./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8fc3dc66 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/goblint-regression/28-race_reach_90-arrayloop2_racing.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 f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:20:56,784 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:20:56,838 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:20:56,844 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:20:56,846 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:20:56,869 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:20:56,870 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:20:56,870 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:20:56,870 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:20:56,871 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:20:56,871 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:20:56,871 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:20:56,871 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:20:56,872 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:20:56,872 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:20:56,872 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:20:56,872 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:20:56,872 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:20:56,872 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:20:56,872 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:20:56,872 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:20:56,872 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:20:56,872 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:20:56,872 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:20:56,872 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:20:56,872 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:20:56,872 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:20:56,872 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:20:56,872 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:20:56,872 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:20:56,872 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:20:56,872 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:20:56,873 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:20:56,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:20:56,873 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:20:56,873 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:20:56,873 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:20:56,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:20:56,873 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:20:56,873 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:20:56,873 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:20:56,873 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:20:56,873 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 -> f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af [2025-03-17 14:20:57,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:20:57,087 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:20:57,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:20:57,089 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:20:57,090 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:20:57,090 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2025-03-17 14:20:58,239 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a119d40d6/f4d488ea66b8455c8c3ed1a938ccddab/FLAG7ea177921 [2025-03-17 14:20:58,590 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:20:58,591 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2025-03-17 14:20:58,610 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a119d40d6/f4d488ea66b8455c8c3ed1a938ccddab/FLAG7ea177921 [2025-03-17 14:20:58,628 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a119d40d6/f4d488ea66b8455c8c3ed1a938ccddab [2025-03-17 14:20:58,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:20:58,632 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:20:58,633 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:20:58,633 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:20:58,637 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:20:58,638 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:20:58" (1/1) ... [2025-03-17 14:20:58,638 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eee25a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:20:58, skipping insertion in model container [2025-03-17 14:20:58,638 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:20:58" (1/1) ... [2025-03-17 14:20:58,675 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:20:58,975 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-17 14:20:58,975 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-17 14:20:58,975 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-17 14:20:58,976 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-17 14:20:59,004 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:20:59,029 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) [2025-03-17 14:20:59,030 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@41cc8de7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:20:59, skipping insertion in model container [2025-03-17 14:20:59,030 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:20:59,030 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-03-17 14:20:59,035 INFO L158 Benchmark]: Toolchain (without parser) took 400.32ms. Allocated memory is still 167.8MB. Free memory was 122.8MB in the beginning and 105.2MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-17 14:20:59,035 INFO L158 Benchmark]: CDTParser took 0.48ms. Allocated memory is still 201.3MB. Free memory is still 117.1MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-17 14:20:59,035 INFO L158 Benchmark]: CACSL2BoogieTranslator took 397.48ms. Allocated memory is still 167.8MB. Free memory was 122.8MB in the beginning and 105.9MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-03-17 14:20:59,038 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48ms. Allocated memory is still 201.3MB. Free memory is still 117.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 397.48ms. Allocated memory is still 167.8MB. Free memory was 122.8MB in the beginning and 105.9MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1044]: 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/goblint-regression/28-race_reach_90-arrayloop2_racing.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 f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:21:00,681 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:21:00,793 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-03-17 14:21:00,798 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:21:00,799 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:21:00,816 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:21:00,817 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:21:00,817 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:21:00,817 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:21:00,818 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:21:00,818 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:21:00,818 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:21:00,818 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:21:00,818 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:21:00,818 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:21:00,818 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:21:00,818 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:21:00,818 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:21:00,818 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:21:00,818 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:21:00,818 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:21:00,818 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:21:00,818 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:21:00,818 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:21:00,819 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:21:00,819 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-17 14:21:00,819 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-17 14:21:00,819 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:21:00,819 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:21:00,819 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:21:00,819 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:21:00,819 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:21:00,819 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:21:00,819 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:21:00,819 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:21:00,819 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:21:00,819 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:21:00,819 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:21:00,819 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-17 14:21:00,819 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-17 14:21:00,819 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:21:00,819 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:21:00,819 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:21:00,820 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:21:00,820 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 -> f41f3c018db74ffccd5759d166eb9816a1bf73b1747e3e539ecb5bf51feb56af [2025-03-17 14:21:01,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:21:01,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:21:01,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:21:01,062 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:21:01,063 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:21:01,063 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2025-03-17 14:21:02,247 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb9daa2a8/5cfc73d3739e40a5abf8b8d326196744/FLAG05a9e6e7a [2025-03-17 14:21:02,483 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:21:02,484 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_90-arrayloop2_racing.i [2025-03-17 14:21:02,499 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb9daa2a8/5cfc73d3739e40a5abf8b8d326196744/FLAG05a9e6e7a [2025-03-17 14:21:02,811 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb9daa2a8/5cfc73d3739e40a5abf8b8d326196744 [2025-03-17 14:21:02,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:21:02,814 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:21:02,815 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:21:02,815 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:21:02,818 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:21:02,818 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:21:02" (1/1) ... [2025-03-17 14:21:02,820 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@555508e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:02, skipping insertion in model container [2025-03-17 14:21:02,820 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:21:02" (1/1) ... [2025-03-17 14:21:02,844 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:21:03,089 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-17 14:21:03,090 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-17 14:21:03,090 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-17 14:21:03,090 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-17 14:21:03,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:21:03,155 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-03-17 14:21:03,167 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:21:03,203 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-17 14:21:03,203 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-17 14:21:03,204 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-17 14:21:03,204 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-17 14:21:03,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:21:03,235 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:21:03,270 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-17 14:21:03,270 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-17 14:21:03,270 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-17 14:21:03,270 WARN L1731 CHandler]: Possible shadowing of function new [2025-03-17 14:21:03,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:21:03,351 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:21:03,352 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:03 WrapperNode [2025-03-17 14:21:03,353 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:21:03,354 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:21:03,354 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:21:03,354 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:21:03,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:03" (1/1) ... [2025-03-17 14:21:03,386 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:03" (1/1) ... [2025-03-17 14:21:03,416 INFO L138 Inliner]: procedures = 284, calls = 143, calls flagged for inlining = 11, calls inlined = 12, statements flattened = 355 [2025-03-17 14:21:03,417 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:21:03,417 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:21:03,417 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:21:03,417 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:21:03,424 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:03" (1/1) ... [2025-03-17 14:21:03,424 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:03" (1/1) ... [2025-03-17 14:21:03,433 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:03" (1/1) ... [2025-03-17 14:21:03,461 INFO L175 MemorySlicer]: Split 105 memory accesses to 5 slices as follows [2, 2, 5, 2, 94]. 90 percent of accesses are in the largest equivalence class. The 77 initializations are split as follows [2, 0, 5, 0, 70]. The 15 writes are split as follows [0, 1, 0, 1, 13]. [2025-03-17 14:21:03,464 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:03" (1/1) ... [2025-03-17 14:21:03,464 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:03" (1/1) ... [2025-03-17 14:21:03,489 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:03" (1/1) ... [2025-03-17 14:21:03,493 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:03" (1/1) ... [2025-03-17 14:21:03,498 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:03" (1/1) ... [2025-03-17 14:21:03,502 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:03" (1/1) ... [2025-03-17 14:21:03,507 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:21:03,509 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:21:03,511 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:21:03,511 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:21:03,512 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:03" (1/1) ... [2025-03-17 14:21:03,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:21:03,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:03,555 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) [2025-03-17 14:21:03,558 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 [2025-03-17 14:21:03,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-03-17 14:21:03,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2025-03-17 14:21:03,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2025-03-17 14:21:03,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#3 [2025-03-17 14:21:03,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#4 [2025-03-17 14:21:03,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-17 14:21:03,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-17 14:21:03,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-17 14:21:03,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-03-17 14:21:03,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2025-03-17 14:21:03,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2025-03-17 14:21:03,576 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2025-03-17 14:21:03,576 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2025-03-17 14:21:03,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-17 14:21:03,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-03-17 14:21:03,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2025-03-17 14:21:03,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#3 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#4 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#3 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#4 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#1 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#2 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#3 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#4 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2025-03-17 14:21:03,578 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2025-03-17 14:21:03,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2025-03-17 14:21:03,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:21:03,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:21:03,582 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 14:21:03,717 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:21:03,719 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:21:04,458 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L1082: havoc main_~#t2_ids~0#1.base, main_~#t2_ids~0#1.offset; [2025-03-17 14:21:04,459 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L1082-1: SUMMARY for call ULTIMATE.dealloc(main_~#t2_ids~0#1.base, main_~#t2_ids~0#1.offset); srcloc: null [2025-03-17 14:21:04,459 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L1082-2: havoc main_~#t1_ids~0#1.base, main_~#t1_ids~0#1.offset; [2025-03-17 14:21:04,459 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L1082-3: SUMMARY for call ULTIMATE.dealloc(main_~#t1_ids~0#1.base, main_~#t1_ids~0#1.offset); srcloc: null [2025-03-17 14:21:04,460 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:21:04,460 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:21:05,861 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:21:05,861 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:21:05,861 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:21:05 BoogieIcfgContainer [2025-03-17 14:21:05,861 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:21:05,863 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:21:05,863 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:21:05,867 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:21:05,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:21:02" (1/3) ... [2025-03-17 14:21:05,868 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4486879a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:21:05, skipping insertion in model container [2025-03-17 14:21:05,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:21:03" (2/3) ... [2025-03-17 14:21:05,868 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4486879a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:21:05, skipping insertion in model container [2025-03-17 14:21:05,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:21:05" (3/3) ... [2025-03-17 14:21:05,869 INFO L128 eAbstractionObserver]: Analyzing ICFG 28-race_reach_90-arrayloop2_racing.i [2025-03-17 14:21:05,881 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:21:05,882 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 28-race_reach_90-arrayloop2_racing.i that has 3 procedures, 168 locations, 1 initial locations, 18 loop locations, and 59 error locations. [2025-03-17 14:21:05,882 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:21:05,975 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-17 14:21:06,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 205 transitions, 430 flow [2025-03-17 14:21:06,091 INFO L124 PetriNetUnfolderBase]: 55/340 cut-off events. [2025-03-17 14:21:06,093 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-03-17 14:21:06,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357 conditions, 340 events. 55/340 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1961 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 187. Up to 8 conditions per place. [2025-03-17 14:21:06,099 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 205 transitions, 430 flow [2025-03-17 14:21:06,105 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 205 transitions, 430 flow [2025-03-17 14:21:06,111 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:21:06,122 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;@5c245209, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:21:06,122 INFO L334 AbstractCegarLoop]: Starting to check reachability of 91 error locations. [2025-03-17 14:21:06,131 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:21:06,131 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2025-03-17 14:21:06,132 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:21:06,132 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:06,133 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:21:06,133 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-17 14:21:06,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:06,138 INFO L85 PathProgramCache]: Analyzing trace with hash 944932, now seen corresponding path program 1 times [2025-03-17 14:21:06,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:21:06,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890113189] [2025-03-17 14:21:06,149 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:06,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:06,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:06,151 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) [2025-03-17 14:21:06,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 14:21:06,274 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:21:06,397 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:21:06,398 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:06,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:06,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 14:21:06,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:06,471 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:21:06,471 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:21:06,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890113189] [2025-03-17 14:21:06,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890113189] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:06,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:06,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:21:06,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798650604] [2025-03-17 14:21:06,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:06,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:21:06,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:21:06,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:21:06,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:21:06,727 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 205 [2025-03-17 14:21:06,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 205 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:06,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:06,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 205 [2025-03-17 14:21:06,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:08,404 INFO L124 PetriNetUnfolderBase]: 6915/16116 cut-off events. [2025-03-17 14:21:08,404 INFO L125 PetriNetUnfolderBase]: For 310/334 co-relation queries the response was YES. [2025-03-17 14:21:08,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26599 conditions, 16116 events. 6915/16116 cut-off events. For 310/334 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 158194 event pairs, 4107 based on Foata normal form. 2440/15990 useless extension candidates. Maximal degree in co-relation 25333. Up to 7199 conditions per place. [2025-03-17 14:21:08,583 INFO L140 encePairwiseOnDemand]: 173/205 looper letters, 115 selfloop transitions, 4 changer transitions 0/221 dead transitions. [2025-03-17 14:21:08,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 221 transitions, 700 flow [2025-03-17 14:21:08,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:21:08,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:21:08,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 579 transitions. [2025-03-17 14:21:08,597 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7060975609756097 [2025-03-17 14:21:08,598 INFO L175 Difference]: Start difference. First operand has 174 places, 205 transitions, 430 flow. Second operand 4 states and 579 transitions. [2025-03-17 14:21:08,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 221 transitions, 700 flow [2025-03-17 14:21:08,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 221 transitions, 700 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 14:21:08,610 INFO L231 Difference]: Finished difference. Result has 174 places, 177 transitions, 390 flow [2025-03-17 14:21:08,612 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=390, PETRI_PLACES=174, PETRI_TRANSITIONS=177} [2025-03-17 14:21:08,616 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 0 predicate places. [2025-03-17 14:21:08,617 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 177 transitions, 390 flow [2025-03-17 14:21:08,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:08,617 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:08,618 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:21:08,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 14:21:08,822 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 [2025-03-17 14:21:08,822 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-17 14:21:08,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:08,824 INFO L85 PathProgramCache]: Analyzing trace with hash 944933, now seen corresponding path program 1 times [2025-03-17 14:21:08,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:21:08,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637958652] [2025-03-17 14:21:08,825 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:08,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:08,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:08,828 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) [2025-03-17 14:21:08,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 14:21:08,904 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:21:09,021 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:21:09,022 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:09,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:09,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 14:21:09,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:09,076 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:21:09,076 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:21:09,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637958652] [2025-03-17 14:21:09,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637958652] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:09,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:09,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:21:09,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176713375] [2025-03-17 14:21:09,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:09,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:21:09,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:21:09,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:21:09,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:21:09,250 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 205 [2025-03-17 14:21:09,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 177 transitions, 390 flow. Second operand has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:09,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:09,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 205 [2025-03-17 14:21:09,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:10,521 INFO L124 PetriNetUnfolderBase]: 6854/17172 cut-off events. [2025-03-17 14:21:10,521 INFO L125 PetriNetUnfolderBase]: For 728/752 co-relation queries the response was YES. [2025-03-17 14:21:10,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28432 conditions, 17172 events. 6854/17172 cut-off events. For 728/752 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 175696 event pairs, 5821 based on Foata normal form. 3/14405 useless extension candidates. Maximal degree in co-relation 27068. Up to 10124 conditions per place. [2025-03-17 14:21:10,601 INFO L140 encePairwiseOnDemand]: 197/205 looper letters, 74 selfloop transitions, 5 changer transitions 0/181 dead transitions. [2025-03-17 14:21:10,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 181 transitions, 562 flow [2025-03-17 14:21:10,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:21:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:21:10,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 498 transitions. [2025-03-17 14:21:10,604 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6073170731707317 [2025-03-17 14:21:10,604 INFO L175 Difference]: Start difference. First operand has 174 places, 177 transitions, 390 flow. Second operand 4 states and 498 transitions. [2025-03-17 14:21:10,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 181 transitions, 562 flow [2025-03-17 14:21:10,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 181 transitions, 550 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:21:10,619 INFO L231 Difference]: Finished difference. Result has 176 places, 181 transitions, 423 flow [2025-03-17 14:21:10,620 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=423, PETRI_PLACES=176, PETRI_TRANSITIONS=181} [2025-03-17 14:21:10,621 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 2 predicate places. [2025-03-17 14:21:10,621 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 181 transitions, 423 flow [2025-03-17 14:21:10,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:10,621 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:10,622 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-17 14:21:10,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 14:21:10,826 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 [2025-03-17 14:21:10,826 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-17 14:21:10,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:10,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1913556030, now seen corresponding path program 1 times [2025-03-17 14:21:10,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:21:10,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805383018] [2025-03-17 14:21:10,827 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:10,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:10,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:10,829 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) [2025-03-17 14:21:10,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 14:21:10,908 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:21:11,015 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:21:11,015 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:11,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:11,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-17 14:21:11,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:11,051 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 [2025-03-17 14:21:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:11,056 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:21:11,056 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:21:11,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805383018] [2025-03-17 14:21:11,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805383018] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:11,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:11,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:21:11,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786769362] [2025-03-17 14:21:11,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:11,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:21:11,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:21:11,056 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:21:11,057 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:21:11,155 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 205 [2025-03-17 14:21:11,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 181 transitions, 423 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:11,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:11,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 205 [2025-03-17 14:21:11,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:12,469 INFO L124 PetriNetUnfolderBase]: 6854/17171 cut-off events. [2025-03-17 14:21:12,470 INFO L125 PetriNetUnfolderBase]: For 318/342 co-relation queries the response was YES. [2025-03-17 14:21:12,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27956 conditions, 17171 events. 6854/17171 cut-off events. For 318/342 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 175564 event pairs, 5821 based on Foata normal form. 0/14400 useless extension candidates. Maximal degree in co-relation 27922. Up to 10120 conditions per place. [2025-03-17 14:21:12,576 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 72 selfloop transitions, 3 changer transitions 0/180 dead transitions. [2025-03-17 14:21:12,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 180 transitions, 571 flow [2025-03-17 14:21:12,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:21:12,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:21:12,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2025-03-17 14:21:12,578 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2025-03-17 14:21:12,578 INFO L175 Difference]: Start difference. First operand has 176 places, 181 transitions, 423 flow. Second operand 3 states and 393 transitions. [2025-03-17 14:21:12,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 180 transitions, 571 flow [2025-03-17 14:21:12,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 180 transitions, 568 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:21:12,582 INFO L231 Difference]: Finished difference. Result has 176 places, 180 transitions, 424 flow [2025-03-17 14:21:12,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=424, PETRI_PLACES=176, PETRI_TRANSITIONS=180} [2025-03-17 14:21:12,583 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 2 predicate places. [2025-03-17 14:21:12,583 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 180 transitions, 424 flow [2025-03-17 14:21:12,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:12,583 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:12,583 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-17 14:21:12,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 14:21:12,784 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 [2025-03-17 14:21:12,784 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-17 14:21:12,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:12,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1913556029, now seen corresponding path program 1 times [2025-03-17 14:21:12,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:21:12,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378359043] [2025-03-17 14:21:12,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:12,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:12,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:12,787 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) [2025-03-17 14:21:12,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 14:21:12,868 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:21:12,987 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:21:12,987 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:12,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:13,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 14:21:13,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:13,010 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 [2025-03-17 14:21:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:13,021 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:21:13,021 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:21:13,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378359043] [2025-03-17 14:21:13,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378359043] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:13,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:13,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:21:13,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45196527] [2025-03-17 14:21:13,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:13,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:21:13,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:21:13,022 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:21:13,022 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:21:13,151 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 205 [2025-03-17 14:21:13,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 180 transitions, 424 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:13,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:13,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 205 [2025-03-17 14:21:13,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:14,101 INFO L124 PetriNetUnfolderBase]: 6854/17170 cut-off events. [2025-03-17 14:21:14,101 INFO L125 PetriNetUnfolderBase]: For 320/344 co-relation queries the response was YES. [2025-03-17 14:21:14,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27956 conditions, 17170 events. 6854/17170 cut-off events. For 320/344 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 175549 event pairs, 5821 based on Foata normal form. 0/14401 useless extension candidates. Maximal degree in co-relation 27921. Up to 10120 conditions per place. [2025-03-17 14:21:14,163 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 72 selfloop transitions, 3 changer transitions 0/179 dead transitions. [2025-03-17 14:21:14,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 179 transitions, 572 flow [2025-03-17 14:21:14,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:21:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:21:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2025-03-17 14:21:14,165 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2025-03-17 14:21:14,165 INFO L175 Difference]: Start difference. First operand has 176 places, 180 transitions, 424 flow. Second operand 3 states and 393 transitions. [2025-03-17 14:21:14,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 179 transitions, 572 flow [2025-03-17 14:21:14,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 179 transitions, 566 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:21:14,168 INFO L231 Difference]: Finished difference. Result has 175 places, 179 transitions, 422 flow [2025-03-17 14:21:14,169 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=422, PETRI_PLACES=175, PETRI_TRANSITIONS=179} [2025-03-17 14:21:14,169 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 1 predicate places. [2025-03-17 14:21:14,169 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 179 transitions, 422 flow [2025-03-17 14:21:14,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:14,169 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:14,169 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-03-17 14:21:14,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 14:21:14,370 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 [2025-03-17 14:21:14,370 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-17 14:21:14,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:14,370 INFO L85 PathProgramCache]: Analyzing trace with hash 809304492, now seen corresponding path program 1 times [2025-03-17 14:21:14,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:21:14,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92134110] [2025-03-17 14:21:14,371 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:14,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:14,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:14,374 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) [2025-03-17 14:21:14,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 14:21:14,441 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 14:21:14,547 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 14:21:14,547 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:14,547 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:14,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-17 14:21:14,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:14,567 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:21:14,568 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:21:14,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92134110] [2025-03-17 14:21:14,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92134110] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:14,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:14,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:21:14,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128221966] [2025-03-17 14:21:14,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:14,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:21:14,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:21:14,568 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:21:14,568 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:21:14,569 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 205 [2025-03-17 14:21:14,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 179 transitions, 422 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:14,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:14,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 205 [2025-03-17 14:21:14,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:15,566 INFO L124 PetriNetUnfolderBase]: 6853/17192 cut-off events. [2025-03-17 14:21:15,566 INFO L125 PetriNetUnfolderBase]: For 322/346 co-relation queries the response was YES. [2025-03-17 14:21:15,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27984 conditions, 17192 events. 6853/17192 cut-off events. For 322/346 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 175633 event pairs, 5821 based on Foata normal form. 2/14414 useless extension candidates. Maximal degree in co-relation 27952. Up to 10120 conditions per place. [2025-03-17 14:21:15,635 INFO L140 encePairwiseOnDemand]: 202/205 looper letters, 76 selfloop transitions, 3 changer transitions 0/183 dead transitions. [2025-03-17 14:21:15,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 183 transitions, 592 flow [2025-03-17 14:21:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:21:15,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:21:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2025-03-17 14:21:15,636 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6520325203252032 [2025-03-17 14:21:15,636 INFO L175 Difference]: Start difference. First operand has 175 places, 179 transitions, 422 flow. Second operand 3 states and 401 transitions. [2025-03-17 14:21:15,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 183 transitions, 592 flow [2025-03-17 14:21:15,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 183 transitions, 582 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:21:15,639 INFO L231 Difference]: Finished difference. Result has 176 places, 179 transitions, 427 flow [2025-03-17 14:21:15,640 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=427, PETRI_PLACES=176, PETRI_TRANSITIONS=179} [2025-03-17 14:21:15,640 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 2 predicate places. [2025-03-17 14:21:15,640 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 179 transitions, 427 flow [2025-03-17 14:21:15,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:15,640 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:15,640 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:15,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 14:21:15,841 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 [2025-03-17 14:21:15,841 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-17 14:21:15,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:15,841 INFO L85 PathProgramCache]: Analyzing trace with hash 809306140, now seen corresponding path program 1 times [2025-03-17 14:21:15,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:21:15,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541764202] [2025-03-17 14:21:15,842 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:15,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:15,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:15,845 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) [2025-03-17 14:21:15,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 14:21:15,916 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 14:21:16,022 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 14:21:16,023 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:16,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:16,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 14:21:16,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:16,045 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:21:16,045 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:21:16,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541764202] [2025-03-17 14:21:16,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541764202] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:16,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:16,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:21:16,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881504310] [2025-03-17 14:21:16,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:16,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:21:16,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:21:16,046 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:21:16,046 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:21:16,137 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 205 [2025-03-17 14:21:16,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 179 transitions, 427 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:16,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:16,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 205 [2025-03-17 14:21:16,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:17,004 INFO L124 PetriNetUnfolderBase]: 6853/17188 cut-off events. [2025-03-17 14:21:17,005 INFO L125 PetriNetUnfolderBase]: For 327/351 co-relation queries the response was YES. [2025-03-17 14:21:17,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27986 conditions, 17188 events. 6853/17188 cut-off events. For 327/351 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 175551 event pairs, 5821 based on Foata normal form. 0/14414 useless extension candidates. Maximal degree in co-relation 27951. Up to 10125 conditions per place. [2025-03-17 14:21:17,072 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 72 selfloop transitions, 5 changer transitions 0/177 dead transitions. [2025-03-17 14:21:17,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 177 transitions, 577 flow [2025-03-17 14:21:17,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:21:17,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:21:17,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2025-03-17 14:21:17,074 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2025-03-17 14:21:17,074 INFO L175 Difference]: Start difference. First operand has 176 places, 179 transitions, 427 flow. Second operand 3 states and 381 transitions. [2025-03-17 14:21:17,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 177 transitions, 577 flow [2025-03-17 14:21:17,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 177 transitions, 574 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:21:17,077 INFO L231 Difference]: Finished difference. Result has 175 places, 177 transitions, 430 flow [2025-03-17 14:21:17,077 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=430, PETRI_PLACES=175, PETRI_TRANSITIONS=177} [2025-03-17 14:21:17,077 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 1 predicate places. [2025-03-17 14:21:17,077 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 177 transitions, 430 flow [2025-03-17 14:21:17,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:17,078 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:17,078 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:17,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 14:21:17,278 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 [2025-03-17 14:21:17,278 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-17 14:21:17,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:17,278 INFO L85 PathProgramCache]: Analyzing trace with hash 809306141, now seen corresponding path program 1 times [2025-03-17 14:21:17,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:21:17,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449229774] [2025-03-17 14:21:17,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:17,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:17,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:17,280 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) [2025-03-17 14:21:17,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 14:21:17,343 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 14:21:17,472 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 14:21:17,472 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:17,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:17,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:21:17,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:17,495 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 [2025-03-17 14:21:17,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:17,510 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:21:17,510 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:21:17,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449229774] [2025-03-17 14:21:17,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449229774] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:17,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:17,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:21:17,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822986290] [2025-03-17 14:21:17,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:17,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:21:17,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:21:17,511 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:21:17,511 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:21:17,701 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 205 [2025-03-17 14:21:17,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 177 transitions, 430 flow. Second operand has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:17,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:17,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 205 [2025-03-17 14:21:17,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:18,973 INFO L124 PetriNetUnfolderBase]: 6853/17184 cut-off events. [2025-03-17 14:21:18,973 INFO L125 PetriNetUnfolderBase]: For 330/354 co-relation queries the response was YES. [2025-03-17 14:21:19,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27987 conditions, 17184 events. 6853/17184 cut-off events. For 330/354 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 175697 event pairs, 5821 based on Foata normal form. 4/14414 useless extension candidates. Maximal degree in co-relation 27948. Up to 10124 conditions per place. [2025-03-17 14:21:19,078 INFO L140 encePairwiseOnDemand]: 200/205 looper letters, 73 selfloop transitions, 4 changer transitions 0/175 dead transitions. [2025-03-17 14:21:19,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 175 transitions, 580 flow [2025-03-17 14:21:19,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:21:19,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:21:19,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2025-03-17 14:21:19,080 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5939024390243902 [2025-03-17 14:21:19,080 INFO L175 Difference]: Start difference. First operand has 175 places, 177 transitions, 430 flow. Second operand 4 states and 487 transitions. [2025-03-17 14:21:19,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 175 transitions, 580 flow [2025-03-17 14:21:19,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 175 transitions, 570 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:21:19,084 INFO L231 Difference]: Finished difference. Result has 174 places, 175 transitions, 424 flow [2025-03-17 14:21:19,084 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=424, PETRI_PLACES=174, PETRI_TRANSITIONS=175} [2025-03-17 14:21:19,085 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 0 predicate places. [2025-03-17 14:21:19,085 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 175 transitions, 424 flow [2025-03-17 14:21:19,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.5) internal successors, (418), 4 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:19,085 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:19,085 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:19,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-17 14:21:19,285 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 [2025-03-17 14:21:19,286 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-17 14:21:19,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:19,286 INFO L85 PathProgramCache]: Analyzing trace with hash 354149316, now seen corresponding path program 1 times [2025-03-17 14:21:19,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:21:19,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230852241] [2025-03-17 14:21:19,287 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:19,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:19,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:19,288 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) [2025-03-17 14:21:19,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 14:21:19,369 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:21:19,505 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:21:19,505 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:19,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:19,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 14:21:19,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:19,572 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-03-17 14:21:19,572 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 [2025-03-17 14:21:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:19,605 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:21:19,605 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:21:19,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230852241] [2025-03-17 14:21:19,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230852241] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:19,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:19,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:21:19,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091107297] [2025-03-17 14:21:19,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:19,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:21:19,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:21:19,606 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:21:19,606 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:21:19,772 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 205 [2025-03-17 14:21:19,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 175 transitions, 424 flow. Second operand has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:19,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:19,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 205 [2025-03-17 14:21:19,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:20,799 INFO L124 PetriNetUnfolderBase]: 6915/16129 cut-off events. [2025-03-17 14:21:20,799 INFO L125 PetriNetUnfolderBase]: For 375/399 co-relation queries the response was YES. [2025-03-17 14:21:20,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27227 conditions, 16129 events. 6915/16129 cut-off events. For 375/399 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 157986 event pairs, 4107 based on Foata normal form. 2/13658 useless extension candidates. Maximal degree in co-relation 27192. Up to 7202 conditions per place. [2025-03-17 14:21:20,858 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 116 selfloop transitions, 5 changer transitions 0/217 dead transitions. [2025-03-17 14:21:20,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 217 transitions, 750 flow [2025-03-17 14:21:20,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:21:20,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:21:20,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 535 transitions. [2025-03-17 14:21:20,860 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6524390243902439 [2025-03-17 14:21:20,860 INFO L175 Difference]: Start difference. First operand has 174 places, 175 transitions, 424 flow. Second operand 4 states and 535 transitions. [2025-03-17 14:21:20,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 217 transitions, 750 flow [2025-03-17 14:21:20,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 217 transitions, 742 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:21:20,864 INFO L231 Difference]: Finished difference. Result has 172 places, 173 transitions, 422 flow [2025-03-17 14:21:20,864 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=422, PETRI_PLACES=172, PETRI_TRANSITIONS=173} [2025-03-17 14:21:20,864 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, -2 predicate places. [2025-03-17 14:21:20,864 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 173 transitions, 422 flow [2025-03-17 14:21:20,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.75) internal successors, (423), 4 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:20,864 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:20,864 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:20,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-17 14:21:21,065 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 [2025-03-17 14:21:21,065 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-17 14:21:21,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:21,065 INFO L85 PathProgramCache]: Analyzing trace with hash 354149317, now seen corresponding path program 1 times [2025-03-17 14:21:21,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:21:21,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722875067] [2025-03-17 14:21:21,066 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:21,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:21,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:21,068 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) [2025-03-17 14:21:21,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 14:21:21,141 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 14:21:21,268 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 14:21:21,268 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:21,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:21,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 14:21:21,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:21,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:21:21,344 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 [2025-03-17 14:21:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:21,379 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:21:21,379 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:21:21,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722875067] [2025-03-17 14:21:21,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722875067] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:21,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:21,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:21:21,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805488595] [2025-03-17 14:21:21,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:21,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:21:21,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:21:21,380 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:21:21,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:21:21,777 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 205 [2025-03-17 14:21:21,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 173 transitions, 422 flow. Second operand has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:21,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:21,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 205 [2025-03-17 14:21:21,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:22,933 INFO L124 PetriNetUnfolderBase]: 6992/17502 cut-off events. [2025-03-17 14:21:22,933 INFO L125 PetriNetUnfolderBase]: For 825/849 co-relation queries the response was YES. [2025-03-17 14:21:22,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29105 conditions, 17502 events. 6992/17502 cut-off events. For 825/849 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 179502 event pairs, 5947 based on Foata normal form. 2/14698 useless extension candidates. Maximal degree in co-relation 29013. Up to 10353 conditions per place. [2025-03-17 14:21:22,996 INFO L140 encePairwiseOnDemand]: 199/205 looper letters, 81 selfloop transitions, 5 changer transitions 0/180 dead transitions. [2025-03-17 14:21:22,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 180 transitions, 624 flow [2025-03-17 14:21:22,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:21:22,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:21:22,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 501 transitions. [2025-03-17 14:21:22,998 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6109756097560975 [2025-03-17 14:21:22,998 INFO L175 Difference]: Start difference. First operand has 172 places, 173 transitions, 422 flow. Second operand 4 states and 501 transitions. [2025-03-17 14:21:22,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 180 transitions, 624 flow [2025-03-17 14:21:23,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 180 transitions, 608 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:21:23,005 INFO L231 Difference]: Finished difference. Result has 174 places, 177 transitions, 458 flow [2025-03-17 14:21:23,005 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=458, PETRI_PLACES=174, PETRI_TRANSITIONS=177} [2025-03-17 14:21:23,006 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 0 predicate places. [2025-03-17 14:21:23,006 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 177 transitions, 458 flow [2025-03-17 14:21:23,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.4) internal successors, (527), 5 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:23,006 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:23,006 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:23,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-17 14:21:23,207 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 [2025-03-17 14:21:23,207 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-17 14:21:23,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:23,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1906272160, now seen corresponding path program 1 times [2025-03-17 14:21:23,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:21:23,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381807865] [2025-03-17 14:21:23,208 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:23,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:23,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:23,209 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) [2025-03-17 14:21:23,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 14:21:23,284 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:21:23,425 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:21:23,425 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:23,425 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:23,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-17 14:21:23,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:23,517 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 [2025-03-17 14:21:23,545 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 19 treesize of output 18 [2025-03-17 14:21:23,581 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-17 14:21:23,581 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 [2025-03-17 14:21:23,612 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 16 [2025-03-17 14:21:23,645 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 16 [2025-03-17 14:21:23,666 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 16 [2025-03-17 14:21:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:23,704 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:21:23,704 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:21:23,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381807865] [2025-03-17 14:21:23,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381807865] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:23,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:23,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 14:21:23,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037194539] [2025-03-17 14:21:23,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:23,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:21:23,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:21:23,705 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:21:23,705 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:21:25,456 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 205 [2025-03-17 14:21:25,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 177 transitions, 458 flow. Second operand has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:25,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:25,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 205 [2025-03-17 14:21:25,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:27,097 INFO L124 PetriNetUnfolderBase]: 6992/17501 cut-off events. [2025-03-17 14:21:27,097 INFO L125 PetriNetUnfolderBase]: For 400/424 co-relation queries the response was YES. [2025-03-17 14:21:27,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28652 conditions, 17501 events. 6992/17501 cut-off events. For 400/424 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 179361 event pairs, 5947 based on Foata normal form. 0/14710 useless extension candidates. Maximal degree in co-relation 28559. Up to 10362 conditions per place. [2025-03-17 14:21:27,168 INFO L140 encePairwiseOnDemand]: 193/205 looper letters, 94 selfloop transitions, 11 changer transitions 0/193 dead transitions. [2025-03-17 14:21:27,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 193 transitions, 706 flow [2025-03-17 14:21:27,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 14:21:27,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 14:21:27,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1106 transitions. [2025-03-17 14:21:27,171 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4904656319290466 [2025-03-17 14:21:27,171 INFO L175 Difference]: Start difference. First operand has 174 places, 177 transitions, 458 flow. Second operand 11 states and 1106 transitions. [2025-03-17 14:21:27,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 193 transitions, 706 flow [2025-03-17 14:21:27,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 193 transitions, 704 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:21:27,174 INFO L231 Difference]: Finished difference. Result has 188 places, 182 transitions, 514 flow [2025-03-17 14:21:27,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=514, PETRI_PLACES=188, PETRI_TRANSITIONS=182} [2025-03-17 14:21:27,175 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 14 predicate places. [2025-03-17 14:21:27,175 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 182 transitions, 514 flow [2025-03-17 14:21:27,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:27,175 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:27,175 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:27,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-17 14:21:27,376 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 [2025-03-17 14:21:27,376 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-17 14:21:27,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:27,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1906272159, now seen corresponding path program 1 times [2025-03-17 14:21:27,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:21:27,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275472088] [2025-03-17 14:21:27,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:27,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:27,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:27,378 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:27,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 14:21:27,458 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 14:21:27,601 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:21:27,601 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:27,601 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:27,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-17 14:21:27,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:27,674 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 [2025-03-17 14:21:27,683 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 [2025-03-17 14:21:27,726 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 19 treesize of output 18 [2025-03-17 14:21:27,732 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 [2025-03-17 14:21:27,782 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 14:21:27,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2025-03-17 14:21:27,798 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-17 14:21:27,798 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 [2025-03-17 14:21:27,833 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 16 treesize of output 11 [2025-03-17 14:21:27,839 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 16 [2025-03-17 14:21:27,882 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 16 treesize of output 11 [2025-03-17 14:21:27,890 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 16 [2025-03-17 14:21:27,919 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 16 [2025-03-17 14:21:27,926 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 16 treesize of output 11 [2025-03-17 14:21:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:27,972 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:21:27,973 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:21:27,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275472088] [2025-03-17 14:21:27,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275472088] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:27,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:27,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 14:21:27,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760206765] [2025-03-17 14:21:27,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:27,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:21:27,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:21:27,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:21:27,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:21:29,171 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 205 [2025-03-17 14:21:29,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 182 transitions, 514 flow. Second operand has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:29,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:29,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 205 [2025-03-17 14:21:29,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:30,597 INFO L124 PetriNetUnfolderBase]: 6992/17500 cut-off events. [2025-03-17 14:21:30,597 INFO L125 PetriNetUnfolderBase]: For 411/435 co-relation queries the response was YES. [2025-03-17 14:21:30,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28689 conditions, 17500 events. 6992/17500 cut-off events. For 411/435 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 179384 event pairs, 5947 based on Foata normal form. 1/14713 useless extension candidates. Maximal degree in co-relation 28608. Up to 10366 conditions per place. [2025-03-17 14:21:30,657 INFO L140 encePairwiseOnDemand]: 193/205 looper letters, 96 selfloop transitions, 11 changer transitions 0/193 dead transitions. [2025-03-17 14:21:30,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 193 transitions, 758 flow [2025-03-17 14:21:30,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 14:21:30,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 14:21:30,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1086 transitions. [2025-03-17 14:21:30,660 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4815964523281596 [2025-03-17 14:21:30,660 INFO L175 Difference]: Start difference. First operand has 188 places, 182 transitions, 514 flow. Second operand 11 states and 1086 transitions. [2025-03-17 14:21:30,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 193 transitions, 758 flow [2025-03-17 14:21:30,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 193 transitions, 754 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:21:30,663 INFO L231 Difference]: Finished difference. Result has 197 places, 182 transitions, 536 flow [2025-03-17 14:21:30,663 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=536, PETRI_PLACES=197, PETRI_TRANSITIONS=182} [2025-03-17 14:21:30,664 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 23 predicate places. [2025-03-17 14:21:30,664 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 182 transitions, 536 flow [2025-03-17 14:21:30,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 90.0) internal successors, (900), 10 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:30,664 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:30,664 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:30,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-17 14:21:30,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:30,865 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-17 14:21:30,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:30,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1035106036, now seen corresponding path program 1 times [2025-03-17 14:21:30,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:21:30,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72207133] [2025-03-17 14:21:30,865 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:30,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:30,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:30,867 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) [2025-03-17 14:21:30,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 14:21:30,939 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:21:31,062 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:21:31,062 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:31,062 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:31,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 14:21:31,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:31,085 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 [2025-03-17 14:21:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:31,113 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:21:31,113 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:21:31,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72207133] [2025-03-17 14:21:31,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72207133] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:31,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:31,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:21:31,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950778689] [2025-03-17 14:21:31,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:31,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:21:31,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:21:31,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:21:31,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:21:31,277 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 205 [2025-03-17 14:21:31,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 182 transitions, 536 flow. Second operand has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:31,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:31,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 205 [2025-03-17 14:21:31,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:32,306 INFO L124 PetriNetUnfolderBase]: 6854/17200 cut-off events. [2025-03-17 14:21:32,306 INFO L125 PetriNetUnfolderBase]: For 374/398 co-relation queries the response was YES. [2025-03-17 14:21:32,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28078 conditions, 17200 events. 6854/17200 cut-off events. For 374/398 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 175861 event pairs, 5821 based on Foata normal form. 8/14439 useless extension candidates. Maximal degree in co-relation 28004. Up to 10121 conditions per place. [2025-03-17 14:21:32,371 INFO L140 encePairwiseOnDemand]: 200/205 looper letters, 73 selfloop transitions, 9 changer transitions 0/180 dead transitions. [2025-03-17 14:21:32,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 180 transitions, 696 flow [2025-03-17 14:21:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:21:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:21:32,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 493 transitions. [2025-03-17 14:21:32,372 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6012195121951219 [2025-03-17 14:21:32,372 INFO L175 Difference]: Start difference. First operand has 197 places, 182 transitions, 536 flow. Second operand 4 states and 493 transitions. [2025-03-17 14:21:32,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 180 transitions, 696 flow [2025-03-17 14:21:32,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 180 transitions, 674 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-03-17 14:21:32,376 INFO L231 Difference]: Finished difference. Result has 188 places, 180 transitions, 528 flow [2025-03-17 14:21:32,376 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=528, PETRI_PLACES=188, PETRI_TRANSITIONS=180} [2025-03-17 14:21:32,376 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 14 predicate places. [2025-03-17 14:21:32,377 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 180 transitions, 528 flow [2025-03-17 14:21:32,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:32,377 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:32,377 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:32,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-17 14:21:32,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:32,577 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-17 14:21:32,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:32,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1035106035, now seen corresponding path program 1 times [2025-03-17 14:21:32,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:21:32,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805312836] [2025-03-17 14:21:32,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:32,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:32,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:32,581 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:21:32,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 14:21:32,665 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:21:32,780 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:21:32,780 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:32,780 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:32,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 14:21:32,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:32,809 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:21:32,809 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:21:32,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805312836] [2025-03-17 14:21:32,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805312836] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:21:32,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:21:32,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:21:32,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904553323] [2025-03-17 14:21:32,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:21:32,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:21:32,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:21:32,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:21:32,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:21:32,887 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 205 [2025-03-17 14:21:32,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 180 transitions, 528 flow. Second operand has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:32,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:32,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 205 [2025-03-17 14:21:32,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:33,938 INFO L124 PetriNetUnfolderBase]: 6854/17192 cut-off events. [2025-03-17 14:21:33,938 INFO L125 PetriNetUnfolderBase]: For 379/403 co-relation queries the response was YES. [2025-03-17 14:21:33,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28079 conditions, 17192 events. 6854/17192 cut-off events. For 379/403 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 175810 event pairs, 5821 based on Foata normal form. 0/14431 useless extension candidates. Maximal degree in co-relation 28012. Up to 10121 conditions per place. [2025-03-17 14:21:34,025 INFO L140 encePairwiseOnDemand]: 200/205 looper letters, 75 selfloop transitions, 9 changer transitions 0/178 dead transitions. [2025-03-17 14:21:34,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 178 transitions, 692 flow [2025-03-17 14:21:34,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:21:34,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:21:34,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2025-03-17 14:21:34,027 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5939024390243902 [2025-03-17 14:21:34,027 INFO L175 Difference]: Start difference. First operand has 188 places, 180 transitions, 528 flow. Second operand 4 states and 487 transitions. [2025-03-17 14:21:34,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 178 transitions, 692 flow [2025-03-17 14:21:34,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 178 transitions, 674 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:21:34,030 INFO L231 Difference]: Finished difference. Result has 186 places, 178 transitions, 524 flow [2025-03-17 14:21:34,031 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=524, PETRI_PLACES=186, PETRI_TRANSITIONS=178} [2025-03-17 14:21:34,031 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 12 predicate places. [2025-03-17 14:21:34,031 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 178 transitions, 524 flow [2025-03-17 14:21:34,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:34,031 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:34,031 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:34,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-17 14:21:34,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:34,232 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-17 14:21:34,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:34,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1410167800, now seen corresponding path program 1 times [2025-03-17 14:21:34,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:21:34,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345104809] [2025-03-17 14:21:34,232 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:34,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:34,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:34,234 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) [2025-03-17 14:21:34,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 14:21:34,313 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-17 14:21:34,427 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-17 14:21:34,427 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:34,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:34,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-17 14:21:34,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:34,457 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:34,479 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:21:34,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345104809] [2025-03-17 14:21:34,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345104809] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:21:34,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:21:34,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2025-03-17 14:21:34,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839033023] [2025-03-17 14:21:34,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-17 14:21:34,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:21:34,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:21:34,480 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:21:34,480 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:21:34,480 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 205 [2025-03-17 14:21:34,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 178 transitions, 524 flow. Second operand has 6 states, 6 states have (on average 110.83333333333333) internal successors, (665), 6 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:34,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:34,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 205 [2025-03-17 14:21:34,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:35,623 INFO L124 PetriNetUnfolderBase]: 6854/17242 cut-off events. [2025-03-17 14:21:35,623 INFO L125 PetriNetUnfolderBase]: For 458/482 co-relation queries the response was YES. [2025-03-17 14:21:35,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28205 conditions, 17242 events. 6854/17242 cut-off events. For 458/482 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 176321 event pairs, 5821 based on Foata normal form. 6/14483 useless extension candidates. Maximal degree in co-relation 28130. Up to 10117 conditions per place. [2025-03-17 14:21:35,701 INFO L140 encePairwiseOnDemand]: 201/205 looper letters, 90 selfloop transitions, 11 changer transitions 0/197 dead transitions. [2025-03-17 14:21:35,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 197 transitions, 848 flow [2025-03-17 14:21:35,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:21:35,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:21:35,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2025-03-17 14:21:35,702 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-03-17 14:21:35,702 INFO L175 Difference]: Start difference. First operand has 186 places, 178 transitions, 524 flow. Second operand 6 states and 738 transitions. [2025-03-17 14:21:35,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 197 transitions, 848 flow [2025-03-17 14:21:35,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 197 transitions, 804 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:21:35,706 INFO L231 Difference]: Finished difference. Result has 192 places, 183 transitions, 592 flow [2025-03-17 14:21:35,706 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=592, PETRI_PLACES=192, PETRI_TRANSITIONS=183} [2025-03-17 14:21:35,707 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 18 predicate places. [2025-03-17 14:21:35,707 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 183 transitions, 592 flow [2025-03-17 14:21:35,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 110.83333333333333) internal successors, (665), 6 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:35,707 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:35,707 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:35,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-17 14:21:35,907 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 [2025-03-17 14:21:35,908 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-17 14:21:35,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:35,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1183801211, now seen corresponding path program 1 times [2025-03-17 14:21:35,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:21:35,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511445319] [2025-03-17 14:21:35,908 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:35,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:35,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:35,910 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) [2025-03-17 14:21:35,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-17 14:21:35,992 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 14:21:36,152 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 14:21:36,152 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:36,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:36,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-17 14:21:36,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:36,181 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 [2025-03-17 14:21:36,185 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 [2025-03-17 14:21:36,316 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 23 treesize of output 1 [2025-03-17 14:21:36,319 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 11 [2025-03-17 14:21:36,355 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2025-03-17 14:21:36,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2025-03-17 14:21:36,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2025-03-17 14:21:36,396 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 20 treesize of output 15 [2025-03-17 14:21:36,403 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 34 treesize of output 27 [2025-03-17 14:21:36,432 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 20 treesize of output 15 [2025-03-17 14:21:36,438 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 34 treesize of output 27 [2025-03-17 14:21:36,452 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 26 treesize of output 19 [2025-03-17 14:21:36,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 14:21:36,481 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 17 treesize of output 9 [2025-03-17 14:21:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:36,501 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:36,595 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_577 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#4.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_577) |c_~#c~0.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_577 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_578 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#4.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_577) |c_~#c~0.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#4.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_578) |c_~#c~0.base|) .cse1)))))) is different from false [2025-03-17 14:21:36,934 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:21:36,934 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 49 [2025-03-17 14:21:36,941 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:21:36,941 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 41 [2025-03-17 14:21:36,958 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:21:36,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 74 treesize of output 77 [2025-03-17 14:21:36,985 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:21:36,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 118 treesize of output 113 [2025-03-17 14:21:36,998 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 26 treesize of output 20 [2025-03-17 14:21:37,004 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 20 treesize of output 14 [2025-03-17 14:21:37,422 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:21:37,422 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 38 [2025-03-17 14:21:37,434 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:21:37,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 60 treesize of output 55 [2025-03-17 14:21:37,441 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 23 treesize of output 11 [2025-03-17 14:21:40,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2025-03-17 14:21:40,250 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:21:40,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511445319] [2025-03-17 14:21:40,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511445319] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:21:40,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:21:40,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2025-03-17 14:21:40,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172210088] [2025-03-17 14:21:40,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-17 14:21:40,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 14:21:40,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:21:40,251 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 14:21:40,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=253, Unknown=9, NotChecked=32, Total=342 [2025-03-17 14:21:41,748 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 205 [2025-03-17 14:21:41,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 183 transitions, 592 flow. Second operand has 19 states, 19 states have (on average 39.78947368421053) internal successors, (756), 19 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:41,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:21:41,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 205 [2025-03-17 14:21:41,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:21:53,403 INFO L124 PetriNetUnfolderBase]: 47892/84384 cut-off events. [2025-03-17 14:21:53,403 INFO L125 PetriNetUnfolderBase]: For 748/748 co-relation queries the response was YES. [2025-03-17 14:21:53,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157196 conditions, 84384 events. 47892/84384 cut-off events. For 748/748 co-relation queries the response was YES. Maximal size of possible extension queue 2700. Compared 822683 event pairs, 43378 based on Foata normal form. 6/53075 useless extension candidates. Maximal degree in co-relation 157126. Up to 70728 conditions per place. [2025-03-17 14:21:54,010 INFO L140 encePairwiseOnDemand]: 195/205 looper letters, 130 selfloop transitions, 26 changer transitions 0/194 dead transitions. [2025-03-17 14:21:54,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 194 transitions, 944 flow [2025-03-17 14:21:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 14:21:54,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-17 14:21:54,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 634 transitions. [2025-03-17 14:21:54,013 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2378986866791745 [2025-03-17 14:21:54,013 INFO L175 Difference]: Start difference. First operand has 192 places, 183 transitions, 592 flow. Second operand 13 states and 634 transitions. [2025-03-17 14:21:54,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 194 transitions, 944 flow [2025-03-17 14:21:54,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 194 transitions, 928 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-17 14:21:54,018 INFO L231 Difference]: Finished difference. Result has 207 places, 190 transitions, 675 flow [2025-03-17 14:21:54,019 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=675, PETRI_PLACES=207, PETRI_TRANSITIONS=190} [2025-03-17 14:21:54,019 INFO L279 CegarLoopForPetriNet]: 174 programPoint places, 33 predicate places. [2025-03-17 14:21:54,019 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 190 transitions, 675 flow [2025-03-17 14:21:54,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 39.78947368421053) internal successors, (756), 19 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:21:54,019 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:21:54,019 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:21:54,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-17 14:21:54,220 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 [2025-03-17 14:21:54,220 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 88 more)] === [2025-03-17 14:21:54,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:21:54,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1183801212, now seen corresponding path program 1 times [2025-03-17 14:21:54,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-17 14:21:54,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945086] [2025-03-17 14:21:54,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:21:54,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:21:54,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:21:54,222 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) [2025-03-17 14:21:54,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-17 14:21:54,467 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-03-17 14:21:54,618 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-03-17 14:21:54,618 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:21:54,618 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:21:54,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-17 14:21:54,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:21:54,714 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 23 treesize of output 1 [2025-03-17 14:21:54,762 INFO L349 Elim1Store]: treesize reduction 86, result has 31.2 percent of original size [2025-03-17 14:21:54,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 59 [2025-03-17 14:21:54,805 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 36 treesize of output 29 [2025-03-17 14:21:54,839 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 36 treesize of output 29 [2025-03-17 14:21:54,859 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 28 treesize of output 21 [2025-03-17 14:21:54,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 [2025-03-17 14:21:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:21:54,952 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:21:54,990 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#4.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_679) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|))))))) is different from false [2025-03-17 14:21:55,103 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:21:55,104 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2025-03-17 14:21:55,113 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 14:21:55,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 52 treesize of output 55 [2025-03-17 14:21:55,118 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 20 treesize of output 14 [2025-03-17 14:22:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2025-03-17 14:22:08,179 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-17 14:22:08,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945086] [2025-03-17 14:22:08,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945086] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:22:08,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:22:08,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-03-17 14:22:08,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59988411] [2025-03-17 14:22:08,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-17 14:22:08,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:22:08,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-17 14:22:08,180 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:22:08,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=209, Unknown=18, NotChecked=30, Total=306 [2025-03-17 14:22:12,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:22:16,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:22:20,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:22:21,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:22:26,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:22:31,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1]