./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-node-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 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-node-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 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:15:59,499 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:15:59,570 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:15:59,578 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:15:59,578 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:15:59,610 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:15:59,611 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:15:59,611 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:15:59,611 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:15:59,612 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:15:59,612 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:15:59,612 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:15:59,613 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:15:59,614 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:15:59,614 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:15:59,615 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:15:59,615 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:15:59,616 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:15:59,616 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:15:59,616 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:15:59,616 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:15:59,617 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:15:59,617 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:15:59,618 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:15:59,618 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:15:59,618 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:15:59,618 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:15:59,619 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:15:59,619 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:15:59,619 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:15:59,620 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:15:59,620 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:15:59,620 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:15:59,621 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:15:59,621 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:15:59,621 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:15:59,622 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:15:59,622 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:15:59,622 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:15:59,622 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:15:59,623 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:15:59,623 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:15:59,623 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 [2024-10-24 19:15:59,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:15:59,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:15:59,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:15:59,912 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:15:59,912 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:15:59,913 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2024-10-24 19:16:01,383 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:16:01,593 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:16:01,593 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2024-10-24 19:16:01,601 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba6fb926a/d5dda7d4a1fa4315a708daf9185dff40/FLAGde0ce4373 [2024-10-24 19:16:01,616 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba6fb926a/d5dda7d4a1fa4315a708daf9185dff40 [2024-10-24 19:16:01,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:16:01,619 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:16:01,620 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:16:01,620 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:16:01,626 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:16:01,627 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:16:01" (1/1) ... [2024-10-24 19:16:01,637 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d68f95f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:01, skipping insertion in model container [2024-10-24 19:16:01,638 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:16:01" (1/1) ... [2024-10-24 19:16:01,660 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:16:01,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:16:01,894 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) [2024-10-24 19:16:01,895 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@13475435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:01, skipping insertion in model container [2024-10-24 19:16:01,895 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:16:01,896 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-24 19:16:01,897 INFO L158 Benchmark]: Toolchain (without parser) took 277.46ms. Allocated memory is still 167.8MB. Free memory was 139.9MB in the beginning and 129.7MB in the end (delta: 10.2MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. [2024-10-24 19:16:01,898 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 121.6MB. Free memory is still 82.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 19:16:01,898 INFO L158 Benchmark]: CACSL2BoogieTranslator took 275.40ms. Allocated memory is still 167.8MB. Free memory was 139.7MB in the beginning and 129.7MB in the end (delta: 10.0MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. [2024-10-24 19:16:01,899 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 121.6MB. Free memory is still 82.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 275.40ms. Allocated memory is still 167.8MB. Free memory was 139.7MB in the beginning and 129.7MB in the end (delta: 10.0MB). Peak memory consumption was 14.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 102]: 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-node-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 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:16:03,881 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:16:03,955 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-24 19:16:03,969 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:16:03,969 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:16:03,996 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:16:03,997 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:16:03,997 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:16:03,998 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:16:03,998 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:16:03,998 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:16:03,998 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:16:03,999 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:16:04,002 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:16:04,002 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:16:04,003 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:16:04,003 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:16:04,003 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:16:04,003 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:16:04,004 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:16:04,004 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:16:04,005 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:16:04,005 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:16:04,005 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:16:04,005 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:16:04,006 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-24 19:16:04,006 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:16:04,006 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-24 19:16:04,007 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:16:04,007 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:16:04,007 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:16:04,008 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:16:04,008 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:16:04,008 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:16:04,008 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:16:04,009 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:16:04,009 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:16:04,009 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:16:04,010 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-24 19:16:04,010 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-24 19:16:04,010 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:16:04,011 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:16:04,012 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:16:04,012 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:16:04,012 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-24 19:16:04,013 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 [2024-10-24 19:16:04,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:16:04,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:16:04,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:16:04,357 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:16:04,358 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:16:04,360 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2024-10-24 19:16:05,898 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:16:06,099 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:16:06,100 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2024-10-24 19:16:06,109 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28e7e289b/e0f142aca7c9428aab18acaae956070b/FLAGc41f73c90 [2024-10-24 19:16:06,122 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28e7e289b/e0f142aca7c9428aab18acaae956070b [2024-10-24 19:16:06,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:16:06,126 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:16:06,128 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:16:06,128 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:16:06,146 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:16:06,147 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:16:06" (1/1) ... [2024-10-24 19:16:06,147 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33e92b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:06, skipping insertion in model container [2024-10-24 19:16:06,148 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:16:06" (1/1) ... [2024-10-24 19:16:06,170 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:16:06,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:16:06,449 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-24 19:16:06,454 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:16:06,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:16:06,495 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:16:06,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:16:06,556 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:16:06,557 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:06 WrapperNode [2024-10-24 19:16:06,557 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:16:06,558 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:16:06,558 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:16:06,558 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:16:06,565 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:06" (1/1) ... [2024-10-24 19:16:06,580 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:06" (1/1) ... [2024-10-24 19:16:06,623 INFO L138 Inliner]: procedures = 27, calls = 41, calls flagged for inlining = 19, calls inlined = 25, statements flattened = 279 [2024-10-24 19:16:06,625 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:16:06,626 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:16:06,626 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:16:06,627 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:16:06,637 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:06" (1/1) ... [2024-10-24 19:16:06,637 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:06" (1/1) ... [2024-10-24 19:16:06,647 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:06" (1/1) ... [2024-10-24 19:16:06,693 INFO L175 MemorySlicer]: Split 18 memory accesses to 3 slices as follows [2, 6, 10]. 56 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2024-10-24 19:16:06,694 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:06" (1/1) ... [2024-10-24 19:16:06,694 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:06" (1/1) ... [2024-10-24 19:16:06,713 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:06" (1/1) ... [2024-10-24 19:16:06,721 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:06" (1/1) ... [2024-10-24 19:16:06,723 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:06" (1/1) ... [2024-10-24 19:16:06,725 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:06" (1/1) ... [2024-10-24 19:16:06,729 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:16:06,730 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:16:06,730 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:16:06,730 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:16:06,735 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:06" (1/1) ... [2024-10-24 19:16:06,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:16:06,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:16:06,768 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) [2024-10-24 19:16:06,772 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 [2024-10-24 19:16:06,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:16:06,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2024-10-24 19:16:06,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2024-10-24 19:16:06,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2024-10-24 19:16:06,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-24 19:16:06,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-24 19:16:06,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-10-24 19:16:06,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-24 19:16:06,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-24 19:16:06,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2024-10-24 19:16:06,833 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 19:16:06,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 19:16:06,833 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 19:16:06,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 19:16:06,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 19:16:06,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:16:06,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:16:06,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2024-10-24 19:16:06,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#1 [2024-10-24 19:16:06,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#2 [2024-10-24 19:16:06,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-24 19:16:06,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-24 19:16:06,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2024-10-24 19:16:06,838 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 19:16:07,002 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:16:07,005 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:16:07,704 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:16:07,704 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:16:08,078 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:16:08,078 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-24 19:16:08,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:16:08 BoogieIcfgContainer [2024-10-24 19:16:08,079 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:16:08,083 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:16:08,083 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:16:08,086 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:16:08,087 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:16:06" (1/3) ... [2024-10-24 19:16:08,087 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c57c892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:16:08, skipping insertion in model container [2024-10-24 19:16:08,087 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:16:06" (2/3) ... [2024-10-24 19:16:08,088 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c57c892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:16:08, skipping insertion in model container [2024-10-24 19:16:08,089 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:16:08" (3/3) ... [2024-10-24 19:16:08,091 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2024-10-24 19:16:08,108 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:16:08,109 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-10-24 19:16:08,109 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:16:08,196 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 19:16:08,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 82 transitions, 178 flow [2024-10-24 19:16:08,274 INFO L124 PetriNetUnfolderBase]: 8/80 cut-off events. [2024-10-24 19:16:08,274 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 19:16:08,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 8/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 221 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2024-10-24 19:16:08,280 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 82 transitions, 178 flow [2024-10-24 19:16:08,285 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 79 transitions, 170 flow [2024-10-24 19:16:08,299 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:16:08,307 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;@44f9263f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:16:08,309 INFO L334 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2024-10-24 19:16:08,312 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:16:08,313 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-24 19:16:08,313 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:16:08,314 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:08,314 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:16:08,315 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-10-24 19:16:08,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:08,320 INFO L85 PathProgramCache]: Analyzing trace with hash 909452, now seen corresponding path program 1 times [2024-10-24 19:16:08,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:16:08,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753217207] [2024-10-24 19:16:08,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:08,333 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 [2024-10-24 19:16:08,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:16:08,337 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) [2024-10-24 19:16:08,338 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 [2024-10-24 19:16:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:08,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 19:16:08,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:08,510 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 [2024-10-24 19:16:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:16:08,532 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:16:08,532 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:16:08,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753217207] [2024-10-24 19:16:08,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753217207] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:16:08,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:16:08,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:16:08,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013617302] [2024-10-24 19:16:08,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:16:08,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:16:08,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:16:08,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:16:08,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:16:08,651 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-10-24 19:16:08,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2024-10-24 19:16:08,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:08,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-10-24 19:16:08,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:08,923 INFO L124 PetriNetUnfolderBase]: 192/580 cut-off events. [2024-10-24 19:16:08,923 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-24 19:16:08,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 912 conditions, 580 events. 192/580 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3507 event pairs, 113 based on Foata normal form. 1/424 useless extension candidates. Maximal degree in co-relation 827. Up to 301 conditions per place. [2024-10-24 19:16:08,930 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 32 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-10-24 19:16:08,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 230 flow [2024-10-24 19:16:08,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:16:08,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:16:08,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2024-10-24 19:16:08,944 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6869918699186992 [2024-10-24 19:16:08,946 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 170 flow. Second operand 3 states and 169 transitions. [2024-10-24 19:16:08,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 230 flow [2024-10-24 19:16:08,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 75 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:16:08,954 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 158 flow [2024-10-24 19:16:08,971 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-10-24 19:16:08,977 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -6 predicate places. [2024-10-24 19:16:08,977 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 158 flow [2024-10-24 19:16:08,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 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) [2024-10-24 19:16:08,978 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:08,978 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:16:08,985 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 (2)] Ended with exit code 0 [2024-10-24 19:16:09,178 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 [2024-10-24 19:16:09,179 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-10-24 19:16:09,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:09,180 INFO L85 PathProgramCache]: Analyzing trace with hash 909453, now seen corresponding path program 1 times [2024-10-24 19:16:09,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:16:09,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485182869] [2024-10-24 19:16:09,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:09,181 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 [2024-10-24 19:16:09,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:16:09,184 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) [2024-10-24 19:16:09,186 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 [2024-10-24 19:16:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:09,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:16:09,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:09,291 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 [2024-10-24 19:16:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:16:09,373 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:16:09,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:16:09,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485182869] [2024-10-24 19:16:09,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485182869] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:16:09,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:16:09,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:16:09,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36949292] [2024-10-24 19:16:09,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:16:09,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:16:09,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:16:09,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:16:09,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:16:09,542 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-10-24 19:16:09,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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) [2024-10-24 19:16:09,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:09,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-10-24 19:16:09,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:09,953 INFO L124 PetriNetUnfolderBase]: 193/585 cut-off events. [2024-10-24 19:16:09,953 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 19:16:09,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 911 conditions, 585 events. 193/585 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3528 event pairs, 113 based on Foata normal form. 0/427 useless extension candidates. Maximal degree in co-relation 877. Up to 310 conditions per place. [2024-10-24 19:16:09,961 INFO L140 encePairwiseOnDemand]: 74/82 looper letters, 35 selfloop transitions, 6 changer transitions 0/80 dead transitions. [2024-10-24 19:16:09,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 80 transitions, 252 flow [2024-10-24 19:16:09,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:16:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:16:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 220 transitions. [2024-10-24 19:16:09,966 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6707317073170732 [2024-10-24 19:16:09,966 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 158 flow. Second operand 4 states and 220 transitions. [2024-10-24 19:16:09,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 80 transitions, 252 flow [2024-10-24 19:16:09,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 80 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:16:09,969 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 193 flow [2024-10-24 19:16:09,969 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-10-24 19:16:09,970 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -3 predicate places. [2024-10-24 19:16:09,970 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 193 flow [2024-10-24 19:16:09,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 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) [2024-10-24 19:16:09,971 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:09,971 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-24 19:16:09,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2024-10-24 19:16:10,172 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 [2024-10-24 19:16:10,172 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-10-24 19:16:10,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:10,173 INFO L85 PathProgramCache]: Analyzing trace with hash 874013510, now seen corresponding path program 1 times [2024-10-24 19:16:10,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:16:10,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622514639] [2024-10-24 19:16:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:10,174 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 [2024-10-24 19:16:10,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:16:10,176 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) [2024-10-24 19:16:10,177 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 [2024-10-24 19:16:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:10,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 19:16:10,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:10,252 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 [2024-10-24 19:16:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:16:10,407 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:16:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:16:10,684 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:16:10,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622514639] [2024-10-24 19:16:10,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622514639] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:16:10,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:16:10,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-24 19:16:10,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866224525] [2024-10-24 19:16:10,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:16:10,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:16:10,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:16:10,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:16:10,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:16:11,321 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-10-24 19:16:11,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 193 flow. Second operand has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 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) [2024-10-24 19:16:11,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:11,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-10-24 19:16:11,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:12,310 INFO L124 PetriNetUnfolderBase]: 199/603 cut-off events. [2024-10-24 19:16:12,310 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-10-24 19:16:12,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 977 conditions, 603 events. 199/603 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3629 event pairs, 113 based on Foata normal form. 0/442 useless extension candidates. Maximal degree in co-relation 886. Up to 313 conditions per place. [2024-10-24 19:16:12,315 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 35 selfloop transitions, 24 changer transitions 0/98 dead transitions. [2024-10-24 19:16:12,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 98 transitions, 382 flow [2024-10-24 19:16:12,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 19:16:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 19:16:12,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 505 transitions. [2024-10-24 19:16:12,320 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-10-24 19:16:12,320 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 193 flow. Second operand 10 states and 505 transitions. [2024-10-24 19:16:12,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 98 transitions, 382 flow [2024-10-24 19:16:12,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 98 transitions, 382 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:16:12,324 INFO L231 Difference]: Finished difference. Result has 87 places, 98 transitions, 348 flow [2024-10-24 19:16:12,324 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=75, 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=10, PETRI_FLOW=348, PETRI_PLACES=87, PETRI_TRANSITIONS=98} [2024-10-24 19:16:12,325 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 9 predicate places. [2024-10-24 19:16:12,325 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 98 transitions, 348 flow [2024-10-24 19:16:12,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 45.0) internal successors, (450), 10 states have internal predecessors, (450), 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) [2024-10-24 19:16:12,326 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:12,326 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:16:12,332 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 [2024-10-24 19:16:12,529 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 [2024-10-24 19:16:12,530 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-10-24 19:16:12,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:12,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1886564600, now seen corresponding path program 1 times [2024-10-24 19:16:12,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:16:12,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537156139] [2024-10-24 19:16:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:12,531 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 [2024-10-24 19:16:12,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:16:12,533 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) [2024-10-24 19:16:12,534 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 [2024-10-24 19:16:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:12,604 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 19:16:12,605 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:12,611 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 [2024-10-24 19:16:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:16:12,619 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:16:12,619 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:16:12,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537156139] [2024-10-24 19:16:12,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537156139] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:16:12,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:16:12,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:16:12,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911560166] [2024-10-24 19:16:12,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:16:12,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:16:12,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:16:12,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:16:12,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:16:12,667 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-10-24 19:16:12,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 98 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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) [2024-10-24 19:16:12,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:12,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-10-24 19:16:12,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:12,841 INFO L124 PetriNetUnfolderBase]: 199/601 cut-off events. [2024-10-24 19:16:12,841 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-10-24 19:16:12,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1019 conditions, 601 events. 199/601 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3610 event pairs, 113 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 960. Up to 320 conditions per place. [2024-10-24 19:16:12,845 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 51 selfloop transitions, 6 changer transitions 0/96 dead transitions. [2024-10-24 19:16:12,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 96 transitions, 458 flow [2024-10-24 19:16:12,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:16:12,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:16:12,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2024-10-24 19:16:12,847 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-10-24 19:16:12,847 INFO L175 Difference]: Start difference. First operand has 87 places, 98 transitions, 348 flow. Second operand 3 states and 168 transitions. [2024-10-24 19:16:12,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 96 transitions, 458 flow [2024-10-24 19:16:12,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 96 transitions, 406 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-10-24 19:16:12,855 INFO L231 Difference]: Finished difference. Result has 83 places, 96 transitions, 304 flow [2024-10-24 19:16:12,855 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=304, PETRI_PLACES=83, PETRI_TRANSITIONS=96} [2024-10-24 19:16:12,856 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 5 predicate places. [2024-10-24 19:16:12,857 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 96 transitions, 304 flow [2024-10-24 19:16:12,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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) [2024-10-24 19:16:12,857 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:12,858 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:16:12,862 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 [2024-10-24 19:16:13,058 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 [2024-10-24 19:16:13,058 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-10-24 19:16:13,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:13,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1886564599, now seen corresponding path program 1 times [2024-10-24 19:16:13,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:16:13,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286310542] [2024-10-24 19:16:13,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:13,060 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 [2024-10-24 19:16:13,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:16:13,063 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) [2024-10-24 19:16:13,064 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 [2024-10-24 19:16:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:13,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 19:16:13,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:13,169 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 5 [2024-10-24 19:16:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:16:13,215 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:16:13,215 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:16:13,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286310542] [2024-10-24 19:16:13,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286310542] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:16:13,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:16:13,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:16:13,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466817864] [2024-10-24 19:16:13,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:16:13,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:16:13,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:16:13,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:16:13,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:16:13,453 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-10-24 19:16:13,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 96 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 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) [2024-10-24 19:16:13,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:13,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-10-24 19:16:13,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:13,746 INFO L124 PetriNetUnfolderBase]: 200/604 cut-off events. [2024-10-24 19:16:13,746 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-10-24 19:16:13,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1007 conditions, 604 events. 200/604 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3623 event pairs, 113 based on Foata normal form. 0/448 useless extension candidates. Maximal degree in co-relation 954. Up to 328 conditions per place. [2024-10-24 19:16:13,752 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 53 selfloop transitions, 9 changer transitions 0/99 dead transitions. [2024-10-24 19:16:13,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 99 transitions, 434 flow [2024-10-24 19:16:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:16:13,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:16:13,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 260 transitions. [2024-10-24 19:16:13,754 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-10-24 19:16:13,754 INFO L175 Difference]: Start difference. First operand has 83 places, 96 transitions, 304 flow. Second operand 5 states and 260 transitions. [2024-10-24 19:16:13,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 99 transitions, 434 flow [2024-10-24 19:16:13,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 422 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:16:13,759 INFO L231 Difference]: Finished difference. Result has 87 places, 99 transitions, 333 flow [2024-10-24 19:16:13,761 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=333, PETRI_PLACES=87, PETRI_TRANSITIONS=99} [2024-10-24 19:16:13,763 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 9 predicate places. [2024-10-24 19:16:13,763 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 99 transitions, 333 flow [2024-10-24 19:16:13,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 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) [2024-10-24 19:16:13,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:13,764 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:16:13,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2024-10-24 19:16:13,964 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 [2024-10-24 19:16:13,965 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-10-24 19:16:13,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:13,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1646041094, now seen corresponding path program 1 times [2024-10-24 19:16:13,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:16:13,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53115814] [2024-10-24 19:16:13,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:13,966 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 [2024-10-24 19:16:13,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:16:13,968 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) [2024-10-24 19:16:13,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-24 19:16:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:14,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 19:16:14,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:14,081 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 5 [2024-10-24 19:16:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:16:14,125 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:16:14,125 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:16:14,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53115814] [2024-10-24 19:16:14,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53115814] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:16:14,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:16:14,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:16:14,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635545788] [2024-10-24 19:16:14,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:16:14,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:16:14,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:16:14,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:16:14,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:16:14,334 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-10-24 19:16:14,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 99 transitions, 333 flow. Second operand has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:16:14,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:14,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-10-24 19:16:14,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:14,638 INFO L124 PetriNetUnfolderBase]: 201/607 cut-off events. [2024-10-24 19:16:14,639 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-24 19:16:14,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1025 conditions, 607 events. 201/607 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3640 event pairs, 113 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 995. Up to 323 conditions per place. [2024-10-24 19:16:14,643 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 56 selfloop transitions, 9 changer transitions 0/102 dead transitions. [2024-10-24 19:16:14,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 102 transitions, 469 flow [2024-10-24 19:16:14,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:16:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:16:14,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 260 transitions. [2024-10-24 19:16:14,645 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-10-24 19:16:14,645 INFO L175 Difference]: Start difference. First operand has 87 places, 99 transitions, 333 flow. Second operand 5 states and 260 transitions. [2024-10-24 19:16:14,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 102 transitions, 469 flow [2024-10-24 19:16:14,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 102 transitions, 460 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:16:14,649 INFO L231 Difference]: Finished difference. Result has 91 places, 102 transitions, 362 flow [2024-10-24 19:16:14,649 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=91, PETRI_TRANSITIONS=102} [2024-10-24 19:16:14,650 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 13 predicate places. [2024-10-24 19:16:14,650 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 102 transitions, 362 flow [2024-10-24 19:16:14,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:16:14,651 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:14,651 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:16:14,657 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 [2024-10-24 19:16:14,851 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 [2024-10-24 19:16:14,852 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-10-24 19:16:14,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:14,852 INFO L85 PathProgramCache]: Analyzing trace with hash -512351874, now seen corresponding path program 1 times [2024-10-24 19:16:14,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:16:14,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93290497] [2024-10-24 19:16:14,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:14,853 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 [2024-10-24 19:16:14,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:16:14,855 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:16:14,856 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 [2024-10-24 19:16:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:14,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-24 19:16:14,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:14,968 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 5 [2024-10-24 19:16:15,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:16:15,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:16:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:16:15,365 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:16:15,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93290497] [2024-10-24 19:16:15,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93290497] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:16:15,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:16:15,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-24 19:16:15,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366282776] [2024-10-24 19:16:15,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:16:15,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-24 19:16:15,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:16:15,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-24 19:16:15,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-10-24 19:16:16,361 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-10-24 19:16:16,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 102 transitions, 362 flow. Second operand has 11 states, 11 states have (on average 45.63636363636363) internal successors, (502), 11 states have internal predecessors, (502), 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) [2024-10-24 19:16:16,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:16,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-10-24 19:16:16,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:17,637 INFO L124 PetriNetUnfolderBase]: 205/619 cut-off events. [2024-10-24 19:16:17,637 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-10-24 19:16:17,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 619 events. 205/619 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3707 event pairs, 113 based on Foata normal form. 0/464 useless extension candidates. Maximal degree in co-relation 1038. Up to 329 conditions per place. [2024-10-24 19:16:17,642 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 53 selfloop transitions, 24 changer transitions 0/114 dead transitions. [2024-10-24 19:16:17,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 114 transitions, 573 flow [2024-10-24 19:16:17,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 19:16:17,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-24 19:16:17,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 542 transitions. [2024-10-24 19:16:17,645 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6008869179600886 [2024-10-24 19:16:17,645 INFO L175 Difference]: Start difference. First operand has 91 places, 102 transitions, 362 flow. Second operand 11 states and 542 transitions. [2024-10-24 19:16:17,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 114 transitions, 573 flow [2024-10-24 19:16:17,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 114 transitions, 558 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:16:17,650 INFO L231 Difference]: Finished difference. Result has 103 places, 114 transitions, 488 flow [2024-10-24 19:16:17,651 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=488, PETRI_PLACES=103, PETRI_TRANSITIONS=114} [2024-10-24 19:16:17,651 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 25 predicate places. [2024-10-24 19:16:17,652 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 114 transitions, 488 flow [2024-10-24 19:16:17,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 45.63636363636363) internal successors, (502), 11 states have internal predecessors, (502), 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) [2024-10-24 19:16:17,652 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:17,652 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:16:17,658 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 [2024-10-24 19:16:17,853 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 [2024-10-24 19:16:17,853 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-10-24 19:16:17,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:17,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1297673697, now seen corresponding path program 1 times [2024-10-24 19:16:17,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:16:17,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106945086] [2024-10-24 19:16:17,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:17,855 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 [2024-10-24 19:16:17,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:16:17,858 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) [2024-10-24 19:16:17,859 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 [2024-10-24 19:16:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:17,952 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 19:16:17,954 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:16:18,076 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:16:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:16:18,158 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:16:18,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106945086] [2024-10-24 19:16:18,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106945086] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:16:18,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:16:18,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-24 19:16:18,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779094747] [2024-10-24 19:16:18,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:16:18,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:16:18,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:16:18,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:16:18,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:16:18,402 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2024-10-24 19:16:18,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 114 transitions, 488 flow. Second operand has 10 states, 10 states have (on average 47.4) internal successors, (474), 10 states have internal predecessors, (474), 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) [2024-10-24 19:16:18,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:18,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2024-10-24 19:16:18,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:18,895 INFO L124 PetriNetUnfolderBase]: 396/1191 cut-off events. [2024-10-24 19:16:18,895 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-10-24 19:16:18,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2116 conditions, 1191 events. 396/1191 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8514 event pairs, 225 based on Foata normal form. 2/907 useless extension candidates. Maximal degree in co-relation 2030. Up to 319 conditions per place. [2024-10-24 19:16:18,904 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 89 selfloop transitions, 44 changer transitions 0/172 dead transitions. [2024-10-24 19:16:18,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 172 transitions, 1048 flow [2024-10-24 19:16:18,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 19:16:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 19:16:18,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 488 transitions. [2024-10-24 19:16:18,906 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6612466124661247 [2024-10-24 19:16:18,906 INFO L175 Difference]: Start difference. First operand has 103 places, 114 transitions, 488 flow. Second operand 9 states and 488 transitions. [2024-10-24 19:16:18,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 172 transitions, 1048 flow [2024-10-24 19:16:18,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 172 transitions, 963 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-10-24 19:16:18,912 INFO L231 Difference]: Finished difference. Result has 107 places, 133 transitions, 642 flow [2024-10-24 19:16:18,914 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=642, PETRI_PLACES=107, PETRI_TRANSITIONS=133} [2024-10-24 19:16:18,915 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 29 predicate places. [2024-10-24 19:16:18,916 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 133 transitions, 642 flow [2024-10-24 19:16:18,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 47.4) internal successors, (474), 10 states have internal predecessors, (474), 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) [2024-10-24 19:16:18,917 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:18,917 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-24 19:16:18,922 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 [2024-10-24 19:16:19,117 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 [2024-10-24 19:16:19,118 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-10-24 19:16:19,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:19,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1984467471, now seen corresponding path program 2 times [2024-10-24 19:16:19,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:16:19,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699054524] [2024-10-24 19:16:19,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:16:19,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:16:19,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:16:19,120 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) [2024-10-24 19:16:19,121 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 [2024-10-24 19:16:19,195 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:16:19,195 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:16:19,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 19:16:19,199 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:19,213 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 [2024-10-24 19:16:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:16:19,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:16:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:16:19,866 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:16:19,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699054524] [2024-10-24 19:16:19,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699054524] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:16:19,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:16:19,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-24 19:16:19,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864092900] [2024-10-24 19:16:19,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:16:19,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:16:19,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:16:19,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:16:19,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:16:21,970 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-10-24 19:16:21,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 133 transitions, 642 flow. Second operand has 14 states, 14 states have (on average 45.57142857142857) internal successors, (638), 14 states have internal predecessors, (638), 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) [2024-10-24 19:16:21,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:21,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-10-24 19:16:21,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:28,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:16:30,010 INFO L124 PetriNetUnfolderBase]: 421/1274 cut-off events. [2024-10-24 19:16:30,010 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2024-10-24 19:16:30,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2362 conditions, 1274 events. 421/1274 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9306 event pairs, 226 based on Foata normal form. 18/983 useless extension candidates. Maximal degree in co-relation 2261. Up to 667 conditions per place. [2024-10-24 19:16:30,020 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 68 selfloop transitions, 70 changer transitions 0/175 dead transitions. [2024-10-24 19:16:30,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 175 transitions, 1158 flow [2024-10-24 19:16:30,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 19:16:30,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-24 19:16:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1075 transitions. [2024-10-24 19:16:30,024 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5958980044345898 [2024-10-24 19:16:30,025 INFO L175 Difference]: Start difference. First operand has 107 places, 133 transitions, 642 flow. Second operand 22 states and 1075 transitions. [2024-10-24 19:16:30,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 175 transitions, 1158 flow [2024-10-24 19:16:30,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 175 transitions, 1157 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:16:30,031 INFO L231 Difference]: Finished difference. Result has 133 places, 175 transitions, 1081 flow [2024-10-24 19:16:30,031 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1081, PETRI_PLACES=133, PETRI_TRANSITIONS=175} [2024-10-24 19:16:30,032 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 55 predicate places. [2024-10-24 19:16:30,032 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 175 transitions, 1081 flow [2024-10-24 19:16:30,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 45.57142857142857) internal successors, (638), 14 states have internal predecessors, (638), 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) [2024-10-24 19:16:30,033 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:30,033 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:16:30,037 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 [2024-10-24 19:16:30,233 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 [2024-10-24 19:16:30,234 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-10-24 19:16:30,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:30,234 INFO L85 PathProgramCache]: Analyzing trace with hash 840698701, now seen corresponding path program 1 times [2024-10-24 19:16:30,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:16:30,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1352881054] [2024-10-24 19:16:30,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:30,234 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 [2024-10-24 19:16:30,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:16:30,236 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) [2024-10-24 19:16:30,237 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 [2024-10-24 19:16:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:30,316 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 19:16:30,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:16:30,339 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:16:30,339 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:16:30,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1352881054] [2024-10-24 19:16:30,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1352881054] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:16:30,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:16:30,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:16:30,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28660801] [2024-10-24 19:16:30,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:16:30,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:16:30,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:16:30,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:16:30,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:16:30,385 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2024-10-24 19:16:30,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 175 transitions, 1081 flow. Second operand has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 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) [2024-10-24 19:16:30,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:30,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2024-10-24 19:16:30,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:30,656 INFO L124 PetriNetUnfolderBase]: 419/1272 cut-off events. [2024-10-24 19:16:30,656 INFO L125 PetriNetUnfolderBase]: For 187/187 co-relation queries the response was YES. [2024-10-24 19:16:30,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2487 conditions, 1272 events. 419/1272 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 9207 event pairs, 226 based on Foata normal form. 2/971 useless extension candidates. Maximal degree in co-relation 2380. Up to 715 conditions per place. [2024-10-24 19:16:30,667 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 121 selfloop transitions, 13 changer transitions 0/173 dead transitions. [2024-10-24 19:16:30,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 173 transitions, 1329 flow [2024-10-24 19:16:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:16:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:16:30,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 223 transitions. [2024-10-24 19:16:30,670 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6798780487804879 [2024-10-24 19:16:30,670 INFO L175 Difference]: Start difference. First operand has 133 places, 175 transitions, 1081 flow. Second operand 4 states and 223 transitions. [2024-10-24 19:16:30,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 173 transitions, 1329 flow [2024-10-24 19:16:30,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 173 transitions, 1157 flow, removed 54 selfloop flow, removed 9 redundant places. [2024-10-24 19:16:30,680 INFO L231 Difference]: Finished difference. Result has 127 places, 173 transitions, 915 flow [2024-10-24 19:16:30,681 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=915, PETRI_PLACES=127, PETRI_TRANSITIONS=173} [2024-10-24 19:16:30,682 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 49 predicate places. [2024-10-24 19:16:30,682 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 173 transitions, 915 flow [2024-10-24 19:16:30,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 4 states have internal predecessors, (194), 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) [2024-10-24 19:16:30,682 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:30,682 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:16:30,693 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 [2024-10-24 19:16:30,883 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 [2024-10-24 19:16:30,883 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-10-24 19:16:30,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:30,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1757674052, now seen corresponding path program 1 times [2024-10-24 19:16:30,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:16:30,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362553849] [2024-10-24 19:16:30,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:30,884 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 [2024-10-24 19:16:30,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:16:30,888 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) [2024-10-24 19:16:30,889 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 [2024-10-24 19:16:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:30,985 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-24 19:16:30,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:16:31,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:16:31,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:16:31,187 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:16:31,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362553849] [2024-10-24 19:16:31,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362553849] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:16:31,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:16:31,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2024-10-24 19:16:31,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184384604] [2024-10-24 19:16:31,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:16:31,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-24 19:16:31,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:16:31,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-24 19:16:31,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-24 19:16:31,444 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2024-10-24 19:16:31,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 173 transitions, 915 flow. Second operand has 11 states, 11 states have (on average 48.09090909090909) internal successors, (529), 11 states have internal predecessors, (529), 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) [2024-10-24 19:16:31,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:31,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2024-10-24 19:16:31,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:32,022 INFO L124 PetriNetUnfolderBase]: 789/2382 cut-off events. [2024-10-24 19:16:32,022 INFO L125 PetriNetUnfolderBase]: For 216/216 co-relation queries the response was YES. [2024-10-24 19:16:32,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4245 conditions, 2382 events. 789/2382 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19961 event pairs, 450 based on Foata normal form. 4/1820 useless extension candidates. Maximal degree in co-relation 4135. Up to 667 conditions per place. [2024-10-24 19:16:32,037 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 110 selfloop transitions, 81 changer transitions 0/230 dead transitions. [2024-10-24 19:16:32,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 230 transitions, 1612 flow [2024-10-24 19:16:32,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 19:16:32,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 19:16:32,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 485 transitions. [2024-10-24 19:16:32,039 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6571815718157181 [2024-10-24 19:16:32,039 INFO L175 Difference]: Start difference. First operand has 127 places, 173 transitions, 915 flow. Second operand 9 states and 485 transitions. [2024-10-24 19:16:32,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 230 transitions, 1612 flow [2024-10-24 19:16:32,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 230 transitions, 1598 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:16:32,047 INFO L231 Difference]: Finished difference. Result has 133 places, 205 transitions, 1299 flow [2024-10-24 19:16:32,047 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=895, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1299, PETRI_PLACES=133, PETRI_TRANSITIONS=205} [2024-10-24 19:16:32,048 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 55 predicate places. [2024-10-24 19:16:32,048 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 205 transitions, 1299 flow [2024-10-24 19:16:32,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 48.09090909090909) internal successors, (529), 11 states have internal predecessors, (529), 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) [2024-10-24 19:16:32,049 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:32,049 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:16:32,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-10-24 19:16:32,249 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 [2024-10-24 19:16:32,250 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-10-24 19:16:32,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:32,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1090143385, now seen corresponding path program 1 times [2024-10-24 19:16:32,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:16:32,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563289398] [2024-10-24 19:16:32,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:32,251 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 [2024-10-24 19:16:32,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:16:32,252 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) [2024-10-24 19:16:32,253 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 [2024-10-24 19:16:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:32,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-24 19:16:32,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:32,393 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 [2024-10-24 19:16:32,405 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 [2024-10-24 19:16:32,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:16:32,516 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 18 treesize of output 13 [2024-10-24 19:16:32,540 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-24 19:16:32,540 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 [2024-10-24 19:16:32,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:16:32,644 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 18 treesize of output 13 [2024-10-24 19:16:32,677 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-24 19:16:32,678 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 [2024-10-24 19:16:32,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:16:32,754 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 18 treesize of output 13 [2024-10-24 19:16:32,764 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:16:32,765 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 [2024-10-24 19:16:32,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 19:16:32,857 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:16:36,962 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvmul c_~id_0~0 (_ bv4 32)))) (let ((.cse1 (bvadd .cse0 (_ bv4 32) c_~get_2~0.offset))) (and (or (forall ((|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_134| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_134|)))) (bvule (bvadd .cse0 c_~get_2~0.offset) .cse1)) (forall ((|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_134| (_ BitVec 32))) (or (forall ((v_ArrVal_166 (_ BitVec 32))) (bvule .cse1 (select (store |c_#length| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_134| v_ArrVal_166) c_~get_2~0.base))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_134|)))))))) is different from false [2024-10-24 19:16:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 19:16:39,796 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:16:39,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563289398] [2024-10-24 19:16:39,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563289398] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:16:39,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:16:39,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 10 [2024-10-24 19:16:39,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789361612] [2024-10-24 19:16:39,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:16:39,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:16:39,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:16:39,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:16:39,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=81, Unknown=1, NotChecked=18, Total=132 [2024-10-24 19:16:39,907 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 82 [2024-10-24 19:16:39,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 205 transitions, 1299 flow. Second operand has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 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) [2024-10-24 19:16:39,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:39,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 82 [2024-10-24 19:16:39,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:46,945 INFO L124 PetriNetUnfolderBase]: 3795/6961 cut-off events. [2024-10-24 19:16:46,945 INFO L125 PetriNetUnfolderBase]: For 314/314 co-relation queries the response was YES. [2024-10-24 19:16:46,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14251 conditions, 6961 events. 3795/6961 cut-off events. For 314/314 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 53501 event pairs, 2948 based on Foata normal form. 0/4399 useless extension candidates. Maximal degree in co-relation 14107. Up to 3215 conditions per place. [2024-10-24 19:16:46,985 INFO L140 encePairwiseOnDemand]: 65/82 looper letters, 263 selfloop transitions, 90 changer transitions 0/362 dead transitions. [2024-10-24 19:16:46,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 362 transitions, 2948 flow [2024-10-24 19:16:46,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:16:46,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:16:46,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 294 transitions. [2024-10-24 19:16:46,989 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.29878048780487804 [2024-10-24 19:16:46,989 INFO L175 Difference]: Start difference. First operand has 133 places, 205 transitions, 1299 flow. Second operand 12 states and 294 transitions. [2024-10-24 19:16:46,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 362 transitions, 2948 flow [2024-10-24 19:16:46,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 362 transitions, 2947 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:16:47,003 INFO L231 Difference]: Finished difference. Result has 142 places, 247 transitions, 1812 flow [2024-10-24 19:16:47,004 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1812, PETRI_PLACES=142, PETRI_TRANSITIONS=247} [2024-10-24 19:16:47,005 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 64 predicate places. [2024-10-24 19:16:47,005 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 247 transitions, 1812 flow [2024-10-24 19:16:47,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.5) internal successors, (162), 12 states have internal predecessors, (162), 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) [2024-10-24 19:16:47,006 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:47,006 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:16:47,013 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 [2024-10-24 19:16:47,206 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 [2024-10-24 19:16:47,207 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-10-24 19:16:47,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:47,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1090026194, now seen corresponding path program 1 times [2024-10-24 19:16:47,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:16:47,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275769423] [2024-10-24 19:16:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:47,209 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 [2024-10-24 19:16:47,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:16:47,212 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) [2024-10-24 19:16:47,213 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 [2024-10-24 19:16:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:47,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 19:16:47,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:47,337 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 5 [2024-10-24 19:16:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 19:16:47,430 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:16:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 19:16:47,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:16:47,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275769423] [2024-10-24 19:16:47,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275769423] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:16:47,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:16:47,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2024-10-24 19:16:47,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246792030] [2024-10-24 19:16:47,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:16:47,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-24 19:16:47,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:16:47,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-24 19:16:47,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-10-24 19:16:48,710 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-10-24 19:16:48,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 247 transitions, 1812 flow. Second operand has 11 states, 11 states have (on average 46.63636363636363) internal successors, (513), 11 states have internal predecessors, (513), 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) [2024-10-24 19:16:48,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:48,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-10-24 19:16:48,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:16:51,584 INFO L124 PetriNetUnfolderBase]: 941/2735 cut-off events. [2024-10-24 19:16:51,584 INFO L125 PetriNetUnfolderBase]: For 625/649 co-relation queries the response was YES. [2024-10-24 19:16:51,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5869 conditions, 2735 events. 941/2735 cut-off events. For 625/649 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 22992 event pairs, 498 based on Foata normal form. 24/2209 useless extension candidates. Maximal degree in co-relation 5703. Up to 1518 conditions per place. [2024-10-24 19:16:51,602 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 139 selfloop transitions, 111 changer transitions 0/283 dead transitions. [2024-10-24 19:16:51,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 283 transitions, 2656 flow [2024-10-24 19:16:51,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 19:16:51,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-24 19:16:51,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 725 transitions. [2024-10-24 19:16:51,606 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-10-24 19:16:51,606 INFO L175 Difference]: Start difference. First operand has 142 places, 247 transitions, 1812 flow. Second operand 15 states and 725 transitions. [2024-10-24 19:16:51,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 283 transitions, 2656 flow [2024-10-24 19:16:51,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 283 transitions, 2651 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:16:51,644 INFO L231 Difference]: Finished difference. Result has 158 places, 283 transitions, 2453 flow [2024-10-24 19:16:51,644 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1807, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2453, PETRI_PLACES=158, PETRI_TRANSITIONS=283} [2024-10-24 19:16:51,645 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 80 predicate places. [2024-10-24 19:16:51,645 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 283 transitions, 2453 flow [2024-10-24 19:16:51,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.63636363636363) internal successors, (513), 11 states have internal predecessors, (513), 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) [2024-10-24 19:16:51,646 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:16:51,646 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:16:51,652 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 [2024-10-24 19:16:51,846 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 [2024-10-24 19:16:51,847 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-10-24 19:16:51,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:16:51,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1100301562, now seen corresponding path program 1 times [2024-10-24 19:16:51,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:16:51,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224189442] [2024-10-24 19:16:51,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:16:51,849 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 [2024-10-24 19:16:51,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:16:51,851 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) [2024-10-24 19:16:51,852 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 [2024-10-24 19:16:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:16:51,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 19:16:51,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:16:51,959 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 5 [2024-10-24 19:16:52,133 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:16:52,133 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:16:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:16:52,641 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:16:52,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224189442] [2024-10-24 19:16:52,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224189442] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:16:52,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:16:52,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2024-10-24 19:16:52,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306730137] [2024-10-24 19:16:52,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:16:52,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 19:16:52,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:16:52,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 19:16:52,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-10-24 19:16:55,019 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2024-10-24 19:16:55,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 283 transitions, 2453 flow. Second operand has 15 states, 15 states have (on average 46.266666666666666) internal successors, (694), 15 states have internal predecessors, (694), 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) [2024-10-24 19:16:55,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:16:55,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2024-10-24 19:16:55,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:04,010 INFO L124 PetriNetUnfolderBase]: 977/2843 cut-off events. [2024-10-24 19:17:04,010 INFO L125 PetriNetUnfolderBase]: For 1092/1116 co-relation queries the response was YES. [2024-10-24 19:17:04,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6770 conditions, 2843 events. 977/2843 cut-off events. For 1092/1116 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 24278 event pairs, 498 based on Foata normal form. 36/2329 useless extension candidates. Maximal degree in co-relation 6595. Up to 1541 conditions per place. [2024-10-24 19:17:04,030 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 151 selfloop transitions, 159 changer transitions 0/343 dead transitions. [2024-10-24 19:17:04,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 343 transitions, 3625 flow [2024-10-24 19:17:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-24 19:17:04,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-24 19:17:04,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1097 transitions. [2024-10-24 19:17:04,035 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5816542948038176 [2024-10-24 19:17:04,035 INFO L175 Difference]: Start difference. First operand has 158 places, 283 transitions, 2453 flow. Second operand 23 states and 1097 transitions. [2024-10-24 19:17:04,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 343 transitions, 3625 flow [2024-10-24 19:17:04,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 343 transitions, 3411 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-10-24 19:17:04,060 INFO L231 Difference]: Finished difference. Result has 182 places, 343 transitions, 3227 flow [2024-10-24 19:17:04,060 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3227, PETRI_PLACES=182, PETRI_TRANSITIONS=343} [2024-10-24 19:17:04,061 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 104 predicate places. [2024-10-24 19:17:04,061 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 343 transitions, 3227 flow [2024-10-24 19:17:04,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 46.266666666666666) internal successors, (694), 15 states have internal predecessors, (694), 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) [2024-10-24 19:17:04,062 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:04,062 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:04,067 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 [2024-10-24 19:17:04,262 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 [2024-10-24 19:17:04,263 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-10-24 19:17:04,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:04,263 INFO L85 PathProgramCache]: Analyzing trace with hash -565292459, now seen corresponding path program 1 times [2024-10-24 19:17:04,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:04,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399070485] [2024-10-24 19:17:04,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:04,264 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 [2024-10-24 19:17:04,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:04,265 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) [2024-10-24 19:17:04,266 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 [2024-10-24 19:17:04,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:04,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 19:17:04,392 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:04,396 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 [2024-10-24 19:17:04,420 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-24 19:17:04,420 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 [2024-10-24 19:17:04,438 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-24 19:17:04,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-10-24 19:17:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 19:17:04,453 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:17:04,453 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:04,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399070485] [2024-10-24 19:17:04,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399070485] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:17:04,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:17:04,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:17:04,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185342947] [2024-10-24 19:17:04,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:17:04,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:17:04,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:04,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:17:04,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:17:04,530 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 82 [2024-10-24 19:17:04,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 343 transitions, 3227 flow. Second operand has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 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) [2024-10-24 19:17:04,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:04,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 82 [2024-10-24 19:17:04,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:04,960 INFO L124 PetriNetUnfolderBase]: 1085/2841 cut-off events. [2024-10-24 19:17:04,960 INFO L125 PetriNetUnfolderBase]: For 1056/1080 co-relation queries the response was YES. [2024-10-24 19:17:04,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7126 conditions, 2841 events. 1085/2841 cut-off events. For 1056/1080 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 22893 event pairs, 582 based on Foata normal form. 0/2501 useless extension candidates. Maximal degree in co-relation 6943. Up to 1864 conditions per place. [2024-10-24 19:17:04,976 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 288 selfloop transitions, 21 changer transitions 0/339 dead transitions. [2024-10-24 19:17:04,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 339 transitions, 3837 flow [2024-10-24 19:17:04,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:17:04,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:17:04,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2024-10-24 19:17:04,978 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-10-24 19:17:04,978 INFO L175 Difference]: Start difference. First operand has 182 places, 343 transitions, 3227 flow. Second operand 4 states and 195 transitions. [2024-10-24 19:17:04,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 339 transitions, 3837 flow [2024-10-24 19:17:04,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 339 transitions, 3581 flow, removed 66 selfloop flow, removed 9 redundant places. [2024-10-24 19:17:04,998 INFO L231 Difference]: Finished difference. Result has 172 places, 339 transitions, 3005 flow [2024-10-24 19:17:04,999 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=2963, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3005, PETRI_PLACES=172, PETRI_TRANSITIONS=339} [2024-10-24 19:17:04,999 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 94 predicate places. [2024-10-24 19:17:04,999 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 339 transitions, 3005 flow [2024-10-24 19:17:05,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 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) [2024-10-24 19:17:05,000 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:05,000 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:05,035 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 [2024-10-24 19:17:05,200 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 [2024-10-24 19:17:05,201 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-10-24 19:17:05,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:05,202 INFO L85 PathProgramCache]: Analyzing trace with hash -565292458, now seen corresponding path program 1 times [2024-10-24 19:17:05,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:05,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430493684] [2024-10-24 19:17:05,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:05,203 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 [2024-10-24 19:17:05,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:05,206 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) [2024-10-24 19:17:05,207 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 [2024-10-24 19:17:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:05,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-24 19:17:05,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:05,383 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 [2024-10-24 19:17:05,393 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 [2024-10-24 19:17:05,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:17:05,507 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 18 treesize of output 13 [2024-10-24 19:17:05,527 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-24 19:17:05,527 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 [2024-10-24 19:17:05,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:17:05,611 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 18 treesize of output 13 [2024-10-24 19:17:05,619 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:17:05,619 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 [2024-10-24 19:17:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 19:17:05,709 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:17:06,941 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-24 19:17:06,942 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-24 19:17:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 19:17:06,946 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:06,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430493684] [2024-10-24 19:17:06,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430493684] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:17:06,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:17:06,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2024-10-24 19:17:06,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686559400] [2024-10-24 19:17:06,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:17:06,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:17:06,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:06,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:17:06,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-24 19:17:11,400 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] [2024-10-24 19:17:15,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-24 19:17:22,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-24 19:17:24,109 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 82 [2024-10-24 19:17:24,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 339 transitions, 3005 flow. Second operand has 12 states, 12 states have (on average 22.666666666666668) internal successors, (272), 12 states have internal predecessors, (272), 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) [2024-10-24 19:17:24,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:17:24,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 82 [2024-10-24 19:17:24,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:17:26,414 INFO L124 PetriNetUnfolderBase]: 1845/4001 cut-off events. [2024-10-24 19:17:26,415 INFO L125 PetriNetUnfolderBase]: For 1615/1671 co-relation queries the response was YES. [2024-10-24 19:17:26,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10298 conditions, 4001 events. 1845/4001 cut-off events. For 1615/1671 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 30909 event pairs, 1159 based on Foata normal form. 0/3321 useless extension candidates. Maximal degree in co-relation 10111. Up to 1563 conditions per place. [2024-10-24 19:17:26,437 INFO L140 encePairwiseOnDemand]: 69/82 looper letters, 367 selfloop transitions, 94 changer transitions 0/476 dead transitions. [2024-10-24 19:17:26,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 476 transitions, 5059 flow [2024-10-24 19:17:26,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 19:17:26,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 19:17:26,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 300 transitions. [2024-10-24 19:17:26,439 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-10-24 19:17:26,439 INFO L175 Difference]: Start difference. First operand has 172 places, 339 transitions, 3005 flow. Second operand 9 states and 300 transitions. [2024-10-24 19:17:26,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 476 transitions, 5059 flow [2024-10-24 19:17:26,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 476 transitions, 5037 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:17:26,498 INFO L231 Difference]: Finished difference. Result has 179 places, 339 transitions, 3269 flow [2024-10-24 19:17:26,499 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=2979, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3269, PETRI_PLACES=179, PETRI_TRANSITIONS=339} [2024-10-24 19:17:26,499 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 101 predicate places. [2024-10-24 19:17:26,500 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 339 transitions, 3269 flow [2024-10-24 19:17:26,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 22.666666666666668) internal successors, (272), 12 states have internal predecessors, (272), 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) [2024-10-24 19:17:26,500 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:17:26,500 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:17:26,507 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 [2024-10-24 19:17:26,701 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 [2024-10-24 19:17:26,701 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2024-10-24 19:17:26,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:17:26,702 INFO L85 PathProgramCache]: Analyzing trace with hash -344196036, now seen corresponding path program 1 times [2024-10-24 19:17:26,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:17:26,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245428117] [2024-10-24 19:17:26,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:17:26,703 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 [2024-10-24 19:17:26,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:17:26,706 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) [2024-10-24 19:17:26,707 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 [2024-10-24 19:17:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:17:26,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-24 19:17:26,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:17:26,956 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 [2024-10-24 19:17:26,965 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 [2024-10-24 19:17:27,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:17:27,050 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 [2024-10-24 19:17:27,059 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:17:27,059 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 [2024-10-24 19:17:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 19:17:27,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:17:31,375 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-24 19:17:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 19:17:31,571 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:17:31,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245428117] [2024-10-24 19:17:31,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245428117] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:17:31,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:17:31,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-24 19:17:31,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284534421] [2024-10-24 19:17:31,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:17:31,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:17:31,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:17:31,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:17:31,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=89, Unknown=1, NotChecked=0, Total=132