./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/chl-array-int-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.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 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:47:37,824 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:47:37,880 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:47:37,884 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:47:37,885 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:47:37,906 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:47:37,909 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:47:37,909 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:47:37,910 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:47:37,912 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:47:37,913 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:47:37,913 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:47:37,913 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:47:37,913 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:47:37,913 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:47:37,914 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:47:37,914 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:47:37,914 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:47:37,914 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:47:37,914 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:47:37,914 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:47:37,916 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:47:37,916 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:47:37,917 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:47:37,917 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:47:37,917 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:47:37,918 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:47:37,918 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:47:37,918 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:47:37,918 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:47:37,918 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:47:37,919 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:47:37,919 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:47:37,919 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:47:37,919 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:47:37,919 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:47:37,919 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:47:37,920 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:47:37,920 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:47:37,920 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:47:37,920 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:47:37,921 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:47:37,921 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2024-10-14 19:47:38,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:47:38,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:47:38,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:47:38,133 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:47:38,134 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:47:38,134 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-10-14 19:47:39,489 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:47:39,664 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:47:39,664 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-10-14 19:47:39,671 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0063a8fb9/dc1a2a1f3da34c87b99efdd90b5f6f45/FLAG846be23b3 [2024-10-14 19:47:40,064 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0063a8fb9/dc1a2a1f3da34c87b99efdd90b5f6f45 [2024-10-14 19:47:40,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:47:40,067 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:47:40,068 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:47:40,068 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:47:40,072 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:47:40,073 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:47:40" (1/1) ... [2024-10-14 19:47:40,074 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40551cf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:47:40, skipping insertion in model container [2024-10-14 19:47:40,074 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:47:40" (1/1) ... [2024-10-14 19:47:40,091 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:47:40,331 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:47:40,348 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-10-14 19:47:40,349 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@9c0bde8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:47:40, skipping insertion in model container [2024-10-14 19:47:40,349 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:47:40,349 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-14 19:47:40,351 INFO L158 Benchmark]: Toolchain (without parser) took 282.71ms. Allocated memory is still 176.2MB. Free memory was 107.1MB in the beginning and 147.7MB in the end (delta: -40.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-14 19:47:40,351 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 100.7MB. Free memory is still 62.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 19:47:40,352 INFO L158 Benchmark]: CACSL2BoogieTranslator took 280.96ms. Allocated memory is still 176.2MB. Free memory was 106.8MB in the beginning and 147.7MB in the end (delta: -40.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-14 19:47:40,353 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 100.7MB. Free memory is still 62.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 280.96ms. Allocated memory is still 176.2MB. Free memory was 106.8MB in the beginning and 147.7MB in the end (delta: -40.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: 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/chl-array-int-symm.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 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:47:42,121 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:47:42,192 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-14 19:47:42,197 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:47:42,197 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:47:42,222 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:47:42,223 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:47:42,223 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:47:42,225 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:47:42,225 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:47:42,225 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:47:42,226 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:47:42,227 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:47:42,227 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:47:42,228 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:47:42,229 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:47:42,229 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:47:42,229 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:47:42,229 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:47:42,230 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:47:42,230 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:47:42,233 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:47:42,233 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:47:42,233 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:47:42,233 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:47:42,234 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-14 19:47:42,234 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:47:42,234 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-14 19:47:42,234 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:47:42,234 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:47:42,234 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:47:42,235 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:47:42,235 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:47:42,235 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:47:42,235 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:47:42,235 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:47:42,235 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:47:42,236 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:47:42,236 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-14 19:47:42,236 INFO L153 SettingsManager]: * Command for external solver=cvc5 --incremental --print-success --lang smt [2024-10-14 19:47:42,236 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:47:42,237 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:47:42,238 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:47:42,238 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:47:42,238 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-14 19:47:42,238 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a0558934008acf79b7e5b205fa256c568a1b783af274566f36b253458639325 [2024-10-14 19:47:42,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:47:42,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:47:42,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:47:42,554 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:47:42,554 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:47:42,556 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-10-14 19:47:43,989 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:47:44,189 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:47:44,189 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-array-int-symm.wvr.c [2024-10-14 19:47:44,202 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80eb79152/5c57bddc80854df7a009564401a86ee8/FLAG9c83294ba [2024-10-14 19:47:44,217 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80eb79152/5c57bddc80854df7a009564401a86ee8 [2024-10-14 19:47:44,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:47:44,220 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:47:44,222 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:47:44,223 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:47:44,228 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:47:44,229 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:47:44" (1/1) ... [2024-10-14 19:47:44,229 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5df7e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:47:44, skipping insertion in model container [2024-10-14 19:47:44,229 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:47:44" (1/1) ... [2024-10-14 19:47:44,253 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:47:44,444 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:47:44,458 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-14 19:47:44,461 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:47:44,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:47:44,481 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:47:44,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:47:44,513 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:47:44,513 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:47:44 WrapperNode [2024-10-14 19:47:44,513 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:47:44,514 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:47:44,514 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:47:44,514 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:47:44,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:47:44" (1/1) ... [2024-10-14 19:47:44,527 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:47:44" (1/1) ... [2024-10-14 19:47:44,546 INFO L138 Inliner]: procedures = 26, calls = 30, calls flagged for inlining = 14, calls inlined = 18, statements flattened = 189 [2024-10-14 19:47:44,547 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:47:44,547 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:47:44,547 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:47:44,548 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:47:44,560 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:47:44" (1/1) ... [2024-10-14 19:47:44,560 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:47:44" (1/1) ... [2024-10-14 19:47:44,563 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:47:44" (1/1) ... [2024-10-14 19:47:44,578 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]. [2024-10-14 19:47:44,578 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:47:44" (1/1) ... [2024-10-14 19:47:44,579 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:47:44" (1/1) ... [2024-10-14 19:47:44,592 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:47:44" (1/1) ... [2024-10-14 19:47:44,595 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:47:44" (1/1) ... [2024-10-14 19:47:44,597 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:47:44" (1/1) ... [2024-10-14 19:47:44,598 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:47:44" (1/1) ... [2024-10-14 19:47:44,600 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:47:44,601 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:47:44,601 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:47:44,602 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:47:44,602 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:47:44" (1/1) ... [2024-10-14 19:47:44,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:47:44,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:47:44,635 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 19:47:44,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 19:47:44,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:47:44,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-14 19:47:44,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-14 19:47:44,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-14 19:47:44,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-14 19:47:44,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 19:47:44,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 19:47:44,684 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 19:47:44,684 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 19:47:44,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 19:47:44,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:47:44,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:47:44,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-14 19:47:44,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-14 19:47:44,690 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 19:47:44,805 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:47:44,807 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:47:45,257 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:47:45,257 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:47:45,424 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:47:45,424 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-14 19:47:45,424 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:47:45 BoogieIcfgContainer [2024-10-14 19:47:45,424 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:47:45,426 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:47:45,426 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:47:45,428 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:47:45,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:47:44" (1/3) ... [2024-10-14 19:47:45,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a81ec88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:47:45, skipping insertion in model container [2024-10-14 19:47:45,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:47:44" (2/3) ... [2024-10-14 19:47:45,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a81ec88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:47:45, skipping insertion in model container [2024-10-14 19:47:45,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:47:45" (3/3) ... [2024-10-14 19:47:45,430 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-symm.wvr.c [2024-10-14 19:47:45,443 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:47:45,443 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-10-14 19:47:45,443 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:47:45,503 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 19:47:45,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 60 transitions, 134 flow [2024-10-14 19:47:45,546 INFO L124 PetriNetUnfolderBase]: 6/58 cut-off events. [2024-10-14 19:47:45,547 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 19:47:45,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 58 events. 6/58 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 162 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2024-10-14 19:47:45,549 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 60 transitions, 134 flow [2024-10-14 19:47:45,552 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 57 transitions, 126 flow [2024-10-14 19:47:45,558 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:47:45,565 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;@78df61b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:47:45,566 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-10-14 19:47:45,569 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:47:45,569 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-14 19:47:45,569 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:47:45,569 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:45,570 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:47:45,570 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:47:45,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:45,575 INFO L85 PathProgramCache]: Analyzing trace with hash 631374, now seen corresponding path program 1 times [2024-10-14 19:47:45,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:45,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379768680] [2024-10-14 19:47:45,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:47:45,589 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:45,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:45,591 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:45,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-14 19:47:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:47:45,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:47:45,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:45,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:47:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:47:45,708 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:47:45,708 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:45,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379768680] [2024-10-14 19:47:45,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379768680] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:47:45,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:47:45,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:47:45,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881568262] [2024-10-14 19:47:45,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:47:45,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:47:45,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:45,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:47:45,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:47:45,797 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-10-14 19:47:45,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:47:45,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:45,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-10-14 19:47:45,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:45,927 INFO L124 PetriNetUnfolderBase]: 116/323 cut-off events. [2024-10-14 19:47:45,927 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-14 19:47:45,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533 conditions, 323 events. 116/323 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1678 event pairs, 68 based on Foata normal form. 1/215 useless extension candidates. Maximal degree in co-relation 476. Up to 183 conditions per place. [2024-10-14 19:47:45,931 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 24 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2024-10-14 19:47:45,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 53 transitions, 170 flow [2024-10-14 19:47:45,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:47:45,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:47:45,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 119 transitions. [2024-10-14 19:47:45,945 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6611111111111111 [2024-10-14 19:47:45,946 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 126 flow. Second operand 3 states and 119 transitions. [2024-10-14 19:47:45,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 53 transitions, 170 flow [2024-10-14 19:47:45,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 162 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 19:47:45,951 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 114 flow [2024-10-14 19:47:45,952 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, 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=114, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2024-10-14 19:47:45,955 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -6 predicate places. [2024-10-14 19:47:45,955 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 114 flow [2024-10-14 19:47:45,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:47:45,955 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:45,956 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:47:45,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-10-14 19:47:46,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:46,158 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:47:46,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:46,159 INFO L85 PathProgramCache]: Analyzing trace with hash 631375, now seen corresponding path program 1 times [2024-10-14 19:47:46,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:46,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154233658] [2024-10-14 19:47:46,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:47:46,164 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:46,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:46,170 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:46,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-14 19:47:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:47:46,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:47:46,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:46,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:47:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:47:46,287 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:47:46,287 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:46,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154233658] [2024-10-14 19:47:46,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154233658] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:47:46,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:47:46,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:47:46,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219050599] [2024-10-14 19:47:46,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:47:46,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:47:46,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:46,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:47:46,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:47:46,475 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-10-14 19:47:46,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:47:46,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:46,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-10-14 19:47:46,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:46,682 INFO L124 PetriNetUnfolderBase]: 118/329 cut-off events. [2024-10-14 19:47:46,682 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-14 19:47:46,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 537 conditions, 329 events. 118/329 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1699 event pairs, 68 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 501. Up to 192 conditions per place. [2024-10-14 19:47:46,684 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 27 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-10-14 19:47:46,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 196 flow [2024-10-14 19:47:46,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:47:46,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:47:46,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 156 transitions. [2024-10-14 19:47:46,686 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-10-14 19:47:46,686 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 114 flow. Second operand 4 states and 156 transitions. [2024-10-14 19:47:46,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 196 flow [2024-10-14 19:47:46,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:47:46,688 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 166 flow [2024-10-14 19:47:46,688 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2024-10-14 19:47:46,688 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -2 predicate places. [2024-10-14 19:47:46,688 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 166 flow [2024-10-14 19:47:46,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:47:46,689 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:46,689 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-14 19:47:46,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-10-14 19:47:46,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:46,890 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:47:46,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:46,890 INFO L85 PathProgramCache]: Analyzing trace with hash 606771554, now seen corresponding path program 1 times [2024-10-14 19:47:46,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:46,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905700726] [2024-10-14 19:47:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:47:46,891 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:46,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:46,894 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:46,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-14 19:47:46,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:47:46,959 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 19:47:46,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:46,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:47:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:47:47,098 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:47:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:47:47,282 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:47,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905700726] [2024-10-14 19:47:47,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905700726] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:47:47,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:47:47,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:47:47,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749265713] [2024-10-14 19:47:47,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:47:47,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:47:47,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:47,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:47:47,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:47:48,105 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-10-14 19:47:48,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 166 flow. Second operand has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:47:48,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:48,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-10-14 19:47:48,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:48,980 INFO L124 PetriNetUnfolderBase]: 124/347 cut-off events. [2024-10-14 19:47:48,981 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-14 19:47:48,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 347 events. 124/347 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1816 event pairs, 68 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 512. Up to 195 conditions per place. [2024-10-14 19:47:48,983 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 27 selfloop transitions, 25 changer transitions 0/77 dead transitions. [2024-10-14 19:47:48,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 348 flow [2024-10-14 19:47:48,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 19:47:48,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 19:47:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 358 transitions. [2024-10-14 19:47:48,986 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5966666666666667 [2024-10-14 19:47:48,986 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 166 flow. Second operand 10 states and 358 transitions. [2024-10-14 19:47:48,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 348 flow [2024-10-14 19:47:48,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 348 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:47:48,989 INFO L231 Difference]: Finished difference. Result has 68 places, 77 transitions, 328 flow [2024-10-14 19:47:48,989 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=328, PETRI_PLACES=68, PETRI_TRANSITIONS=77} [2024-10-14 19:47:48,990 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 10 predicate places. [2024-10-14 19:47:48,990 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 77 transitions, 328 flow [2024-10-14 19:47:48,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:47:48,990 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:48,990 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:48,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-10-14 19:47:49,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:49,193 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:47:49,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:49,194 INFO L85 PathProgramCache]: Analyzing trace with hash -974384368, now seen corresponding path program 1 times [2024-10-14 19:47:49,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:49,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866943621] [2024-10-14 19:47:49,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:47:49,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:49,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:49,201 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:49,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-14 19:47:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:47:49,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:47:49,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:49,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:47:49,368 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:47:49,368 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:49,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866943621] [2024-10-14 19:47:49,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866943621] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:47:49,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:47:49,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:47:49,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717915394] [2024-10-14 19:47:49,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:47:49,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:47:49,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:49,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:47:49,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:47:49,433 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-14 19:47:49,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 77 transitions, 328 flow. Second operand has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:47:49,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:49,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-14 19:47:49,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:49,599 INFO L124 PetriNetUnfolderBase]: 218/579 cut-off events. [2024-10-14 19:47:49,599 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2024-10-14 19:47:49,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1109 conditions, 579 events. 218/579 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3371 event pairs, 87 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 1021. Up to 241 conditions per place. [2024-10-14 19:47:49,603 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 87 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2024-10-14 19:47:49,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 117 transitions, 667 flow [2024-10-14 19:47:49,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:47:49,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:47:49,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 214 transitions. [2024-10-14 19:47:49,606 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7133333333333334 [2024-10-14 19:47:49,606 INFO L175 Difference]: Start difference. First operand has 68 places, 77 transitions, 328 flow. Second operand 5 states and 214 transitions. [2024-10-14 19:47:49,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 117 transitions, 667 flow [2024-10-14 19:47:49,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 117 transitions, 573 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-10-14 19:47:49,610 INFO L231 Difference]: Finished difference. Result has 70 places, 78 transitions, 281 flow [2024-10-14 19:47:49,611 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=281, PETRI_PLACES=70, PETRI_TRANSITIONS=78} [2024-10-14 19:47:49,611 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2024-10-14 19:47:49,611 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 78 transitions, 281 flow [2024-10-14 19:47:49,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.2) internal successors, (161), 5 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:47:49,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:49,612 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:49,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-14 19:47:49,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:49,814 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:47:49,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:49,815 INFO L85 PathProgramCache]: Analyzing trace with hash -87652238, now seen corresponding path program 1 times [2024-10-14 19:47:49,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:49,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125976075] [2024-10-14 19:47:49,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:47:49,815 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:49,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:49,818 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:49,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-14 19:47:49,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:47:49,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:47:49,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:47:49,972 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:47:49,972 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:49,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125976075] [2024-10-14 19:47:49,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125976075] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:47:49,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:47:49,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:47:49,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911311932] [2024-10-14 19:47:49,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:47:49,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:47:49,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:49,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:47:49,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:47:50,036 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-14 19:47:50,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 78 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:47:50,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:50,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-14 19:47:50,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:50,206 INFO L124 PetriNetUnfolderBase]: 188/483 cut-off events. [2024-10-14 19:47:50,206 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-10-14 19:47:50,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 483 events. 188/483 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2567 event pairs, 91 based on Foata normal form. 0/351 useless extension candidates. Maximal degree in co-relation 888. Up to 239 conditions per place. [2024-10-14 19:47:50,209 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 80 selfloop transitions, 4 changer transitions 0/110 dead transitions. [2024-10-14 19:47:50,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 110 transitions, 564 flow [2024-10-14 19:47:50,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:47:50,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:47:50,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 207 transitions. [2024-10-14 19:47:50,211 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.69 [2024-10-14 19:47:50,211 INFO L175 Difference]: Start difference. First operand has 70 places, 78 transitions, 281 flow. Second operand 5 states and 207 transitions. [2024-10-14 19:47:50,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 110 transitions, 564 flow [2024-10-14 19:47:50,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 110 transitions, 560 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 19:47:50,214 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 294 flow [2024-10-14 19:47:50,214 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-10-14 19:47:50,215 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 17 predicate places. [2024-10-14 19:47:50,215 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 294 flow [2024-10-14 19:47:50,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:47:50,216 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:50,216 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:50,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-10-14 19:47:50,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:50,420 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:47:50,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:50,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1942309027, now seen corresponding path program 1 times [2024-10-14 19:47:50,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:50,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583004304] [2024-10-14 19:47:50,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:47:50,421 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:50,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:50,424 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:50,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-14 19:47:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:47:50,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:47:50,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:47:50,510 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:47:50,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:50,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583004304] [2024-10-14 19:47:50,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583004304] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:47:50,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:47:50,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 19:47:50,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808631726] [2024-10-14 19:47:50,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:47:50,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:47:50,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:50,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:47:50,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:47:50,551 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-14 19:47:50,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:47:50,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:50,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-14 19:47:50,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:50,723 INFO L124 PetriNetUnfolderBase]: 300/779 cut-off events. [2024-10-14 19:47:50,723 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-10-14 19:47:50,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 779 events. 300/779 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4703 event pairs, 132 based on Foata normal form. 12/616 useless extension candidates. Maximal degree in co-relation 1524. Up to 338 conditions per place. [2024-10-14 19:47:50,726 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 72 selfloop transitions, 9 changer transitions 0/107 dead transitions. [2024-10-14 19:47:50,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 107 transitions, 535 flow [2024-10-14 19:47:50,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:47:50,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:47:50,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 211 transitions. [2024-10-14 19:47:50,728 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7033333333333334 [2024-10-14 19:47:50,728 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 294 flow. Second operand 5 states and 211 transitions. [2024-10-14 19:47:50,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 107 transitions, 535 flow [2024-10-14 19:47:50,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 107 transitions, 522 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:47:50,731 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 320 flow [2024-10-14 19:47:50,731 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-10-14 19:47:50,731 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2024-10-14 19:47:50,731 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 320 flow [2024-10-14 19:47:50,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:47:50,732 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:50,732 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:50,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2024-10-14 19:47:50,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:50,934 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:47:50,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:50,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1758943930, now seen corresponding path program 1 times [2024-10-14 19:47:50,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:50,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648196877] [2024-10-14 19:47:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:47:50,935 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:50,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:50,936 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:50,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-14 19:47:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:47:50,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:47:50,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:47:51,037 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:47:51,037 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:51,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648196877] [2024-10-14 19:47:51,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648196877] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:47:51,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:47:51,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 19:47:51,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859266600] [2024-10-14 19:47:51,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:47:51,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:47:51,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:51,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:47:51,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:47:51,078 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-14 19:47:51,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:47:51,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:51,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-14 19:47:51,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:51,210 INFO L124 PetriNetUnfolderBase]: 270/685 cut-off events. [2024-10-14 19:47:51,210 INFO L125 PetriNetUnfolderBase]: For 353/353 co-relation queries the response was YES. [2024-10-14 19:47:51,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1527 conditions, 685 events. 270/685 cut-off events. For 353/353 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3815 event pairs, 142 based on Foata normal form. 9/557 useless extension candidates. Maximal degree in co-relation 1446. Up to 336 conditions per place. [2024-10-14 19:47:51,213 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 65 selfloop transitions, 9 changer transitions 0/100 dead transitions. [2024-10-14 19:47:51,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 100 transitions, 531 flow [2024-10-14 19:47:51,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:47:51,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:47:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 204 transitions. [2024-10-14 19:47:51,215 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-10-14 19:47:51,215 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 320 flow. Second operand 5 states and 204 transitions. [2024-10-14 19:47:51,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 100 transitions, 531 flow [2024-10-14 19:47:51,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 100 transitions, 525 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:47:51,217 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 353 flow [2024-10-14 19:47:51,217 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=353, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2024-10-14 19:47:51,218 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 25 predicate places. [2024-10-14 19:47:51,218 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 353 flow [2024-10-14 19:47:51,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 5 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:47:51,218 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:51,218 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:51,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-14 19:47:51,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:51,421 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:47:51,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:51,422 INFO L85 PathProgramCache]: Analyzing trace with hash -219840755, now seen corresponding path program 1 times [2024-10-14 19:47:51,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:51,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1534849217] [2024-10-14 19:47:51,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:47:51,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:51,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:51,424 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:51,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-14 19:47:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:47:51,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 19:47:51,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:51,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:47:51,540 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-14 19:47:51,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-10-14 19:47:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:47:51,556 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:47:51,556 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:51,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1534849217] [2024-10-14 19:47:51,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1534849217] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:47:51,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:47:51,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:47:51,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813225336] [2024-10-14 19:47:51,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:47:51,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:47:51,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:51,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:47:51,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:47:51,616 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-10-14 19:47:51,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 353 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:47:51,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:51,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-10-14 19:47:51,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:51,729 INFO L124 PetriNetUnfolderBase]: 314/759 cut-off events. [2024-10-14 19:47:51,730 INFO L125 PetriNetUnfolderBase]: For 531/531 co-relation queries the response was YES. [2024-10-14 19:47:51,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1761 conditions, 759 events. 314/759 cut-off events. For 531/531 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4229 event pairs, 244 based on Foata normal form. 0/651 useless extension candidates. Maximal degree in co-relation 1677. Up to 556 conditions per place. [2024-10-14 19:47:51,733 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 48 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-10-14 19:47:51,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 79 transitions, 463 flow [2024-10-14 19:47:51,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:47:51,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:47:51,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-10-14 19:47:51,735 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-10-14 19:47:51,735 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 353 flow. Second operand 5 states and 148 transitions. [2024-10-14 19:47:51,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 79 transitions, 463 flow [2024-10-14 19:47:51,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 450 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:47:51,737 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 354 flow [2024-10-14 19:47:51,738 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=354, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-10-14 19:47:51,738 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 23 predicate places. [2024-10-14 19:47:51,738 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 354 flow [2024-10-14 19:47:51,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:47:51,739 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:51,739 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:47:51,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2024-10-14 19:47:51,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:51,940 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:47:51,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:51,940 INFO L85 PathProgramCache]: Analyzing trace with hash -219840754, now seen corresponding path program 1 times [2024-10-14 19:47:51,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:51,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006582127] [2024-10-14 19:47:51,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:47:51,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:51,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:51,943 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:51,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-14 19:47:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:47:52,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 19:47:52,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:52,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:47:52,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:47:52,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:47:52,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 19:47:52,164 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:47:52,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-14 19:47:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:47:52,300 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:47:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:47:52,672 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:52,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006582127] [2024-10-14 19:47:52,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006582127] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:47:52,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:47:52,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-14 19:47:52,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548668386] [2024-10-14 19:47:52,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:47:52,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 19:47:52,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:52,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 19:47:52,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-14 19:47:54,340 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-14 19:47:54,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 354 flow. Second operand has 12 states, 12 states have (on average 25.666666666666668) internal successors, (308), 12 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:47:54,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:54,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-14 19:47:54,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:47:56,066 INFO L124 PetriNetUnfolderBase]: 1000/2302 cut-off events. [2024-10-14 19:47:56,066 INFO L125 PetriNetUnfolderBase]: For 1053/1053 co-relation queries the response was YES. [2024-10-14 19:47:56,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4983 conditions, 2302 events. 1000/2302 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16331 event pairs, 336 based on Foata normal form. 0/1853 useless extension candidates. Maximal degree in co-relation 3609. Up to 450 conditions per place. [2024-10-14 19:47:56,077 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 147 selfloop transitions, 56 changer transitions 0/220 dead transitions. [2024-10-14 19:47:56,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 220 transitions, 1258 flow [2024-10-14 19:47:56,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-14 19:47:56,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-14 19:47:56,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 745 transitions. [2024-10-14 19:47:56,080 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5398550724637681 [2024-10-14 19:47:56,080 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 354 flow. Second operand 23 states and 745 transitions. [2024-10-14 19:47:56,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 220 transitions, 1258 flow [2024-10-14 19:47:56,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 220 transitions, 1231 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:47:56,086 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 630 flow [2024-10-14 19:47:56,086 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=630, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-10-14 19:47:56,087 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 43 predicate places. [2024-10-14 19:47:56,087 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 630 flow [2024-10-14 19:47:56,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 25.666666666666668) internal successors, (308), 12 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:47:56,087 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:47:56,087 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-14 19:47:56,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-10-14 19:47:56,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:56,291 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:47:56,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:47:56,292 INFO L85 PathProgramCache]: Analyzing trace with hash 237333019, now seen corresponding path program 2 times [2024-10-14 19:47:56,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:47:56,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237651516] [2024-10-14 19:47:56,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:47:56,292 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:47:56,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:47:56,295 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:47:56,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-14 19:47:56,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:47:56,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:47:56,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 19:47:56,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:47:56,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:47:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:47:56,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:47:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:47:56,930 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:47:56,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237651516] [2024-10-14 19:47:56,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237651516] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:47:56,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:47:56,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:47:56,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908680980] [2024-10-14 19:47:56,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:47:56,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:47:56,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:47:56,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:47:56,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:47:58,467 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 60 [2024-10-14 19:47:58,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 630 flow. Second operand has 14 states, 14 states have (on average 31.571428571428573) internal successors, (442), 14 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:47:58,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:47:58,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 60 [2024-10-14 19:47:58,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:48:00,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:48:01,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:48:08,118 INFO L124 PetriNetUnfolderBase]: 821/2103 cut-off events. [2024-10-14 19:48:08,118 INFO L125 PetriNetUnfolderBase]: For 1696/1698 co-relation queries the response was YES. [2024-10-14 19:48:08,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4998 conditions, 2103 events. 821/2103 cut-off events. For 1696/1698 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15533 event pairs, 595 based on Foata normal form. 30/1791 useless extension candidates. Maximal degree in co-relation 3878. Up to 1417 conditions per place. [2024-10-14 19:48:08,144 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 44 selfloop transitions, 103 changer transitions 0/171 dead transitions. [2024-10-14 19:48:08,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 171 transitions, 1332 flow [2024-10-14 19:48:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 19:48:08,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-14 19:48:08,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 760 transitions. [2024-10-14 19:48:08,147 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-10-14 19:48:08,147 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 630 flow. Second operand 22 states and 760 transitions. [2024-10-14 19:48:08,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 171 transitions, 1332 flow [2024-10-14 19:48:08,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 171 transitions, 1298 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-10-14 19:48:08,156 INFO L231 Difference]: Finished difference. Result has 126 places, 171 transitions, 1300 flow [2024-10-14 19:48:08,157 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1300, PETRI_PLACES=126, PETRI_TRANSITIONS=171} [2024-10-14 19:48:08,158 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 68 predicate places. [2024-10-14 19:48:08,158 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 171 transitions, 1300 flow [2024-10-14 19:48:08,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 31.571428571428573) internal successors, (442), 14 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:08,159 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:48:08,159 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:48:08,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-10-14 19:48:08,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:08,363 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:48:08,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:48:08,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1774871804, now seen corresponding path program 1 times [2024-10-14 19:48:08,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:48:08,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013540980] [2024-10-14 19:48:08,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:48:08,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:08,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:48:08,367 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:48:08,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-14 19:48:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:48:08,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 19:48:08,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:48:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:48:08,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:48:08,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2024-10-14 19:48:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:48:08,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:48:08,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013540980] [2024-10-14 19:48:08,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013540980] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:48:08,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:48:08,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-14 19:48:08,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324968738] [2024-10-14 19:48:08,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:48:08,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:48:08,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:48:08,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:48:08,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:48:09,540 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-10-14 19:48:09,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 171 transitions, 1300 flow. Second operand has 10 states, 10 states have (on average 30.7) internal successors, (307), 10 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:09,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:48:09,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-10-14 19:48:09,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:48:10,309 INFO L124 PetriNetUnfolderBase]: 1181/2671 cut-off events. [2024-10-14 19:48:10,309 INFO L125 PetriNetUnfolderBase]: For 1578/1578 co-relation queries the response was YES. [2024-10-14 19:48:10,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6487 conditions, 2671 events. 1181/2671 cut-off events. For 1578/1578 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 18638 event pairs, 380 based on Foata normal form. 0/2405 useless extension candidates. Maximal degree in co-relation 6267. Up to 678 conditions per place. [2024-10-14 19:48:10,320 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 142 selfloop transitions, 49 changer transitions 0/214 dead transitions. [2024-10-14 19:48:10,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 214 transitions, 1797 flow [2024-10-14 19:48:10,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 19:48:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-14 19:48:10,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 319 transitions. [2024-10-14 19:48:10,322 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6645833333333333 [2024-10-14 19:48:10,322 INFO L175 Difference]: Start difference. First operand has 126 places, 171 transitions, 1300 flow. Second operand 8 states and 319 transitions. [2024-10-14 19:48:10,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 214 transitions, 1797 flow [2024-10-14 19:48:10,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 214 transitions, 1525 flow, removed 87 selfloop flow, removed 9 redundant places. [2024-10-14 19:48:10,330 INFO L231 Difference]: Finished difference. Result has 125 places, 173 transitions, 1173 flow [2024-10-14 19:48:10,330 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1173, PETRI_PLACES=125, PETRI_TRANSITIONS=173} [2024-10-14 19:48:10,331 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 67 predicate places. [2024-10-14 19:48:10,331 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 173 transitions, 1173 flow [2024-10-14 19:48:10,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.7) internal successors, (307), 10 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:10,331 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:48:10,331 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:48:10,334 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 (12)] Forceful destruction successful, exit code 0 [2024-10-14 19:48:10,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:10,532 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:48:10,532 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:48:10,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1774871803, now seen corresponding path program 1 times [2024-10-14 19:48:10,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:48:10,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501879034] [2024-10-14 19:48:10,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:48:10,533 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:10,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:48:10,535 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:48:10,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-14 19:48:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:48:10,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 19:48:10,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:48:10,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:48:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:48:10,613 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:48:10,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:48:10,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501879034] [2024-10-14 19:48:10,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501879034] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:48:10,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:48:10,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:48:10,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126914083] [2024-10-14 19:48:10,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:48:10,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:48:10,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:48:10,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:48:10,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:48:10,679 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-10-14 19:48:10,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 173 transitions, 1173 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:10,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:48:10,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-10-14 19:48:10,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:48:10,922 INFO L124 PetriNetUnfolderBase]: 1398/3040 cut-off events. [2024-10-14 19:48:10,922 INFO L125 PetriNetUnfolderBase]: For 2578/2578 co-relation queries the response was YES. [2024-10-14 19:48:10,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7661 conditions, 3040 events. 1398/3040 cut-off events. For 2578/2578 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 20925 event pairs, 1086 based on Foata normal form. 82/2976 useless extension candidates. Maximal degree in co-relation 7464. Up to 2370 conditions per place. [2024-10-14 19:48:10,935 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 131 selfloop transitions, 20 changer transitions 0/169 dead transitions. [2024-10-14 19:48:10,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 169 transitions, 1467 flow [2024-10-14 19:48:10,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:48:10,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:48:10,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-10-14 19:48:10,937 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-10-14 19:48:10,937 INFO L175 Difference]: Start difference. First operand has 125 places, 173 transitions, 1173 flow. Second operand 4 states and 125 transitions. [2024-10-14 19:48:10,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 169 transitions, 1467 flow [2024-10-14 19:48:10,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 169 transitions, 1418 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-14 19:48:10,979 INFO L231 Difference]: Finished difference. Result has 120 places, 169 transitions, 1156 flow [2024-10-14 19:48:10,979 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1156, PETRI_PLACES=120, PETRI_TRANSITIONS=169} [2024-10-14 19:48:10,981 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 62 predicate places. [2024-10-14 19:48:10,981 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 169 transitions, 1156 flow [2024-10-14 19:48:10,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:10,982 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:48:10,982 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:48:10,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2024-10-14 19:48:11,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:11,185 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:48:11,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:48:11,186 INFO L85 PathProgramCache]: Analyzing trace with hash -820713168, now seen corresponding path program 1 times [2024-10-14 19:48:11,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:48:11,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475629743] [2024-10-14 19:48:11,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:48:11,186 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:11,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:48:11,188 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:48:11,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-14 19:48:11,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:48:11,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 19:48:11,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:48:11,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:48:11,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:48:11,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:48:11,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 19:48:11,382 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:48:11,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-14 19:48:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:48:11,492 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:48:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:48:11,827 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:48:11,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475629743] [2024-10-14 19:48:11,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475629743] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:48:11,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:48:11,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-14 19:48:11,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101906267] [2024-10-14 19:48:11,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:48:11,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 19:48:11,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:48:11,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 19:48:11,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-14 19:48:13,463 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-10-14 19:48:13,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 169 transitions, 1156 flow. Second operand has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:13,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:48:13,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-10-14 19:48:13,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:48:15,405 INFO L124 PetriNetUnfolderBase]: 1684/3709 cut-off events. [2024-10-14 19:48:15,406 INFO L125 PetriNetUnfolderBase]: For 2993/3075 co-relation queries the response was YES. [2024-10-14 19:48:15,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8855 conditions, 3709 events. 1684/3709 cut-off events. For 2993/3075 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 27445 event pairs, 676 based on Foata normal form. 0/3264 useless extension candidates. Maximal degree in co-relation 8651. Up to 737 conditions per place. [2024-10-14 19:48:15,419 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 160 selfloop transitions, 110 changer transitions 0/287 dead transitions. [2024-10-14 19:48:15,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 287 transitions, 2227 flow [2024-10-14 19:48:15,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-14 19:48:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-14 19:48:15,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 756 transitions. [2024-10-14 19:48:15,422 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5478260869565217 [2024-10-14 19:48:15,422 INFO L175 Difference]: Start difference. First operand has 120 places, 169 transitions, 1156 flow. Second operand 23 states and 756 transitions. [2024-10-14 19:48:15,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 287 transitions, 2227 flow [2024-10-14 19:48:15,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 287 transitions, 2192 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:48:15,435 INFO L231 Difference]: Finished difference. Result has 141 places, 179 transitions, 1414 flow [2024-10-14 19:48:15,435 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1414, PETRI_PLACES=141, PETRI_TRANSITIONS=179} [2024-10-14 19:48:15,436 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 83 predicate places. [2024-10-14 19:48:15,436 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 179 transitions, 1414 flow [2024-10-14 19:48:15,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 27.0) internal successors, (324), 12 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:15,436 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:48:15,436 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:48:15,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2024-10-14 19:48:15,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:15,637 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:48:15,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:48:15,637 INFO L85 PathProgramCache]: Analyzing trace with hash 327696172, now seen corresponding path program 1 times [2024-10-14 19:48:15,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:48:15,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713272380] [2024-10-14 19:48:15,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:48:15,638 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:15,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:48:15,639 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:48:15,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-10-14 19:48:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:48:15,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 19:48:15,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:48:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:48:15,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:48:15,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2024-10-14 19:48:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:48:15,920 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:48:15,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713272380] [2024-10-14 19:48:15,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713272380] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:48:15,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:48:15,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-14 19:48:15,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003994089] [2024-10-14 19:48:15,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:48:15,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:48:15,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:48:15,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:48:15,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:48:16,545 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-10-14 19:48:16,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 179 transitions, 1414 flow. Second operand has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:16,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:48:16,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-10-14 19:48:16,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:48:17,552 INFO L124 PetriNetUnfolderBase]: 2375/4771 cut-off events. [2024-10-14 19:48:17,552 INFO L125 PetriNetUnfolderBase]: For 4578/4712 co-relation queries the response was YES. [2024-10-14 19:48:17,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12300 conditions, 4771 events. 2375/4771 cut-off events. For 4578/4712 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 34144 event pairs, 709 based on Foata normal form. 0/4651 useless extension candidates. Maximal degree in co-relation 12078. Up to 1480 conditions per place. [2024-10-14 19:48:17,570 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 163 selfloop transitions, 49 changer transitions 0/233 dead transitions. [2024-10-14 19:48:17,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 233 transitions, 2083 flow [2024-10-14 19:48:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 19:48:17,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-14 19:48:17,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 309 transitions. [2024-10-14 19:48:17,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-10-14 19:48:17,575 INFO L175 Difference]: Start difference. First operand has 141 places, 179 transitions, 1414 flow. Second operand 8 states and 309 transitions. [2024-10-14 19:48:17,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 233 transitions, 2083 flow [2024-10-14 19:48:17,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 233 transitions, 1957 flow, removed 4 selfloop flow, removed 15 redundant places. [2024-10-14 19:48:17,586 INFO L231 Difference]: Finished difference. Result has 134 places, 181 transitions, 1433 flow [2024-10-14 19:48:17,586 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1433, PETRI_PLACES=134, PETRI_TRANSITIONS=181} [2024-10-14 19:48:17,586 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 76 predicate places. [2024-10-14 19:48:17,587 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 181 transitions, 1433 flow [2024-10-14 19:48:17,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:17,587 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:48:17,587 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:48:17,593 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 (15)] Ended with exit code 0 [2024-10-14 19:48:17,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:17,788 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:48:17,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:48:17,788 INFO L85 PathProgramCache]: Analyzing trace with hash -135882540, now seen corresponding path program 1 times [2024-10-14 19:48:17,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:48:17,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126912465] [2024-10-14 19:48:17,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:48:17,789 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:17,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:48:17,791 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:48:17,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-10-14 19:48:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:48:17,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 19:48:17,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:48:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:48:17,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:48:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:48:18,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:48:18,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126912465] [2024-10-14 19:48:18,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126912465] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:48:18,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:48:18,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-14 19:48:18,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829874620] [2024-10-14 19:48:18,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:48:18,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:48:18,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:48:18,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:48:18,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:48:18,411 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-14 19:48:18,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 181 transitions, 1433 flow. Second operand has 14 states, 14 states have (on average 32.714285714285715) internal successors, (458), 14 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:18,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:48:18,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-14 19:48:18,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:48:19,211 INFO L124 PetriNetUnfolderBase]: 1826/4126 cut-off events. [2024-10-14 19:48:19,212 INFO L125 PetriNetUnfolderBase]: For 5171/5259 co-relation queries the response was YES. [2024-10-14 19:48:19,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11183 conditions, 4126 events. 1826/4126 cut-off events. For 5171/5259 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 30860 event pairs, 1145 based on Foata normal form. 24/4080 useless extension candidates. Maximal degree in co-relation 10964. Up to 2317 conditions per place. [2024-10-14 19:48:19,232 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 189 selfloop transitions, 70 changer transitions 0/282 dead transitions. [2024-10-14 19:48:19,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 282 transitions, 2551 flow [2024-10-14 19:48:19,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 19:48:19,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 19:48:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 443 transitions. [2024-10-14 19:48:19,236 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6712121212121213 [2024-10-14 19:48:19,236 INFO L175 Difference]: Start difference. First operand has 134 places, 181 transitions, 1433 flow. Second operand 11 states and 443 transitions. [2024-10-14 19:48:19,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 282 transitions, 2551 flow [2024-10-14 19:48:19,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 282 transitions, 2444 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-10-14 19:48:19,253 INFO L231 Difference]: Finished difference. Result has 141 places, 201 transitions, 1816 flow [2024-10-14 19:48:19,253 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1816, PETRI_PLACES=141, PETRI_TRANSITIONS=201} [2024-10-14 19:48:19,253 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 83 predicate places. [2024-10-14 19:48:19,254 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 201 transitions, 1816 flow [2024-10-14 19:48:19,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 32.714285714285715) internal successors, (458), 14 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:19,254 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:48:19,254 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:48:19,258 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 (16)] Ended with exit code 0 [2024-10-14 19:48:19,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:19,455 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:48:19,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:48:19,455 INFO L85 PathProgramCache]: Analyzing trace with hash -63400330, now seen corresponding path program 1 times [2024-10-14 19:48:19,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:48:19,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085137209] [2024-10-14 19:48:19,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:48:19,456 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:19,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:48:19,458 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:48:19,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-10-14 19:48:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:48:19,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 19:48:19,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:48:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:48:19,646 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:48:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:48:19,745 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:48:19,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085137209] [2024-10-14 19:48:19,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085137209] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:48:19,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:48:19,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-14 19:48:19,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853584304] [2024-10-14 19:48:19,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:48:19,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:48:19,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:48:19,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:48:19,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:48:20,061 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-14 19:48:20,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 201 transitions, 1816 flow. Second operand has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:20,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:48:20,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-14 19:48:20,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:48:20,951 INFO L124 PetriNetUnfolderBase]: 1725/3757 cut-off events. [2024-10-14 19:48:20,951 INFO L125 PetriNetUnfolderBase]: For 4647/4739 co-relation queries the response was YES. [2024-10-14 19:48:20,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10343 conditions, 3757 events. 1725/3757 cut-off events. For 4647/4739 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 26795 event pairs, 1180 based on Foata normal form. 18/3696 useless extension candidates. Maximal degree in co-relation 10096. Up to 2329 conditions per place. [2024-10-14 19:48:20,965 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 182 selfloop transitions, 70 changer transitions 0/274 dead transitions. [2024-10-14 19:48:20,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 274 transitions, 2725 flow [2024-10-14 19:48:20,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 19:48:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 19:48:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 439 transitions. [2024-10-14 19:48:20,969 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6651515151515152 [2024-10-14 19:48:20,969 INFO L175 Difference]: Start difference. First operand has 141 places, 201 transitions, 1816 flow. Second operand 11 states and 439 transitions. [2024-10-14 19:48:20,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 274 transitions, 2725 flow [2024-10-14 19:48:20,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 274 transitions, 2709 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:48:20,983 INFO L231 Difference]: Finished difference. Result has 148 places, 199 transitions, 1939 flow [2024-10-14 19:48:20,983 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1939, PETRI_PLACES=148, PETRI_TRANSITIONS=199} [2024-10-14 19:48:20,984 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 90 predicate places. [2024-10-14 19:48:20,984 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 199 transitions, 1939 flow [2024-10-14 19:48:20,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 33.0) internal successors, (462), 14 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:20,985 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:48:20,985 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:48:20,992 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 (17)] Ended with exit code 0 [2024-10-14 19:48:21,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:21,189 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:48:21,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:48:21,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1414938719, now seen corresponding path program 1 times [2024-10-14 19:48:21,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:48:21,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100713354] [2024-10-14 19:48:21,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:48:21,190 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:21,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:48:21,191 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:48:21,192 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 (18)] Waiting until timeout for monitored process [2024-10-14 19:48:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:48:21,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-14 19:48:21,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:48:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:48:21,457 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:48:21,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:48:21,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100713354] [2024-10-14 19:48:21,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100713354] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:48:21,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:48:21,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 19:48:21,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618166192] [2024-10-14 19:48:21,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:48:21,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 19:48:21,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:48:21,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 19:48:21,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-14 19:48:21,556 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 60 [2024-10-14 19:48:21,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 199 transitions, 1939 flow. Second operand has 7 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:21,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:48:21,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 60 [2024-10-14 19:48:21,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:48:22,249 INFO L124 PetriNetUnfolderBase]: 1537/3597 cut-off events. [2024-10-14 19:48:22,250 INFO L125 PetriNetUnfolderBase]: For 4809/4891 co-relation queries the response was YES. [2024-10-14 19:48:22,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10036 conditions, 3597 events. 1537/3597 cut-off events. For 4809/4891 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 26690 event pairs, 722 based on Foata normal form. 1/3546 useless extension candidates. Maximal degree in co-relation 9775. Up to 2535 conditions per place. [2024-10-14 19:48:22,270 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 173 selfloop transitions, 18 changer transitions 13/227 dead transitions. [2024-10-14 19:48:22,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 227 transitions, 2524 flow [2024-10-14 19:48:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 19:48:22,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 19:48:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 242 transitions. [2024-10-14 19:48:22,271 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6722222222222223 [2024-10-14 19:48:22,272 INFO L175 Difference]: Start difference. First operand has 148 places, 199 transitions, 1939 flow. Second operand 6 states and 242 transitions. [2024-10-14 19:48:22,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 227 transitions, 2524 flow [2024-10-14 19:48:22,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 227 transitions, 2387 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-14 19:48:22,287 INFO L231 Difference]: Finished difference. Result has 149 places, 211 transitions, 2003 flow [2024-10-14 19:48:22,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1805, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2003, PETRI_PLACES=149, PETRI_TRANSITIONS=211} [2024-10-14 19:48:22,288 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 91 predicate places. [2024-10-14 19:48:22,288 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 211 transitions, 2003 flow [2024-10-14 19:48:22,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.285714285714285) internal successors, (240), 7 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:22,289 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:48:22,289 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:48:22,297 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 (18)] Ended with exit code 0 [2024-10-14 19:48:22,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:22,490 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:48:22,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:48:22,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1139089671, now seen corresponding path program 2 times [2024-10-14 19:48:22,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:48:22,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408626562] [2024-10-14 19:48:22,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:48:22,491 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:22,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:48:22,492 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:48:22,494 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 (19)] Waiting until timeout for monitored process [2024-10-14 19:48:22,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 19:48:22,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:48:22,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-14 19:48:22,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:48:22,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:48:22,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:48:22,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:48:22,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 19:48:22,690 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:48:22,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-14 19:48:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-14 19:48:22,773 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:48:22,773 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:48:22,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408626562] [2024-10-14 19:48:22,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408626562] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:48:22,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:48:22,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:48:22,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094433358] [2024-10-14 19:48:22,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:48:22,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 19:48:22,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:48:22,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 19:48:22,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-14 19:48:23,065 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-14 19:48:23,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 211 transitions, 2003 flow. Second operand has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:23,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:48:23,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-14 19:48:23,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:48:23,858 INFO L124 PetriNetUnfolderBase]: 2717/5452 cut-off events. [2024-10-14 19:48:23,859 INFO L125 PetriNetUnfolderBase]: For 8218/8327 co-relation queries the response was YES. [2024-10-14 19:48:23,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15469 conditions, 5452 events. 2717/5452 cut-off events. For 8218/8327 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 39156 event pairs, 1138 based on Foata normal form. 32/5462 useless extension candidates. Maximal degree in co-relation 15268. Up to 2187 conditions per place. [2024-10-14 19:48:23,885 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 218 selfloop transitions, 35 changer transitions 0/265 dead transitions. [2024-10-14 19:48:23,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 265 transitions, 2783 flow [2024-10-14 19:48:23,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 19:48:23,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 19:48:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2024-10-14 19:48:23,887 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-10-14 19:48:23,887 INFO L175 Difference]: Start difference. First operand has 149 places, 211 transitions, 2003 flow. Second operand 6 states and 213 transitions. [2024-10-14 19:48:23,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 265 transitions, 2783 flow [2024-10-14 19:48:23,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 265 transitions, 2749 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-10-14 19:48:23,901 INFO L231 Difference]: Finished difference. Result has 152 places, 217 transitions, 2113 flow [2024-10-14 19:48:23,901 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1973, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2113, PETRI_PLACES=152, PETRI_TRANSITIONS=217} [2024-10-14 19:48:23,901 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 94 predicate places. [2024-10-14 19:48:23,901 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 217 transitions, 2113 flow [2024-10-14 19:48:23,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.833333333333332) internal successors, (155), 6 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:23,902 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:48:23,902 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:48:23,905 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 (19)] Ended with exit code 0 [2024-10-14 19:48:24,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:24,102 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:48:24,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:48:24,103 INFO L85 PathProgramCache]: Analyzing trace with hash 184978279, now seen corresponding path program 2 times [2024-10-14 19:48:24,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:48:24,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978761564] [2024-10-14 19:48:24,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:48:24,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:24,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:48:24,106 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:48:24,110 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 (20)] Waiting until timeout for monitored process [2024-10-14 19:48:24,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:48:24,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:48:24,186 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 19:48:24,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:48:24,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:48:24,206 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 1 [2024-10-14 19:48:24,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:48:24,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-14 19:48:24,311 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:48:24,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-14 19:48:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:48:24,439 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:48:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:48:24,998 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:48:24,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978761564] [2024-10-14 19:48:24,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978761564] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:48:24,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:48:24,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:48:24,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31453996] [2024-10-14 19:48:24,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:48:24,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:48:24,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:48:25,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:48:25,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:48:27,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 19:48:31,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 19:48:37,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 19:48:37,370 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-14 19:48:37,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 217 transitions, 2113 flow. Second operand has 14 states, 14 states have (on average 24.0) internal successors, (336), 14 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:37,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:48:37,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-14 19:48:37,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:48:39,480 INFO L124 PetriNetUnfolderBase]: 3232/6538 cut-off events. [2024-10-14 19:48:39,481 INFO L125 PetriNetUnfolderBase]: For 12334/12566 co-relation queries the response was YES. [2024-10-14 19:48:39,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18925 conditions, 6538 events. 3232/6538 cut-off events. For 12334/12566 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 49079 event pairs, 869 based on Foata normal form. 62/6465 useless extension candidates. Maximal degree in co-relation 18666. Up to 1617 conditions per place. [2024-10-14 19:48:39,515 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 236 selfloop transitions, 68 changer transitions 0/323 dead transitions. [2024-10-14 19:48:39,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 323 transitions, 3249 flow [2024-10-14 19:48:39,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 19:48:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-14 19:48:39,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 427 transitions. [2024-10-14 19:48:39,517 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5474358974358975 [2024-10-14 19:48:39,517 INFO L175 Difference]: Start difference. First operand has 152 places, 217 transitions, 2113 flow. Second operand 13 states and 427 transitions. [2024-10-14 19:48:39,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 323 transitions, 3249 flow [2024-10-14 19:48:39,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 323 transitions, 3191 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-10-14 19:48:39,545 INFO L231 Difference]: Finished difference. Result has 162 places, 231 transitions, 2372 flow [2024-10-14 19:48:39,545 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2372, PETRI_PLACES=162, PETRI_TRANSITIONS=231} [2024-10-14 19:48:39,546 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 104 predicate places. [2024-10-14 19:48:39,546 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 231 transitions, 2372 flow [2024-10-14 19:48:39,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 24.0) internal successors, (336), 14 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:39,546 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:48:39,546 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:48:39,551 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 (20)] Forceful destruction successful, exit code 0 [2024-10-14 19:48:39,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:39,750 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:48:39,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:48:39,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1439359939, now seen corresponding path program 1 times [2024-10-14 19:48:39,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:48:39,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226874662] [2024-10-14 19:48:39,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:48:39,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:39,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:48:39,754 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:48:39,755 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 (21)] Waiting until timeout for monitored process [2024-10-14 19:48:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:48:39,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-14 19:48:39,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:48:39,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:48:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 19:48:40,052 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:48:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 19:48:40,445 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:48:40,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226874662] [2024-10-14 19:48:40,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226874662] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:48:40,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:48:40,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-14 19:48:40,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976937769] [2024-10-14 19:48:40,445 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:48:40,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:48:40,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:48:40,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:48:40,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:48:42,036 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-10-14 19:48:42,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 231 transitions, 2372 flow. Second operand has 14 states, 14 states have (on average 27.785714285714285) internal successors, (389), 14 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:42,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:48:42,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-10-14 19:48:42,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:48:44,376 INFO L124 PetriNetUnfolderBase]: 5522/10738 cut-off events. [2024-10-14 19:48:44,377 INFO L125 PetriNetUnfolderBase]: For 16269/16289 co-relation queries the response was YES. [2024-10-14 19:48:44,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31105 conditions, 10738 events. 5522/10738 cut-off events. For 16269/16289 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 79389 event pairs, 732 based on Foata normal form. 212/10915 useless extension candidates. Maximal degree in co-relation 30845. Up to 2265 conditions per place. [2024-10-14 19:48:44,441 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 324 selfloop transitions, 72 changer transitions 0/418 dead transitions. [2024-10-14 19:48:44,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 418 transitions, 4065 flow [2024-10-14 19:48:44,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 19:48:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 19:48:44,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 489 transitions. [2024-10-14 19:48:44,444 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6791666666666667 [2024-10-14 19:48:44,444 INFO L175 Difference]: Start difference. First operand has 162 places, 231 transitions, 2372 flow. Second operand 12 states and 489 transitions. [2024-10-14 19:48:44,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 418 transitions, 4065 flow [2024-10-14 19:48:44,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 418 transitions, 3992 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-10-14 19:48:44,473 INFO L231 Difference]: Finished difference. Result has 173 places, 243 transitions, 2615 flow [2024-10-14 19:48:44,473 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2299, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2615, PETRI_PLACES=173, PETRI_TRANSITIONS=243} [2024-10-14 19:48:44,474 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 115 predicate places. [2024-10-14 19:48:44,474 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 243 transitions, 2615 flow [2024-10-14 19:48:44,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 27.785714285714285) internal successors, (389), 14 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:44,474 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:48:44,474 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:48:44,479 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 (21)] Ended with exit code 0 [2024-10-14 19:48:44,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:44,675 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:48:44,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:48:44,675 INFO L85 PathProgramCache]: Analyzing trace with hash -558632727, now seen corresponding path program 2 times [2024-10-14 19:48:44,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:48:44,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490728460] [2024-10-14 19:48:44,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:48:44,675 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:44,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:48:44,678 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:48:44,679 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 (22)] Waiting until timeout for monitored process [2024-10-14 19:48:44,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 19:48:44,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:48:44,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-14 19:48:44,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:48:44,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:48:44,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:48:44,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:48:44,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 19:48:44,855 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:48:44,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-14 19:48:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-14 19:48:44,936 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:48:44,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:48:44,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490728460] [2024-10-14 19:48:44,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490728460] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:48:44,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:48:44,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:48:44,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270653073] [2024-10-14 19:48:44,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:48:44,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 19:48:44,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:48:44,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 19:48:44,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-14 19:48:45,215 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-10-14 19:48:45,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 243 transitions, 2615 flow. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:45,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:48:45,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-10-14 19:48:45,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:48:46,775 INFO L124 PetriNetUnfolderBase]: 6353/12498 cut-off events. [2024-10-14 19:48:46,776 INFO L125 PetriNetUnfolderBase]: For 27684/27816 co-relation queries the response was YES. [2024-10-14 19:48:46,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38474 conditions, 12498 events. 6353/12498 cut-off events. For 27684/27816 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 98416 event pairs, 2885 based on Foata normal form. 83/12426 useless extension candidates. Maximal degree in co-relation 38206. Up to 5637 conditions per place. [2024-10-14 19:48:46,862 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 248 selfloop transitions, 37 changer transitions 0/308 dead transitions. [2024-10-14 19:48:46,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 308 transitions, 3719 flow [2024-10-14 19:48:46,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 19:48:46,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 19:48:46,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 210 transitions. [2024-10-14 19:48:46,864 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-10-14 19:48:46,864 INFO L175 Difference]: Start difference. First operand has 173 places, 243 transitions, 2615 flow. Second operand 6 states and 210 transitions. [2024-10-14 19:48:46,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 308 transitions, 3719 flow [2024-10-14 19:48:46,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 308 transitions, 3642 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-10-14 19:48:46,907 INFO L231 Difference]: Finished difference. Result has 177 places, 251 transitions, 2719 flow [2024-10-14 19:48:46,911 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2546, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2719, PETRI_PLACES=177, PETRI_TRANSITIONS=251} [2024-10-14 19:48:46,911 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 119 predicate places. [2024-10-14 19:48:46,911 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 251 transitions, 2719 flow [2024-10-14 19:48:46,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:46,912 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:48:46,912 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:48:46,915 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 (22)] Ended with exit code 0 [2024-10-14 19:48:47,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:47,114 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:48:47,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:48:47,115 INFO L85 PathProgramCache]: Analyzing trace with hash -953798583, now seen corresponding path program 2 times [2024-10-14 19:48:47,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:48:47,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866275461] [2024-10-14 19:48:47,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:48:47,115 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:48:47,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:48:47,116 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:48:47,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2024-10-14 19:48:47,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:48:47,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:48:47,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 19:48:47,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:48:47,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:48:47,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:48:47,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:48:47,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 19:48:47,391 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:48:47,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-14 19:48:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 19:48:47,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:48:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 19:48:48,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:48:48,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866275461] [2024-10-14 19:48:48,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866275461] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:48:48,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:48:48,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-14 19:48:48,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071313245] [2024-10-14 19:48:48,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:48:48,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 19:48:48,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:48:48,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 19:48:48,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-10-14 19:48:52,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 19:48:56,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 19:48:57,784 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-10-14 19:48:57,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 251 transitions, 2719 flow. Second operand has 12 states, 12 states have (on average 24.666666666666668) internal successors, (296), 12 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:48:57,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:48:57,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-10-14 19:48:57,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:49:02,158 INFO L124 PetriNetUnfolderBase]: 13806/26551 cut-off events. [2024-10-14 19:49:02,158 INFO L125 PetriNetUnfolderBase]: For 69122/69441 co-relation queries the response was YES. [2024-10-14 19:49:02,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85238 conditions, 26551 events. 13806/26551 cut-off events. For 69122/69441 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 223419 event pairs, 2077 based on Foata normal form. 663/27189 useless extension candidates. Maximal degree in co-relation 84968. Up to 4343 conditions per place. [2024-10-14 19:49:02,452 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 489 selfloop transitions, 50 changer transitions 0/553 dead transitions. [2024-10-14 19:49:02,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 553 transitions, 6308 flow [2024-10-14 19:49:02,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 19:49:02,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 19:49:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 443 transitions. [2024-10-14 19:49:02,454 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6152777777777778 [2024-10-14 19:49:02,454 INFO L175 Difference]: Start difference. First operand has 177 places, 251 transitions, 2719 flow. Second operand 12 states and 443 transitions. [2024-10-14 19:49:02,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 553 transitions, 6308 flow [2024-10-14 19:49:02,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 553 transitions, 6234 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-10-14 19:49:02,621 INFO L231 Difference]: Finished difference. Result has 188 places, 263 transitions, 2907 flow [2024-10-14 19:49:02,622 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2907, PETRI_PLACES=188, PETRI_TRANSITIONS=263} [2024-10-14 19:49:02,622 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 130 predicate places. [2024-10-14 19:49:02,622 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 263 transitions, 2907 flow [2024-10-14 19:49:02,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.666666666666668) internal successors, (296), 12 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:02,623 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:49:02,623 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:49:02,628 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 (23)] Forceful destruction successful, exit code 0 [2024-10-14 19:49:02,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:02,824 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:49:02,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:49:02,824 INFO L85 PathProgramCache]: Analyzing trace with hash 524540466, now seen corresponding path program 1 times [2024-10-14 19:49:02,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:49:02,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [828901679] [2024-10-14 19:49:02,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:49:02,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:02,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:49:02,826 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:49:02,827 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 (24)] Waiting until timeout for monitored process [2024-10-14 19:49:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:49:02,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 19:49:02,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:49:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:49:03,216 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:49:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:49:03,699 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:49:03,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [828901679] [2024-10-14 19:49:03,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [828901679] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:49:03,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:49:03,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2024-10-14 19:49:03,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088895223] [2024-10-14 19:49:03,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:49:03,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 19:49:03,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:49:03,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 19:49:03,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-10-14 19:49:04,084 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-14 19:49:04,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 263 transitions, 2907 flow. Second operand has 16 states, 16 states have (on average 33.25) internal successors, (532), 16 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:04,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:49:04,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-14 19:49:04,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:49:10,566 INFO L124 PetriNetUnfolderBase]: 13695/29974 cut-off events. [2024-10-14 19:49:10,567 INFO L125 PetriNetUnfolderBase]: For 74623/75373 co-relation queries the response was YES. [2024-10-14 19:49:10,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95524 conditions, 29974 events. 13695/29974 cut-off events. For 74623/75373 co-relation queries the response was YES. Maximal size of possible extension queue 857. Compared 301899 event pairs, 7331 based on Foata normal form. 80/29202 useless extension candidates. Maximal degree in co-relation 95250. Up to 5624 conditions per place. [2024-10-14 19:49:11,120 INFO L140 encePairwiseOnDemand]: 45/60 looper letters, 293 selfloop transitions, 141 changer transitions 12/494 dead transitions. [2024-10-14 19:49:11,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 494 transitions, 5239 flow [2024-10-14 19:49:11,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-14 19:49:11,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-14 19:49:11,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 870 transitions. [2024-10-14 19:49:11,124 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2024-10-14 19:49:11,124 INFO L175 Difference]: Start difference. First operand has 188 places, 263 transitions, 2907 flow. Second operand 21 states and 870 transitions. [2024-10-14 19:49:11,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 494 transitions, 5239 flow [2024-10-14 19:49:11,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 494 transitions, 5163 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-14 19:49:11,321 INFO L231 Difference]: Finished difference. Result has 214 places, 299 transitions, 3603 flow [2024-10-14 19:49:11,321 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2853, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3603, PETRI_PLACES=214, PETRI_TRANSITIONS=299} [2024-10-14 19:49:11,322 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 156 predicate places. [2024-10-14 19:49:11,322 INFO L471 AbstractCegarLoop]: Abstraction has has 214 places, 299 transitions, 3603 flow [2024-10-14 19:49:11,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.25) internal successors, (532), 16 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:11,322 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:49:11,322 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:49:11,328 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 (24)] Ended with exit code 0 [2024-10-14 19:49:11,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:11,525 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-14 19:49:11,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:49:11,526 INFO L85 PathProgramCache]: Analyzing trace with hash -860069723, now seen corresponding path program 1 times [2024-10-14 19:49:11,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:49:11,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702784247] [2024-10-14 19:49:11,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:49:11,526 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:49:11,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:49:11,529 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:49:11,530 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 (25)] Waiting until timeout for monitored process [2024-10-14 19:49:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:49:11,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 19:49:11,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:49:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:49:11,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:49:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:49:12,873 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:49:12,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702784247] [2024-10-14 19:49:12,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702784247] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:49:12,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:49:12,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-10-14 19:49:12,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96539850] [2024-10-14 19:49:12,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:49:12,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-14 19:49:12,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:49:12,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-14 19:49:12,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-10-14 19:49:13,490 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 60 [2024-10-14 19:49:13,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 299 transitions, 3603 flow. Second operand has 18 states, 18 states have (on average 33.0) internal successors, (594), 18 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:49:13,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:49:13,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 60 [2024-10-14 19:49:13,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand