./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-10 00:56:09,504 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-10 00:56:09,561 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-01-10 00:56:09,564 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-10 00:56:09,564 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-10 00:56:09,583 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-10 00:56:09,584 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-10 00:56:09,584 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-10 00:56:09,584 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-10 00:56:09,585 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-10 00:56:09,585 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-10 00:56:09,585 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-10 00:56:09,585 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-10 00:56:09,585 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-10 00:56:09,585 INFO L153 SettingsManager]: * Use SBE=true [2025-01-10 00:56:09,585 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-10 00:56:09,585 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-10 00:56:09,586 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-10 00:56:09,586 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-10 00:56:09,586 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-10 00:56:09,586 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-10 00:56:09,586 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-10 00:56:09,586 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-10 00:56:09,586 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-10 00:56:09,586 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-10 00:56:09,586 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-10 00:56:09,586 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-10 00:56:09,586 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-10 00:56:09,586 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-10 00:56:09,586 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-10 00:56:09,587 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 00:56:09,587 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 00:56:09,587 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 00:56:09,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 00:56:09,587 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-10 00:56:09,587 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 00:56:09,587 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 00:56:09,587 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 00:56:09,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 00:56:09,587 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-10 00:56:09,587 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-10 00:56:09,587 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-10 00:56:09,588 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-10 00:56:09,588 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-10 00:56:09,588 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-10 00:56:09,588 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-10 00:56:09,588 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-10 00:56:09,588 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-jdk21/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 -> 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a [2025-01-10 00:56:09,794 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-10 00:56:09,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-10 00:56:09,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-10 00:56:09,807 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-10 00:56:09,808 INFO L274 PluginConnector]: CDTParser initialized [2025-01-10 00:56:09,809 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2025-01-10 00:56:10,995 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7e1146d92/ede9e31bebbd45788d37085e9dbfe555/FLAG45648acd0 [2025-01-10 00:56:11,320 INFO L384 CDTParser]: Found 1 translation units. [2025-01-10 00:56:11,321 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2025-01-10 00:56:11,338 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7e1146d92/ede9e31bebbd45788d37085e9dbfe555/FLAG45648acd0 [2025-01-10 00:56:11,352 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7e1146d92/ede9e31bebbd45788d37085e9dbfe555 [2025-01-10 00:56:11,354 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-10 00:56:11,356 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-10 00:56:11,357 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-10 00:56:11,357 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-10 00:56:11,360 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-10 00:56:11,361 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:56:11" (1/1) ... [2025-01-10 00:56:11,361 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58e08539 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:11, skipping insertion in model container [2025-01-10 00:56:11,362 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:56:11" (1/1) ... [2025-01-10 00:56:11,395 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 00:56:11,680 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:11,680 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:11,680 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:11,681 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:11,699 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 00:56:11,725 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) [2025-01-10 00:56:11,725 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@48097ca4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:11, skipping insertion in model container [2025-01-10 00:56:11,725 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-10 00:56:11,726 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-01-10 00:56:11,727 INFO L158 Benchmark]: Toolchain (without parser) took 371.02ms. Allocated memory is still 142.6MB. Free memory was 103.6MB in the beginning and 87.3MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-01-10 00:56:11,727 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 201.3MB. Free memory is still 126.3MB. There was no memory consumed. Max. memory is 16.1GB. [2025-01-10 00:56:11,727 INFO L158 Benchmark]: CACSL2BoogieTranslator took 368.69ms. Allocated memory is still 142.6MB. Free memory was 103.6MB in the beginning and 87.3MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-01-10 00:56:11,728 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 201.3MB. Free memory is still 126.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 368.69ms. Allocated memory is still 142.6MB. Free memory was 103.6MB in the beginning and 87.3MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1045]: 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-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-10 00:56:13,583 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-10 00:56:13,664 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-01-10 00:56:13,668 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-10 00:56:13,668 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-10 00:56:13,683 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-10 00:56:13,683 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-10 00:56:13,684 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-10 00:56:13,684 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-10 00:56:13,684 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-10 00:56:13,684 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-10 00:56:13,684 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-10 00:56:13,684 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-10 00:56:13,684 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-10 00:56:13,685 INFO L153 SettingsManager]: * Use SBE=true [2025-01-10 00:56:13,685 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-10 00:56:13,685 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-10 00:56:13,685 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-10 00:56:13,685 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-10 00:56:13,685 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-10 00:56:13,685 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-01-10 00:56:13,685 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-01-10 00:56:13,685 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-01-10 00:56:13,686 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-10 00:56:13,686 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-01-10 00:56:13,686 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-01-10 00:56:13,686 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-01-10 00:56:13,686 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-10 00:56:13,686 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-10 00:56:13,686 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-10 00:56:13,686 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-10 00:56:13,686 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-10 00:56:13,686 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 00:56:13,687 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 00:56:13,687 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 00:56:13,687 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 00:56:13,687 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-10 00:56:13,687 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 00:56:13,687 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 00:56:13,687 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 00:56:13,687 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 00:56:13,687 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-10 00:56:13,687 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-10 00:56:13,687 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-01-10 00:56:13,687 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-01-10 00:56:13,688 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-10 00:56:13,688 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-10 00:56:13,688 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-10 00:56:13,688 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-10 00:56:13,688 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-jdk21/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 -> 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a [2025-01-10 00:56:13,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-10 00:56:13,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-10 00:56:13,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-10 00:56:13,891 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-10 00:56:13,892 INFO L274 PluginConnector]: CDTParser initialized [2025-01-10 00:56:13,892 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2025-01-10 00:56:15,069 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/89c061c9d/2f15d931daff4168bc16c270de5bda42/FLAG5e0afbdbf [2025-01-10 00:56:15,337 INFO L384 CDTParser]: Found 1 translation units. [2025-01-10 00:56:15,339 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2025-01-10 00:56:15,353 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/89c061c9d/2f15d931daff4168bc16c270de5bda42/FLAG5e0afbdbf [2025-01-10 00:56:15,637 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/89c061c9d/2f15d931daff4168bc16c270de5bda42 [2025-01-10 00:56:15,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-10 00:56:15,639 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-10 00:56:15,640 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-10 00:56:15,640 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-10 00:56:15,643 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-10 00:56:15,643 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:56:15" (1/1) ... [2025-01-10 00:56:15,644 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d54ca24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:15, skipping insertion in model container [2025-01-10 00:56:15,644 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 12:56:15" (1/1) ... [2025-01-10 00:56:15,671 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 00:56:15,949 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:15,950 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:15,951 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:15,952 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:15,976 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 00:56:16,001 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-01-10 00:56:16,007 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 00:56:16,030 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:16,031 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:16,031 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:16,031 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:16,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 00:56:16,053 INFO L200 MainTranslator]: Completed pre-run [2025-01-10 00:56:16,084 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:16,084 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:16,085 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:16,085 WARN L1731 CHandler]: Possible shadowing of function new [2025-01-10 00:56:16,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 00:56:16,141 INFO L204 MainTranslator]: Completed translation [2025-01-10 00:56:16,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:16 WrapperNode [2025-01-10 00:56:16,142 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-10 00:56:16,143 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-10 00:56:16,143 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-10 00:56:16,143 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-10 00:56:16,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:16" (1/1) ... [2025-01-10 00:56:16,175 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:16" (1/1) ... [2025-01-10 00:56:16,206 INFO L138 Inliner]: procedures = 276, calls = 101, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 206 [2025-01-10 00:56:16,206 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-10 00:56:16,211 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-10 00:56:16,211 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-10 00:56:16,211 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-10 00:56:16,217 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:16" (1/1) ... [2025-01-10 00:56:16,218 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:16" (1/1) ... [2025-01-10 00:56:16,224 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:16" (1/1) ... [2025-01-10 00:56:16,252 INFO L175 MemorySlicer]: Split 86 memory accesses to 1 slices as follows [86]. 100 percent of accesses are in the largest equivalence class. The 70 initializations are split as follows [70]. The 10 writes are split as follows [10]. [2025-01-10 00:56:16,252 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:16" (1/1) ... [2025-01-10 00:56:16,253 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:16" (1/1) ... [2025-01-10 00:56:16,267 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:16" (1/1) ... [2025-01-10 00:56:16,271 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:16" (1/1) ... [2025-01-10 00:56:16,273 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:16" (1/1) ... [2025-01-10 00:56:16,278 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:16" (1/1) ... [2025-01-10 00:56:16,279 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:16" (1/1) ... [2025-01-10 00:56:16,285 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-10 00:56:16,288 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-10 00:56:16,288 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-10 00:56:16,288 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-10 00:56:16,289 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:16" (1/1) ... [2025-01-10 00:56:16,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 00:56:16,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:16,317 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-10 00:56:16,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-10 00:56:16,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-01-10 00:56:16,341 INFO L130 BoogieDeclarations]: Found specification of procedure f [2025-01-10 00:56:16,341 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2025-01-10 00:56:16,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-01-10 00:56:16,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-01-10 00:56:16,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-01-10 00:56:16,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4#0 [2025-01-10 00:56:16,342 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-01-10 00:56:16,343 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-01-10 00:56:16,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-01-10 00:56:16,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-10 00:56:16,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-01-10 00:56:16,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-10 00:56:16,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-10 00:56:16,344 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-01-10 00:56:16,487 INFO L234 CfgBuilder]: Building ICFG [2025-01-10 00:56:16,488 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-10 00:56:16,921 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-01-10 00:56:16,922 INFO L283 CfgBuilder]: Performing block encoding [2025-01-10 00:56:18,011 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-10 00:56:18,011 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-10 00:56:18,011 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:56:18 BoogieIcfgContainer [2025-01-10 00:56:18,012 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-10 00:56:18,013 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-10 00:56:18,013 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-10 00:56:18,017 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-10 00:56:18,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 12:56:15" (1/3) ... [2025-01-10 00:56:18,018 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78abddd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:56:18, skipping insertion in model container [2025-01-10 00:56:18,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 12:56:16" (2/3) ... [2025-01-10 00:56:18,018 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78abddd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 12:56:18, skipping insertion in model container [2025-01-10 00:56:18,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 12:56:18" (3/3) ... [2025-01-10 00:56:18,019 INFO L128 eAbstractionObserver]: Analyzing ICFG 09-regions_24-evilcollapse_nr.i [2025-01-10 00:56:18,030 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-10 00:56:18,031 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 09-regions_24-evilcollapse_nr.i that has 2 procedures, 68 locations, 1 initial locations, 4 loop locations, and 33 error locations. [2025-01-10 00:56:18,031 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-01-10 00:56:18,099 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-01-10 00:56:18,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 94 transitions, 196 flow [2025-01-10 00:56:18,156 INFO L124 PetriNetUnfolderBase]: 7/92 cut-off events. [2025-01-10 00:56:18,157 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-10 00:56:18,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 92 events. 7/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 323 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2025-01-10 00:56:18,160 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 94 transitions, 196 flow [2025-01-10 00:56:18,162 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 92 transitions, 190 flow [2025-01-10 00:56:18,167 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-10 00:56:18,174 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;@72b35ce0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-10 00:56:18,175 INFO L334 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2025-01-10 00:56:18,183 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-01-10 00:56:18,183 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2025-01-10 00:56:18,183 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-01-10 00:56:18,183 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:18,184 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 00:56:18,184 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-01-10 00:56:18,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash 591522, now seen corresponding path program 1 times [2025-01-10 00:56:18,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:18,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894241393] [2025-01-10 00:56:18,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:18,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:18,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:18,200 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:18,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-10 00:56:18,278 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 00:56:18,399 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 00:56:18,400 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:18,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:18,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-10 00:56:18,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:18,471 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:18,471 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:18,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894241393] [2025-01-10 00:56:18,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894241393] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:18,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:18,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 00:56:18,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092209991] [2025-01-10 00:56:18,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:18,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 00:56:18,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:18,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 00:56:18,494 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 00:56:18,600 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 94 [2025-01-10 00:56:18,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 92 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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) [2025-01-10 00:56:18,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:18,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 94 [2025-01-10 00:56:18,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:18,897 INFO L124 PetriNetUnfolderBase]: 390/852 cut-off events. [2025-01-10 00:56:18,897 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-01-10 00:56:18,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1486 conditions, 852 events. 390/852 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4824 event pairs, 287 based on Foata normal form. 1/732 useless extension candidates. Maximal degree in co-relation 1421. Up to 611 conditions per place. [2025-01-10 00:56:18,909 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 37 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2025-01-10 00:56:18,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 258 flow [2025-01-10 00:56:18,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:56:18,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:56:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 238 transitions. [2025-01-10 00:56:18,920 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6329787234042553 [2025-01-10 00:56:18,921 INFO L175 Difference]: Start difference. First operand has 92 places, 92 transitions, 190 flow. Second operand 4 states and 238 transitions. [2025-01-10 00:56:18,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 258 flow [2025-01-10 00:56:18,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 86 transitions, 256 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 00:56:18,930 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 182 flow [2025-01-10 00:56:18,932 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2025-01-10 00:56:18,935 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -5 predicate places. [2025-01-10 00:56:18,936 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 182 flow [2025-01-10 00:56:18,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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) [2025-01-10 00:56:18,936 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:18,936 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-01-10 00:56:18,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-10 00:56:19,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:19,140 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-01-10 00:56:19,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:19,142 INFO L85 PathProgramCache]: Analyzing trace with hash 591523, now seen corresponding path program 1 times [2025-01-10 00:56:19,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:19,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597441538] [2025-01-10 00:56:19,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:19,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:19,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:19,146 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:19,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-10 00:56:19,224 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-01-10 00:56:19,358 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-01-10 00:56:19,358 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:19,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:19,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-10 00:56:19,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:19,433 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:19,433 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:19,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597441538] [2025-01-10 00:56:19,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597441538] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:19,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:19,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 00:56:19,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25965787] [2025-01-10 00:56:19,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:19,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 00:56:19,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:19,436 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 00:56:19,436 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 00:56:19,623 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 94 [2025-01-10 00:56:19,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 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) [2025-01-10 00:56:19,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:19,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 94 [2025-01-10 00:56:19,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:19,940 INFO L124 PetriNetUnfolderBase]: 391/857 cut-off events. [2025-01-10 00:56:19,940 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-10 00:56:19,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1501 conditions, 857 events. 391/857 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4779 event pairs, 287 based on Foata normal form. 3/740 useless extension candidates. Maximal degree in co-relation 1473. Up to 616 conditions per place. [2025-01-10 00:56:19,944 INFO L140 encePairwiseOnDemand]: 86/94 looper letters, 41 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2025-01-10 00:56:19,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 286 flow [2025-01-10 00:56:19,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:56:19,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:56:19,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 257 transitions. [2025-01-10 00:56:19,946 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6835106382978723 [2025-01-10 00:56:19,946 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 182 flow. Second operand 4 states and 257 transitions. [2025-01-10 00:56:19,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 286 flow [2025-01-10 00:56:19,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 90 transitions, 276 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 00:56:19,949 INFO L231 Difference]: Finished difference. Result has 89 places, 90 transitions, 215 flow [2025-01-10 00:56:19,949 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=215, PETRI_PLACES=89, PETRI_TRANSITIONS=90} [2025-01-10 00:56:19,949 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2025-01-10 00:56:19,949 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 90 transitions, 215 flow [2025-01-10 00:56:19,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.75) internal successors, (211), 4 states have internal predecessors, (211), 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) [2025-01-10 00:56:19,950 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:19,950 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-01-10 00:56:19,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-10 00:56:20,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:20,155 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-01-10 00:56:20,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:20,158 INFO L85 PathProgramCache]: Analyzing trace with hash 442709587, now seen corresponding path program 1 times [2025-01-10 00:56:20,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:20,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923688089] [2025-01-10 00:56:20,158 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:20,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:20,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:20,163 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:20,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-10 00:56:20,226 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-10 00:56:20,330 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-10 00:56:20,331 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:20,331 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:20,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-01-10 00:56:20,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:20,364 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 [2025-01-10 00:56:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:20,370 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:20,370 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:20,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923688089] [2025-01-10 00:56:20,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923688089] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:20,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:20,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 00:56:20,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705325598] [2025-01-10 00:56:20,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:20,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 00:56:20,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:20,371 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 00:56:20,371 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 00:56:20,425 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 94 [2025-01-10 00:56:20,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 90 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2025-01-10 00:56:20,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:20,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 94 [2025-01-10 00:56:20,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:20,657 INFO L124 PetriNetUnfolderBase]: 391/856 cut-off events. [2025-01-10 00:56:20,657 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-01-10 00:56:20,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1509 conditions, 856 events. 391/856 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4752 event pairs, 287 based on Foata normal form. 0/735 useless extension candidates. Maximal degree in co-relation 1479. Up to 612 conditions per place. [2025-01-10 00:56:20,663 INFO L140 encePairwiseOnDemand]: 91/94 looper letters, 39 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2025-01-10 00:56:20,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 89 transitions, 297 flow [2025-01-10 00:56:20,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 00:56:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 00:56:20,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 204 transitions. [2025-01-10 00:56:20,666 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.723404255319149 [2025-01-10 00:56:20,666 INFO L175 Difference]: Start difference. First operand has 89 places, 90 transitions, 215 flow. Second operand 3 states and 204 transitions. [2025-01-10 00:56:20,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 89 transitions, 297 flow [2025-01-10 00:56:20,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 00:56:20,670 INFO L231 Difference]: Finished difference. Result has 89 places, 89 transitions, 216 flow [2025-01-10 00:56:20,670 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=89, PETRI_TRANSITIONS=89} [2025-01-10 00:56:20,670 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2025-01-10 00:56:20,670 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 89 transitions, 216 flow [2025-01-10 00:56:20,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2025-01-10 00:56:20,671 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:20,671 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-01-10 00:56:20,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-10 00:56:20,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:20,875 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-01-10 00:56:20,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:20,875 INFO L85 PathProgramCache]: Analyzing trace with hash 442709588, now seen corresponding path program 1 times [2025-01-10 00:56:20,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:20,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339218390] [2025-01-10 00:56:20,876 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:20,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:20,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:20,878 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:20,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-10 00:56:20,943 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-01-10 00:56:21,054 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-01-10 00:56:21,054 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:21,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:21,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-10 00:56:21,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:21,074 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 [2025-01-10 00:56:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:21,081 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:21,081 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:21,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339218390] [2025-01-10 00:56:21,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339218390] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:21,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:21,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 00:56:21,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321625692] [2025-01-10 00:56:21,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:21,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 00:56:21,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:21,082 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 00:56:21,082 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 00:56:21,163 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 94 [2025-01-10 00:56:21,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2025-01-10 00:56:21,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:21,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 94 [2025-01-10 00:56:21,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:21,344 INFO L124 PetriNetUnfolderBase]: 391/855 cut-off events. [2025-01-10 00:56:21,345 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-10 00:56:21,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1509 conditions, 855 events. 391/855 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4777 event pairs, 287 based on Foata normal form. 0/736 useless extension candidates. Maximal degree in co-relation 1478. Up to 612 conditions per place. [2025-01-10 00:56:21,349 INFO L140 encePairwiseOnDemand]: 91/94 looper letters, 39 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2025-01-10 00:56:21,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 88 transitions, 298 flow [2025-01-10 00:56:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 00:56:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 00:56:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 204 transitions. [2025-01-10 00:56:21,351 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.723404255319149 [2025-01-10 00:56:21,351 INFO L175 Difference]: Start difference. First operand has 89 places, 89 transitions, 216 flow. Second operand 3 states and 204 transitions. [2025-01-10 00:56:21,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 88 transitions, 298 flow [2025-01-10 00:56:21,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 88 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 00:56:21,354 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 214 flow [2025-01-10 00:56:21,357 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2025-01-10 00:56:21,357 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -4 predicate places. [2025-01-10 00:56:21,357 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 214 flow [2025-01-10 00:56:21,357 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 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) [2025-01-10 00:56:21,357 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:21,357 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:21,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-01-10 00:56:21,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:21,558 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-01-10 00:56:21,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:21,559 INFO L85 PathProgramCache]: Analyzing trace with hash 839095909, now seen corresponding path program 1 times [2025-01-10 00:56:21,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:21,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937799936] [2025-01-10 00:56:21,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:21,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:21,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:21,561 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:21,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-10 00:56:21,645 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-10 00:56:21,752 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-10 00:56:21,752 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:21,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:21,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-10 00:56:21,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:21,781 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:21,781 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:21,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937799936] [2025-01-10 00:56:21,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937799936] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:21,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:21,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 00:56:21,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672476239] [2025-01-10 00:56:21,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:21,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 00:56:21,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:21,782 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 00:56:21,783 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 00:56:21,840 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 94 [2025-01-10 00:56:21,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 00:56:21,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:21,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 94 [2025-01-10 00:56:21,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:22,046 INFO L124 PetriNetUnfolderBase]: 391/853 cut-off events. [2025-01-10 00:56:22,046 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-01-10 00:56:22,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1510 conditions, 853 events. 391/853 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4731 event pairs, 287 based on Foata normal form. 1/738 useless extension candidates. Maximal degree in co-relation 1478. Up to 614 conditions per place. [2025-01-10 00:56:22,049 INFO L140 encePairwiseOnDemand]: 88/94 looper letters, 39 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2025-01-10 00:56:22,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 298 flow [2025-01-10 00:56:22,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 00:56:22,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 00:56:22,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2025-01-10 00:56:22,051 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6808510638297872 [2025-01-10 00:56:22,051 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 214 flow. Second operand 3 states and 192 transitions. [2025-01-10 00:56:22,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 298 flow [2025-01-10 00:56:22,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 86 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 00:56:22,053 INFO L231 Difference]: Finished difference. Result has 86 places, 86 transitions, 214 flow [2025-01-10 00:56:22,053 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=86, PETRI_TRANSITIONS=86} [2025-01-10 00:56:22,053 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -6 predicate places. [2025-01-10 00:56:22,053 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 86 transitions, 214 flow [2025-01-10 00:56:22,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 00:56:22,054 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:22,054 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:22,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-01-10 00:56:22,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:22,254 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-01-10 00:56:22,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:22,255 INFO L85 PathProgramCache]: Analyzing trace with hash 839095910, now seen corresponding path program 1 times [2025-01-10 00:56:22,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:22,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1433154969] [2025-01-10 00:56:22,255 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:22,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:22,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:22,258 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:22,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-10 00:56:22,326 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-10 00:56:22,455 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-10 00:56:22,456 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:22,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:22,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 00:56:22,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:22,488 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 [2025-01-10 00:56:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:22,506 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:22,506 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:22,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433154969] [2025-01-10 00:56:22,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433154969] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:22,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:22,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 00:56:22,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658604799] [2025-01-10 00:56:22,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:22,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 00:56:22,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:22,507 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 00:56:22,507 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 00:56:22,685 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 94 [2025-01-10 00:56:22,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 86 transitions, 214 flow. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 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) [2025-01-10 00:56:22,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:22,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 94 [2025-01-10 00:56:22,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:22,882 INFO L124 PetriNetUnfolderBase]: 391/851 cut-off events. [2025-01-10 00:56:22,882 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-01-10 00:56:22,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1510 conditions, 851 events. 391/851 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4716 event pairs, 287 based on Foata normal form. 2/735 useless extension candidates. Maximal degree in co-relation 1475. Up to 614 conditions per place. [2025-01-10 00:56:22,886 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 40 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2025-01-10 00:56:22,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 84 transitions, 298 flow [2025-01-10 00:56:22,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:56:22,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:56:22,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 246 transitions. [2025-01-10 00:56:22,887 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6542553191489362 [2025-01-10 00:56:22,887 INFO L175 Difference]: Start difference. First operand has 86 places, 86 transitions, 214 flow. Second operand 4 states and 246 transitions. [2025-01-10 00:56:22,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 84 transitions, 298 flow [2025-01-10 00:56:22,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 84 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 00:56:22,889 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 208 flow [2025-01-10 00:56:22,889 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2025-01-10 00:56:22,889 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -7 predicate places. [2025-01-10 00:56:22,889 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 208 flow [2025-01-10 00:56:22,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 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) [2025-01-10 00:56:22,890 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:22,890 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-01-10 00:56:22,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-10 00:56:23,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:23,091 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-01-10 00:56:23,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:23,091 INFO L85 PathProgramCache]: Analyzing trace with hash 839095879, now seen corresponding path program 1 times [2025-01-10 00:56:23,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:23,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641185036] [2025-01-10 00:56:23,091 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:23,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:23,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:23,094 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:23,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-10 00:56:23,148 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-10 00:56:23,258 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-10 00:56:23,258 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:23,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:23,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-01-10 00:56:23,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:23,278 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:23,278 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:23,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641185036] [2025-01-10 00:56:23,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641185036] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:23,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:23,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 00:56:23,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128357019] [2025-01-10 00:56:23,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:23,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 00:56:23,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:23,279 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 00:56:23,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 00:56:23,279 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 94 [2025-01-10 00:56:23,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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) [2025-01-10 00:56:23,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:23,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 94 [2025-01-10 00:56:23,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:23,506 INFO L124 PetriNetUnfolderBase]: 390/869 cut-off events. [2025-01-10 00:56:23,507 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-01-10 00:56:23,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1531 conditions, 869 events. 390/869 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4765 event pairs, 287 based on Foata normal form. 2/747 useless extension candidates. Maximal degree in co-relation 1503. Up to 612 conditions per place. [2025-01-10 00:56:23,510 INFO L140 encePairwiseOnDemand]: 91/94 looper letters, 43 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2025-01-10 00:56:23,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 88 transitions, 314 flow [2025-01-10 00:56:23,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 00:56:23,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-01-10 00:56:23,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2025-01-10 00:56:23,511 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.75177304964539 [2025-01-10 00:56:23,511 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 208 flow. Second operand 3 states and 212 transitions. [2025-01-10 00:56:23,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 88 transitions, 314 flow [2025-01-10 00:56:23,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 88 transitions, 300 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 00:56:23,513 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 211 flow [2025-01-10 00:56:23,513 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2025-01-10 00:56:23,513 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -7 predicate places. [2025-01-10 00:56:23,513 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 211 flow [2025-01-10 00:56:23,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 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) [2025-01-10 00:56:23,513 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:23,513 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:23,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-10 00:56:23,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:23,714 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-01-10 00:56:23,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:23,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1082666705, now seen corresponding path program 1 times [2025-01-10 00:56:23,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:23,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555938226] [2025-01-10 00:56:23,715 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:23,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:23,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:23,717 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:23,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-10 00:56:23,774 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-10 00:56:23,904 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-10 00:56:23,905 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:23,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:23,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-10 00:56:23,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:23,982 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-01-10 00:56:23,982 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 [2025-01-10 00:56:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:24,025 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:24,025 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:24,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555938226] [2025-01-10 00:56:24,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555938226] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:24,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:24,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 00:56:24,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563364493] [2025-01-10 00:56:24,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:24,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 00:56:24,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:24,026 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 00:56:24,026 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 00:56:24,118 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 94 [2025-01-10 00:56:24,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 211 flow. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2025-01-10 00:56:24,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:24,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 94 [2025-01-10 00:56:24,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:24,337 INFO L124 PetriNetUnfolderBase]: 390/865 cut-off events. [2025-01-10 00:56:24,337 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-01-10 00:56:24,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1527 conditions, 865 events. 390/865 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4719 event pairs, 287 based on Foata normal form. 2/747 useless extension candidates. Maximal degree in co-relation 1497. Up to 614 conditions per place. [2025-01-10 00:56:24,340 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 38 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2025-01-10 00:56:24,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 82 transitions, 291 flow [2025-01-10 00:56:24,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:56:24,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:56:24,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 240 transitions. [2025-01-10 00:56:24,342 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2025-01-10 00:56:24,342 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 211 flow. Second operand 4 states and 240 transitions. [2025-01-10 00:56:24,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 82 transitions, 291 flow [2025-01-10 00:56:24,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 82 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 00:56:24,343 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 212 flow [2025-01-10 00:56:24,343 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2025-01-10 00:56:24,344 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -7 predicate places. [2025-01-10 00:56:24,344 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 212 flow [2025-01-10 00:56:24,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 4 states have internal predecessors, (207), 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) [2025-01-10 00:56:24,344 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:24,344 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:24,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-10 00:56:24,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:24,545 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-01-10 00:56:24,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:24,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1082666704, now seen corresponding path program 1 times [2025-01-10 00:56:24,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:24,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154442304] [2025-01-10 00:56:24,546 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:24,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:24,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:24,548 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:24,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-10 00:56:24,605 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-10 00:56:24,735 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-10 00:56:24,735 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:24,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:24,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-10 00:56:24,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:24,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-01-10 00:56:24,828 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 [2025-01-10 00:56:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:24,877 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:24,877 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:24,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154442304] [2025-01-10 00:56:24,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154442304] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:24,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:24,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 00:56:24,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787338378] [2025-01-10 00:56:24,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:24,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 00:56:24,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:24,878 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 00:56:24,878 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 00:56:25,111 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 94 [2025-01-10 00:56:25,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 51.4) internal successors, (257), 5 states have internal predecessors, (257), 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) [2025-01-10 00:56:25,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:25,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 94 [2025-01-10 00:56:25,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:25,408 INFO L124 PetriNetUnfolderBase]: 391/895 cut-off events. [2025-01-10 00:56:25,408 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2025-01-10 00:56:25,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1584 conditions, 895 events. 391/895 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5063 event pairs, 287 based on Foata normal form. 2/763 useless extension candidates. Maximal degree in co-relation 1496. Up to 620 conditions per place. [2025-01-10 00:56:25,416 INFO L140 encePairwiseOnDemand]: 88/94 looper letters, 46 selfloop transitions, 5 changer transitions 0/89 dead transitions. [2025-01-10 00:56:25,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 89 transitions, 344 flow [2025-01-10 00:56:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:56:25,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:56:25,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 250 transitions. [2025-01-10 00:56:25,422 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6648936170212766 [2025-01-10 00:56:25,422 INFO L175 Difference]: Start difference. First operand has 85 places, 82 transitions, 212 flow. Second operand 4 states and 250 transitions. [2025-01-10 00:56:25,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 89 transitions, 344 flow [2025-01-10 00:56:25,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 89 transitions, 330 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 00:56:25,424 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 250 flow [2025-01-10 00:56:25,424 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=250, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2025-01-10 00:56:25,425 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, -5 predicate places. [2025-01-10 00:56:25,425 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 250 flow [2025-01-10 00:56:25,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.4) internal successors, (257), 5 states have internal predecessors, (257), 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) [2025-01-10 00:56:25,425 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:25,425 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:25,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-10 00:56:25,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:25,626 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-01-10 00:56:25,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:25,626 INFO L85 PathProgramCache]: Analyzing trace with hash 797071179, now seen corresponding path program 1 times [2025-01-10 00:56:25,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:25,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340517426] [2025-01-10 00:56:25,627 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:25,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:25,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:25,629 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:25,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-10 00:56:25,690 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-10 00:56:25,830 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-10 00:56:25,830 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:25,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:25,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-01-10 00:56:25,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:25,931 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 [2025-01-10 00:56:25,939 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 [2025-01-10 00:56:25,979 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 [2025-01-10 00:56:26,013 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 [2025-01-10 00:56:26,091 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-01-10 00:56:26,092 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 [2025-01-10 00:56:26,115 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-01-10 00:56:26,116 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 [2025-01-10 00:56:26,187 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 [2025-01-10 00:56:26,203 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 [2025-01-10 00:56:26,262 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 [2025-01-10 00:56:26,272 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 [2025-01-10 00:56:26,318 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 [2025-01-10 00:56:26,327 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 [2025-01-10 00:56:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:26,391 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:26,391 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:26,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340517426] [2025-01-10 00:56:26,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340517426] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:26,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:26,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-10 00:56:26,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551266596] [2025-01-10 00:56:26,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:26,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-10 00:56:26,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:26,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-10 00:56:26,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-01-10 00:56:27,339 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 94 [2025-01-10 00:56:27,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 250 flow. Second operand has 10 states, 10 states have (on average 36.0) internal successors, (360), 10 states have internal predecessors, (360), 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) [2025-01-10 00:56:27,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:27,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 94 [2025-01-10 00:56:27,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:28,041 INFO L124 PetriNetUnfolderBase]: 391/894 cut-off events. [2025-01-10 00:56:28,042 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-01-10 00:56:28,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1619 conditions, 894 events. 391/894 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5067 event pairs, 287 based on Foata normal form. 0/775 useless extension candidates. Maximal degree in co-relation 1530. Up to 633 conditions per place. [2025-01-10 00:56:28,046 INFO L140 encePairwiseOnDemand]: 82/94 looper letters, 61 selfloop transitions, 11 changer transitions 0/102 dead transitions. [2025-01-10 00:56:28,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 102 transitions, 432 flow [2025-01-10 00:56:28,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 00:56:28,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-10 00:56:28,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 457 transitions. [2025-01-10 00:56:28,049 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44197292069632493 [2025-01-10 00:56:28,049 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 250 flow. Second operand 11 states and 457 transitions. [2025-01-10 00:56:28,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 102 transitions, 432 flow [2025-01-10 00:56:28,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 102 transitions, 430 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-01-10 00:56:28,051 INFO L231 Difference]: Finished difference. Result has 101 places, 91 transitions, 306 flow [2025-01-10 00:56:28,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=306, PETRI_PLACES=101, PETRI_TRANSITIONS=91} [2025-01-10 00:56:28,051 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 9 predicate places. [2025-01-10 00:56:28,051 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 91 transitions, 306 flow [2025-01-10 00:56:28,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 36.0) internal successors, (360), 10 states have internal predecessors, (360), 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) [2025-01-10 00:56:28,052 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:28,052 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:28,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-01-10 00:56:28,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:28,252 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-01-10 00:56:28,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:28,253 INFO L85 PathProgramCache]: Analyzing trace with hash 797071178, now seen corresponding path program 1 times [2025-01-10 00:56:28,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:28,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277489838] [2025-01-10 00:56:28,253 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:28,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:28,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:28,256 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:28,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-10 00:56:28,320 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-10 00:56:28,453 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-10 00:56:28,453 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:28,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:28,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-01-10 00:56:28,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:28,532 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 [2025-01-10 00:56:28,553 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 [2025-01-10 00:56:28,588 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-01-10 00:56:28,588 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 [2025-01-10 00:56:28,622 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 [2025-01-10 00:56:28,673 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 [2025-01-10 00:56:28,692 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 [2025-01-10 00:56:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:28,752 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:28,752 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:28,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277489838] [2025-01-10 00:56:28,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277489838] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:28,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:28,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-01-10 00:56:28,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426067269] [2025-01-10 00:56:28,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:28,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-01-10 00:56:28,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:28,752 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-01-10 00:56:28,752 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-01-10 00:56:29,733 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 94 [2025-01-10 00:56:29,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 91 transitions, 306 flow. Second operand has 10 states, 10 states have (on average 38.0) internal successors, (380), 10 states have internal predecessors, (380), 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) [2025-01-10 00:56:29,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:29,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 94 [2025-01-10 00:56:29,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:30,406 INFO L124 PetriNetUnfolderBase]: 391/893 cut-off events. [2025-01-10 00:56:30,406 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2025-01-10 00:56:30,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1648 conditions, 893 events. 391/893 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5064 event pairs, 287 based on Foata normal form. 1/778 useless extension candidates. Maximal degree in co-relation 1571. Up to 629 conditions per place. [2025-01-10 00:56:30,410 INFO L140 encePairwiseOnDemand]: 82/94 looper letters, 59 selfloop transitions, 11 changer transitions 0/102 dead transitions. [2025-01-10 00:56:30,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 102 transitions, 476 flow [2025-01-10 00:56:30,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 00:56:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-01-10 00:56:30,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 477 transitions. [2025-01-10 00:56:30,413 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46131528046421666 [2025-01-10 00:56:30,413 INFO L175 Difference]: Start difference. First operand has 101 places, 91 transitions, 306 flow. Second operand 11 states and 477 transitions. [2025-01-10 00:56:30,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 102 transitions, 476 flow [2025-01-10 00:56:30,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 102 transitions, 472 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-01-10 00:56:30,415 INFO L231 Difference]: Finished difference. Result has 110 places, 91 transitions, 328 flow [2025-01-10 00:56:30,415 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=328, PETRI_PLACES=110, PETRI_TRANSITIONS=91} [2025-01-10 00:56:30,415 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 18 predicate places. [2025-01-10 00:56:30,415 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 91 transitions, 328 flow [2025-01-10 00:56:30,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 38.0) internal successors, (380), 10 states have internal predecessors, (380), 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) [2025-01-10 00:56:30,416 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:30,416 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:30,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-01-10 00:56:30,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:30,620 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-01-10 00:56:30,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:30,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1060596692, now seen corresponding path program 1 times [2025-01-10 00:56:30,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:30,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981510546] [2025-01-10 00:56:30,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:30,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:30,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:30,624 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:30,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-01-10 00:56:30,687 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-10 00:56:30,805 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 00:56:30,805 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:30,805 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:30,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-01-10 00:56:30,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:30,825 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 [2025-01-10 00:56:30,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:30,838 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:30,838 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:30,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981510546] [2025-01-10 00:56:30,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981510546] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:30,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:30,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 00:56:30,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27267689] [2025-01-10 00:56:30,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:30,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 00:56:30,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:30,839 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 00:56:30,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 00:56:30,924 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 94 [2025-01-10 00:56:30,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 91 transitions, 328 flow. Second operand has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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) [2025-01-10 00:56:30,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:30,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 94 [2025-01-10 00:56:30,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:31,117 INFO L124 PetriNetUnfolderBase]: 391/885 cut-off events. [2025-01-10 00:56:31,118 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2025-01-10 00:56:31,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1639 conditions, 885 events. 391/885 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5008 event pairs, 287 based on Foata normal form. 0/774 useless extension candidates. Maximal degree in co-relation 1569. Up to 613 conditions per place. [2025-01-10 00:56:31,122 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 42 selfloop transitions, 9 changer transitions 0/89 dead transitions. [2025-01-10 00:56:31,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 89 transitions, 426 flow [2025-01-10 00:56:31,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:56:31,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:56:31,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 246 transitions. [2025-01-10 00:56:31,123 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6542553191489362 [2025-01-10 00:56:31,123 INFO L175 Difference]: Start difference. First operand has 110 places, 91 transitions, 328 flow. Second operand 4 states and 246 transitions. [2025-01-10 00:56:31,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 89 transitions, 426 flow [2025-01-10 00:56:31,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 89 transitions, 404 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-01-10 00:56:31,125 INFO L231 Difference]: Finished difference. Result has 101 places, 89 transitions, 320 flow [2025-01-10 00:56:31,125 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=101, PETRI_TRANSITIONS=89} [2025-01-10 00:56:31,126 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 9 predicate places. [2025-01-10 00:56:31,126 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 89 transitions, 320 flow [2025-01-10 00:56:31,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 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) [2025-01-10 00:56:31,126 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:31,126 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:31,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-01-10 00:56:31,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:31,327 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-01-10 00:56:31,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:31,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1060596691, now seen corresponding path program 1 times [2025-01-10 00:56:31,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:31,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410289471] [2025-01-10 00:56:31,328 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:31,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:31,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:31,330 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:31,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-01-10 00:56:31,399 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-01-10 00:56:31,539 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-01-10 00:56:31,539 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:31,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:31,560 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-10 00:56:31,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:31,565 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 [2025-01-10 00:56:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:31,595 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 00:56:31,595 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:31,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410289471] [2025-01-10 00:56:31,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410289471] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 00:56:31,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 00:56:31,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-01-10 00:56:31,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639015367] [2025-01-10 00:56:31,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 00:56:31,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-01-10 00:56:31,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:31,596 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-01-10 00:56:31,596 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-01-10 00:56:31,759 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 94 [2025-01-10 00:56:31,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 89 transitions, 320 flow. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2025-01-10 00:56:31,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:31,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 94 [2025-01-10 00:56:31,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:32,003 INFO L124 PetriNetUnfolderBase]: 391/877 cut-off events. [2025-01-10 00:56:32,004 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2025-01-10 00:56:32,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1624 conditions, 877 events. 391/877 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4943 event pairs, 287 based on Foata normal form. 8/774 useless extension candidates. Maximal degree in co-relation 1561. Up to 613 conditions per place. [2025-01-10 00:56:32,007 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 40 selfloop transitions, 9 changer transitions 0/87 dead transitions. [2025-01-10 00:56:32,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 87 transitions, 414 flow [2025-01-10 00:56:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-01-10 00:56:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-01-10 00:56:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 252 transitions. [2025-01-10 00:56:32,009 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6702127659574468 [2025-01-10 00:56:32,009 INFO L175 Difference]: Start difference. First operand has 101 places, 89 transitions, 320 flow. Second operand 4 states and 252 transitions. [2025-01-10 00:56:32,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 87 transitions, 414 flow [2025-01-10 00:56:32,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 87 transitions, 396 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 00:56:32,012 INFO L231 Difference]: Finished difference. Result has 99 places, 87 transitions, 316 flow [2025-01-10 00:56:32,012 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=316, PETRI_PLACES=99, PETRI_TRANSITIONS=87} [2025-01-10 00:56:32,012 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 7 predicate places. [2025-01-10 00:56:32,012 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 87 transitions, 316 flow [2025-01-10 00:56:32,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 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) [2025-01-10 00:56:32,013 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:32,013 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:32,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-01-10 00:56:32,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:32,213 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-01-10 00:56:32,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:32,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1944415925, now seen corresponding path program 1 times [2025-01-10 00:56:32,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:32,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619203778] [2025-01-10 00:56:32,214 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:32,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:32,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:32,216 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:32,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-01-10 00:56:32,350 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-01-10 00:56:32,485 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-01-10 00:56:32,485 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:32,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:32,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-01-10 00:56:32,505 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:32,524 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:56:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:32,549 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:56:32,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619203778] [2025-01-10 00:56:32,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619203778] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:56:32,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 00:56:32,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2025-01-10 00:56:32,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848068244] [2025-01-10 00:56:32,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 00:56:32,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 00:56:32,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:56:32,550 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 00:56:32,550 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-01-10 00:56:32,551 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 94 [2025-01-10 00:56:32,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 87 transitions, 316 flow. Second operand has 6 states, 6 states have (on average 58.833333333333336) internal successors, (353), 6 states have internal predecessors, (353), 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) [2025-01-10 00:56:32,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:56:32,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 94 [2025-01-10 00:56:32,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:56:32,848 INFO L124 PetriNetUnfolderBase]: 391/927 cut-off events. [2025-01-10 00:56:32,848 INFO L125 PetriNetUnfolderBase]: For 143/143 co-relation queries the response was YES. [2025-01-10 00:56:32,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1758 conditions, 927 events. 391/927 cut-off events. For 143/143 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4973 event pairs, 287 based on Foata normal form. 6/818 useless extension candidates. Maximal degree in co-relation 1687. Up to 609 conditions per place. [2025-01-10 00:56:32,853 INFO L140 encePairwiseOnDemand]: 90/94 looper letters, 57 selfloop transitions, 11 changer transitions 0/106 dead transitions. [2025-01-10 00:56:32,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 106 transitions, 574 flow [2025-01-10 00:56:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 00:56:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-01-10 00:56:32,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 393 transitions. [2025-01-10 00:56:32,857 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6968085106382979 [2025-01-10 00:56:32,857 INFO L175 Difference]: Start difference. First operand has 99 places, 87 transitions, 316 flow. Second operand 6 states and 393 transitions. [2025-01-10 00:56:32,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 106 transitions, 574 flow [2025-01-10 00:56:32,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 106 transitions, 530 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-01-10 00:56:32,859 INFO L231 Difference]: Finished difference. Result has 105 places, 92 transitions, 384 flow [2025-01-10 00:56:32,859 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=384, PETRI_PLACES=105, PETRI_TRANSITIONS=92} [2025-01-10 00:56:32,860 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 13 predicate places. [2025-01-10 00:56:32,861 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 92 transitions, 384 flow [2025-01-10 00:56:32,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 58.833333333333336) internal successors, (353), 6 states have internal predecessors, (353), 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) [2025-01-10 00:56:32,861 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:56:32,861 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:56:32,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-01-10 00:56:33,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:33,062 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-01-10 00:56:33,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:56:33,062 INFO L85 PathProgramCache]: Analyzing trace with hash -127696868, now seen corresponding path program 1 times [2025-01-10 00:56:33,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:56:33,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526374466] [2025-01-10 00:56:33,062 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:56:33,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:56:33,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:56:33,065 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:56:33,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-01-10 00:56:33,147 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-10 00:56:33,302 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 00:56:33,303 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:56:33,303 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:56:33,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-01-10 00:56:33,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:56:33,330 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 [2025-01-10 00:56:33,426 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 [2025-01-10 00:56:33,476 INFO L349 Elim1Store]: treesize reduction 90, result has 30.2 percent of original size [2025-01-10 00:56:33,476 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 36 treesize of output 52 [2025-01-10 00:56:33,513 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 [2025-01-10 00:56:33,550 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 [2025-01-10 00:56:33,570 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 [2025-01-10 00:56:33,633 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 [2025-01-10 00:56:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:56:33,681 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:56:34,371 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 00:56:34,371 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 [2025-01-10 00:56:34,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 00:56:34,387 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 [2025-01-10 00:56:34,394 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 [2025-01-10 00:57:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:57:03,665 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:57:03,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526374466] [2025-01-10 00:57:03,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526374466] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:57:03,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 00:57:03,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-01-10 00:57:03,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170799723] [2025-01-10 00:57:03,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 00:57:03,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-10 00:57:03,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:57:03,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-10 00:57:03,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=238, Unknown=20, NotChecked=0, Total=306 [2025-01-10 00:57:08,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2025-01-10 00:57:08,870 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 94 [2025-01-10 00:57:08,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 92 transitions, 384 flow. Second operand has 18 states, 18 states have (on average 13.88888888888889) internal successors, (250), 18 states have internal predecessors, (250), 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) [2025-01-10 00:57:08,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:57:08,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 94 [2025-01-10 00:57:08,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:57:15,032 INFO L124 PetriNetUnfolderBase]: 1519/2690 cut-off events. [2025-01-10 00:57:15,032 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2025-01-10 00:57:15,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5325 conditions, 2690 events. 1519/2690 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15283 event pairs, 1287 based on Foata normal form. 6/1905 useless extension candidates. Maximal degree in co-relation 5259. Up to 2347 conditions per place. [2025-01-10 00:57:15,044 INFO L140 encePairwiseOnDemand]: 86/94 looper letters, 68 selfloop transitions, 25 changer transitions 0/103 dead transitions. [2025-01-10 00:57:15,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 103 transitions, 610 flow [2025-01-10 00:57:15,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-10 00:57:15,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-01-10 00:57:15,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 221 transitions. [2025-01-10 00:57:15,047 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.19592198581560283 [2025-01-10 00:57:15,047 INFO L175 Difference]: Start difference. First operand has 105 places, 92 transitions, 384 flow. Second operand 12 states and 221 transitions. [2025-01-10 00:57:15,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 103 transitions, 610 flow [2025-01-10 00:57:15,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 103 transitions, 594 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-01-10 00:57:15,049 INFO L231 Difference]: Finished difference. Result has 117 places, 97 transitions, 449 flow [2025-01-10 00:57:15,050 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=449, PETRI_PLACES=117, PETRI_TRANSITIONS=97} [2025-01-10 00:57:15,050 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 25 predicate places. [2025-01-10 00:57:15,050 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 97 transitions, 449 flow [2025-01-10 00:57:15,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.88888888888889) internal successors, (250), 18 states have internal predecessors, (250), 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) [2025-01-10 00:57:15,050 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:57:15,050 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 00:57:15,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-01-10 00:57:15,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:57:15,251 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-01-10 00:57:15,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:57:15,251 INFO L85 PathProgramCache]: Analyzing trace with hash -127696867, now seen corresponding path program 1 times [2025-01-10 00:57:15,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:57:15,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897736972] [2025-01-10 00:57:15,251 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 00:57:15,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:57:15,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:57:15,254 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:57:15,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-01-10 00:57:15,359 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-01-10 00:57:15,519 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-01-10 00:57:15,519 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 00:57:15,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:57:15,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-01-10 00:57:15,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:57:15,548 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 [2025-01-10 00:57:15,551 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 [2025-01-10 00:57:15,729 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 [2025-01-10 00:57:15,736 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 [2025-01-10 00:57:15,807 INFO L349 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2025-01-10 00:57:15,807 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 [2025-01-10 00:57:15,820 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 [2025-01-10 00:57:15,853 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 [2025-01-10 00:57:15,863 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 [2025-01-10 00:57:15,905 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 [2025-01-10 00:57:15,917 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 [2025-01-10 00:57:15,939 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 [2025-01-10 00:57:15,949 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 [2025-01-10 00:57:16,002 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 [2025-01-10 00:57:16,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:57:16,054 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:57:16,204 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_680 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_680) |c_~#c~0.base|) .cse0) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_679) |c_~#c~0.base|) .cse0)))) (forall ((v_ArrVal_680 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_INIT_LIST_HEAD_~list#1.base| v_ArrVal_680) |c_~#c~0.base|) .cse0))) (bvule (bvadd .cse1 (_ bv4 32)) (bvadd .cse1 (_ bv8 32))))))) is different from false [2025-01-10 00:57:16,274 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|)))) (and (forall ((v_ArrVal_680 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_679 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_680) |c_~#c~0.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_679) |c_~#c~0.base|) .cse0)))) (forall ((v_ArrVal_680 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#0.offset| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_680) |c_~#c~0.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2025-01-10 00:57:16,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 00:57:16,562 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 [2025-01-10 00:57:16,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 00:57:16,569 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 [2025-01-10 00:57:16,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 00:57:16,591 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 [2025-01-10 00:57:16,614 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 00:57:16,614 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 [2025-01-10 00:57:16,624 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 [2025-01-10 00:57:16,629 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 [2025-01-10 00:57:17,102 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 00:57:17,102 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 [2025-01-10 00:57:17,118 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-01-10 00:57:17,119 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 [2025-01-10 00:57:17,125 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 [2025-01-10 00:57:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2025-01-10 00:57:20,914 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:57:20,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897736972] [2025-01-10 00:57:20,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897736972] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:57:20,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 00:57:20,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2025-01-10 00:57:20,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684412358] [2025-01-10 00:57:20,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 00:57:20,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-01-10 00:57:20,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:57:20,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-01-10 00:57:20,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=229, Unknown=4, NotChecked=62, Total=342 [2025-01-10 00:57:20,916 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 94 [2025-01-10 00:57:20,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 97 transitions, 449 flow. Second operand has 19 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 states have internal predecessors, (148), 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) [2025-01-10 00:57:20,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:57:20,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 94 [2025-01-10 00:57:20,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:57:26,808 INFO L124 PetriNetUnfolderBase]: 2200/3505 cut-off events. [2025-01-10 00:57:26,808 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2025-01-10 00:57:26,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7252 conditions, 3505 events. 2200/3505 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 18282 event pairs, 1920 based on Foata normal form. 6/2100 useless extension candidates. Maximal degree in co-relation 7179. Up to 3406 conditions per place. [2025-01-10 00:57:26,831 INFO L140 encePairwiseOnDemand]: 84/94 looper letters, 72 selfloop transitions, 26 changer transitions 0/102 dead transitions. [2025-01-10 00:57:26,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 102 transitions, 659 flow [2025-01-10 00:57:26,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-01-10 00:57:26,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-01-10 00:57:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 160 transitions. [2025-01-10 00:57:26,839 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.1309328968903437 [2025-01-10 00:57:26,839 INFO L175 Difference]: Start difference. First operand has 117 places, 97 transitions, 449 flow. Second operand 13 states and 160 transitions. [2025-01-10 00:57:26,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 102 transitions, 659 flow [2025-01-10 00:57:26,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 102 transitions, 629 flow, removed 10 selfloop flow, removed 3 redundant places. [2025-01-10 00:57:26,841 INFO L231 Difference]: Finished difference. Result has 128 places, 99 transitions, 485 flow [2025-01-10 00:57:26,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=485, PETRI_PLACES=128, PETRI_TRANSITIONS=99} [2025-01-10 00:57:26,846 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 36 predicate places. [2025-01-10 00:57:26,846 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 99 transitions, 485 flow [2025-01-10 00:57:26,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.7894736842105265) internal successors, (148), 19 states have internal predecessors, (148), 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) [2025-01-10 00:57:26,846 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:57:26,846 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2025-01-10 00:57:26,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-01-10 00:57:27,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:57:27,048 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-01-10 00:57:27,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:57:27,053 INFO L85 PathProgramCache]: Analyzing trace with hash 754933191, now seen corresponding path program 2 times [2025-01-10 00:57:27,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:57:27,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223918275] [2025-01-10 00:57:27,053 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 00:57:27,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:57:27,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:57:27,057 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:57:27,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-01-10 00:57:27,249 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 43 statements into 2 equivalence classes. [2025-01-10 00:57:28,131 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 43 of 43 statements. [2025-01-10 00:57:28,131 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 00:57:28,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 00:57:28,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-10 00:57:28,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 00:57:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:57:28,246 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 00:57:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 00:57:28,379 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-01-10 00:57:28,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223918275] [2025-01-10 00:57:28,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223918275] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 00:57:28,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-01-10 00:57:28,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2025-01-10 00:57:28,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136904656] [2025-01-10 00:57:28,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-01-10 00:57:28,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-10 00:57:28,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-01-10 00:57:28,381 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-10 00:57:28,382 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2025-01-10 00:57:28,382 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 94 [2025-01-10 00:57:28,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 99 transitions, 485 flow. Second operand has 12 states, 12 states have (on average 59.916666666666664) internal successors, (719), 12 states have internal predecessors, (719), 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) [2025-01-10 00:57:28,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-01-10 00:57:28,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 94 [2025-01-10 00:57:28,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-01-10 00:57:29,200 INFO L124 PetriNetUnfolderBase]: 391/1035 cut-off events. [2025-01-10 00:57:29,203 INFO L125 PetriNetUnfolderBase]: For 528/528 co-relation queries the response was YES. [2025-01-10 00:57:29,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2321 conditions, 1035 events. 391/1035 cut-off events. For 528/528 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4952 event pairs, 287 based on Foata normal form. 12/939 useless extension candidates. Maximal degree in co-relation 2249. Up to 609 conditions per place. [2025-01-10 00:57:29,208 INFO L140 encePairwiseOnDemand]: 90/94 looper letters, 87 selfloop transitions, 23 changer transitions 0/151 dead transitions. [2025-01-10 00:57:29,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 151 transitions, 1209 flow [2025-01-10 00:57:29,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-10 00:57:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-01-10 00:57:29,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 762 transitions. [2025-01-10 00:57:29,214 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.675531914893617 [2025-01-10 00:57:29,214 INFO L175 Difference]: Start difference. First operand has 128 places, 99 transitions, 485 flow. Second operand 12 states and 762 transitions. [2025-01-10 00:57:29,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 151 transitions, 1209 flow [2025-01-10 00:57:29,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 151 transitions, 1065 flow, removed 0 selfloop flow, removed 10 redundant places. [2025-01-10 00:57:29,222 INFO L231 Difference]: Finished difference. Result has 136 places, 112 transitions, 680 flow [2025-01-10 00:57:29,222 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=680, PETRI_PLACES=136, PETRI_TRANSITIONS=112} [2025-01-10 00:57:29,223 INFO L279 CegarLoopForPetriNet]: 92 programPoint places, 44 predicate places. [2025-01-10 00:57:29,223 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 112 transitions, 680 flow [2025-01-10 00:57:29,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 59.916666666666664) internal successors, (719), 12 states have internal predecessors, (719), 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) [2025-01-10 00:57:29,226 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-01-10 00:57:29,226 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2025-01-10 00:57:29,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-01-10 00:57:29,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:57:29,427 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2025-01-10 00:57:29,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 00:57:29,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1866907385, now seen corresponding path program 3 times [2025-01-10 00:57:29,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-01-10 00:57:29,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621405983] [2025-01-10 00:57:29,431 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 00:57:29,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 00:57:29,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 00:57:29,433 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 00:57:29,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-01-10 00:57:29,642 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 97 statements into 11 equivalence classes.