:55:52,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:55:52,241 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:55:52,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-14 19:55:52,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 19:55:52,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:55:52,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-14 19:55:52,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:55:52,310 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 19:55:52,315 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 19:55:52,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:55:52,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 19:55:52,422 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:55:52,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-14 19:55:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 19:55:52,475 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:55:52,475 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:55:52,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235359132] [2024-10-14 19:55:52,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235359132] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:55:52,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:55:52,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:55:52,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936565607] [2024-10-14 19:55:52,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:55:52,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:55:52,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:55:52,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:55:52,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:55:52,488 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-10-14 19:55:52,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 161 transitions, 1315 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 19:55:52,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:55:52,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-10-14 19:55:52,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:55:53,744 INFO L124 PetriNetUnfolderBase]: 8503/14424 cut-off events. [2024-10-14 19:55:53,744 INFO L125 PetriNetUnfolderBase]: For 11785/11785 co-relation queries the response was YES. [2024-10-14 19:55:53,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33819 conditions, 14424 events. 8503/14424 cut-off events. For 11785/11785 co-relation queries the response was YES. Maximal size of possible extension queue 944. Compared 128507 event pairs, 8000 based on Foata normal form. 598/13426 useless extension candidates. Maximal degree in co-relation 33588. Up to 12225 conditions per place. [2024-10-14 19:55:53,835 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 128 selfloop transitions, 12 changer transitions 0/159 dead transitions. [2024-10-14 19:55:53,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 159 transitions, 1579 flow [2024-10-14 19:55:53,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:55:53,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:55:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-10-14 19:55:53,837 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-14 19:55:53,837 INFO L175 Difference]: Start difference. First operand has 118 places, 161 transitions, 1315 flow. Second operand 4 states and 128 transitions. [2024-10-14 19:55:53,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 159 transitions, 1579 flow [2024-10-14 19:55:53,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 159 transitions, 1540 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:55:53,868 INFO L231 Difference]: Finished difference. Result has 117 places, 159 transitions, 1284 flow [2024-10-14 19:55:53,868 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1284, PETRI_PLACES=117, PETRI_TRANSITIONS=159} [2024-10-14 19:55:53,869 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 51 predicate places. [2024-10-14 19:55:53,869 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 159 transitions, 1284 flow [2024-10-14 19:55:53,869 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 19:55:53,869 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:55:53,869 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:55:53,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-10-14 19:55:54,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:55:54,070 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 19:55:54,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:55:54,070 INFO L85 PathProgramCache]: Analyzing trace with hash 722699914, now seen corresponding path program 2 times [2024-10-14 19:55:54,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:55:54,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490024469] [2024-10-14 19:55:54,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:55:54,071 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 19:55:54,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:55:54,072 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:55:54,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-14 19:55:54,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 19:55:54,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:55:54,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 19:55:54,134 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:55:54,141 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 19:55:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 19:55:54,234 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:55:54,234 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:55:54,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490024469] [2024-10-14 19:55:54,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490024469] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:55:54,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:55:54,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:55:54,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482583100] [2024-10-14 19:55:54,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:55:54,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:55:54,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:55:54,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:55:54,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:55:54,255 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-10-14 19:55:54,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 159 transitions, 1284 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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 19:55:54,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:55:54,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-10-14 19:55:54,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:55:55,373 INFO L124 PetriNetUnfolderBase]: 6995/12180 cut-off events. [2024-10-14 19:55:55,373 INFO L125 PetriNetUnfolderBase]: For 6602/6602 co-relation queries the response was YES. [2024-10-14 19:55:55,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26934 conditions, 12180 events. 6995/12180 cut-off events. For 6602/6602 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 109075 event pairs, 6532 based on Foata normal form. 378/11265 useless extension candidates. Maximal degree in co-relation 26705. Up to 10048 conditions per place. [2024-10-14 19:55:55,431 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 112 selfloop transitions, 26 changer transitions 0/157 dead transitions. [2024-10-14 19:55:55,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 157 transitions, 1544 flow [2024-10-14 19:55:55,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:55:55,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:55:55,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-10-14 19:55:55,432 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2024-10-14 19:55:55,432 INFO L175 Difference]: Start difference. First operand has 117 places, 159 transitions, 1284 flow. Second operand 4 states and 134 transitions. [2024-10-14 19:55:55,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 157 transitions, 1544 flow [2024-10-14 19:55:55,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 157 transitions, 1526 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 19:55:55,448 INFO L231 Difference]: Finished difference. Result has 114 places, 157 transitions, 1302 flow [2024-10-14 19:55:55,449 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1250, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1302, PETRI_PLACES=114, PETRI_TRANSITIONS=157} [2024-10-14 19:55:55,449 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 48 predicate places. [2024-10-14 19:55:55,449 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 157 transitions, 1302 flow [2024-10-14 19:55:55,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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 19:55:55,449 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:55:55,449 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-10-14 19:55:55,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2024-10-14 19:55:55,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:55:55,650 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-14 19:55:55,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:55:55,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1560028007, now seen corresponding path program 3 times [2024-10-14 19:55:55,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:55:55,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403578968] [2024-10-14 19:55:55,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 19:55:55,651 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 19:55:55,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:55:55,654 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:55:55,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-14 19:55:55,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-14 19:55:55,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:55:55,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 19:55:55,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:55:55,832 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 19:55:56,227 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:55:56,228 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:55:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:55:57,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:55:57,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403578968] [2024-10-14 19:55:57,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403578968] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:55:57,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:55:57,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-10-14 19:55:57,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13490726] [2024-10-14 19:55:57,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:55:57,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 19:55:57,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:55:57,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 19:55:57,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-10-14 19:55:58,509 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-10-14 19:55:58,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 157 transitions, 1302 flow. Second operand has 26 states, 26 states have (on average 25.76923076923077) internal successors, (670), 26 states have internal predecessors, (670), 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 19:55:58,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:55:58,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-10-14 19:55:58,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:06,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:07,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:09,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:10,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:11,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:14,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:17,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:18,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:20,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:21,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:24,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:25,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:29,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:37,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:39,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:42,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:45,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:47,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:52,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:55,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []