./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.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 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:59:04,194 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:59:04,273 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:59:04,278 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:59:04,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:59:04,306 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:59:04,307 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:59:04,308 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:59:04,309 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:59:04,310 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:59:04,310 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:59:04,310 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:59:04,312 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:59:04,314 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:59:04,314 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:59:04,314 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:59:04,315 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:59:04,315 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:59:04,315 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:59:04,316 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:59:04,316 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:59:04,320 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:59:04,320 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:59:04,320 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:59:04,320 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:59:04,321 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:59:04,321 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:59:04,321 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:59:04,321 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:59:04,321 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:59:04,322 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:59:04,322 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:59:04,322 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:59:04,322 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:59:04,323 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:59:04,323 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:59:04,325 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:59:04,325 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:59:04,326 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:59:04,326 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:59:04,326 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:59:04,326 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:59:04,327 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2024-10-14 19:59:04,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:59:04,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:59:04,617 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:59:04,618 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:59:04,619 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:59:04,620 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-10-14 19:59:06,123 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:59:06,320 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:59:06,321 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-10-14 19:59:06,335 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ac35e9d0/d50056b3315d4e5996db794f0d824419/FLAG06deb7523 [2024-10-14 19:59:06,351 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ac35e9d0/d50056b3315d4e5996db794f0d824419 [2024-10-14 19:59:06,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:59:06,356 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:59:06,358 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:59:06,358 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:59:06,364 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:59:06,365 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:59:06" (1/1) ... [2024-10-14 19:59:06,368 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22fbab9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:06, skipping insertion in model container [2024-10-14 19:59:06,368 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:59:06" (1/1) ... [2024-10-14 19:59:06,396 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:59:06,599 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:59:06,612 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-10-14 19:59:06,613 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@682421df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:06, skipping insertion in model container [2024-10-14 19:59:06,613 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:59:06,614 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-14 19:59:06,616 INFO L158 Benchmark]: Toolchain (without parser) took 258.90ms. Allocated memory is still 165.7MB. Free memory was 96.1MB in the beginning and 84.9MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-14 19:59:06,617 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 165.7MB. Free memory is still 123.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 19:59:06,617 INFO L158 Benchmark]: CACSL2BoogieTranslator took 255.46ms. Allocated memory is still 165.7MB. Free memory was 95.7MB in the beginning and 85.1MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-14 19:59:06,619 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 165.7MB. Free memory is still 123.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 255.46ms. Allocated memory is still 165.7MB. Free memory was 95.7MB in the beginning and 85.1MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 123]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.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 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:59:08,675 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:59:08,738 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-14 19:59:08,745 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:59:08,746 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:59:08,783 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:59:08,785 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:59:08,785 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:59:08,786 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:59:08,786 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:59:08,787 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:59:08,787 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:59:08,788 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:59:08,788 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:59:08,788 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:59:08,789 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:59:08,789 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:59:08,789 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:59:08,790 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:59:08,790 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:59:08,790 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:59:08,794 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:59:08,795 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:59:08,795 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:59:08,795 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:59:08,795 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-14 19:59:08,795 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:59:08,796 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-14 19:59:08,796 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:59:08,796 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:59:08,796 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:59:08,796 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:59:08,797 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:59:08,797 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:59:08,803 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:59:08,803 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:59:08,803 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:59:08,803 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:59:08,804 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-14 19:59:08,804 INFO L153 SettingsManager]: * Command for external solver=cvc5 --incremental --print-success --lang smt [2024-10-14 19:59:08,804 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:59:08,808 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:59:08,808 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:59:08,809 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:59:08,809 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-14 19:59:08,809 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2024-10-14 19:59:09,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:59:09,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:59:09,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:59:09,130 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:59:09,130 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:59:09,131 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-10-14 19:59:10,683 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:59:10,875 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:59:10,876 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-10-14 19:59:10,883 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15e5a61d5/f16910eb810f414eb5ad22641a660900/FLAGd8deb5a00 [2024-10-14 19:59:10,894 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15e5a61d5/f16910eb810f414eb5ad22641a660900 [2024-10-14 19:59:10,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:59:10,897 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:59:10,898 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:59:10,898 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:59:10,904 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:59:10,904 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:59:10" (1/1) ... [2024-10-14 19:59:10,905 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64d2819f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:10, skipping insertion in model container [2024-10-14 19:59:10,905 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:59:10" (1/1) ... [2024-10-14 19:59:10,934 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:59:11,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:59:11,170 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-14 19:59:11,176 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:59:11,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:59:11,214 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:59:11,249 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:59:11,271 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:59:11,271 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:11 WrapperNode [2024-10-14 19:59:11,272 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:59:11,273 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:59:11,273 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:59:11,273 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:59:11,280 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:11" (1/1) ... [2024-10-14 19:59:11,297 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:11" (1/1) ... [2024-10-14 19:59:11,334 INFO L138 Inliner]: procedures = 27, calls = 43, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 217 [2024-10-14 19:59:11,334 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:59:11,335 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:59:11,336 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:59:11,336 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:59:11,346 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:11" (1/1) ... [2024-10-14 19:59:11,346 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:11" (1/1) ... [2024-10-14 19:59:11,351 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:11" (1/1) ... [2024-10-14 19:59:11,383 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-10-14 19:59:11,383 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:11" (1/1) ... [2024-10-14 19:59:11,383 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:11" (1/1) ... [2024-10-14 19:59:11,396 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:11" (1/1) ... [2024-10-14 19:59:11,407 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:11" (1/1) ... [2024-10-14 19:59:11,413 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:11" (1/1) ... [2024-10-14 19:59:11,414 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:11" (1/1) ... [2024-10-14 19:59:11,431 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:59:11,433 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:59:11,433 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:59:11,433 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:59:11,434 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:11" (1/1) ... [2024-10-14 19:59:11,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:59:11,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:59:11,471 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 19:59:11,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 19:59:11,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:59:11,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-14 19:59:11,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-14 19:59:11,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-14 19:59:11,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-14 19:59:11,523 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 19:59:11,524 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 19:59:11,524 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 19:59:11,524 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 19:59:11,524 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-14 19:59:11,524 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-14 19:59:11,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 19:59:11,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 19:59:11,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 19:59:11,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:59:11,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:59:11,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-14 19:59:11,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-14 19:59:11,528 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 19:59:11,678 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:59:11,680 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:59:12,421 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:59:12,421 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:59:12,876 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:59:12,877 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-14 19:59:12,878 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:59:12 BoogieIcfgContainer [2024-10-14 19:59:12,878 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:59:12,881 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:59:12,881 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:59:12,884 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:59:12,884 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:59:10" (1/3) ... [2024-10-14 19:59:12,885 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d40280d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:59:12, skipping insertion in model container [2024-10-14 19:59:12,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:59:11" (2/3) ... [2024-10-14 19:59:12,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d40280d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:59:12, skipping insertion in model container [2024-10-14 19:59:12,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:59:12" (3/3) ... [2024-10-14 19:59:12,888 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2024-10-14 19:59:12,907 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:59:12,907 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-10-14 19:59:12,907 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:59:13,007 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-14 19:59:13,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 199 flow [2024-10-14 19:59:13,087 INFO L124 PetriNetUnfolderBase]: 9/86 cut-off events. [2024-10-14 19:59:13,087 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-14 19:59:13,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 86 events. 9/86 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 245 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2024-10-14 19:59:13,093 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 199 flow [2024-10-14 19:59:13,097 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 85 transitions, 188 flow [2024-10-14 19:59:13,109 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:59:13,117 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;@5b380e31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:59:13,117 INFO L334 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2024-10-14 19:59:13,120 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:59:13,120 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-14 19:59:13,120 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:59:13,120 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:13,121 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:59:13,121 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-14 19:59:13,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:13,127 INFO L85 PathProgramCache]: Analyzing trace with hash 890806, now seen corresponding path program 1 times [2024-10-14 19:59:13,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:13,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915711070] [2024-10-14 19:59:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:13,139 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:13,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:13,143 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:59:13,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-14 19:59:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:13,228 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:59:13,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:13,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:59:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:59:13,310 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:59:13,310 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:13,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915711070] [2024-10-14 19:59:13,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1915711070] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:59:13,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:59:13,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:59:13,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913471859] [2024-10-14 19:59:13,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:59:13,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:59:13,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:13,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:59:13,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:59:13,418 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-10-14 19:59:13,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:13,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:13,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-10-14 19:59:13,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:14,347 INFO L124 PetriNetUnfolderBase]: 2958/4643 cut-off events. [2024-10-14 19:59:14,347 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-10-14 19:59:14,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8763 conditions, 4643 events. 2958/4643 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29831 event pairs, 2134 based on Foata normal form. 1/3246 useless extension candidates. Maximal degree in co-relation 8227. Up to 3883 conditions per place. [2024-10-14 19:59:14,393 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 46 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-10-14 19:59:14,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 270 flow [2024-10-14 19:59:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:59:14,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:59:14,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2024-10-14 19:59:14,407 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5842696629213483 [2024-10-14 19:59:14,409 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 188 flow. Second operand 3 states and 156 transitions. [2024-10-14 19:59:14,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 270 flow [2024-10-14 19:59:14,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 258 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-14 19:59:14,425 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 166 flow [2024-10-14 19:59:14,426 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-10-14 19:59:14,431 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -11 predicate places. [2024-10-14 19:59:14,431 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 166 flow [2024-10-14 19:59:14,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:14,431 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:14,432 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:59:14,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2024-10-14 19:59:14,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:14,633 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-14 19:59:14,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:14,633 INFO L85 PathProgramCache]: Analyzing trace with hash 890807, now seen corresponding path program 1 times [2024-10-14 19:59:14,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:14,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [862057873] [2024-10-14 19:59:14,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:14,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:14,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:14,638 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:59:14,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-14 19:59:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:14,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:59:14,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:14,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:59:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:59:14,883 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:59:14,883 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:14,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [862057873] [2024-10-14 19:59:14,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [862057873] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:59:14,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:59:14,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:59:14,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459285379] [2024-10-14 19:59:14,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:59:14,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:59:14,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:14,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:59:14,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:59:15,015 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-10-14 19:59:15,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 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) [2024-10-14 19:59:15,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:15,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-10-14 19:59:15,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:15,945 INFO L124 PetriNetUnfolderBase]: 2960/4651 cut-off events. [2024-10-14 19:59:15,945 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-10-14 19:59:15,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8637 conditions, 4651 events. 2960/4651 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29944 event pairs, 2134 based on Foata normal form. 0/3250 useless extension candidates. Maximal degree in co-relation 8589. Up to 3896 conditions per place. [2024-10-14 19:59:15,976 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 50 selfloop transitions, 9 changer transitions 0/86 dead transitions. [2024-10-14 19:59:15,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 302 flow [2024-10-14 19:59:15,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:59:15,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:59:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 199 transitions. [2024-10-14 19:59:15,980 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5589887640449438 [2024-10-14 19:59:15,980 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 166 flow. Second operand 4 states and 199 transitions. [2024-10-14 19:59:15,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 302 flow [2024-10-14 19:59:15,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 86 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:59:15,983 INFO L231 Difference]: Finished difference. Result has 79 places, 85 transitions, 232 flow [2024-10-14 19:59:15,983 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=79, PETRI_TRANSITIONS=85} [2024-10-14 19:59:15,984 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -7 predicate places. [2024-10-14 19:59:15,984 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 85 transitions, 232 flow [2024-10-14 19:59:15,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 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) [2024-10-14 19:59:15,985 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:15,985 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-14 19:59:15,989 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 [2024-10-14 19:59:16,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:16,186 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-14 19:59:16,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:16,187 INFO L85 PathProgramCache]: Analyzing trace with hash 856094317, now seen corresponding path program 1 times [2024-10-14 19:59:16,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:16,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124533776] [2024-10-14 19:59:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:16,188 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:16,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:16,191 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:59:16,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-14 19:59:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:16,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 19:59:16,251 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:16,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:59:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:59:16,445 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:59:16,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:59:16,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:16,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124533776] [2024-10-14 19:59:16,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124533776] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:59:16,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:59:16,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:59:16,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222232967] [2024-10-14 19:59:16,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:59:16,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:59:16,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:16,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:59:16,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:59:17,290 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-10-14 19:59:17,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 85 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:17,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:17,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-10-14 19:59:17,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:19,677 INFO L124 PetriNetUnfolderBase]: 2969/4678 cut-off events. [2024-10-14 19:59:19,677 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-10-14 19:59:19,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8748 conditions, 4678 events. 2969/4678 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 30061 event pairs, 2134 based on Foata normal form. 0/3276 useless extension candidates. Maximal degree in co-relation 8602. Up to 3899 conditions per place. [2024-10-14 19:59:19,712 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 50 selfloop transitions, 36 changer transitions 0/113 dead transitions. [2024-10-14 19:59:19,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 113 transitions, 520 flow [2024-10-14 19:59:19,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 19:59:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 19:59:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 435 transitions. [2024-10-14 19:59:19,718 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4887640449438202 [2024-10-14 19:59:19,721 INFO L175 Difference]: Start difference. First operand has 79 places, 85 transitions, 232 flow. Second operand 10 states and 435 transitions. [2024-10-14 19:59:19,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 113 transitions, 520 flow [2024-10-14 19:59:19,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 113 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:59:19,724 INFO L231 Difference]: Finished difference. Result has 91 places, 113 transitions, 472 flow [2024-10-14 19:59:19,724 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=472, PETRI_PLACES=91, PETRI_TRANSITIONS=113} [2024-10-14 19:59:19,725 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 5 predicate places. [2024-10-14 19:59:19,725 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 113 transitions, 472 flow [2024-10-14 19:59:19,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:19,726 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:19,726 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:59:19,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-10-14 19:59:19,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:19,929 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-14 19:59:19,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:19,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1927014644, now seen corresponding path program 1 times [2024-10-14 19:59:19,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:19,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121260052] [2024-10-14 19:59:19,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:19,930 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:19,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:19,931 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:59:19,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-14 19:59:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:19,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 19:59:19,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:59:20,136 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:59:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:59:20,262 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:20,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121260052] [2024-10-14 19:59:20,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121260052] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:59:20,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:59:20,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-14 19:59:20,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900930947] [2024-10-14 19:59:20,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:59:20,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:59:20,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:20,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:59:20,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:59:20,401 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-10-14 19:59:20,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 113 transitions, 472 flow. Second operand has 10 states, 10 states have (on average 38.1) internal successors, (381), 10 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:20,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:20,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-10-14 19:59:20,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:22,313 INFO L124 PetriNetUnfolderBase]: 5923/9314 cut-off events. [2024-10-14 19:59:22,314 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2024-10-14 19:59:22,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17430 conditions, 9314 events. 5923/9314 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 66094 event pairs, 4268 based on Foata normal form. 4/6536 useless extension candidates. Maximal degree in co-relation 8736. Up to 3890 conditions per place. [2024-10-14 19:59:22,375 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 84 selfloop transitions, 43 changer transitions 0/157 dead transitions. [2024-10-14 19:59:22,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 157 transitions, 856 flow [2024-10-14 19:59:22,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 19:59:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 19:59:22,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 535 transitions. [2024-10-14 19:59:22,379 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5464759959141982 [2024-10-14 19:59:22,379 INFO L175 Difference]: Start difference. First operand has 91 places, 113 transitions, 472 flow. Second operand 11 states and 535 transitions. [2024-10-14 19:59:22,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 157 transitions, 856 flow [2024-10-14 19:59:22,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 157 transitions, 757 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-10-14 19:59:22,387 INFO L231 Difference]: Finished difference. Result has 100 places, 117 transitions, 524 flow [2024-10-14 19:59:22,388 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=524, PETRI_PLACES=100, PETRI_TRANSITIONS=117} [2024-10-14 19:59:22,388 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 14 predicate places. [2024-10-14 19:59:22,388 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 117 transitions, 524 flow [2024-10-14 19:59:22,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 38.1) internal successors, (381), 10 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:22,389 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:22,389 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:59:22,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-14 19:59:22,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:22,590 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-14 19:59:22,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:22,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2129895855, now seen corresponding path program 1 times [2024-10-14 19:59:22,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:22,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536756427] [2024-10-14 19:59:22,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:22,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:22,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:22,597 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:59:22,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-14 19:59:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:22,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:59:22,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:22,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:59:22,767 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-14 19:59:22,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-10-14 19:59:22,803 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-14 19:59:22,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-10-14 19:59:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 19:59:22,820 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:59:22,820 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:22,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536756427] [2024-10-14 19:59:22,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536756427] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:59:22,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:59:22,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:59:22,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273835300] [2024-10-14 19:59:22,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:59:22,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:59:22,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:22,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:59:22,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:59:22,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 89 [2024-10-14 19:59:22,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 117 transitions, 524 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:22,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:22,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 89 [2024-10-14 19:59:22,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:23,983 INFO L124 PetriNetUnfolderBase]: 5989/9760 cut-off events. [2024-10-14 19:59:23,984 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2024-10-14 19:59:24,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18000 conditions, 9760 events. 5989/9760 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 69902 event pairs, 4376 based on Foata normal form. 0/6910 useless extension candidates. Maximal degree in co-relation 9046. Up to 7875 conditions per place. [2024-10-14 19:59:24,043 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 78 selfloop transitions, 10 changer transitions 0/112 dead transitions. [2024-10-14 19:59:24,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 112 transitions, 690 flow [2024-10-14 19:59:24,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:59:24,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:59:24,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 194 transitions. [2024-10-14 19:59:24,046 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43595505617977526 [2024-10-14 19:59:24,046 INFO L175 Difference]: Start difference. First operand has 100 places, 117 transitions, 524 flow. Second operand 5 states and 194 transitions. [2024-10-14 19:59:24,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 112 transitions, 690 flow [2024-10-14 19:59:24,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 112 transitions, 648 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-14 19:59:24,051 INFO L231 Difference]: Finished difference. Result has 94 places, 112 transitions, 492 flow [2024-10-14 19:59:24,055 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=492, PETRI_PLACES=94, PETRI_TRANSITIONS=112} [2024-10-14 19:59:24,056 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 8 predicate places. [2024-10-14 19:59:24,056 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 112 transitions, 492 flow [2024-10-14 19:59:24,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:24,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:24,057 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:59:24,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-10-14 19:59:24,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:24,258 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-14 19:59:24,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:24,259 INFO L85 PathProgramCache]: Analyzing trace with hash -2129895854, now seen corresponding path program 1 times [2024-10-14 19:59:24,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:24,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506097114] [2024-10-14 19:59:24,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:59:24,260 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:24,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:24,263 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:59:24,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-14 19:59:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:59:24,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-14 19:59:24,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:24,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:59:24,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:59:24,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:59:24,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 19:59:24,582 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:59:24,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-14 19:59:24,651 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-10-14 19:59:24,652 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 16 treesize of output 18 [2024-10-14 19:59:24,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:59:24,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:59:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:59:25,336 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:25,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506097114] [2024-10-14 19:59:25,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506097114] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:59:25,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:59:25,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-14 19:59:25,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721495293] [2024-10-14 19:59:25,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:59:25,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 19:59:25,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:25,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 19:59:25,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-10-14 19:59:28,497 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 89 [2024-10-14 19:59:28,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 112 transitions, 492 flow. Second operand has 12 states, 12 states have (on average 29.833333333333332) internal successors, (358), 12 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:28,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:28,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 89 [2024-10-14 19:59:28,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:32,611 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 [1] [2024-10-14 19:59:36,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 19:59:39,547 INFO L124 PetriNetUnfolderBase]: 13328/20932 cut-off events. [2024-10-14 19:59:39,547 INFO L125 PetriNetUnfolderBase]: For 287/287 co-relation queries the response was YES. [2024-10-14 19:59:39,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39109 conditions, 20932 events. 13328/20932 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 1196. Compared 162135 event pairs, 9560 based on Foata normal form. 3/14919 useless extension candidates. Maximal degree in co-relation 23337. Up to 7006 conditions per place. [2024-10-14 19:59:39,688 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 144 selfloop transitions, 59 changer transitions 0/223 dead transitions. [2024-10-14 19:59:39,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 223 transitions, 1302 flow [2024-10-14 19:59:39,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-14 19:59:39,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-14 19:59:39,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 649 transitions. [2024-10-14 19:59:39,693 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45575842696629215 [2024-10-14 19:59:39,693 INFO L175 Difference]: Start difference. First operand has 94 places, 112 transitions, 492 flow. Second operand 16 states and 649 transitions. [2024-10-14 19:59:39,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 223 transitions, 1302 flow [2024-10-14 19:59:39,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 223 transitions, 1282 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:59:39,700 INFO L231 Difference]: Finished difference. Result has 111 places, 137 transitions, 824 flow [2024-10-14 19:59:39,700 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=824, PETRI_PLACES=111, PETRI_TRANSITIONS=137} [2024-10-14 19:59:39,703 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 25 predicate places. [2024-10-14 19:59:39,703 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 137 transitions, 824 flow [2024-10-14 19:59:39,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.833333333333332) internal successors, (358), 12 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:39,704 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:39,704 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-14 19:59:39,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-14 19:59:39,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:39,905 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-14 19:59:39,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:59:39,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1273729423, now seen corresponding path program 2 times [2024-10-14 19:59:39,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:59:39,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270966397] [2024-10-14 19:59:39,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:59:39,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:59:39,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:59:39,908 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:59:39,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-14 19:59:39,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:59:39,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:59:39,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 19:59:39,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:59:40,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:59:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:59:40,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:59:41,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:59:41,009 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:59:41,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270966397] [2024-10-14 19:59:41,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270966397] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:59:41,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:59:41,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:59:41,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354997260] [2024-10-14 19:59:41,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:59:41,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:59:41,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:59:41,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:59:41,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:59:42,692 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-10-14 19:59:42,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 137 transitions, 824 flow. Second operand has 14 states, 14 states have (on average 35.57142857142857) internal successors, (498), 14 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:42,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:59:42,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-10-14 19:59:42,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:59:55,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:59:59,687 INFO L124 PetriNetUnfolderBase]: 13358/21022 cut-off events. [2024-10-14 19:59:59,687 INFO L125 PetriNetUnfolderBase]: For 519/519 co-relation queries the response was YES. [2024-10-14 19:59:59,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39745 conditions, 21022 events. 13358/21022 cut-off events. For 519/519 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 162975 event pairs, 9560 based on Foata normal form. 30/15002 useless extension candidates. Maximal degree in co-relation 31978. Up to 17533 conditions per place. [2024-10-14 19:59:59,833 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 54 selfloop transitions, 145 changer transitions 0/221 dead transitions. [2024-10-14 19:59:59,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 221 transitions, 2086 flow [2024-10-14 19:59:59,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 19:59:59,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-14 19:59:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 905 transitions. [2024-10-14 19:59:59,837 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46220633299284986 [2024-10-14 19:59:59,838 INFO L175 Difference]: Start difference. First operand has 111 places, 137 transitions, 824 flow. Second operand 22 states and 905 transitions. [2024-10-14 19:59:59,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 221 transitions, 2086 flow [2024-10-14 19:59:59,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 221 transitions, 2086 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:59:59,852 INFO L231 Difference]: Finished difference. Result has 138 places, 221 transitions, 2096 flow [2024-10-14 19:59:59,853 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2096, PETRI_PLACES=138, PETRI_TRANSITIONS=221} [2024-10-14 19:59:59,854 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 52 predicate places. [2024-10-14 19:59:59,854 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 221 transitions, 2096 flow [2024-10-14 19:59:59,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 35.57142857142857) internal successors, (498), 14 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:59:59,855 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:59:59,855 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:59:59,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-14 20:00:00,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:00,056 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-14 20:00:00,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:00,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1602261110, now seen corresponding path program 1 times [2024-10-14 20:00:00,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:00,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656269013] [2024-10-14 20:00:00,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:00,057 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:00,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:00,059 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:00,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-14 20:00:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:00,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 20:00:00,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:00,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 20:00:00,216 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-14 20:00:00,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-10-14 20:00:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 20:00:00,240 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:00,240 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:00,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656269013] [2024-10-14 20:00:00,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656269013] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:00,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:00,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 20:00:00,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759928503] [2024-10-14 20:00:00,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:00,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 20:00:00,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:00,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 20:00:00,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 20:00:00,369 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 89 [2024-10-14 20:00:00,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 221 transitions, 2096 flow. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:00,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:00,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 89 [2024-10-14 20:00:00,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:02,283 INFO L124 PetriNetUnfolderBase]: 13783/21322 cut-off events. [2024-10-14 20:00:02,283 INFO L125 PetriNetUnfolderBase]: For 520/520 co-relation queries the response was YES. [2024-10-14 20:00:02,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40995 conditions, 21322 events. 13783/21322 cut-off events. For 520/520 co-relation queries the response was YES. Maximal size of possible extension queue 1151. Compared 158321 event pairs, 10160 based on Foata normal form. 0/15497 useless extension candidates. Maximal degree in co-relation 40733. Up to 18217 conditions per place. [2024-10-14 20:00:02,421 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 158 selfloop transitions, 38 changer transitions 0/216 dead transitions. [2024-10-14 20:00:02,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 216 transitions, 2478 flow [2024-10-14 20:00:02,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 20:00:02,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 20:00:02,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2024-10-14 20:00:02,424 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44269662921348313 [2024-10-14 20:00:02,424 INFO L175 Difference]: Start difference. First operand has 138 places, 221 transitions, 2096 flow. Second operand 5 states and 197 transitions. [2024-10-14 20:00:02,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 216 transitions, 2478 flow [2024-10-14 20:00:02,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 216 transitions, 2106 flow, removed 107 selfloop flow, removed 9 redundant places. [2024-10-14 20:00:02,436 INFO L231 Difference]: Finished difference. Result has 128 places, 216 transitions, 1790 flow [2024-10-14 20:00:02,436 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1790, PETRI_PLACES=128, PETRI_TRANSITIONS=216} [2024-10-14 20:00:02,438 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 42 predicate places. [2024-10-14 20:00:02,438 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 216 transitions, 1790 flow [2024-10-14 20:00:02,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:02,438 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:02,439 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:02,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2024-10-14 20:00:02,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:02,640 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-14 20:00:02,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:02,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1602261109, now seen corresponding path program 1 times [2024-10-14 20:00:02,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:02,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954611674] [2024-10-14 20:00:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:02,641 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:02,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:02,642 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:02,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-14 20:00:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:02,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-14 20:00:02,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:02,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 20:00:02,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 20:00:02,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 20:00:02,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 20:00:02,935 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 20:00:02,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-14 20:00:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 20:00:03,022 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:03,210 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 20:00:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 20:00:03,305 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:03,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954611674] [2024-10-14 20:00:03,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954611674] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:00:03,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:00:03,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-14 20:00:03,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769144442] [2024-10-14 20:00:03,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:00:03,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 20:00:03,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:03,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 20:00:03,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-10-14 20:00:04,564 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 89 [2024-10-14 20:00:04,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 216 transitions, 1790 flow. Second operand has 12 states, 12 states have (on average 34.0) internal successors, (408), 12 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:04,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:04,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 89 [2024-10-14 20:00:04,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:13,207 INFO L124 PetriNetUnfolderBase]: 11904/18760 cut-off events. [2024-10-14 20:00:13,207 INFO L125 PetriNetUnfolderBase]: For 606/606 co-relation queries the response was YES. [2024-10-14 20:00:13,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35815 conditions, 18760 events. 11904/18760 cut-off events. For 606/606 co-relation queries the response was YES. Maximal size of possible extension queue 980. Compared 140939 event pairs, 8450 based on Foata normal form. 2/13666 useless extension candidates. Maximal degree in co-relation 35539. Up to 6246 conditions per place. [2024-10-14 20:00:13,301 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 134 selfloop transitions, 180 changer transitions 1/334 dead transitions. [2024-10-14 20:00:13,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 334 transitions, 2968 flow [2024-10-14 20:00:13,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-14 20:00:13,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-14 20:00:13,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1023 transitions. [2024-10-14 20:00:13,305 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4420916162489196 [2024-10-14 20:00:13,305 INFO L175 Difference]: Start difference. First operand has 128 places, 216 transitions, 1790 flow. Second operand 26 states and 1023 transitions. [2024-10-14 20:00:13,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 334 transitions, 2968 flow [2024-10-14 20:00:13,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 334 transitions, 2894 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 20:00:13,323 INFO L231 Difference]: Finished difference. Result has 154 places, 251 transitions, 2441 flow [2024-10-14 20:00:13,324 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1727, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2441, PETRI_PLACES=154, PETRI_TRANSITIONS=251} [2024-10-14 20:00:13,324 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 68 predicate places. [2024-10-14 20:00:13,324 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 251 transitions, 2441 flow [2024-10-14 20:00:13,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.0) internal successors, (408), 12 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:13,325 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:13,325 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2024-10-14 20:00:13,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-10-14 20:00:13,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:13,526 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-14 20:00:13,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:13,526 INFO L85 PathProgramCache]: Analyzing trace with hash -11636305, now seen corresponding path program 1 times [2024-10-14 20:00:13,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:13,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81572430] [2024-10-14 20:00:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:13,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:13,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:13,528 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:13,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-14 20:00:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:13,604 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-14 20:00:13,605 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:13,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 20:00:13,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-14 20:00:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:13,959 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 20:00:14,354 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:14,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81572430] [2024-10-14 20:00:14,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81572430] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:00:14,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:00:14,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-14 20:00:14,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523811359] [2024-10-14 20:00:14,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:00:14,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 20:00:14,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:14,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 20:00:14,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2024-10-14 20:00:15,560 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-10-14 20:00:15,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 251 transitions, 2441 flow. Second operand has 14 states, 14 states have (on average 38.642857142857146) internal successors, (541), 14 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:15,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:15,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-10-14 20:00:15,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:27,003 INFO L124 PetriNetUnfolderBase]: 16640/26189 cut-off events. [2024-10-14 20:00:27,003 INFO L125 PetriNetUnfolderBase]: For 761/761 co-relation queries the response was YES. [2024-10-14 20:00:27,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49874 conditions, 26189 events. 16640/26189 cut-off events. For 761/761 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 193194 event pairs, 11830 based on Foata normal form. 7/19034 useless extension candidates. Maximal degree in co-relation 42938. Up to 15615 conditions per place. [2024-10-14 20:00:27,138 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 93 selfloop transitions, 187 changer transitions 0/300 dead transitions. [2024-10-14 20:00:27,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 300 transitions, 3228 flow [2024-10-14 20:00:27,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-14 20:00:27,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-14 20:00:27,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1033 transitions. [2024-10-14 20:00:27,143 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5046409379579873 [2024-10-14 20:00:27,143 INFO L175 Difference]: Start difference. First operand has 154 places, 251 transitions, 2441 flow. Second operand 23 states and 1033 transitions. [2024-10-14 20:00:27,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 300 transitions, 3228 flow [2024-10-14 20:00:27,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 300 transitions, 3037 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-14 20:00:27,165 INFO L231 Difference]: Finished difference. Result has 174 places, 259 transitions, 2817 flow [2024-10-14 20:00:27,165 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2265, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2817, PETRI_PLACES=174, PETRI_TRANSITIONS=259} [2024-10-14 20:00:27,166 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 88 predicate places. [2024-10-14 20:00:27,166 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 259 transitions, 2817 flow [2024-10-14 20:00:27,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 38.642857142857146) internal successors, (541), 14 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:27,167 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:27,167 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:27,172 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 (11)] Forceful destruction successful, exit code 0 [2024-10-14 20:00:27,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:27,368 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-14 20:00:27,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:27,369 INFO L85 PathProgramCache]: Analyzing trace with hash -201301963, now seen corresponding path program 1 times [2024-10-14 20:00:27,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:27,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408712776] [2024-10-14 20:00:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 20:00:27,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:27,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:27,370 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:27,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-14 20:00:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 20:00:27,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 20:00:27,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 20:00:27,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 20:00:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 20:00:27,683 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:27,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408712776] [2024-10-14 20:00:27,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408712776] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 20:00:27,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 20:00:27,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-14 20:00:27,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841480342] [2024-10-14 20:00:27,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 20:00:27,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 20:00:27,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:27,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 20:00:27,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-10-14 20:00:27,954 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-10-14 20:00:27,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 259 transitions, 2817 flow. Second operand has 10 states, 10 states have (on average 39.2) internal successors, (392), 10 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:27,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:27,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-10-14 20:00:27,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 20:00:32,094 INFO L124 PetriNetUnfolderBase]: 20462/32566 cut-off events. [2024-10-14 20:00:32,095 INFO L125 PetriNetUnfolderBase]: For 1017/1017 co-relation queries the response was YES. [2024-10-14 20:00:32,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62072 conditions, 32566 events. 20462/32566 cut-off events. For 1017/1017 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 245591 event pairs, 13814 based on Foata normal form. 0/23325 useless extension candidates. Maximal degree in co-relation 59277. Up to 21087 conditions per place. [2024-10-14 20:00:32,382 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 198 selfloop transitions, 145 changer transitions 0/362 dead transitions. [2024-10-14 20:00:32,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 362 transitions, 3777 flow [2024-10-14 20:00:32,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 20:00:32,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 20:00:32,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 601 transitions. [2024-10-14 20:00:32,386 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5627340823970037 [2024-10-14 20:00:32,386 INFO L175 Difference]: Start difference. First operand has 174 places, 259 transitions, 2817 flow. Second operand 12 states and 601 transitions. [2024-10-14 20:00:32,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 362 transitions, 3777 flow [2024-10-14 20:00:32,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 362 transitions, 3419 flow, removed 3 selfloop flow, removed 18 redundant places. [2024-10-14 20:00:32,409 INFO L231 Difference]: Finished difference. Result has 170 places, 265 transitions, 2912 flow [2024-10-14 20:00:32,409 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2465, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2912, PETRI_PLACES=170, PETRI_TRANSITIONS=265} [2024-10-14 20:00:32,410 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 84 predicate places. [2024-10-14 20:00:32,410 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 265 transitions, 2912 flow [2024-10-14 20:00:32,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 39.2) internal successors, (392), 10 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:32,411 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 20:00:32,411 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 20:00:32,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-10-14 20:00:32,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:32,612 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-14 20:00:32,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 20:00:32,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1703188380, now seen corresponding path program 2 times [2024-10-14 20:00:32,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 20:00:32,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877544581] [2024-10-14 20:00:32,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 20:00:32,613 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 20:00:32,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 20:00:32,617 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 20:00:32,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-14 20:00:32,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 20:00:32,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 20:00:32,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 20:00:32,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 20:00:32,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 20:00:32,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 20:00:32,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 20:00:32,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 20:00:32,909 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 20:00:32,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-14 20:00:32,999 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-10-14 20:00:32,999 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 16 treesize of output 18 [2024-10-14 20:00:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-10-14 20:00:33,090 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 20:00:33,090 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 20:00:33,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877544581] [2024-10-14 20:00:33,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877544581] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 20:00:33,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 20:00:33,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 20:00:33,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936347197] [2024-10-14 20:00:33,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 20:00:33,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 20:00:33,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 20:00:33,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 20:00:33,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 20:00:33,324 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 89 [2024-10-14 20:00:33,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 265 transitions, 2912 flow. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 20:00:33,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 20:00:33,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 89 [2024-10-14 20:00:33,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand