./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i -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 16c93f411f7e7984964960171e6986ff89eb89f75783c8b2783bb47b46e751d9 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 07:44:22,953 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 07:44:23,018 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-04 07:44:23,021 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 07:44:23,022 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 07:44:23,047 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 07:44:23,047 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 07:44:23,047 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 07:44:23,048 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 07:44:23,048 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 07:44:23,048 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 07:44:23,048 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 07:44:23,048 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 07:44:23,048 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 07:44:23,048 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 07:44:23,048 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 07:44:23,048 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 07:44:23,048 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 07:44:23,049 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 07:44:23,049 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 07:44:23,049 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-04 07:44:23,049 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-04 07:44:23,049 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-04 07:44:23,049 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 07:44:23,049 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-04 07:44:23,049 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 07:44:23,049 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 07:44:23,049 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 07:44:23,049 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 07:44:23,050 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 07:44:23,050 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 07:44:23,050 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 07:44:23,050 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 07:44:23,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 07:44:23,050 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 07:44:23,050 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 07:44:23,050 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 07:44:23,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 07:44:23,050 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 07:44:23,050 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 07:44:23,051 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 07:44:23,051 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 07:44:23,051 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 16c93f411f7e7984964960171e6986ff89eb89f75783c8b2783bb47b46e751d9 [2025-03-04 07:44:23,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 07:44:23,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 07:44:23,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 07:44:23,280 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 07:44:23,280 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 07:44:23,281 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i [2025-03-04 07:44:24,415 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94b2af920/3d77188ecd774270aa24f4baba52ac40/FLAGd6195c719 [2025-03-04 07:44:24,659 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 07:44:24,660 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i [2025-03-04 07:44:24,671 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94b2af920/3d77188ecd774270aa24f4baba52ac40/FLAGd6195c719 [2025-03-04 07:44:24,680 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94b2af920/3d77188ecd774270aa24f4baba52ac40 [2025-03-04 07:44:24,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 07:44:24,683 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 07:44:24,685 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 07:44:24,685 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 07:44:24,688 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 07:44:24,688 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 07:44:24" (1/1) ... [2025-03-04 07:44:24,689 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33ff858a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 07:44:24, skipping insertion in model container [2025-03-04 07:44:24,689 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 07:44:24" (1/1) ... [2025-03-04 07:44:24,725 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 07:44:24,882 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 07:44:24,911 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 07:44:24,916 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 07:44:24,920 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 07:44:24,933 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) [2025-03-04 07:44:24,933 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5614e725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 07:44:24, skipping insertion in model container [2025-03-04 07:44:24,934 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 07:44:24,934 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-03-04 07:44:24,935 INFO L158 Benchmark]: Toolchain (without parser) took 251.93ms. Allocated memory is still 167.8MB. Free memory was 133.7MB in the beginning and 119.8MB in the end (delta: 13.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-04 07:44:24,935 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 226.5MB. Free memory is still 140.5MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-04 07:44:24,935 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.20ms. Allocated memory is still 167.8MB. Free memory was 133.7MB in the beginning and 119.8MB in the end (delta: 13.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-04 07:44:24,936 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 226.5MB. Free memory is still 140.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 249.20ms. Allocated memory is still 167.8MB. Free memory was 133.7MB in the beginning and 119.8MB in the end (delta: 13.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 607]: 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/21.0.5-tem/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_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i -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 16c93f411f7e7984964960171e6986ff89eb89f75783c8b2783bb47b46e751d9 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 07:44:26,513 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 07:44:26,600 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-03-04 07:44:26,605 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 07:44:26,607 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 07:44:26,625 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 07:44:26,626 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 07:44:26,627 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 07:44:26,627 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 07:44:26,627 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 07:44:26,628 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 07:44:26,628 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 07:44:26,628 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 07:44:26,628 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 07:44:26,628 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 07:44:26,628 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 07:44:26,628 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 07:44:26,628 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 07:44:26,628 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 07:44:26,628 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 07:44:26,628 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-04 07:44:26,628 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-04 07:44:26,629 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-04 07:44:26,629 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 07:44:26,629 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-04 07:44:26,629 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-04 07:44:26,629 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-04 07:44:26,629 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 07:44:26,629 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 07:44:26,629 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 07:44:26,629 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 07:44:26,629 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 07:44:26,629 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 07:44:26,629 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 07:44:26,629 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 07:44:26,629 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 07:44:26,629 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 07:44:26,629 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 07:44:26,629 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-04 07:44:26,629 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-04 07:44:26,629 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 07:44:26,630 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 07:44:26,631 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 07:44:26,631 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 07:44:26,631 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 16c93f411f7e7984964960171e6986ff89eb89f75783c8b2783bb47b46e751d9 [2025-03-04 07:44:26,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 07:44:26,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 07:44:26,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 07:44:26,873 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 07:44:26,873 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 07:44:26,874 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i [2025-03-04 07:44:28,033 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ff984bad/ebb6f18cb4e943b39b21de9fba3c9d2e/FLAG0a41c9f9b [2025-03-04 07:44:28,310 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 07:44:28,310 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/memleaks_test19-1.i [2025-03-04 07:44:28,325 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ff984bad/ebb6f18cb4e943b39b21de9fba3c9d2e/FLAG0a41c9f9b [2025-03-04 07:44:28,612 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ff984bad/ebb6f18cb4e943b39b21de9fba3c9d2e [2025-03-04 07:44:28,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 07:44:28,615 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 07:44:28,616 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 07:44:28,616 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 07:44:28,619 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 07:44:28,620 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 07:44:28" (1/1) ... [2025-03-04 07:44:28,621 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@363f45b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 07:44:28, skipping insertion in model container [2025-03-04 07:44:28,622 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 07:44:28" (1/1) ... [2025-03-04 07:44:28,646 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 07:44:28,833 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 07:44:28,861 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 07:44:28,863 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 07:44:28,867 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 07:44:28,888 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-03-04 07:44:28,898 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 07:44:28,939 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 07:44:28,961 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 07:44:28,963 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 07:44:28,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 07:44:28,976 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 07:44:29,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 07:44:29,070 INFO L204 MainTranslator]: Completed translation [2025-03-04 07:44:29,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 07:44:29 WrapperNode [2025-03-04 07:44:29,071 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 07:44:29,072 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 07:44:29,072 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 07:44:29,072 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 07:44:29,077 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 07:44:29" (1/1) ... [2025-03-04 07:44:29,091 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 07:44:29" (1/1) ... [2025-03-04 07:44:29,112 INFO L138 Inliner]: procedures = 171, calls = 87, calls flagged for inlining = 25, calls inlined = 7, statements flattened = 77 [2025-03-04 07:44:29,114 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 07:44:29,114 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 07:44:29,114 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 07:44:29,114 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 07:44:29,120 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 07:44:29" (1/1) ... [2025-03-04 07:44:29,121 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 07:44:29" (1/1) ... [2025-03-04 07:44:29,126 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 07:44:29" (1/1) ... [2025-03-04 07:44:29,148 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 7, 0]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 2, 0]. [2025-03-04 07:44:29,148 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 07:44:29" (1/1) ... [2025-03-04 07:44:29,148 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 07:44:29" (1/1) ... [2025-03-04 07:44:29,157 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 07:44:29" (1/1) ... [2025-03-04 07:44:29,158 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 07:44:29" (1/1) ... [2025-03-04 07:44:29,159 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 07:44:29" (1/1) ... [2025-03-04 07:44:29,160 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 07:44:29" (1/1) ... [2025-03-04 07:44:29,163 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 07:44:29,165 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 07:44:29,165 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 07:44:29,165 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 07:44:29,169 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 07:44:29" (1/1) ... [2025-03-04 07:44:29,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 07:44:29,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:44:29,194 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) [2025-03-04 07:44:29,199 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 [2025-03-04 07:44:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure f19_undo [2025-03-04 07:44:29,218 INFO L138 BoogieDeclarations]: Found implementation of procedure f19_undo [2025-03-04 07:44:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2025-03-04 07:44:29,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2025-03-04 07:44:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-04 07:44:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 07:44:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-04 07:44:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-04 07:44:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-04 07:44:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-03-04 07:44:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-04 07:44:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-04 07:44:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-03-04 07:44:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-04 07:44:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-04 07:44:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-04 07:44:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-03-04 07:44:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 07:44:29,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 07:44:29,317 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 07:44:29,319 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 07:44:29,376 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L527: havoc #t~malloc12.base, #t~malloc12.offset; [2025-03-04 07:44:29,502 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L771: havoc g19_#t~nondet45#1; [2025-03-04 07:44:29,515 INFO L? ?]: Removed 61 outVars from TransFormulas that were not future-live. [2025-03-04 07:44:29,516 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 07:44:29,523 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 07:44:29,525 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 07:44:29,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 07:44:29 BoogieIcfgContainer [2025-03-04 07:44:29,525 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 07:44:29,528 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 07:44:29,528 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 07:44:29,531 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 07:44:29,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 07:44:28" (1/3) ... [2025-03-04 07:44:29,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f5406ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 07:44:29, skipping insertion in model container [2025-03-04 07:44:29,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 07:44:29" (2/3) ... [2025-03-04 07:44:29,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f5406ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 07:44:29, skipping insertion in model container [2025-03-04 07:44:29,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 07:44:29" (3/3) ... [2025-03-04 07:44:29,535 INFO L128 eAbstractionObserver]: Analyzing ICFG memleaks_test19-1.i [2025-03-04 07:44:29,558 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 07:44:29,560 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG memleaks_test19-1.i that has 3 procedures, 70 locations, 1 initial locations, 0 loop locations, and 24 error locations. [2025-03-04 07:44:29,584 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 07:44:29,592 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;@696f53ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 07:44:29,593 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2025-03-04 07:44:29,595 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 64 states have internal predecessors, (69), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-04 07:44:29,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-04 07:44:29,599 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:44:29,600 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:44:29,600 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:44:29,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:44:29,604 INFO L85 PathProgramCache]: Analyzing trace with hash -2029880029, now seen corresponding path program 1 times [2025-03-04 07:44:29,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:44:29,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062378050] [2025-03-04 07:44:29,611 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:44:29,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:29,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:44:29,614 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:44:29,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 07:44:29,677 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-04 07:44:29,689 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-04 07:44:29,689 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:44:29,689 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:44:29,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-04 07:44:29,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:44:29,744 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 [2025-03-04 07:44:29,851 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-03-04 07:44:29,851 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 [2025-03-04 07:44:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:44:29,862 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:44:29,863 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:44:29,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062378050] [2025-03-04 07:44:29,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062378050] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:44:29,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:44:29,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 07:44:29,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938168657] [2025-03-04 07:44:29,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:44:29,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 07:44:29,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:44:29,887 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 07:44:29,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-04 07:44:29,890 INFO L87 Difference]: Start difference. First operand has 70 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 64 states have internal predecessors, (69), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-04 07:44:30,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:44:30,149 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2025-03-04 07:44:30,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 07:44:30,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2025-03-04 07:44:30,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:44:30,157 INFO L225 Difference]: With dead ends: 73 [2025-03-04 07:44:30,158 INFO L226 Difference]: Without dead ends: 71 [2025-03-04 07:44:30,159 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-04 07:44:30,162 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 32 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-04 07:44:30,163 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 160 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-04 07:44:30,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-03-04 07:44:30,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2025-03-04 07:44:30,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 60 states have internal predecessors, (67), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-04 07:44:30,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2025-03-04 07:44:30,189 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 8 [2025-03-04 07:44:30,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:44:30,189 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2025-03-04 07:44:30,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-04 07:44:30,189 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2025-03-04 07:44:30,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-04 07:44:30,190 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:44:30,190 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:44:30,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-04 07:44:30,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:30,391 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:44:30,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:44:30,391 INFO L85 PathProgramCache]: Analyzing trace with hash -2029880028, now seen corresponding path program 1 times [2025-03-04 07:44:30,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:44:30,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024042883] [2025-03-04 07:44:30,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:44:30,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:30,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:44:30,393 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:44:30,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-04 07:44:30,442 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-04 07:44:30,450 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-04 07:44:30,450 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:44:30,450 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:44:30,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-04 07:44:30,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:44:30,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 07:44:30,469 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 [2025-03-04 07:44:30,507 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2025-03-04 07:44:30,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-04 07:44:30,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-04 07:44:30,563 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-04 07:44:30,564 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 [2025-03-04 07:44:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:44:30,578 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:44:30,578 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:44:30,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024042883] [2025-03-04 07:44:30,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024042883] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:44:30,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:44:30,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-04 07:44:30,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824643131] [2025-03-04 07:44:30,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:44:30,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 07:44:30,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:44:30,580 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 07:44:30,580 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2025-03-04 07:44:30,580 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-04 07:44:30,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:44:30,741 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2025-03-04 07:44:30,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 07:44:30,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2025-03-04 07:44:30,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:44:30,742 INFO L225 Difference]: With dead ends: 85 [2025-03-04 07:44:30,742 INFO L226 Difference]: Without dead ends: 85 [2025-03-04 07:44:30,743 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2025-03-04 07:44:30,743 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 31 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 07:44:30,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 172 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 127 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2025-03-04 07:44:30,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-03-04 07:44:30,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2025-03-04 07:44:30,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.68) internal successors, (84), 69 states have internal predecessors, (84), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-04 07:44:30,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2025-03-04 07:44:30,748 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 8 [2025-03-04 07:44:30,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:44:30,748 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2025-03-04 07:44:30,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-04 07:44:30,748 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2025-03-04 07:44:30,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2025-03-04 07:44:30,749 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:44:30,749 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:44:30,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-04 07:44:30,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:30,950 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:44:30,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:44:30,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1694841578, now seen corresponding path program 1 times [2025-03-04 07:44:30,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:44:30,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940750867] [2025-03-04 07:44:30,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:44:30,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:30,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:44:30,954 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:44:30,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-04 07:44:30,996 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-04 07:44:31,006 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-04 07:44:31,006 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:44:31,006 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:44:31,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-04 07:44:31,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:44:31,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:44:31,032 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:44:31,032 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:44:31,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940750867] [2025-03-04 07:44:31,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940750867] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:44:31,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:44:31,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-04 07:44:31,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968498041] [2025-03-04 07:44:31,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:44:31,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 07:44:31,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:44:31,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 07:44:31,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-04 07:44:31,033 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-04 07:44:31,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:44:31,053 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2025-03-04 07:44:31,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 07:44:31,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2025-03-04 07:44:31,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:44:31,054 INFO L225 Difference]: With dead ends: 81 [2025-03-04 07:44:31,055 INFO L226 Difference]: Without dead ends: 81 [2025-03-04 07:44:31,055 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-04 07:44:31,055 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 10 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-04 07:44:31,055 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 246 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-04 07:44:31,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-04 07:44:31,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2025-03-04 07:44:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 72 states have internal predecessors, (87), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-04 07:44:31,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 99 transitions. [2025-03-04 07:44:31,060 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 99 transitions. Word has length 15 [2025-03-04 07:44:31,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:44:31,060 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 99 transitions. [2025-03-04 07:44:31,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-04 07:44:31,063 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 99 transitions. [2025-03-04 07:44:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-04 07:44:31,063 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:44:31,063 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:44:31,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-04 07:44:31,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:31,264 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:44:31,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:44:31,265 INFO L85 PathProgramCache]: Analyzing trace with hash 129817066, now seen corresponding path program 1 times [2025-03-04 07:44:31,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:44:31,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930211209] [2025-03-04 07:44:31,265 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:44:31,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:31,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:44:31,267 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:44:31,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-04 07:44:31,314 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-04 07:44:31,326 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 07:44:31,326 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:44:31,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:44:31,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-04 07:44:31,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:44:31,375 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#valid)| |ldv_malloc_#res.base| (select |c_#valid| |ldv_malloc_#res.base|)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2025-03-04 07:44:31,405 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-03-04 07:44:31,406 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 [2025-03-04 07:44:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:44:31,409 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:44:31,409 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:44:31,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930211209] [2025-03-04 07:44:31,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930211209] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:44:31,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:44:31,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-04 07:44:31,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926346715] [2025-03-04 07:44:31,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:44:31,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 07:44:31,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:44:31,410 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 07:44:31,411 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=14, Unknown=1, NotChecked=6, Total=30 [2025-03-04 07:44:31,411 INFO L87 Difference]: Start difference. First operand 81 states and 99 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:44:31,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:44:31,545 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2025-03-04 07:44:31,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-04 07:44:31,545 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2025-03-04 07:44:31,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:44:31,546 INFO L225 Difference]: With dead ends: 83 [2025-03-04 07:44:31,546 INFO L226 Difference]: Without dead ends: 83 [2025-03-04 07:44:31,546 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=20, Unknown=1, NotChecked=8, Total=42 [2025-03-04 07:44:31,546 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 29 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 07:44:31,546 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 192 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 108 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2025-03-04 07:44:31,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-04 07:44:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2025-03-04 07:44:31,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 53 states have (on average 1.5660377358490567) internal successors, (83), 70 states have internal predecessors, (83), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-04 07:44:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2025-03-04 07:44:31,550 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 17 [2025-03-04 07:44:31,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:44:31,551 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2025-03-04 07:44:31,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:44:31,551 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2025-03-04 07:44:31,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-04 07:44:31,551 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:44:31,551 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:44:31,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-04 07:44:31,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:31,753 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:44:31,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:44:31,753 INFO L85 PathProgramCache]: Analyzing trace with hash 129817067, now seen corresponding path program 1 times [2025-03-04 07:44:31,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:44:31,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826051193] [2025-03-04 07:44:31,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:44:31,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:31,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:44:31,755 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:44:31,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-04 07:44:31,803 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-04 07:44:31,815 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 07:44:31,815 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:44:31,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:44:31,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-04 07:44:31,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:44:31,893 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2025-03-04 07:44:31,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-04 07:44:31,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-04 07:44:31,926 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-04 07:44:31,927 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 [2025-03-04 07:44:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:44:31,938 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:44:31,938 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:44:31,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826051193] [2025-03-04 07:44:31,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826051193] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:44:31,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:44:31,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-04 07:44:31,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796290441] [2025-03-04 07:44:31,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:44:31,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-04 07:44:31,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:44:31,939 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-04 07:44:31,939 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=30, Unknown=1, NotChecked=10, Total=56 [2025-03-04 07:44:31,940 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:44:32,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:44:32,073 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2025-03-04 07:44:32,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-04 07:44:32,073 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2025-03-04 07:44:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:44:32,074 INFO L225 Difference]: With dead ends: 80 [2025-03-04 07:44:32,074 INFO L226 Difference]: Without dead ends: 80 [2025-03-04 07:44:32,074 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=38, Unknown=1, NotChecked=12, Total=72 [2025-03-04 07:44:32,075 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 43 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 07:44:32,075 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 189 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 101 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2025-03-04 07:44:32,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-04 07:44:32,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2025-03-04 07:44:32,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.490566037735849) internal successors, (79), 68 states have internal predecessors, (79), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-04 07:44:32,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2025-03-04 07:44:32,079 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 17 [2025-03-04 07:44:32,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:44:32,079 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2025-03-04 07:44:32,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:44:32,079 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2025-03-04 07:44:32,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-04 07:44:32,081 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:44:32,081 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:44:32,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-04 07:44:32,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:32,282 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:44:32,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:44:32,282 INFO L85 PathProgramCache]: Analyzing trace with hash 950172030, now seen corresponding path program 1 times [2025-03-04 07:44:32,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:44:32,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784636013] [2025-03-04 07:44:32,282 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:44:32,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:32,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:44:32,285 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:44:32,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-04 07:44:32,324 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-04 07:44:32,331 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 07:44:32,332 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:44:32,332 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:44:32,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-04 07:44:32,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:44:32,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-04 07:44:32,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 8 [2025-03-04 07:44:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:44:32,371 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:44:32,371 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:44:32,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784636013] [2025-03-04 07:44:32,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784636013] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:44:32,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:44:32,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-04 07:44:32,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033204639] [2025-03-04 07:44:32,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:44:32,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 07:44:32,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:44:32,372 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 07:44:32,372 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-04 07:44:32,372 INFO L87 Difference]: Start difference. First operand 77 states and 91 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-04 07:44:32,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:44:32,426 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2025-03-04 07:44:32,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 07:44:32,426 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2025-03-04 07:44:32,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:44:32,426 INFO L225 Difference]: With dead ends: 84 [2025-03-04 07:44:32,426 INFO L226 Difference]: Without dead ends: 84 [2025-03-04 07:44:32,427 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-04 07:44:32,429 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 2 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-04 07:44:32,430 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 298 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-04 07:44:32,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-03-04 07:44:32,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2025-03-04 07:44:32,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 57 states have (on average 1.456140350877193) internal successors, (83), 71 states have internal predecessors, (83), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2025-03-04 07:44:32,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2025-03-04 07:44:32,438 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 17 [2025-03-04 07:44:32,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:44:32,438 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2025-03-04 07:44:32,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-04 07:44:32,439 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2025-03-04 07:44:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-04 07:44:32,439 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:44:32,439 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:44:32,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-04 07:44:32,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:32,640 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:44:32,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:44:32,640 INFO L85 PathProgramCache]: Analyzing trace with hash 656769023, now seen corresponding path program 1 times [2025-03-04 07:44:32,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:44:32,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014756233] [2025-03-04 07:44:32,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:44:32,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:32,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:44:32,643 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:44:32,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-04 07:44:32,678 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-04 07:44:32,685 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 07:44:32,685 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:44:32,685 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:44:32,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-04 07:44:32,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:44:32,754 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~#a19~0#1.base_7| (_ BitVec 32))) (and (= (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~#a19~0#1.base_7| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~#a19~0#1.base_7|)))) is different from true [2025-03-04 07:44:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:44:32,760 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:44:32,760 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:44:32,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014756233] [2025-03-04 07:44:32,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014756233] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:44:32,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:44:32,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 07:44:32,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126778226] [2025-03-04 07:44:32,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:44:32,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 07:44:32,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:44:32,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 07:44:32,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2025-03-04 07:44:32,761 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-04 07:44:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:44:32,856 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2025-03-04 07:44:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 07:44:32,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2025-03-04 07:44:32,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:44:32,857 INFO L225 Difference]: With dead ends: 112 [2025-03-04 07:44:32,857 INFO L226 Difference]: Without dead ends: 106 [2025-03-04 07:44:32,857 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2025-03-04 07:44:32,857 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 36 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 07:44:32,857 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 185 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 84 Invalid, 0 Unknown, 112 Unchecked, 0.1s Time] [2025-03-04 07:44:32,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-03-04 07:44:32,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2025-03-04 07:44:32,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 64 states have (on average 1.4375) internal successors, (92), 78 states have internal predecessors, (92), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2025-03-04 07:44:32,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2025-03-04 07:44:32,865 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 17 [2025-03-04 07:44:32,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:44:32,865 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2025-03-04 07:44:32,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-04 07:44:32,865 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2025-03-04 07:44:32,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-04 07:44:32,866 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:44:32,866 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:44:32,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-04 07:44:33,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:33,067 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:44:33,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:44:33,067 INFO L85 PathProgramCache]: Analyzing trace with hash 331573621, now seen corresponding path program 1 times [2025-03-04 07:44:33,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:44:33,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421341106] [2025-03-04 07:44:33,067 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:44:33,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:33,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:44:33,069 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:44:33,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-04 07:44:33,112 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-04 07:44:33,124 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-04 07:44:33,124 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:44:33,124 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:44:33,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 07:44:33,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:44:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-04 07:44:33,144 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:44:33,144 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:44:33,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421341106] [2025-03-04 07:44:33,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421341106] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:44:33,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:44:33,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 07:44:33,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556103025] [2025-03-04 07:44:33,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:44:33,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 07:44:33,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:44:33,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 07:44:33,144 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 07:44:33,145 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 07:44:33,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:44:33,155 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2025-03-04 07:44:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 07:44:33,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2025-03-04 07:44:33,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:44:33,156 INFO L225 Difference]: With dead ends: 95 [2025-03-04 07:44:33,156 INFO L226 Difference]: Without dead ends: 95 [2025-03-04 07:44:33,157 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 07:44:33,157 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-04 07:44:33,157 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 184 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-04 07:44:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2025-03-04 07:44:33,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2025-03-04 07:44:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 70 states have (on average 1.4) internal successors, (98), 84 states have internal predecessors, (98), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2025-03-04 07:44:33,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2025-03-04 07:44:33,162 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 23 [2025-03-04 07:44:33,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:44:33,162 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2025-03-04 07:44:33,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 07:44:33,162 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2025-03-04 07:44:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-04 07:44:33,162 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:44:33,162 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:44:33,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-04 07:44:33,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:33,363 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:44:33,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:44:33,363 INFO L85 PathProgramCache]: Analyzing trace with hash 331633203, now seen corresponding path program 1 times [2025-03-04 07:44:33,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:44:33,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482779829] [2025-03-04 07:44:33,364 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:44:33,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:33,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:44:33,365 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:44:33,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-04 07:44:33,409 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-04 07:44:33,421 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-04 07:44:33,421 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:44:33,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:44:33,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-04 07:44:33,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:44:33,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-04 07:44:33,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 8 [2025-03-04 07:44:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 07:44:33,453 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:44:33,453 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:44:33,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482779829] [2025-03-04 07:44:33,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482779829] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:44:33,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:44:33,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-04 07:44:33,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037443429] [2025-03-04 07:44:33,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:44:33,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 07:44:33,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:44:33,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 07:44:33,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-04 07:44:33,454 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 07:44:33,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:44:33,491 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2025-03-04 07:44:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 07:44:33,491 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2025-03-04 07:44:33,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:44:33,491 INFO L225 Difference]: With dead ends: 92 [2025-03-04 07:44:33,492 INFO L226 Difference]: Without dead ends: 92 [2025-03-04 07:44:33,492 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-04 07:44:33,492 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 0 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-04 07:44:33,492 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 300 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-04 07:44:33,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-03-04 07:44:33,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2025-03-04 07:44:33,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 67 states have (on average 1.373134328358209) internal successors, (92), 81 states have internal predecessors, (92), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2025-03-04 07:44:33,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2025-03-04 07:44:33,495 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 23 [2025-03-04 07:44:33,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:44:33,496 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2025-03-04 07:44:33,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 07:44:33,496 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2025-03-04 07:44:33,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-04 07:44:33,496 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:44:33,496 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:44:33,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-04 07:44:33,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:33,701 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:44:33,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:44:33,701 INFO L85 PathProgramCache]: Analyzing trace with hash -106256679, now seen corresponding path program 1 times [2025-03-04 07:44:33,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:44:33,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897031825] [2025-03-04 07:44:33,701 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:44:33,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:33,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:44:33,703 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:44:33,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-04 07:44:33,745 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-04 07:44:33,757 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-04 07:44:33,757 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:44:33,757 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:44:33,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 07:44:33,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:44:33,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2025-03-04 07:44:33,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 25 treesize of output 13 [2025-03-04 07:44:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:44:33,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 07:44:33,934 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:44:33,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897031825] [2025-03-04 07:44:33,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897031825] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 07:44:33,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1656930336] [2025-03-04 07:44:33,934 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:44:33,934 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-04 07:44:33,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-04 07:44:33,936 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-04 07:44:33,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2025-03-04 07:44:33,999 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-04 07:44:34,044 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-04 07:44:34,044 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:44:34,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:44:34,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-04 07:44:34,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:44:34,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2025-03-04 07:44:34,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2025-03-04 07:44:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:44:34,208 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 07:44:34,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1656930336] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 07:44:34,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 07:44:34,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2025-03-04 07:44:34,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672031702] [2025-03-04 07:44:34,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 07:44:34,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-04 07:44:34,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:44:34,253 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-04 07:44:34,253 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-03-04 07:44:34,253 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-04 07:44:34,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:44:34,367 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2025-03-04 07:44:34,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 07:44:34,368 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2025-03-04 07:44:34,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:44:34,368 INFO L225 Difference]: With dead ends: 98 [2025-03-04 07:44:34,368 INFO L226 Difference]: Without dead ends: 98 [2025-03-04 07:44:34,369 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2025-03-04 07:44:34,369 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 90 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 07:44:34,369 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 318 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 07:44:34,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-04 07:44:34,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2025-03-04 07:44:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.352112676056338) internal successors, (96), 85 states have internal predecessors, (96), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2025-03-04 07:44:34,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 111 transitions. [2025-03-04 07:44:34,372 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 111 transitions. Word has length 24 [2025-03-04 07:44:34,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:44:34,373 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 111 transitions. [2025-03-04 07:44:34,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-04 07:44:34,373 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 111 transitions. [2025-03-04 07:44:34,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-04 07:44:34,373 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:44:34,373 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:44:34,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-04 07:44:34,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2025-03-04 07:44:34,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2025-03-04 07:44:34,774 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:44:34,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:44:34,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1001010255, now seen corresponding path program 1 times [2025-03-04 07:44:34,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:44:34,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463988650] [2025-03-04 07:44:34,775 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:44:34,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:34,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:44:34,777 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:44:34,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-04 07:44:34,828 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-04 07:44:34,844 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-04 07:44:34,844 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:44:34,844 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:44:34,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-04 07:44:34,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:44:34,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 1 [2025-03-04 07:44:34,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 25 treesize of output 13 [2025-03-04 07:44:34,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2025-03-04 07:44:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:44:34,980 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 07:44:35,046 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:44:35,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463988650] [2025-03-04 07:44:35,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463988650] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 07:44:35,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [442780938] [2025-03-04 07:44:35,046 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:44:35,046 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-04 07:44:35,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-04 07:44:35,048 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-04 07:44:35,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2025-03-04 07:44:35,103 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-04 07:44:35,146 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-04 07:44:35,147 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:44:35,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:44:35,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-04 07:44:35,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:44:35,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2025-03-04 07:44:35,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2025-03-04 07:44:35,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2025-03-04 07:44:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:44:35,355 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 07:44:35,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [442780938] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 07:44:35,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 07:44:35,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2025-03-04 07:44:35,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013492828] [2025-03-04 07:44:35,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 07:44:35,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-04 07:44:35,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:44:35,421 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-04 07:44:35,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-03-04 07:44:35,421 INFO L87 Difference]: Start difference. First operand 97 states and 111 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-04 07:44:39,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-04 07:44:43,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-04 07:44:47,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-04 07:44:52,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-04 07:44:56,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-04 07:44:56,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:44:56,978 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2025-03-04 07:44:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-04 07:44:56,979 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2025-03-04 07:44:56,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:44:56,980 INFO L225 Difference]: With dead ends: 154 [2025-03-04 07:44:56,980 INFO L226 Difference]: Without dead ends: 154 [2025-03-04 07:44:56,980 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2025-03-04 07:44:56,980 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 115 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 10 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2025-03-04 07:44:56,981 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 314 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 196 Invalid, 5 Unknown, 0 Unchecked, 21.4s Time] [2025-03-04 07:44:56,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2025-03-04 07:44:56,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 134. [2025-03-04 07:44:56,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 102 states have (on average 1.411764705882353) internal successors, (144), 117 states have internal predecessors, (144), 9 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) [2025-03-04 07:44:56,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 165 transitions. [2025-03-04 07:44:56,987 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 165 transitions. Word has length 25 [2025-03-04 07:44:56,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:44:56,987 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 165 transitions. [2025-03-04 07:44:56,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-04 07:44:56,987 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 165 transitions. [2025-03-04 07:44:56,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-04 07:44:56,987 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:44:56,987 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:44:56,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2025-03-04 07:44:57,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-04 07:44:57,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:57,388 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:44:57,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:44:57,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1212361168, now seen corresponding path program 1 times [2025-03-04 07:44:57,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:44:57,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755006165] [2025-03-04 07:44:57,389 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:44:57,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:57,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:44:57,391 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:44:57,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-04 07:44:57,436 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-04 07:44:57,447 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-04 07:44:57,447 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:44:57,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:44:57,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 07:44:57,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:44:57,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2025-03-04 07:44:57,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2025-03-04 07:44:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:44:57,850 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:44:57,850 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:44:57,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755006165] [2025-03-04 07:44:57,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755006165] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:44:57,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:44:57,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-04 07:44:57,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911561562] [2025-03-04 07:44:57,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:44:57,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 07:44:57,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:44:57,850 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 07:44:57,850 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-04 07:44:57,851 INFO L87 Difference]: Start difference. First operand 134 states and 165 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:44:58,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:44:58,124 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2025-03-04 07:44:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 07:44:58,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2025-03-04 07:44:58,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:44:58,126 INFO L225 Difference]: With dead ends: 83 [2025-03-04 07:44:58,126 INFO L226 Difference]: Without dead ends: 77 [2025-03-04 07:44:58,126 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-04 07:44:58,126 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 1 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-04 07:44:58,126 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 314 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-04 07:44:58,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-03-04 07:44:58,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2025-03-04 07:44:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 67 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-04 07:44:58,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2025-03-04 07:44:58,129 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 25 [2025-03-04 07:44:58,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:44:58,129 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2025-03-04 07:44:58,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:44:58,129 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2025-03-04 07:44:58,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-04 07:44:58,129 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:44:58,130 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:44:58,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-04 07:44:58,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:58,330 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting f19_undoErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:44:58,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:44:58,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1279899813, now seen corresponding path program 1 times [2025-03-04 07:44:58,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:44:58,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379607820] [2025-03-04 07:44:58,331 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:44:58,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:58,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:44:58,332 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:44:58,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-04 07:44:58,376 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-04 07:44:58,390 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-04 07:44:58,390 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:44:58,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:44:58,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-04 07:44:58,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:44:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-04 07:44:58,663 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:44:58,663 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:44:58,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379607820] [2025-03-04 07:44:58,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379607820] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:44:58,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:44:58,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-04 07:44:58,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836528081] [2025-03-04 07:44:58,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:44:58,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 07:44:58,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:44:58,664 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 07:44:58,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-04 07:44:58,664 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:44:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:44:59,331 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2025-03-04 07:44:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-04 07:44:59,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2025-03-04 07:44:59,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:44:59,333 INFO L225 Difference]: With dead ends: 87 [2025-03-04 07:44:59,333 INFO L226 Difference]: Without dead ends: 87 [2025-03-04 07:44:59,333 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-04 07:44:59,333 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 16 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-03-04 07:44:59,333 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 194 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-03-04 07:44:59,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-03-04 07:44:59,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2025-03-04 07:44:59,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 56 states have (on average 1.375) internal successors, (77), 68 states have internal predecessors, (77), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-04 07:44:59,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2025-03-04 07:44:59,335 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 27 [2025-03-04 07:44:59,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:44:59,338 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2025-03-04 07:44:59,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:44:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2025-03-04 07:44:59,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-04 07:44:59,339 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:44:59,339 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:44:59,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-04 07:44:59,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:59,539 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting f19_undoErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:44:59,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:44:59,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1279899814, now seen corresponding path program 1 times [2025-03-04 07:44:59,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:44:59,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930175126] [2025-03-04 07:44:59,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:44:59,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:44:59,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:44:59,543 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:44:59,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-04 07:44:59,590 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-04 07:44:59,602 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-04 07:44:59,602 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:44:59,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:44:59,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-04 07:44:59,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:45:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-04 07:45:00,136 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:45:00,136 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:45:00,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930175126] [2025-03-04 07:45:00,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930175126] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:45:00,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:45:00,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-04 07:45:00,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089107658] [2025-03-04 07:45:00,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:45:00,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-04 07:45:00,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:45:00,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-04 07:45:00,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-04 07:45:00,137 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:45:00,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:45:00,726 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2025-03-04 07:45:00,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-04 07:45:00,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2025-03-04 07:45:00,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:45:00,732 INFO L225 Difference]: With dead ends: 88 [2025-03-04 07:45:00,732 INFO L226 Difference]: Without dead ends: 88 [2025-03-04 07:45:00,732 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-03-04 07:45:00,732 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 18 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-04 07:45:00,732 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 256 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-04 07:45:00,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2025-03-04 07:45:00,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2025-03-04 07:45:00,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 60 states have (on average 1.3833333333333333) internal successors, (83), 73 states have internal predecessors, (83), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-04 07:45:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2025-03-04 07:45:00,734 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 27 [2025-03-04 07:45:00,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:45:00,735 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2025-03-04 07:45:00,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:45:00,735 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2025-03-04 07:45:00,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-03-04 07:45:00,735 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:45:00,735 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:45:00,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-04 07:45:00,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:00,936 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:45:00,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:45:00,936 INFO L85 PathProgramCache]: Analyzing trace with hash 966546839, now seen corresponding path program 1 times [2025-03-04 07:45:00,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:45:00,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47863414] [2025-03-04 07:45:00,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:45:00,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:00,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:45:00,939 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:45:00,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-04 07:45:00,986 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-04 07:45:00,997 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-04 07:45:00,998 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:45:00,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:45:00,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-04 07:45:01,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:45:01,014 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 [2025-03-04 07:45:01,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 1 [2025-03-04 07:45:01,279 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 5 [2025-03-04 07:45:01,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 29 treesize of output 17 [2025-03-04 07:45:01,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2025-03-04 07:45:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:45:01,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 07:45:05,870 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:45:05,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47863414] [2025-03-04 07:45:05,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47863414] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 07:45:05,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1970041669] [2025-03-04 07:45:05,870 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:45:05,870 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-04 07:45:05,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-04 07:45:05,872 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-04 07:45:05,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2025-03-04 07:45:05,931 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-04 07:45:05,971 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-04 07:45:05,971 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:45:05,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:45:05,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-04 07:45:05,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:45:06,065 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 [2025-03-04 07:45:06,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2025-03-04 07:45:06,483 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 11 treesize of output 5 [2025-03-04 07:45:06,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 15 [2025-03-04 07:45:06,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 11 [2025-03-04 07:45:06,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:45:06,719 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 07:45:07,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1970041669] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 07:45:07,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 07:45:07,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2025-03-04 07:45:07,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236236828] [2025-03-04 07:45:07,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 07:45:07,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-04 07:45:07,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:45:07,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-04 07:45:07,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=121, Unknown=1, NotChecked=0, Total=156 [2025-03-04 07:45:07,100 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 12 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-04 07:45:08,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:45:08,059 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2025-03-04 07:45:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-04 07:45:08,063 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2025-03-04 07:45:08,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:45:08,063 INFO L225 Difference]: With dead ends: 89 [2025-03-04 07:45:08,063 INFO L226 Difference]: Without dead ends: 89 [2025-03-04 07:45:08,064 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=34, Invalid=121, Unknown=1, NotChecked=0, Total=156 [2025-03-04 07:45:08,064 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 30 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-04 07:45:08,064 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 317 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-04 07:45:08,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2025-03-04 07:45:08,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2025-03-04 07:45:08,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 76 states have internal predecessors, (86), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-04 07:45:08,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2025-03-04 07:45:08,069 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 26 [2025-03-04 07:45:08,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:45:08,069 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2025-03-04 07:45:08,069 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2025-03-04 07:45:08,069 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2025-03-04 07:45:08,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-04 07:45:08,069 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:45:08,069 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:45:08,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2025-03-04 07:45:08,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-04 07:45:08,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:08,470 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:45:08,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:45:08,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1022188513, now seen corresponding path program 1 times [2025-03-04 07:45:08,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:45:08,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338563924] [2025-03-04 07:45:08,471 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:45:08,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:08,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:45:08,473 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:45:08,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-04 07:45:08,522 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-04 07:45:08,534 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 07:45:08,534 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:45:08,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:45:08,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-04 07:45:08,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:45:08,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2025-03-04 07:45:09,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 07:45:09,094 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:45:09,094 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:45:09,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338563924] [2025-03-04 07:45:09,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338563924] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:45:09,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:45:09,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-04 07:45:09,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877587602] [2025-03-04 07:45:09,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:45:09,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-04 07:45:09,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:45:09,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-04 07:45:09,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-03-04 07:45:09,096 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:45:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:45:09,711 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2025-03-04 07:45:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 07:45:09,711 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2025-03-04 07:45:09,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:45:09,712 INFO L225 Difference]: With dead ends: 90 [2025-03-04 07:45:09,712 INFO L226 Difference]: Without dead ends: 90 [2025-03-04 07:45:09,712 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-03-04 07:45:09,712 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 13 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-04 07:45:09,712 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 345 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-04 07:45:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2025-03-04 07:45:09,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2025-03-04 07:45:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 76 states have internal predecessors, (85), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-04 07:45:09,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2025-03-04 07:45:09,714 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 28 [2025-03-04 07:45:09,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:45:09,714 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2025-03-04 07:45:09,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:45:09,715 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2025-03-04 07:45:09,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-04 07:45:09,716 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:45:09,716 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:45:09,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-03-04 07:45:09,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:09,920 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:45:09,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:45:09,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1279902439, now seen corresponding path program 1 times [2025-03-04 07:45:09,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:45:09,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133765276] [2025-03-04 07:45:09,921 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:45:09,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:09,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:45:09,923 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:45:09,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-04 07:45:09,974 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-04 07:45:09,984 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-04 07:45:09,984 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:45:09,984 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:45:09,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-04 07:45:09,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:45:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-04 07:45:10,265 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:45:10,265 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:45:10,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133765276] [2025-03-04 07:45:10,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133765276] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:45:10,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:45:10,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-04 07:45:10,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186591934] [2025-03-04 07:45:10,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:45:10,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 07:45:10,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:45:10,266 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 07:45:10,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-04 07:45:10,266 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:45:10,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:45:10,956 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2025-03-04 07:45:10,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-04 07:45:10,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2025-03-04 07:45:10,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:45:10,957 INFO L225 Difference]: With dead ends: 98 [2025-03-04 07:45:10,957 INFO L226 Difference]: Without dead ends: 98 [2025-03-04 07:45:10,957 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2025-03-04 07:45:10,958 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 44 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2025-03-04 07:45:10,958 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 173 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2025-03-04 07:45:10,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-04 07:45:10,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2025-03-04 07:45:10,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 79 states have internal predecessors, (90), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-04 07:45:10,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2025-03-04 07:45:10,960 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 27 [2025-03-04 07:45:10,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:45:10,960 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2025-03-04 07:45:10,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:45:10,960 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2025-03-04 07:45:10,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-03-04 07:45:10,961 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:45:10,961 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:45:10,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-03-04 07:45:11,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:11,162 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:45:11,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:45:11,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1279902440, now seen corresponding path program 1 times [2025-03-04 07:45:11,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:45:11,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449337522] [2025-03-04 07:45:11,162 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:45:11,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:11,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:45:11,165 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:45:11,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-04 07:45:11,215 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-04 07:45:11,229 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-04 07:45:11,230 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:45:11,230 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:45:11,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-04 07:45:11,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:45:11,709 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2025-03-04 07:45:11,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-04 07:45:11,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-04 07:45:11,814 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-04 07:45:11,814 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 [2025-03-04 07:45:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:45:12,130 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:45:12,130 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:45:12,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449337522] [2025-03-04 07:45:12,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449337522] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:45:12,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:45:12,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-04 07:45:12,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360064612] [2025-03-04 07:45:12,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:45:12,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-04 07:45:12,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:45:12,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-04 07:45:12,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=41, Unknown=1, NotChecked=12, Total=72 [2025-03-04 07:45:12,131 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:45:13,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:45:13,415 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2025-03-04 07:45:13,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 07:45:13,416 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2025-03-04 07:45:13,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:45:13,416 INFO L225 Difference]: With dead ends: 97 [2025-03-04 07:45:13,416 INFO L226 Difference]: Without dead ends: 97 [2025-03-04 07:45:13,416 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=64, Unknown=1, NotChecked=16, Total=110 [2025-03-04 07:45:13,417 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 63 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-04 07:45:13,417 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 192 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 222 Invalid, 0 Unknown, 104 Unchecked, 1.1s Time] [2025-03-04 07:45:13,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2025-03-04 07:45:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2025-03-04 07:45:13,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 78 states have internal predecessors, (88), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-04 07:45:13,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2025-03-04 07:45:13,419 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 27 [2025-03-04 07:45:13,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:45:13,419 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2025-03-04 07:45:13,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:45:13,419 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2025-03-04 07:45:13,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-04 07:45:13,419 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:45:13,419 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:45:13,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2025-03-04 07:45:13,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:13,624 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:45:13,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:45:13,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1623072803, now seen corresponding path program 1 times [2025-03-04 07:45:13,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:45:13,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826094156] [2025-03-04 07:45:13,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:45:13,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:13,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:45:13,626 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:45:13,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-04 07:45:13,674 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-04 07:45:13,690 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-04 07:45:13,691 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:45:13,691 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:45:13,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-04 07:45:13,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:45:13,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2025-03-04 07:45:14,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2025-03-04 07:45:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 07:45:14,298 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:45:14,298 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:45:14,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826094156] [2025-03-04 07:45:14,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826094156] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:45:14,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:45:14,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-04 07:45:14,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783719091] [2025-03-04 07:45:14,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:45:14,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-04 07:45:14,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:45:14,300 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-04 07:45:14,300 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-03-04 07:45:14,300 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:45:15,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:45:15,482 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2025-03-04 07:45:15,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 07:45:15,483 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2025-03-04 07:45:15,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:45:15,484 INFO L225 Difference]: With dead ends: 98 [2025-03-04 07:45:15,484 INFO L226 Difference]: Without dead ends: 98 [2025-03-04 07:45:15,484 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-03-04 07:45:15,484 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-03-04 07:45:15,484 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 331 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-03-04 07:45:15,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-04 07:45:15,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2025-03-04 07:45:15,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 84 states have internal predecessors, (95), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-04 07:45:15,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2025-03-04 07:45:15,487 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 29 [2025-03-04 07:45:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:45:15,487 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2025-03-04 07:45:15,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:45:15,487 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2025-03-04 07:45:15,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-04 07:45:15,487 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:45:15,488 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:45:15,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-04 07:45:15,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:15,688 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:45:15,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:45:15,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1022269941, now seen corresponding path program 1 times [2025-03-04 07:45:15,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:45:15,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111509651] [2025-03-04 07:45:15,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:45:15,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:15,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:45:15,691 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:45:15,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-04 07:45:15,741 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-04 07:45:15,753 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 07:45:15,754 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:45:15,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:45:15,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 07:45:15,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:45:16,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2025-03-04 07:45:16,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2025-03-04 07:45:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:45:17,027 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 07:45:21,512 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:45:21,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111509651] [2025-03-04 07:45:21,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111509651] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 07:45:21,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [728927647] [2025-03-04 07:45:21,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:45:21,513 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-04 07:45:21,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-04 07:45:21,515 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-04 07:45:21,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2025-03-04 07:45:21,596 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-04 07:45:21,651 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-04 07:45:21,652 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:45:21,652 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:45:21,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-04 07:45:21,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:45:21,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2025-03-04 07:45:22,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2025-03-04 07:45:22,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:45:22,358 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 07:45:26,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [728927647] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 07:45:26,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 07:45:26,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2025-03-04 07:45:26,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027955941] [2025-03-04 07:45:26,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 07:45:26,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-04 07:45:26,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:45:26,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-04 07:45:26,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=142, Unknown=1, NotChecked=0, Total=182 [2025-03-04 07:45:26,699 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:45:27,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:45:27,834 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2025-03-04 07:45:27,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-04 07:45:27,835 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2025-03-04 07:45:27,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:45:27,835 INFO L225 Difference]: With dead ends: 96 [2025-03-04 07:45:27,835 INFO L226 Difference]: Without dead ends: 96 [2025-03-04 07:45:27,836 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=58, Invalid=213, Unknown=1, NotChecked=0, Total=272 [2025-03-04 07:45:27,836 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 54 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-04 07:45:27,836 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 347 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-04 07:45:27,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-03-04 07:45:27,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2025-03-04 07:45:27,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 83 states have internal predecessors, (94), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-04 07:45:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2025-03-04 07:45:27,839 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 28 [2025-03-04 07:45:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:45:27,839 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2025-03-04 07:45:27,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:45:27,839 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2025-03-04 07:45:27,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-04 07:45:27,839 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:45:27,839 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:45:27,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2025-03-04 07:45:28,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-04 07:45:28,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:28,240 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:45:28,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:45:28,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1112538626, now seen corresponding path program 1 times [2025-03-04 07:45:28,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:45:28,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723704728] [2025-03-04 07:45:28,240 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:45:28,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:28,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:45:28,242 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:45:28,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-04 07:45:28,296 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-04 07:45:28,307 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-04 07:45:28,307 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:45:28,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:45:28,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-04 07:45:28,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:45:28,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2025-03-04 07:45:28,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2025-03-04 07:45:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 07:45:28,638 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:45:28,638 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:45:28,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723704728] [2025-03-04 07:45:28,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723704728] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:45:28,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:45:28,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-04 07:45:28,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128186903] [2025-03-04 07:45:28,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:45:28,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 07:45:28,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:45:28,639 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 07:45:28,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-04 07:45:28,639 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 07:45:28,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:45:28,836 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2025-03-04 07:45:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 07:45:28,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2025-03-04 07:45:28,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:45:28,837 INFO L225 Difference]: With dead ends: 93 [2025-03-04 07:45:28,837 INFO L226 Difference]: Without dead ends: 93 [2025-03-04 07:45:28,838 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-04 07:45:28,838 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 0 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-04 07:45:28,838 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 297 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-04 07:45:28,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-03-04 07:45:28,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2025-03-04 07:45:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 70 states have (on average 1.3) internal successors, (91), 81 states have internal predecessors, (91), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2025-03-04 07:45:28,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2025-03-04 07:45:28,840 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 29 [2025-03-04 07:45:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:45:28,840 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2025-03-04 07:45:28,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 07:45:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2025-03-04 07:45:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-04 07:45:28,840 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:45:28,840 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:45:28,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-04 07:45:29,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:29,041 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:45:29,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:45:29,041 INFO L85 PathProgramCache]: Analyzing trace with hash 719511616, now seen corresponding path program 1 times [2025-03-04 07:45:29,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:45:29,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269077673] [2025-03-04 07:45:29,041 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:45:29,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:29,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:45:29,043 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:45:29,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-04 07:45:29,094 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-04 07:45:29,105 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-04 07:45:29,105 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:45:29,105 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:45:29,105 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 07:45:29,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:45:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-04 07:45:29,161 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:45:29,161 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:45:29,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269077673] [2025-03-04 07:45:29,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269077673] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:45:29,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:45:29,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 07:45:29,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117989521] [2025-03-04 07:45:29,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:45:29,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 07:45:29,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:45:29,161 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 07:45:29,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 07:45:29,162 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 07:45:29,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:45:29,254 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2025-03-04 07:45:29,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 07:45:29,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2025-03-04 07:45:29,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:45:29,255 INFO L225 Difference]: With dead ends: 83 [2025-03-04 07:45:29,255 INFO L226 Difference]: Without dead ends: 83 [2025-03-04 07:45:29,255 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-04 07:45:29,256 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 14 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 07:45:29,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 160 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 07:45:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-03-04 07:45:29,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2025-03-04 07:45:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 72 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-04 07:45:29,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2025-03-04 07:45:29,258 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 29 [2025-03-04 07:45:29,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:45:29,258 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2025-03-04 07:45:29,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 07:45:29,258 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2025-03-04 07:45:29,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-04 07:45:29,259 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:45:29,259 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:45:29,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-04 07:45:29,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:29,459 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:45:29,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:45:29,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1224350689, now seen corresponding path program 1 times [2025-03-04 07:45:29,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:45:29,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840723626] [2025-03-04 07:45:29,460 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:45:29,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:29,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:45:29,462 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:45:29,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-04 07:45:29,513 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-04 07:45:29,523 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-04 07:45:29,523 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:45:29,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:45:29,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-04 07:45:29,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:45:29,575 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 [2025-03-04 07:45:29,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2025-03-04 07:45:29,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 11 [2025-03-04 07:45:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 07:45:30,108 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:45:30,108 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:45:30,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840723626] [2025-03-04 07:45:30,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840723626] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:45:30,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:45:30,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-04 07:45:30,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417146695] [2025-03-04 07:45:30,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:45:30,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-04 07:45:30,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:45:30,109 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-04 07:45:30,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2025-03-04 07:45:30,109 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:45:31,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:45:31,202 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2025-03-04 07:45:31,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 07:45:31,203 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2025-03-04 07:45:31,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:45:31,203 INFO L225 Difference]: With dead ends: 82 [2025-03-04 07:45:31,203 INFO L226 Difference]: Without dead ends: 82 [2025-03-04 07:45:31,203 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2025-03-04 07:45:31,203 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 9 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-04 07:45:31,204 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 266 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-04 07:45:31,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-04 07:45:31,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2025-03-04 07:45:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 72 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-04 07:45:31,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2025-03-04 07:45:31,205 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 30 [2025-03-04 07:45:31,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:45:31,205 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2025-03-04 07:45:31,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:45:31,205 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2025-03-04 07:45:31,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-04 07:45:31,205 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:45:31,205 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:45:31,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-04 07:45:31,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:31,406 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:45:31,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:45:31,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1625617979, now seen corresponding path program 1 times [2025-03-04 07:45:31,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:45:31,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434954762] [2025-03-04 07:45:31,407 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:45:31,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:31,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:45:31,409 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:45:31,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-04 07:45:31,464 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-04 07:45:31,473 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-04 07:45:31,473 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:45:31,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:45:31,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 07:45:31,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:45:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-04 07:45:31,546 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:45:31,546 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:45:31,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434954762] [2025-03-04 07:45:31,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434954762] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:45:31,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:45:31,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 07:45:31,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990421040] [2025-03-04 07:45:31,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:45:31,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 07:45:31,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:45:31,547 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 07:45:31,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 07:45:31,547 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 07:45:31,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:45:31,611 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2025-03-04 07:45:31,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 07:45:31,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2025-03-04 07:45:31,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:45:31,612 INFO L225 Difference]: With dead ends: 82 [2025-03-04 07:45:31,612 INFO L226 Difference]: Without dead ends: 82 [2025-03-04 07:45:31,612 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 07:45:31,612 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 07:45:31,612 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 174 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 07:45:31,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-04 07:45:31,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2025-03-04 07:45:31,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 72 states have internal predecessors, (75), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-04 07:45:31,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2025-03-04 07:45:31,614 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 29 [2025-03-04 07:45:31,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:45:31,614 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2025-03-04 07:45:31,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 07:45:31,614 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2025-03-04 07:45:31,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-04 07:45:31,614 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:45:31,614 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:45:31,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-03-04 07:45:31,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:31,815 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:45:31,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:45:31,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1625597093, now seen corresponding path program 1 times [2025-03-04 07:45:31,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:45:31,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541259422] [2025-03-04 07:45:31,815 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:45:31,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:31,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:45:31,817 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:45:31,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-04 07:45:31,871 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-04 07:45:31,889 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-04 07:45:31,889 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:45:31,889 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:45:31,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-04 07:45:31,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:45:32,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2025-03-04 07:45:32,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2025-03-04 07:45:33,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2025-03-04 07:45:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:45:33,266 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 07:45:37,836 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:45:37,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541259422] [2025-03-04 07:45:37,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541259422] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 07:45:37,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2091714830] [2025-03-04 07:45:37,836 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:45:37,836 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-04 07:45:37,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-04 07:45:37,838 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-04 07:45:37,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2025-03-04 07:45:37,914 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-04 07:45:37,963 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-04 07:45:37,963 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:45:37,963 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:45:37,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-04 07:45:37,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:45:38,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2025-03-04 07:45:38,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2025-03-04 07:45:38,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2025-03-04 07:45:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:45:38,704 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 07:45:43,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2091714830] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 07:45:43,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 07:45:43,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2025-03-04 07:45:43,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694515941] [2025-03-04 07:45:43,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 07:45:43,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-04 07:45:43,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:45:43,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-04 07:45:43,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=142, Unknown=1, NotChecked=0, Total=182 [2025-03-04 07:45:43,131 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:45:47,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2025-03-04 07:45:48,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:45:48,425 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2025-03-04 07:45:48,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-04 07:45:48,426 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2025-03-04 07:45:48,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:45:48,426 INFO L225 Difference]: With dead ends: 82 [2025-03-04 07:45:48,426 INFO L226 Difference]: Without dead ends: 82 [2025-03-04 07:45:48,426 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=58, Invalid=213, Unknown=1, NotChecked=0, Total=272 [2025-03-04 07:45:48,426 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2025-03-04 07:45:48,427 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 222 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 181 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2025-03-04 07:45:48,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-04 07:45:48,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2025-03-04 07:45:48,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 71 states have internal predecessors, (74), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-04 07:45:48,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2025-03-04 07:45:48,428 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 29 [2025-03-04 07:45:48,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:45:48,428 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2025-03-04 07:45:48,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 07:45:48,428 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2025-03-04 07:45:48,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-04 07:45:48,430 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:45:48,431 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:45:48,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2025-03-04 07:45:48,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-03-04 07:45:48,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:48,831 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:45:48,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:45:48,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1146097677, now seen corresponding path program 1 times [2025-03-04 07:45:48,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:45:48,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234195684] [2025-03-04 07:45:48,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:45:48,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:45:48,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:45:48,834 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:45:48,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-03-04 07:45:48,891 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-04 07:45:48,903 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-04 07:45:48,903 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:45:48,903 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:45:48,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-03-04 07:45:48,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:45:48,980 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 [2025-03-04 07:45:49,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2025-03-04 07:45:49,458 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 11 treesize of output 5 [2025-03-04 07:45:49,732 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2025-03-04 07:45:49,732 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 25 treesize of output 28 [2025-03-04 07:45:49,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 15 [2025-03-04 07:45:50,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 11 [2025-03-04 07:45:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 07:45:50,233 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 07:45:55,382 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:45:55,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234195684] [2025-03-04 07:45:55,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234195684] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 07:45:55,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [733279769] [2025-03-04 07:45:55,382 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:45:55,382 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-04 07:45:55,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-04 07:45:55,384 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-04 07:45:55,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2025-03-04 07:45:55,471 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-04 07:45:55,524 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-04 07:45:55,524 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:45:55,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:45:55,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-04 07:45:55,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:45:55,586 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 [2025-03-04 07:45:55,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2025-03-04 07:45:55,837 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 11 treesize of output 5 [2025-03-04 07:45:55,870 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)))) is different from true [2025-03-04 07:45:55,959 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2025-03-04 07:45:55,960 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 18 treesize of output 24 [2025-03-04 07:45:56,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 15 [2025-03-04 07:45:56,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 11 [2025-03-04 07:45:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2025-03-04 07:45:56,264 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 07:46:04,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [733279769] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 07:46:04,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 07:46:04,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2025-03-04 07:46:04,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335304020] [2025-03-04 07:46:04,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 07:46:04,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-04 07:46:04,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:46:04,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-04 07:46:04,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=174, Unknown=2, NotChecked=26, Total=240 [2025-03-04 07:46:04,906 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-04 07:46:06,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:46:06,715 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2025-03-04 07:46:06,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-04 07:46:06,715 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2025-03-04 07:46:06,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:46:06,716 INFO L225 Difference]: With dead ends: 84 [2025-03-04 07:46:06,716 INFO L226 Difference]: Without dead ends: 84 [2025-03-04 07:46:06,716 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=59, Invalid=284, Unknown=3, NotChecked=34, Total=380 [2025-03-04 07:46:06,716 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 29 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-04 07:46:06,716 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 297 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 272 Invalid, 0 Unknown, 71 Unchecked, 1.4s Time] [2025-03-04 07:46:06,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2025-03-04 07:46:06,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2025-03-04 07:46:06,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 64 states have (on average 1.203125) internal successors, (77), 74 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-04 07:46:06,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2025-03-04 07:46:06,718 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 30 [2025-03-04 07:46:06,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:46:06,718 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2025-03-04 07:46:06,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-04 07:46:06,718 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2025-03-04 07:46:06,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-04 07:46:06,718 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:46:06,718 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:46:06,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-03-04 07:46:06,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2025-03-04 07:46:07,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2025-03-04 07:46:07,119 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:46:07,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:46:07,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1044642990, now seen corresponding path program 1 times [2025-03-04 07:46:07,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:46:07,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712649055] [2025-03-04 07:46:07,120 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:46:07,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:46:07,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:46:07,121 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:46:07,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-03-04 07:46:07,182 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-04 07:46:07,192 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-04 07:46:07,192 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:46:07,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:46:07,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-04 07:46:07,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:46:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-04 07:46:07,409 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 07:46:07,409 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 07:46:07,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712649055] [2025-03-04 07:46:07,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712649055] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 07:46:07,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 07:46:07,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-04 07:46:07,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016044689] [2025-03-04 07:46:07,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 07:46:07,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 07:46:07,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 07:46:07,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 07:46:07,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-04 07:46:07,410 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 07:46:07,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 07:46:07,622 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2025-03-04 07:46:07,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 07:46:07,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2025-03-04 07:46:07,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 07:46:07,623 INFO L225 Difference]: With dead ends: 87 [2025-03-04 07:46:07,623 INFO L226 Difference]: Without dead ends: 87 [2025-03-04 07:46:07,623 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-04 07:46:07,624 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 9 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-04 07:46:07,624 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 263 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-04 07:46:07,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2025-03-04 07:46:07,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2025-03-04 07:46:07,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 77 states have internal predecessors, (80), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2025-03-04 07:46:07,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2025-03-04 07:46:07,625 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 30 [2025-03-04 07:46:07,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 07:46:07,625 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2025-03-04 07:46:07,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 07:46:07,626 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2025-03-04 07:46:07,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-04 07:46:07,626 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 07:46:07,626 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 07:46:07,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-03-04 07:46:07,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:46:07,828 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr1ASSERT_VIOLATIONMEMORY_FREE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2025-03-04 07:46:07,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 07:46:07,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1769115591, now seen corresponding path program 1 times [2025-03-04 07:46:07,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 07:46:07,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971616237] [2025-03-04 07:46:07,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 07:46:07,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 07:46:07,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 07:46:07,830 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 07:46:07,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-03-04 07:46:07,888 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-04 07:46:07,900 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-04 07:46:07,900 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 07:46:07,900 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 07:46:07,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-04 07:46:07,902 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 07:46:08,188 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-04 07:46:08,189 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 [2025-03-04 07:46:08,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-03-04 07:46:08,523 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 7 treesize of output 5