./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-min-max-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d 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-min-max-dec.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 67ced8cbf918778cce3ae5cae291c50696df3950945fdf68713903c29ac269e1 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:42:35,472 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:42:35,546 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 12:42:35,554 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:42:35,556 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:42:35,583 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:42:35,584 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:42:35,584 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:42:35,585 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:42:35,586 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:42:35,587 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:42:35,587 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:42:35,588 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:42:35,588 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:42:35,590 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:42:35,590 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:42:35,591 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:42:35,591 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:42:35,591 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:42:35,591 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:42:35,591 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:42:35,594 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:42:35,595 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:42:35,595 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:42:35,595 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:42:35,595 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:42:35,596 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:42:35,596 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:42:35,596 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:42:35,596 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:42:35,597 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:42:35,597 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:42:35,597 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:42:35,597 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:42:35,597 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:42:35,597 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:42:35,598 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 12:42:35,598 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 12:42:35,598 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:42:35,598 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:42:35,599 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:42:35,600 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:42:35,600 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67ced8cbf918778cce3ae5cae291c50696df3950945fdf68713903c29ac269e1 [2024-10-13 12:42:35,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:42:35,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:42:35,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:42:35,899 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:42:35,900 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:42:35,901 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2024-10-13 12:42:37,318 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:42:37,497 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:42:37,497 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2024-10-13 12:42:37,505 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/886f77a4d/ef23c088707f447dbc0c039af72b7dc3/FLAG0d46765af [2024-10-13 12:42:37,519 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/886f77a4d/ef23c088707f447dbc0c039af72b7dc3 [2024-10-13 12:42:37,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:42:37,522 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:42:37,523 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:42:37,523 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:42:37,529 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:42:37,529 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:42:37" (1/1) ... [2024-10-13 12:42:37,530 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@259f7b21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:37, skipping insertion in model container [2024-10-13 12:42:37,530 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:42:37" (1/1) ... [2024-10-13 12:42:37,556 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:42:37,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:42:37,778 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) [2024-10-13 12:42:37,778 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@184b210c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:37, skipping insertion in model container [2024-10-13 12:42:37,778 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:42:37,779 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-13 12:42:37,780 INFO L158 Benchmark]: Toolchain (without parser) took 257.29ms. Allocated memory was 125.8MB in the beginning and 184.5MB in the end (delta: 58.7MB). Free memory was 54.6MB in the beginning and 155.8MB in the end (delta: -101.2MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. [2024-10-13 12:42:37,781 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 125.8MB. Free memory is still 85.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-13 12:42:37,781 INFO L158 Benchmark]: CACSL2BoogieTranslator took 255.45ms. Allocated memory was 125.8MB in the beginning and 184.5MB in the end (delta: 58.7MB). Free memory was 54.5MB in the beginning and 155.8MB in the end (delta: -101.3MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. [2024-10-13 12:42:37,783 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 125.8MB. Free memory is still 85.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 255.45ms. Allocated memory was 125.8MB in the beginning and 184.5MB in the end (delta: 58.7MB). Free memory was 54.5MB in the beginning and 155.8MB in the end (delta: -101.3MB). Peak memory consumption was 17.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 129]: 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-min-max-dec.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 67ced8cbf918778cce3ae5cae291c50696df3950945fdf68713903c29ac269e1 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:42:39,754 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:42:39,830 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-13 12:42:39,834 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:42:39,834 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:42:39,859 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:42:39,860 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:42:39,860 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:42:39,860 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:42:39,861 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:42:39,861 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:42:39,861 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:42:39,861 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:42:39,862 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:42:39,862 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:42:39,864 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:42:39,865 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:42:39,866 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:42:39,866 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:42:39,867 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:42:39,867 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:42:39,867 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:42:39,867 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:42:39,869 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:42:39,869 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:42:39,869 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-13 12:42:39,869 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:42:39,869 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-13 12:42:39,870 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:42:39,870 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:42:39,870 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:42:39,870 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:42:39,870 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:42:39,870 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:42:39,876 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:42:39,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:42:39,877 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:42:39,877 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:42:39,878 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-13 12:42:39,878 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-13 12:42:39,878 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:42:39,879 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:42:39,879 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:42:39,880 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:42:39,880 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-13 12:42:39,881 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67ced8cbf918778cce3ae5cae291c50696df3950945fdf68713903c29ac269e1 [2024-10-13 12:42:40,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:42:40,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:42:40,184 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:42:40,185 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:42:40,186 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:42:40,188 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2024-10-13 12:42:41,644 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:42:41,841 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:42:41,843 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2024-10-13 12:42:41,854 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eef2f3a1/e3188592237a41f5ba0fb144977f748a/FLAG3183314d2 [2024-10-13 12:42:42,216 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eef2f3a1/e3188592237a41f5ba0fb144977f748a [2024-10-13 12:42:42,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:42:42,220 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:42:42,222 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:42:42,223 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:42:42,227 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:42:42,228 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:42:42" (1/1) ... [2024-10-13 12:42:42,229 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56dc4c08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:42, skipping insertion in model container [2024-10-13 12:42:42,229 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:42:42" (1/1) ... [2024-10-13 12:42:42,254 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:42:42,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:42:42,472 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-13 12:42:42,477 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:42:42,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:42:42,504 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 12:42:42,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:42:42,553 INFO L204 MainTranslator]: Completed translation [2024-10-13 12:42:42,553 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:42 WrapperNode [2024-10-13 12:42:42,553 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:42:42,554 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 12:42:42,554 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 12:42:42,554 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 12:42:42,560 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:42" (1/1) ... [2024-10-13 12:42:42,576 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:42" (1/1) ... [2024-10-13 12:42:42,598 INFO L138 Inliner]: procedures = 27, calls = 44, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 117 [2024-10-13 12:42:42,601 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 12:42:42,601 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 12:42:42,602 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 12:42:42,602 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 12:42:42,610 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:42" (1/1) ... [2024-10-13 12:42:42,611 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:42" (1/1) ... [2024-10-13 12:42:42,618 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:42" (1/1) ... [2024-10-13 12:42:42,645 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-13 12:42:42,645 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:42" (1/1) ... [2024-10-13 12:42:42,646 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:42" (1/1) ... [2024-10-13 12:42:42,657 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:42" (1/1) ... [2024-10-13 12:42:42,664 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:42" (1/1) ... [2024-10-13 12:42:42,665 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:42" (1/1) ... [2024-10-13 12:42:42,670 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:42" (1/1) ... [2024-10-13 12:42:42,673 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 12:42:42,677 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 12:42:42,677 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 12:42:42,677 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 12:42:42,677 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:42" (1/1) ... [2024-10-13 12:42:42,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:42:42,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:42:42,707 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) [2024-10-13 12:42:42,709 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 [2024-10-13 12:42:42,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 12:42:42,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-13 12:42:42,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-13 12:42:42,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-13 12:42:42,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-13 12:42:42,745 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 12:42:42,746 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 12:42:42,746 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 12:42:42,746 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 12:42:42,746 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-13 12:42:42,746 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-13 12:42:42,746 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-13 12:42:42,746 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-13 12:42:42,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 12:42:42,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 12:42:42,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 12:42:42,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 12:42:42,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 12:42:42,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-13 12:42:42,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-13 12:42:42,749 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 12:42:42,858 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 12:42:42,860 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 12:42:43,275 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 12:42:43,276 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 12:42:43,550 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 12:42:43,551 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-13 12:42:43,551 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:42:43 BoogieIcfgContainer [2024-10-13 12:42:43,551 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 12:42:43,554 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 12:42:43,555 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 12:42:43,557 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 12:42:43,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:42:42" (1/3) ... [2024-10-13 12:42:43,558 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45d22912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:42:43, skipping insertion in model container [2024-10-13 12:42:43,558 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:42" (2/3) ... [2024-10-13 12:42:43,559 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45d22912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:42:43, skipping insertion in model container [2024-10-13 12:42:43,560 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:42:43" (3/3) ... [2024-10-13 12:42:43,561 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2024-10-13 12:42:43,574 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 12:42:43,575 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-10-13 12:42:43,575 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 12:42:43,639 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-13 12:42:43,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 69 transitions, 166 flow [2024-10-13 12:42:43,714 INFO L124 PetriNetUnfolderBase]: 4/65 cut-off events. [2024-10-13 12:42:43,715 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-13 12:42:43,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 65 events. 4/65 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 214 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2024-10-13 12:42:43,721 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 69 transitions, 166 flow [2024-10-13 12:42:43,724 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 64 transitions, 152 flow [2024-10-13 12:42:43,735 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:42:43,740 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;@39498d9a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:42:43,741 INFO L334 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2024-10-13 12:42:43,743 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:42:43,743 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-13 12:42:43,746 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:42:43,747 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:42:43,747 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:42:43,747 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-13 12:42:43,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:42:43,752 INFO L85 PathProgramCache]: Analyzing trace with hash 549374, now seen corresponding path program 1 times [2024-10-13 12:42:43,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:42:43,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320613758] [2024-10-13 12:42:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:42:43,762 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 [2024-10-13 12:42:43,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:42:43,765 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) [2024-10-13 12:42:43,785 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 [2024-10-13 12:42:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:42:43,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 12:42:43,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:42:43,928 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 [2024-10-13 12:42:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:42:43,946 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:42:43,947 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:42:43,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320613758] [2024-10-13 12:42:43,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320613758] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:42:43,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:42:43,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:42:43,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459878088] [2024-10-13 12:42:43,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:42:43,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:42:43,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:42:43,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:42:43,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:42:44,000 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-13 12:42:44,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2024-10-13 12:42:44,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:42:44,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-13 12:42:44,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:42:45,728 INFO L124 PetriNetUnfolderBase]: 11431/16154 cut-off events. [2024-10-13 12:42:45,729 INFO L125 PetriNetUnfolderBase]: For 331/331 co-relation queries the response was YES. [2024-10-13 12:42:45,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32082 conditions, 16154 events. 11431/16154 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 109029 event pairs, 8159 based on Foata normal form. 1/10221 useless extension candidates. Maximal degree in co-relation 31041. Up to 14643 conditions per place. [2024-10-13 12:42:45,905 INFO L140 encePairwiseOnDemand]: 57/69 looper letters, 38 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2024-10-13 12:42:45,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 53 transitions, 210 flow [2024-10-13 12:42:45,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:42:45,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:42:45,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-10-13 12:42:45,920 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5024154589371981 [2024-10-13 12:42:45,922 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 152 flow. Second operand 3 states and 104 transitions. [2024-10-13 12:42:45,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 53 transitions, 210 flow [2024-10-13 12:42:45,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 53 transitions, 194 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-13 12:42:45,997 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 118 flow [2024-10-13 12:42:45,999 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2024-10-13 12:42:46,002 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -17 predicate places. [2024-10-13 12:42:46,002 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 118 flow [2024-10-13 12:42:46,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2024-10-13 12:42:46,003 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:42:46,003 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-13 12:42:46,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2024-10-13 12:42:46,204 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 [2024-10-13 12:42:46,205 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-13 12:42:46,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:42:46,205 INFO L85 PathProgramCache]: Analyzing trace with hash 549375, now seen corresponding path program 1 times [2024-10-13 12:42:46,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:42:46,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [604580085] [2024-10-13 12:42:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:42:46,206 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 [2024-10-13 12:42:46,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:42:46,208 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) [2024-10-13 12:42:46,209 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 [2024-10-13 12:42:46,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:42:46,255 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-13 12:42:46,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:42:46,278 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 [2024-10-13 12:42:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:42:46,384 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:42:46,384 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:42:46,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [604580085] [2024-10-13 12:42:46,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [604580085] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:42:46,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:42:46,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:42:46,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387171594] [2024-10-13 12:42:46,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:42:46,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:42:46,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:42:46,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:42:46,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:42:46,393 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-13 12:42:46,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2024-10-13 12:42:46,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:42:46,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-13 12:42:46,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:42:47,924 INFO L124 PetriNetUnfolderBase]: 11431/16156 cut-off events. [2024-10-13 12:42:47,924 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-10-13 12:42:48,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31386 conditions, 16156 events. 11431/16156 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 108913 event pairs, 8159 based on Foata normal form. 1/10223 useless extension candidates. Maximal degree in co-relation 31367. Up to 14647 conditions per place. [2024-10-13 12:42:48,100 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 41 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-10-13 12:42:48,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 55 transitions, 208 flow [2024-10-13 12:42:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:42:48,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:42:48,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-10-13 12:42:48,102 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2024-10-13 12:42:48,102 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 118 flow. Second operand 3 states and 99 transitions. [2024-10-13 12:42:48,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 55 transitions, 208 flow [2024-10-13 12:42:48,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:42:48,105 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 128 flow [2024-10-13 12:42:48,105 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-10-13 12:42:48,106 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -16 predicate places. [2024-10-13 12:42:48,106 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 128 flow [2024-10-13 12:42:48,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 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) [2024-10-13 12:42:48,106 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:42:48,107 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-13 12:42:48,114 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 [2024-10-13 12:42:48,309 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 [2024-10-13 12:42:48,309 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-13 12:42:48,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:42:48,310 INFO L85 PathProgramCache]: Analyzing trace with hash 527967317, now seen corresponding path program 1 times [2024-10-13 12:42:48,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:42:48,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935176805] [2024-10-13 12:42:48,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:42:48,311 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 [2024-10-13 12:42:48,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:42:48,314 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) [2024-10-13 12:42:48,315 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 [2024-10-13 12:42:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:42:48,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 12:42:48,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:42:48,376 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 [2024-10-13 12:42:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:42:48,512 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:42:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:42:48,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:42:48,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935176805] [2024-10-13 12:42:48,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935176805] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:42:48,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:42:48,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-13 12:42:48,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340237057] [2024-10-13 12:42:48,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:42:48,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 12:42:48,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:42:48,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 12:42:48,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-13 12:42:48,805 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-13 12:42:48,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 128 flow. Second operand has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 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) [2024-10-13 12:42:48,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:42:48,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-13 12:42:48,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:42:50,446 INFO L124 PetriNetUnfolderBase]: 11434/16165 cut-off events. [2024-10-13 12:42:50,446 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-10-13 12:42:50,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31415 conditions, 16165 events. 11434/16165 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 109243 event pairs, 8159 based on Foata normal form. 0/10231 useless extension candidates. Maximal degree in co-relation 31402. Up to 14650 conditions per place. [2024-10-13 12:42:50,523 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 41 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2024-10-13 12:42:50,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 264 flow [2024-10-13 12:42:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-13 12:42:50,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-13 12:42:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-10-13 12:42:50,527 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3494363929146538 [2024-10-13 12:42:50,527 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 128 flow. Second operand 9 states and 217 transitions. [2024-10-13 12:42:50,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 264 flow [2024-10-13 12:42:50,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 64 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:42:50,529 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 200 flow [2024-10-13 12:42:50,529 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=200, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-10-13 12:42:50,530 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -6 predicate places. [2024-10-13 12:42:50,532 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 200 flow [2024-10-13 12:42:50,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 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) [2024-10-13 12:42:50,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:42:50,533 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:42:50,537 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 [2024-10-13 12:42:50,735 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 [2024-10-13 12:42:50,736 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-13 12:42:50,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:42:50,736 INFO L85 PathProgramCache]: Analyzing trace with hash 570562296, now seen corresponding path program 1 times [2024-10-13 12:42:50,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:42:50,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066864332] [2024-10-13 12:42:50,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:42:50,737 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 [2024-10-13 12:42:50,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:42:50,740 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) [2024-10-13 12:42:50,741 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 [2024-10-13 12:42:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:42:50,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-13 12:42:50,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:42:50,795 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 [2024-10-13 12:42:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:42:50,816 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:42:50,817 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:42:50,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066864332] [2024-10-13 12:42:50,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066864332] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:42:50,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:42:50,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:42:50,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659282975] [2024-10-13 12:42:50,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:42:50,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:42:50,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:42:50,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:42:50,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:42:50,833 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-13 12:42:50,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:42:50,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:42:50,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-13 12:42:50,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:42:51,505 INFO L124 PetriNetUnfolderBase]: 5709/8216 cut-off events. [2024-10-13 12:42:51,505 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-13 12:42:51,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15936 conditions, 8216 events. 5709/8216 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 51542 event pairs, 4029 based on Foata normal form. 0/6116 useless extension candidates. Maximal degree in co-relation 15905. Up to 7368 conditions per place. [2024-10-13 12:42:51,548 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 41 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-10-13 12:42:51,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 59 transitions, 282 flow [2024-10-13 12:42:51,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:42:51,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:42:51,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-10-13 12:42:51,550 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4057971014492754 [2024-10-13 12:42:51,550 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 200 flow. Second operand 4 states and 112 transitions. [2024-10-13 12:42:51,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 59 transitions, 282 flow [2024-10-13 12:42:51,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 268 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-13 12:42:51,552 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 186 flow [2024-10-13 12:42:51,552 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-10-13 12:42:51,553 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -9 predicate places. [2024-10-13 12:42:51,553 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 186 flow [2024-10-13 12:42:51,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:42:51,553 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:42:51,553 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:42:51,557 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 [2024-10-13 12:42:51,756 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 [2024-10-13 12:42:51,756 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-13 12:42:51,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:42:51,756 INFO L85 PathProgramCache]: Analyzing trace with hash 570562297, now seen corresponding path program 1 times [2024-10-13 12:42:51,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:42:51,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630834931] [2024-10-13 12:42:51,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:42:51,757 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 [2024-10-13 12:42:51,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:42:51,760 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) [2024-10-13 12:42:51,761 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 [2024-10-13 12:42:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:42:51,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 12:42:51,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:42:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:42:51,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:42:51,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2024-10-13 12:42:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:42:51,978 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:42:51,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630834931] [2024-10-13 12:42:51,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630834931] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:42:51,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:42:51,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-10-13 12:42:51,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346476860] [2024-10-13 12:42:51,979 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:42:51,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 12:42:51,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:42:51,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 12:42:51,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-13 12:42:52,019 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 69 [2024-10-13 12:42:52,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 186 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 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) [2024-10-13 12:42:52,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:42:52,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 69 [2024-10-13 12:42:52,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:42:52,735 INFO L124 PetriNetUnfolderBase]: 4336/6228 cut-off events. [2024-10-13 12:42:52,735 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-10-13 12:42:52,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12068 conditions, 6228 events. 4336/6228 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 37779 event pairs, 2926 based on Foata normal form. 0/4892 useless extension candidates. Maximal degree in co-relation 12036. Up to 5568 conditions per place. [2024-10-13 12:42:52,777 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 37 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-10-13 12:42:52,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 57 transitions, 270 flow [2024-10-13 12:42:52,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:42:52,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:42:52,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-10-13 12:42:52,780 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3719806763285024 [2024-10-13 12:42:52,780 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 186 flow. Second operand 6 states and 154 transitions. [2024-10-13 12:42:52,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 57 transitions, 270 flow [2024-10-13 12:42:52,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 57 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:42:52,783 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 190 flow [2024-10-13 12:42:52,783 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2024-10-13 12:42:52,784 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -8 predicate places. [2024-10-13 12:42:52,784 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 190 flow [2024-10-13 12:42:52,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 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) [2024-10-13 12:42:52,784 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:42:52,785 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-13 12:42:52,789 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 [2024-10-13 12:42:52,985 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 [2024-10-13 12:42:52,986 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-13 12:42:52,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:42:52,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1927903831, now seen corresponding path program 2 times [2024-10-13 12:42:52,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:42:52,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496167871] [2024-10-13 12:42:52,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:42:52,987 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 [2024-10-13 12:42:52,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:42:52,988 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) [2024-10-13 12:42:52,991 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 [2024-10-13 12:42:53,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 12:42:53,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:42:53,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-13 12:42:53,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:42:53,074 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 [2024-10-13 12:42:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:42:53,323 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:42:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:42:54,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:42:54,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496167871] [2024-10-13 12:42:54,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496167871] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:42:54,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:42:54,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-13 12:42:54,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934604954] [2024-10-13 12:42:54,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:42:54,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 12:42:54,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:42:54,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 12:42:54,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:42:54,117 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-13 12:42:54,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 190 flow. Second operand has 14 states, 14 states have (on average 19.571428571428573) internal successors, (274), 14 states have internal predecessors, (274), 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) [2024-10-13 12:42:54,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:42:54,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-13 12:42:54,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:42:56,563 INFO L124 PetriNetUnfolderBase]: 4342/6246 cut-off events. [2024-10-13 12:42:56,563 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-10-13 12:42:56,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12153 conditions, 6246 events. 4342/6246 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 37984 event pairs, 2926 based on Foata normal form. 6/4916 useless extension candidates. Maximal degree in co-relation 12041. Up to 5579 conditions per place. [2024-10-13 12:42:56,593 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 34 selfloop transitions, 29 changer transitions 0/75 dead transitions. [2024-10-13 12:42:56,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 75 transitions, 430 flow [2024-10-13 12:42:56,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-13 12:42:56,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-13 12:42:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 447 transitions. [2024-10-13 12:42:56,596 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3084886128364389 [2024-10-13 12:42:56,596 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 190 flow. Second operand 21 states and 447 transitions. [2024-10-13 12:42:56,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 75 transitions, 430 flow [2024-10-13 12:42:56,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 424 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:42:56,598 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 386 flow [2024-10-13 12:42:56,599 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=386, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2024-10-13 12:42:56,599 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 15 predicate places. [2024-10-13 12:42:56,599 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 386 flow [2024-10-13 12:42:56,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.571428571428573) internal successors, (274), 14 states have internal predecessors, (274), 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) [2024-10-13 12:42:56,600 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:42:56,600 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:42:56,604 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 [2024-10-13 12:42:56,802 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 [2024-10-13 12:42:56,803 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-13 12:42:56,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:42:56,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1781827842, now seen corresponding path program 1 times [2024-10-13 12:42:56,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:42:56,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473580860] [2024-10-13 12:42:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:42:56,804 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 [2024-10-13 12:42:56,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:42:56,805 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) [2024-10-13 12:42:56,806 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 [2024-10-13 12:42:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:42:56,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 12:42:56,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:42:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:42:56,895 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:42:56,896 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:42:56,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473580860] [2024-10-13 12:42:56,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473580860] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:42:56,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:42:56,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:42:56,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001690749] [2024-10-13 12:42:56,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:42:56,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 12:42:56,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:42:56,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 12:42:56,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-13 12:42:56,907 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-13 12:42:56,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 75 transitions, 386 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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) [2024-10-13 12:42:56,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:42:56,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-13 12:42:56,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:42:57,542 INFO L124 PetriNetUnfolderBase]: 4709/7027 cut-off events. [2024-10-13 12:42:57,542 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2024-10-13 12:42:57,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13651 conditions, 7027 events. 4709/7027 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 42053 event pairs, 799 based on Foata normal form. 0/6147 useless extension candidates. Maximal degree in co-relation 13600. Up to 4518 conditions per place. [2024-10-13 12:42:57,580 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 81 selfloop transitions, 17 changer transitions 0/110 dead transitions. [2024-10-13 12:42:57,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 110 transitions, 658 flow [2024-10-13 12:42:57,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:42:57,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:42:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-10-13 12:42:57,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42995169082125606 [2024-10-13 12:42:57,582 INFO L175 Difference]: Start difference. First operand has 88 places, 75 transitions, 386 flow. Second operand 6 states and 178 transitions. [2024-10-13 12:42:57,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 110 transitions, 658 flow [2024-10-13 12:42:57,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 110 transitions, 570 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-10-13 12:42:57,585 INFO L231 Difference]: Finished difference. Result has 87 places, 80 transitions, 370 flow [2024-10-13 12:42:57,585 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=87, PETRI_TRANSITIONS=80} [2024-10-13 12:42:57,586 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 14 predicate places. [2024-10-13 12:42:57,586 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 80 transitions, 370 flow [2024-10-13 12:42:57,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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) [2024-10-13 12:42:57,586 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:42:57,587 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:42:57,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-13 12:42:57,787 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 [2024-10-13 12:42:57,787 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-13 12:42:57,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:42:57,788 INFO L85 PathProgramCache]: Analyzing trace with hash 940821450, now seen corresponding path program 1 times [2024-10-13 12:42:57,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:42:57,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609362166] [2024-10-13 12:42:57,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:42:57,789 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-13 12:42:57,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:42:57,790 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) [2024-10-13 12:42:57,795 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 [2024-10-13 12:42:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:42:57,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 12:42:57,846 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:42:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:42:57,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:42:58,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2024-10-13 12:42:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:42:58,101 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:42:58,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609362166] [2024-10-13 12:42:58,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609362166] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:42:58,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:42:58,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-13 12:42:58,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20280661] [2024-10-13 12:42:58,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:42:58,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-13 12:42:58,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:42:58,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-13 12:42:58,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-13 12:42:58,168 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 69 [2024-10-13 12:42:58,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 80 transitions, 370 flow. Second operand has 10 states, 10 states have (on average 21.2) internal successors, (212), 10 states have internal predecessors, (212), 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) [2024-10-13 12:42:58,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:42:58,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 69 [2024-10-13 12:42:58,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:42:59,419 INFO L124 PetriNetUnfolderBase]: 6889/9586 cut-off events. [2024-10-13 12:42:59,419 INFO L125 PetriNetUnfolderBase]: For 2194/2717 co-relation queries the response was YES. [2024-10-13 12:42:59,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21950 conditions, 9586 events. 6889/9586 cut-off events. For 2194/2717 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 56270 event pairs, 2211 based on Foata normal form. 789/9471 useless extension candidates. Maximal degree in co-relation 21902. Up to 5318 conditions per place. [2024-10-13 12:42:59,479 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 90 selfloop transitions, 18 changer transitions 0/121 dead transitions. [2024-10-13 12:42:59,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 121 transitions, 714 flow [2024-10-13 12:42:59,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:42:59,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:42:59,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-10-13 12:42:59,481 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40942028985507245 [2024-10-13 12:42:59,481 INFO L175 Difference]: Start difference. First operand has 87 places, 80 transitions, 370 flow. Second operand 8 states and 226 transitions. [2024-10-13 12:42:59,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 121 transitions, 714 flow [2024-10-13 12:42:59,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 121 transitions, 690 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-13 12:42:59,487 INFO L231 Difference]: Finished difference. Result has 93 places, 83 transitions, 420 flow [2024-10-13 12:42:59,487 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=420, PETRI_PLACES=93, PETRI_TRANSITIONS=83} [2024-10-13 12:42:59,488 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 20 predicate places. [2024-10-13 12:42:59,488 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 83 transitions, 420 flow [2024-10-13 12:42:59,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.2) internal successors, (212), 10 states have internal predecessors, (212), 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) [2024-10-13 12:42:59,489 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:42:59,489 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:42:59,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2024-10-13 12:42:59,689 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 [2024-10-13 12:42:59,690 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-13 12:42:59,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:42:59,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1303907659, now seen corresponding path program 1 times [2024-10-13 12:42:59,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:42:59,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85604244] [2024-10-13 12:42:59,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:42:59,691 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 [2024-10-13 12:42:59,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:42:59,692 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) [2024-10-13 12:42:59,693 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 [2024-10-13 12:42:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:42:59,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 12:42:59,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:42:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:42:59,813 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 12:42:59,813 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:42:59,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85604244] [2024-10-13 12:42:59,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85604244] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:42:59,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:42:59,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:42:59,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629804409] [2024-10-13 12:42:59,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:42:59,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 12:42:59,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:42:59,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 12:42:59,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-13 12:42:59,826 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-13 12:42:59,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 83 transitions, 420 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:42:59,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:42:59,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-13 12:42:59,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:43:00,760 INFO L124 PetriNetUnfolderBase]: 8649/12218 cut-off events. [2024-10-13 12:43:00,761 INFO L125 PetriNetUnfolderBase]: For 7401/8019 co-relation queries the response was YES. [2024-10-13 12:43:00,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31508 conditions, 12218 events. 8649/12218 cut-off events. For 7401/8019 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 72475 event pairs, 2175 based on Foata normal form. 618/12458 useless extension candidates. Maximal degree in co-relation 31457. Up to 8508 conditions per place. [2024-10-13 12:43:00,833 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 89 selfloop transitions, 17 changer transitions 0/118 dead transitions. [2024-10-13 12:43:00,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 118 transitions, 756 flow [2024-10-13 12:43:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:43:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:43:00,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-10-13 12:43:00,835 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4251207729468599 [2024-10-13 12:43:00,835 INFO L175 Difference]: Start difference. First operand has 93 places, 83 transitions, 420 flow. Second operand 6 states and 176 transitions. [2024-10-13 12:43:00,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 118 transitions, 756 flow [2024-10-13 12:43:00,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 118 transitions, 740 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 12:43:00,844 INFO L231 Difference]: Finished difference. Result has 95 places, 85 transitions, 451 flow [2024-10-13 12:43:00,845 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=451, PETRI_PLACES=95, PETRI_TRANSITIONS=85} [2024-10-13 12:43:00,846 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 22 predicate places. [2024-10-13 12:43:00,846 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 85 transitions, 451 flow [2024-10-13 12:43:00,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:43:00,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:43:00,846 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:43:00,849 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 [2024-10-13 12:43:01,046 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 [2024-10-13 12:43:01,047 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-13 12:43:01,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:43:01,047 INFO L85 PathProgramCache]: Analyzing trace with hash -931787505, now seen corresponding path program 1 times [2024-10-13 12:43:01,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:43:01,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730042734] [2024-10-13 12:43:01,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:43:01,048 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 [2024-10-13 12:43:01,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:43:01,049 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) [2024-10-13 12:43:01,050 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 [2024-10-13 12:43:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:43:01,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-13 12:43:01,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:43:01,129 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 [2024-10-13 12:43:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:43:01,294 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:43:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:43:01,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:43:01,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730042734] [2024-10-13 12:43:01,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730042734] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:43:01,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:43:01,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-13 12:43:01,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367554046] [2024-10-13 12:43:01,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:43:01,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 12:43:01,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:43:01,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 12:43:01,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-13 12:43:01,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 69 [2024-10-13 12:43:01,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 85 transitions, 451 flow. Second operand has 12 states, 12 states have (on average 19.0) internal successors, (228), 12 states have internal predecessors, (228), 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) [2024-10-13 12:43:01,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:43:01,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 69 [2024-10-13 12:43:01,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:43:04,746 INFO L124 PetriNetUnfolderBase]: 20199/26771 cut-off events. [2024-10-13 12:43:04,746 INFO L125 PetriNetUnfolderBase]: For 21940/23625 co-relation queries the response was YES. [2024-10-13 12:43:04,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76332 conditions, 26771 events. 20199/26771 cut-off events. For 21940/23625 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 155954 event pairs, 4578 based on Foata normal form. 2925/29461 useless extension candidates. Maximal degree in co-relation 76279. Up to 8600 conditions per place. [2024-10-13 12:43:04,947 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 252 selfloop transitions, 23 changer transitions 0/286 dead transitions. [2024-10-13 12:43:04,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 286 transitions, 1775 flow [2024-10-13 12:43:04,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 12:43:04,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 12:43:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 406 transitions. [2024-10-13 12:43:04,949 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49033816425120774 [2024-10-13 12:43:04,949 INFO L175 Difference]: Start difference. First operand has 95 places, 85 transitions, 451 flow. Second operand 12 states and 406 transitions. [2024-10-13 12:43:04,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 286 transitions, 1775 flow [2024-10-13 12:43:04,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 286 transitions, 1728 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 12:43:04,965 INFO L231 Difference]: Finished difference. Result has 106 places, 94 transitions, 528 flow [2024-10-13 12:43:04,965 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=528, PETRI_PLACES=106, PETRI_TRANSITIONS=94} [2024-10-13 12:43:04,965 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 33 predicate places. [2024-10-13 12:43:04,965 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 94 transitions, 528 flow [2024-10-13 12:43:04,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.0) internal successors, (228), 12 states have internal predecessors, (228), 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) [2024-10-13 12:43:04,966 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:43:04,966 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:43:04,970 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 [2024-10-13 12:43:05,166 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 [2024-10-13 12:43:05,166 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-13 12:43:05,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:43:05,167 INFO L85 PathProgramCache]: Analyzing trace with hash -944030150, now seen corresponding path program 1 times [2024-10-13 12:43:05,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:43:05,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506603783] [2024-10-13 12:43:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:43:05,167 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 [2024-10-13 12:43:05,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:43:05,168 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) [2024-10-13 12:43:05,169 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 [2024-10-13 12:43:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:43:05,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-13 12:43:05,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:43:05,233 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 [2024-10-13 12:43:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:43:05,412 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:43:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:43:05,710 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:43:05,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506603783] [2024-10-13 12:43:05,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506603783] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:43:05,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:43:05,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-13 12:43:05,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300298898] [2024-10-13 12:43:05,710 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:43:05,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 12:43:05,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:43:05,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 12:43:05,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-13 12:43:06,002 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-13 12:43:06,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 94 transitions, 528 flow. Second operand has 12 states, 12 states have (on average 20.5) internal successors, (246), 12 states have internal predecessors, (246), 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) [2024-10-13 12:43:06,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:43:06,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-13 12:43:06,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:43:11,283 INFO L124 PetriNetUnfolderBase]: 35459/46831 cut-off events. [2024-10-13 12:43:11,284 INFO L125 PetriNetUnfolderBase]: For 64758/73054 co-relation queries the response was YES. [2024-10-13 12:43:11,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142523 conditions, 46831 events. 35459/46831 cut-off events. For 64758/73054 co-relation queries the response was YES. Maximal size of possible extension queue 1442. Compared 292906 event pairs, 7483 based on Foata normal form. 9432/56101 useless extension candidates. Maximal degree in co-relation 142466. Up to 13545 conditions per place. [2024-10-13 12:43:11,623 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 271 selfloop transitions, 23 changer transitions 0/310 dead transitions. [2024-10-13 12:43:11,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 310 transitions, 2129 flow [2024-10-13 12:43:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 12:43:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 12:43:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 399 transitions. [2024-10-13 12:43:11,625 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48188405797101447 [2024-10-13 12:43:11,625 INFO L175 Difference]: Start difference. First operand has 106 places, 94 transitions, 528 flow. Second operand 12 states and 399 transitions. [2024-10-13 12:43:11,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 310 transitions, 2129 flow [2024-10-13 12:43:11,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 310 transitions, 1999 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-10-13 12:43:11,682 INFO L231 Difference]: Finished difference. Result has 118 places, 103 transitions, 615 flow [2024-10-13 12:43:11,683 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=615, PETRI_PLACES=118, PETRI_TRANSITIONS=103} [2024-10-13 12:43:11,683 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 45 predicate places. [2024-10-13 12:43:11,683 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 103 transitions, 615 flow [2024-10-13 12:43:11,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.5) internal successors, (246), 12 states have internal predecessors, (246), 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) [2024-10-13 12:43:11,683 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:43:11,683 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:43:11,686 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 [2024-10-13 12:43:11,883 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 [2024-10-13 12:43:11,884 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-13 12:43:11,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:43:11,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1029500400, now seen corresponding path program 1 times [2024-10-13 12:43:11,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:43:11,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691868285] [2024-10-13 12:43:11,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:43:11,885 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 [2024-10-13 12:43:11,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:43:11,886 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) [2024-10-13 12:43:11,887 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 [2024-10-13 12:43:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:43:11,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-13 12:43:11,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:43:11,944 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 [2024-10-13 12:43:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:43:12,110 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:43:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 12:43:12,399 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:43:12,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691868285] [2024-10-13 12:43:12,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691868285] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:43:12,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:43:12,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-13 12:43:12,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349027086] [2024-10-13 12:43:12,400 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:43:12,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-13 12:43:12,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:43:12,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-13 12:43:12,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-13 12:43:12,595 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 69 [2024-10-13 12:43:12,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 103 transitions, 615 flow. Second operand has 12 states, 12 states have (on average 19.333333333333332) internal successors, (232), 12 states have internal predecessors, (232), 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) [2024-10-13 12:43:12,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:43:12,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 69 [2024-10-13 12:43:12,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:43:22,774 INFO L124 PetriNetUnfolderBase]: 69817/92493 cut-off events. [2024-10-13 12:43:22,774 INFO L125 PetriNetUnfolderBase]: For 239934/257519 co-relation queries the response was YES. [2024-10-13 12:43:23,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310650 conditions, 92493 events. 69817/92493 cut-off events. For 239934/257519 co-relation queries the response was YES. Maximal size of possible extension queue 2176. Compared 588742 event pairs, 16851 based on Foata normal form. 17029/109230 useless extension candidates. Maximal degree in co-relation 310588. Up to 29157 conditions per place. [2024-10-13 12:43:23,698 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 333 selfloop transitions, 23 changer transitions 0/375 dead transitions. [2024-10-13 12:43:23,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 375 transitions, 2858 flow [2024-10-13 12:43:23,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-13 12:43:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-13 12:43:23,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 397 transitions. [2024-10-13 12:43:23,700 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47946859903381644 [2024-10-13 12:43:23,700 INFO L175 Difference]: Start difference. First operand has 118 places, 103 transitions, 615 flow. Second operand 12 states and 397 transitions. [2024-10-13 12:43:23,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 375 transitions, 2858 flow [2024-10-13 12:43:24,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 375 transitions, 2774 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-10-13 12:43:24,061 INFO L231 Difference]: Finished difference. Result has 130 places, 112 transitions, 703 flow [2024-10-13 12:43:24,061 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=703, PETRI_PLACES=130, PETRI_TRANSITIONS=112} [2024-10-13 12:43:24,062 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 57 predicate places. [2024-10-13 12:43:24,062 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 112 transitions, 703 flow [2024-10-13 12:43:24,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.333333333333332) internal successors, (232), 12 states have internal predecessors, (232), 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) [2024-10-13 12:43:24,062 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:43:24,062 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:43:24,070 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 [2024-10-13 12:43:24,263 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 [2024-10-13 12:43:24,263 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-13 12:43:24,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:43:24,264 INFO L85 PathProgramCache]: Analyzing trace with hash -995220546, now seen corresponding path program 2 times [2024-10-13 12:43:24,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-13 12:43:24,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635770109] [2024-10-13 12:43:24,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 12:43:24,265 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 [2024-10-13 12:43:24,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-13 12:43:24,266 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) [2024-10-13 12:43:24,267 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 [2024-10-13 12:43:24,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 12:43:24,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 12:43:24,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-13 12:43:24,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:43:24,348 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 [2024-10-13 12:43:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:43:24,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:43:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:43:25,472 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-13 12:43:25,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635770109] [2024-10-13 12:43:25,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635770109] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:43:25,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-13 12:43:25,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2024-10-13 12:43:25,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580850330] [2024-10-13 12:43:25,472 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-13 12:43:25,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-13 12:43:25,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-13 12:43:25,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-13 12:43:25,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-10-13 12:43:25,981 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-13 12:43:25,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 112 transitions, 703 flow. Second operand has 18 states, 18 states have (on average 19.77777777777778) internal successors, (356), 18 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:43:25,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:43:25,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-13 12:43:25,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand