./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a3326bc22943076798f4c55311213b2a5f9b1e03e68dc17c2ac5a3393252251 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 09:38:21,664 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 09:38:21,719 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-04 09:38:21,724 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 09:38:21,726 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 09:38:21,747 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 09:38:21,748 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 09:38:21,748 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 09:38:21,749 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 09:38:21,749 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 09:38:21,749 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 09:38:21,750 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 09:38:21,750 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 09:38:21,750 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 09:38:21,750 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 09:38:21,751 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 09:38:21,751 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 09:38:21,751 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 09:38:21,751 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 09:38:21,751 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 09:38:21,751 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-04 09:38:21,751 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-04 09:38:21,751 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-04 09:38:21,751 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 09:38:21,751 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-04 09:38:21,751 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 09:38:21,752 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 09:38:21,752 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 09:38:21,752 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 09:38:21,752 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 09:38:21,752 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 09:38:21,752 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 09:38:21,752 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 09:38:21,752 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 09:38:21,752 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 09:38:21,753 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 09:38:21,753 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 09:38:21,753 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 09:38:21,753 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 09:38:21,753 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 09:38:21,753 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 09:38:21,753 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 09:38:21,753 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a3326bc22943076798f4c55311213b2a5f9b1e03e68dc17c2ac5a3393252251 [2025-03-04 09:38:21,955 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 09:38:21,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 09:38:21,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 09:38:21,964 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 09:38:21,964 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 09:38:21,964 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i [2025-03-04 09:38:23,075 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8233c3dd8/704a768857ca4a0b805c5a37a6a2cfe6/FLAGf18f93064 [2025-03-04 09:38:23,405 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 09:38:23,408 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i [2025-03-04 09:38:23,425 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8233c3dd8/704a768857ca4a0b805c5a37a6a2cfe6/FLAGf18f93064 [2025-03-04 09:38:23,636 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8233c3dd8/704a768857ca4a0b805c5a37a6a2cfe6 [2025-03-04 09:38:23,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 09:38:23,639 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 09:38:23,640 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 09:38:23,640 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 09:38:23,643 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 09:38:23,643 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 09:38:23" (1/1) ... [2025-03-04 09:38:23,644 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fe1cb0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:38:23, skipping insertion in model container [2025-03-04 09:38:23,644 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 09:38:23" (1/1) ... [2025-03-04 09:38:23,681 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 09:38:23,983 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:24,009 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:24,012 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:24,015 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:24,022 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:24,053 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:24,054 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:24,056 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:24,058 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:24,059 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:24,062 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:24,063 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:24,064 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:24,064 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:24,067 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:24,072 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 09:38:24,086 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2025-03-04 09:38:24,086 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2aa7915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:38:24, skipping insertion in model container [2025-03-04 09:38:24,087 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 09:38:24,087 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2025-03-04 09:38:24,090 INFO L158 Benchmark]: Toolchain (without parser) took 450.25ms. Allocated memory is still 167.8MB. Free memory was 118.6MB in the beginning and 99.5MB in the end (delta: 19.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-03-04 09:38:24,090 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 115.9MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-04 09:38:24,090 INFO L158 Benchmark]: CACSL2BoogieTranslator took 447.12ms. Allocated memory is still 167.8MB. Free memory was 118.6MB in the beginning and 99.5MB in the end (delta: 19.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-03-04 09:38:24,091 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 201.3MB. Free memory is still 115.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 447.12ms. Allocated memory is still 167.8MB. Free memory was 118.6MB in the beginning and 99.5MB in the end (delta: 19.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 833]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a3326bc22943076798f4c55311213b2a5f9b1e03e68dc17c2ac5a3393252251 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 09:38:25,699 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 09:38:25,781 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-03-04 09:38:25,787 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 09:38:25,787 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 09:38:25,806 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 09:38:25,808 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 09:38:25,808 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 09:38:25,808 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 09:38:25,808 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 09:38:25,809 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 09:38:25,809 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 09:38:25,809 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 09:38:25,809 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 09:38:25,810 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 09:38:25,810 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 09:38:25,810 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 09:38:25,810 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 09:38:25,810 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 09:38:25,810 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 09:38:25,810 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-04 09:38:25,810 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-04 09:38:25,810 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-04 09:38:25,811 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 09:38:25,811 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-04 09:38:25,811 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-03-04 09:38:25,811 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-03-04 09:38:25,811 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 09:38:25,811 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 09:38:25,811 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 09:38:25,811 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 09:38:25,812 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 09:38:25,812 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 09:38:25,812 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 09:38:25,812 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 09:38:25,812 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 09:38:25,812 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 09:38:25,812 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 09:38:25,812 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-03-04 09:38:25,812 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-03-04 09:38:25,812 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 09:38:25,812 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 09:38:25,812 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 09:38:25,812 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 09:38:25,812 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a3326bc22943076798f4c55311213b2a5f9b1e03e68dc17c2ac5a3393252251 [2025-03-04 09:38:26,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 09:38:26,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 09:38:26,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 09:38:26,033 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 09:38:26,034 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 09:38:26,034 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i [2025-03-04 09:38:27,149 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ad3f6838/8fe7664991794221972e5ff37f19778f/FLAG14d3ece52 [2025-03-04 09:38:27,438 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 09:38:27,438 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test2-2.i [2025-03-04 09:38:27,453 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ad3f6838/8fe7664991794221972e5ff37f19778f/FLAG14d3ece52 [2025-03-04 09:38:27,467 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ad3f6838/8fe7664991794221972e5ff37f19778f [2025-03-04 09:38:27,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 09:38:27,472 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 09:38:27,473 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 09:38:27,474 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 09:38:27,477 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 09:38:27,477 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 09:38:27" (1/1) ... [2025-03-04 09:38:27,478 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42b3ed29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:38:27, skipping insertion in model container [2025-03-04 09:38:27,479 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 09:38:27" (1/1) ... [2025-03-04 09:38:27,512 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 09:38:27,774 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,806 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,809 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,814 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,819 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,841 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,841 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,843 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,843 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,844 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,846 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,846 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,847 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,848 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,850 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 09:38:27,870 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2025-03-04 09:38:27,879 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 09:38:27,906 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,923 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,924 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,927 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,931 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,949 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,949 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,950 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,951 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,952 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,953 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,953 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,954 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,954 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,956 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 09:38:27,959 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 09:38:27,962 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 09:38:28,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 09:38:28,079 INFO L204 MainTranslator]: Completed translation [2025-03-04 09:38:28,080 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:38:28 WrapperNode [2025-03-04 09:38:28,080 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 09:38:28,081 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 09:38:28,081 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 09:38:28,082 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 09:38:28,086 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:38:28" (1/1) ... [2025-03-04 09:38:28,105 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:38:28" (1/1) ... [2025-03-04 09:38:28,141 INFO L138 Inliner]: procedures = 211, calls = 280, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1037 [2025-03-04 09:38:28,142 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 09:38:28,142 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 09:38:28,143 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 09:38:28,143 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 09:38:28,155 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:38:28" (1/1) ... [2025-03-04 09:38:28,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:38:28" (1/1) ... [2025-03-04 09:38:28,161 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:38:28" (1/1) ... [2025-03-04 09:38:28,240 INFO L175 MemorySlicer]: Split 256 memory accesses to 3 slices as follows [2, 34, 220]. 86 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 54 writes are split as follows [0, 4, 50]. [2025-03-04 09:38:28,240 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:38:28" (1/1) ... [2025-03-04 09:38:28,240 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:38:28" (1/1) ... [2025-03-04 09:38:28,275 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:38:28" (1/1) ... [2025-03-04 09:38:28,277 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:38:28" (1/1) ... [2025-03-04 09:38:28,280 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:38:28" (1/1) ... [2025-03-04 09:38:28,281 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:38:28" (1/1) ... [2025-03-04 09:38:28,286 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 09:38:28,287 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 09:38:28,287 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 09:38:28,287 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 09:38:28,288 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:38:28" (1/1) ... [2025-03-04 09:38:28,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 09:38:28,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:38:28,317 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-04 09:38:28,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-04 09:38:28,339 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2025-03-04 09:38:28,339 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2025-03-04 09:38:28,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2025-03-04 09:38:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2025-03-04 09:38:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2025-03-04 09:38:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-03-04 09:38:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2025-03-04 09:38:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#2 [2025-03-04 09:38:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#0 [2025-03-04 09:38:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#1 [2025-03-04 09:38:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset#2 [2025-03-04 09:38:28,340 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#0 [2025-03-04 09:38:28,340 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#1 [2025-03-04 09:38:28,340 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset#2 [2025-03-04 09:38:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-04 09:38:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-04 09:38:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-04 09:38:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-03-04 09:38:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-04 09:38:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-03-04 09:38:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2025-03-04 09:38:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#2 [2025-03-04 09:38:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-03-04 09:38:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-03-04 09:38:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2025-03-04 09:38:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-03-04 09:38:28,342 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-03-04 09:38:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-04 09:38:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 09:38:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-04 09:38:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-04 09:38:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-03-04 09:38:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 09:38:28,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 09:38:28,534 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 09:38:28,535 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 09:38:31,153 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L812: call ULTIMATE.dealloc(main_~#i~0#1.base, main_~#i~0#1.offset);havoc main_~#i~0#1.base, main_~#i~0#1.offset; [2025-03-04 09:38:31,245 INFO L? ?]: Removed 1100 outVars from TransFormulas that were not future-live. [2025-03-04 09:38:31,245 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 09:38:31,273 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 09:38:31,273 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 09:38:31,274 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 09:38:31 BoogieIcfgContainer [2025-03-04 09:38:31,276 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 09:38:31,278 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 09:38:31,278 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 09:38:31,281 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 09:38:31,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 09:38:27" (1/3) ... [2025-03-04 09:38:31,282 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644abde9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 09:38:31, skipping insertion in model container [2025-03-04 09:38:31,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 09:38:28" (2/3) ... [2025-03-04 09:38:31,282 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644abde9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 09:38:31, skipping insertion in model container [2025-03-04 09:38:31,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 09:38:31" (3/3) ... [2025-03-04 09:38:31,283 INFO L128 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test2-2.i [2025-03-04 09:38:31,292 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 09:38:31,293 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG uthash_SFH_test2-2.i that has 6 procedures, 1086 locations, 1 initial locations, 36 loop locations, and 529 error locations. [2025-03-04 09:38:31,337 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 09:38:31,347 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;@499ef9a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 09:38:31,348 INFO L334 AbstractCegarLoop]: Starting to check reachability of 529 error locations. [2025-03-04 09:38:31,354 INFO L276 IsEmpty]: Start isEmpty. Operand has 1076 states, 536 states have (on average 2.216417910447761) internal successors, (1188), 1069 states have internal predecessors, (1188), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2025-03-04 09:38:31,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2025-03-04 09:38:31,359 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:38:31,359 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1] [2025-03-04 09:38:31,360 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr527REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:38:31,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:38:31,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1239232, now seen corresponding path program 1 times [2025-03-04 09:38:31,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:38:31,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249031850] [2025-03-04 09:38:31,370 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:38:31,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:31,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:38:31,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:38:31,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 09:38:31,478 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-04 09:38:31,483 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-04 09:38:31,483 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:38:31,483 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:38:31,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-04 09:38:31,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:38:31,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 09:38:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:38:31,536 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 09:38:31,537 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:38:31,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249031850] [2025-03-04 09:38:31,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249031850] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:38:31,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:38:31,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 09:38:31,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226238330] [2025-03-04 09:38:31,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:38:31,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 09:38:31,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:38:31,558 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 09:38:31,558 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 09:38:31,561 INFO L87 Difference]: Start difference. First operand has 1076 states, 536 states have (on average 2.216417910447761) internal successors, (1188), 1069 states have internal predecessors, (1188), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:33,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:38:33,244 INFO L93 Difference]: Finished difference Result 1488 states and 1604 transitions. [2025-03-04 09:38:33,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 09:38:33,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) Word has length 3 [2025-03-04 09:38:33,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:38:33,260 INFO L225 Difference]: With dead ends: 1488 [2025-03-04 09:38:33,260 INFO L226 Difference]: Without dead ends: 1486 [2025-03-04 09:38:33,261 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 09:38:33,263 INFO L435 NwaCegarLoop]: 933 mSDtfsCounter, 455 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 1529 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-03-04 09:38:33,264 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 1529 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-03-04 09:38:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2025-03-04 09:38:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1199. [2025-03-04 09:38:33,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 662 states have (on average 2.0574018126888216) internal successors, (1362), 1192 states have internal predecessors, (1362), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-04 09:38:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1390 transitions. [2025-03-04 09:38:33,343 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1390 transitions. Word has length 3 [2025-03-04 09:38:33,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:38:33,343 INFO L471 AbstractCegarLoop]: Abstraction has 1199 states and 1390 transitions. [2025-03-04 09:38:33,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:33,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1390 transitions. [2025-03-04 09:38:33,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2025-03-04 09:38:33,343 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:38:33,343 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1] [2025-03-04 09:38:33,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-04 09:38:33,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:33,544 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr526REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:38:33,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:38:33,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1239231, now seen corresponding path program 1 times [2025-03-04 09:38:33,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:38:33,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557625114] [2025-03-04 09:38:33,545 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:38:33,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:33,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:38:33,548 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:38:33,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-04 09:38:33,623 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-04 09:38:33,626 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-04 09:38:33,626 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:38:33,626 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:38:33,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 09:38:33,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:38:33,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-04 09:38:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:38:33,640 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 09:38:33,640 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:38:33,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557625114] [2025-03-04 09:38:33,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557625114] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:38:33,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:38:33,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 09:38:33,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762232840] [2025-03-04 09:38:33,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:38:33,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 09:38:33,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:38:33,641 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 09:38:33,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 09:38:33,641 INFO L87 Difference]: Start difference. First operand 1199 states and 1390 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:34,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:38:34,651 INFO L93 Difference]: Finished difference Result 1374 states and 1569 transitions. [2025-03-04 09:38:34,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 09:38:34,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) Word has length 3 [2025-03-04 09:38:34,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:38:34,656 INFO L225 Difference]: With dead ends: 1374 [2025-03-04 09:38:34,656 INFO L226 Difference]: Without dead ends: 1374 [2025-03-04 09:38:34,656 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 09:38:34,656 INFO L435 NwaCegarLoop]: 651 mSDtfsCounter, 977 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 985 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2025-03-04 09:38:34,656 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [985 Valid, 804 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2025-03-04 09:38:34,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2025-03-04 09:38:34,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1196. [2025-03-04 09:38:34,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 670 states have (on average 2.02089552238806) internal successors, (1354), 1189 states have internal predecessors, (1354), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-04 09:38:34,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1382 transitions. [2025-03-04 09:38:34,675 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1382 transitions. Word has length 3 [2025-03-04 09:38:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:38:34,675 INFO L471 AbstractCegarLoop]: Abstraction has 1196 states and 1382 transitions. [2025-03-04 09:38:34,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1382 transitions. [2025-03-04 09:38:34,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-04 09:38:34,675 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:38:34,675 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:38:34,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-04 09:38:34,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:34,876 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr523REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:38:34,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:38:34,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2030875611, now seen corresponding path program 1 times [2025-03-04 09:38:34,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:38:34,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998385328] [2025-03-04 09:38:34,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:38:34,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:34,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:38:34,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:38:34,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-04 09:38:34,962 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-04 09:38:34,971 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-04 09:38:34,971 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:38:34,971 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:38:34,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-04 09:38:34,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:38:34,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 09:38:35,026 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2025-03-04 09:38:35,026 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 12 treesize of output 18 [2025-03-04 09:38:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:38:35,073 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 09:38:35,073 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:38:35,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998385328] [2025-03-04 09:38:35,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998385328] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:38:35,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:38:35,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 09:38:35,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918353201] [2025-03-04 09:38:35,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:38:35,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 09:38:35,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:38:35,074 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 09:38:35,074 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 09:38:35,074 INFO L87 Difference]: Start difference. First operand 1196 states and 1382 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:38,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:38:38,087 INFO L93 Difference]: Finished difference Result 2190 states and 2360 transitions. [2025-03-04 09:38:38,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 09:38:38,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) Word has length 7 [2025-03-04 09:38:38,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:38:38,094 INFO L225 Difference]: With dead ends: 2190 [2025-03-04 09:38:38,094 INFO L226 Difference]: Without dead ends: 2190 [2025-03-04 09:38:38,094 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 09:38:38,095 INFO L435 NwaCegarLoop]: 1063 mSDtfsCounter, 1203 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1213 SdHoareTripleChecker+Valid, 2243 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2025-03-04 09:38:38,096 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1213 Valid, 2243 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2025-03-04 09:38:38,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2025-03-04 09:38:38,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1342. [2025-03-04 09:38:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 816 states have (on average 2.0073529411764706) internal successors, (1638), 1335 states have internal predecessors, (1638), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-04 09:38:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1666 transitions. [2025-03-04 09:38:38,135 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1666 transitions. Word has length 7 [2025-03-04 09:38:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:38:38,135 INFO L471 AbstractCegarLoop]: Abstraction has 1342 states and 1666 transitions. [2025-03-04 09:38:38,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:38,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1666 transitions. [2025-03-04 09:38:38,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-04 09:38:38,136 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:38:38,136 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:38:38,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-04 09:38:38,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:38,340 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr521REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:38:38,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:38:38,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1467364361, now seen corresponding path program 1 times [2025-03-04 09:38:38,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:38:38,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295761550] [2025-03-04 09:38:38,341 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:38:38,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:38,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:38:38,343 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:38:38,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-04 09:38:38,426 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-04 09:38:38,437 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-04 09:38:38,437 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:38:38,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:38:38,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-04 09:38:38,441 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:38:38,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 09:38:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:38:38,470 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 09:38:38,470 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:38:38,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295761550] [2025-03-04 09:38:38,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295761550] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:38:38,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:38:38,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 09:38:38,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369629832] [2025-03-04 09:38:38,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:38:38,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 09:38:38,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:38:38,473 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 09:38:38,473 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 09:38:38,474 INFO L87 Difference]: Start difference. First operand 1342 states and 1666 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:39,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:38:39,816 INFO L93 Difference]: Finished difference Result 1788 states and 2258 transitions. [2025-03-04 09:38:39,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 09:38:39,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) Word has length 8 [2025-03-04 09:38:39,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:38:39,821 INFO L225 Difference]: With dead ends: 1788 [2025-03-04 09:38:39,821 INFO L226 Difference]: Without dead ends: 1788 [2025-03-04 09:38:39,823 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 09:38:39,825 INFO L435 NwaCegarLoop]: 1130 mSDtfsCounter, 522 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-04 09:38:39,826 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1574 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-04 09:38:39,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2025-03-04 09:38:39,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1369. [2025-03-04 09:38:39,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 853 states have (on average 1.9871043376318875) internal successors, (1695), 1362 states have internal predecessors, (1695), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-04 09:38:39,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 1723 transitions. [2025-03-04 09:38:39,847 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 1723 transitions. Word has length 8 [2025-03-04 09:38:39,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:38:39,847 INFO L471 AbstractCegarLoop]: Abstraction has 1369 states and 1723 transitions. [2025-03-04 09:38:39,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:39,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 1723 transitions. [2025-03-04 09:38:39,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-04 09:38:39,848 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:38:39,848 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:38:39,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-04 09:38:40,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:40,049 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr520REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:38:40,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:38:40,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1467364362, now seen corresponding path program 1 times [2025-03-04 09:38:40,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:38:40,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227752660] [2025-03-04 09:38:40,049 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:38:40,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:40,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:38:40,051 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:38:40,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-04 09:38:40,125 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-04 09:38:40,132 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-04 09:38:40,132 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:38:40,132 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:38:40,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 09:38:40,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:38:40,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-04 09:38:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:38:40,147 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 09:38:40,147 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:38:40,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227752660] [2025-03-04 09:38:40,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227752660] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:38:40,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:38:40,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 09:38:40,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4096430] [2025-03-04 09:38:40,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:38:40,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 09:38:40,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:38:40,148 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 09:38:40,148 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 09:38:40,148 INFO L87 Difference]: Start difference. First operand 1369 states and 1723 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:41,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:38:41,058 INFO L93 Difference]: Finished difference Result 1547 states and 1918 transitions. [2025-03-04 09:38:41,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 09:38:41,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) Word has length 8 [2025-03-04 09:38:41,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:38:41,062 INFO L225 Difference]: With dead ends: 1547 [2025-03-04 09:38:41,062 INFO L226 Difference]: Without dead ends: 1547 [2025-03-04 09:38:41,062 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 09:38:41,062 INFO L435 NwaCegarLoop]: 920 mSDtfsCounter, 770 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 778 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2025-03-04 09:38:41,062 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [778 Valid, 1197 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2025-03-04 09:38:41,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2025-03-04 09:38:41,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1322. [2025-03-04 09:38:41,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 853 states have (on average 1.914419695193435) internal successors, (1633), 1315 states have internal predecessors, (1633), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-04 09:38:41,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1661 transitions. [2025-03-04 09:38:41,090 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1661 transitions. Word has length 8 [2025-03-04 09:38:41,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:38:41,090 INFO L471 AbstractCegarLoop]: Abstraction has 1322 states and 1661 transitions. [2025-03-04 09:38:41,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:41,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1661 transitions. [2025-03-04 09:38:41,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-03-04 09:38:41,090 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:38:41,090 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:38:41,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-04 09:38:41,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:41,291 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr104REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:38:41,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:38:41,292 INFO L85 PathProgramCache]: Analyzing trace with hash 633618071, now seen corresponding path program 1 times [2025-03-04 09:38:41,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:38:41,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153275018] [2025-03-04 09:38:41,292 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:38:41,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:41,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:38:41,294 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:38:41,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-04 09:38:41,378 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 09:38:41,389 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 09:38:41,389 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:38:41,389 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:38:41,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 09:38:41,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:38:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:38:41,429 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 09:38:41,429 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:38:41,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153275018] [2025-03-04 09:38:41,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153275018] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:38:41,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:38:41,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 09:38:41,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85064254] [2025-03-04 09:38:41,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:38:41,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 09:38:41,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:38:41,430 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 09:38:41,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 09:38:41,430 INFO L87 Difference]: Start difference. First operand 1322 states and 1661 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:41,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:38:41,581 INFO L93 Difference]: Finished difference Result 1587 states and 1832 transitions. [2025-03-04 09:38:41,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 09:38:41,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) Word has length 11 [2025-03-04 09:38:41,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:38:41,586 INFO L225 Difference]: With dead ends: 1587 [2025-03-04 09:38:41,586 INFO L226 Difference]: Without dead ends: 1587 [2025-03-04 09:38:41,586 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 09:38:41,587 INFO L435 NwaCegarLoop]: 1130 mSDtfsCounter, 478 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 2107 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 09:38:41,587 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 2107 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 09:38:41,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2025-03-04 09:38:41,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1318. [2025-03-04 09:38:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 844 states have (on average 1.8898104265402844) internal successors, (1595), 1311 states have internal predecessors, (1595), 20 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 18 states have call successors, (18) [2025-03-04 09:38:41,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 1633 transitions. [2025-03-04 09:38:41,606 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 1633 transitions. Word has length 11 [2025-03-04 09:38:41,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:38:41,607 INFO L471 AbstractCegarLoop]: Abstraction has 1318 states and 1633 transitions. [2025-03-04 09:38:41,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:41,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 1633 transitions. [2025-03-04 09:38:41,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-04 09:38:41,607 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:38:41,607 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:38:41,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-04 09:38:41,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:41,811 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr196REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:38:41,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:38:41,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1824889614, now seen corresponding path program 1 times [2025-03-04 09:38:41,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:38:41,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487031444] [2025-03-04 09:38:41,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:38:41,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:41,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:38:41,814 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:38:41,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-04 09:38:41,899 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-04 09:38:41,910 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-04 09:38:41,910 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:38:41,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:38:41,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 09:38:41,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:38:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:38:41,948 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 09:38:41,948 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:38:41,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487031444] [2025-03-04 09:38:41,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487031444] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:38:41,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:38:41,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 09:38:41,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769442067] [2025-03-04 09:38:41,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:38:41,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 09:38:41,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:38:41,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 09:38:41,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 09:38:41,949 INFO L87 Difference]: Start difference. First operand 1318 states and 1633 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:43,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:38:43,354 INFO L93 Difference]: Finished difference Result 1485 states and 1763 transitions. [2025-03-04 09:38:43,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 09:38:43,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) Word has length 12 [2025-03-04 09:38:43,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:38:43,357 INFO L225 Difference]: With dead ends: 1485 [2025-03-04 09:38:43,357 INFO L226 Difference]: Without dead ends: 1485 [2025-03-04 09:38:43,357 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-04 09:38:43,358 INFO L435 NwaCegarLoop]: 609 mSDtfsCounter, 975 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2025-03-04 09:38:43,359 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 1259 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2025-03-04 09:38:43,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2025-03-04 09:38:43,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 1295. [2025-03-04 09:38:43,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 844 states have (on average 1.8080568720379147) internal successors, (1526), 1288 states have internal predecessors, (1526), 20 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 18 states have call successors, (18) [2025-03-04 09:38:43,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1564 transitions. [2025-03-04 09:38:43,374 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1564 transitions. Word has length 12 [2025-03-04 09:38:43,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:38:43,374 INFO L471 AbstractCegarLoop]: Abstraction has 1295 states and 1564 transitions. [2025-03-04 09:38:43,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:43,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1564 transitions. [2025-03-04 09:38:43,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2025-03-04 09:38:43,375 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:38:43,375 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:38:43,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-04 09:38:43,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:43,576 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr197REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:38:43,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:38:43,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1824889613, now seen corresponding path program 1 times [2025-03-04 09:38:43,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:38:43,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278006511] [2025-03-04 09:38:43,577 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:38:43,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:43,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:38:43,578 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:38:43,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-04 09:38:43,661 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-04 09:38:43,672 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-04 09:38:43,672 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:38:43,672 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:38:43,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 09:38:43,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:38:43,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 09:38:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:38:43,741 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 09:38:43,741 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:38:43,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278006511] [2025-03-04 09:38:43,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278006511] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:38:43,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:38:43,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 09:38:43,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473882155] [2025-03-04 09:38:43,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:38:43,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 09:38:43,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:38:43,742 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 09:38:43,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 09:38:43,742 INFO L87 Difference]: Start difference. First operand 1295 states and 1564 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:45,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:38:45,358 INFO L93 Difference]: Finished difference Result 1489 states and 1733 transitions. [2025-03-04 09:38:45,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 09:38:45,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) Word has length 12 [2025-03-04 09:38:45,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:38:45,361 INFO L225 Difference]: With dead ends: 1489 [2025-03-04 09:38:45,361 INFO L226 Difference]: Without dead ends: 1489 [2025-03-04 09:38:45,361 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-04 09:38:45,362 INFO L435 NwaCegarLoop]: 915 mSDtfsCounter, 348 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1960 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2025-03-04 09:38:45,362 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 1960 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2025-03-04 09:38:45,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1489 states. [2025-03-04 09:38:45,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1489 to 1276. [2025-03-04 09:38:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 825 states have (on average 1.7987878787878788) internal successors, (1484), 1269 states have internal predecessors, (1484), 20 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 18 states have call successors, (18) [2025-03-04 09:38:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1522 transitions. [2025-03-04 09:38:45,378 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1522 transitions. Word has length 12 [2025-03-04 09:38:45,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:38:45,378 INFO L471 AbstractCegarLoop]: Abstraction has 1276 states and 1522 transitions. [2025-03-04 09:38:45,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:45,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1522 transitions. [2025-03-04 09:38:45,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2025-03-04 09:38:45,379 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:38:45,379 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:38:45,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-04 09:38:45,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:45,579 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:38:45,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:38:45,580 INFO L85 PathProgramCache]: Analyzing trace with hash -978421710, now seen corresponding path program 1 times [2025-03-04 09:38:45,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:38:45,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1226600127] [2025-03-04 09:38:45,580 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:38:45,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:45,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:38:45,583 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:38:45,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-04 09:38:45,662 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-04 09:38:45,673 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-04 09:38:45,673 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:38:45,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:38:45,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-04 09:38:45,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:38:45,683 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-04 09:38:45,683 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-04 09:38:45,687 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-04 09:38:45,690 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 30 treesize of output 39 [2025-03-04 09:38:45,726 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 09:38:45,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 26 [2025-03-04 09:38:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:38:45,735 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 09:38:45,735 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:38:45,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226600127] [2025-03-04 09:38:45,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226600127] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:38:45,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:38:45,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 09:38:45,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708153519] [2025-03-04 09:38:45,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:38:45,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 09:38:45,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:38:45,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 09:38:45,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 09:38:45,736 INFO L87 Difference]: Start difference. First operand 1276 states and 1522 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:46,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:38:46,078 INFO L93 Difference]: Finished difference Result 2043 states and 2294 transitions. [2025-03-04 09:38:46,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 09:38:46,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) Word has length 13 [2025-03-04 09:38:46,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:38:46,083 INFO L225 Difference]: With dead ends: 2043 [2025-03-04 09:38:46,083 INFO L226 Difference]: Without dead ends: 2043 [2025-03-04 09:38:46,083 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-04 09:38:46,085 INFO L435 NwaCegarLoop]: 995 mSDtfsCounter, 947 mSDsluCounter, 1971 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 2966 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-04 09:38:46,085 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 2966 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-04 09:38:46,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2025-03-04 09:38:46,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1198. [2025-03-04 09:38:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 752 states have (on average 1.8444148936170213) internal successors, (1387), 1191 states have internal predecessors, (1387), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-04 09:38:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1415 transitions. [2025-03-04 09:38:46,100 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1415 transitions. Word has length 13 [2025-03-04 09:38:46,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:38:46,100 INFO L471 AbstractCegarLoop]: Abstraction has 1198 states and 1415 transitions. [2025-03-04 09:38:46,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:46,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1415 transitions. [2025-03-04 09:38:46,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-04 09:38:46,101 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:38:46,101 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:38:46,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-04 09:38:46,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:46,302 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr512REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:38:46,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:38:46,302 INFO L85 PathProgramCache]: Analyzing trace with hash -156720049, now seen corresponding path program 1 times [2025-03-04 09:38:46,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:38:46,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551190367] [2025-03-04 09:38:46,303 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:38:46,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:46,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:38:46,305 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:38:46,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-04 09:38:46,393 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-04 09:38:46,411 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 09:38:46,412 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:38:46,412 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:38:46,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-04 09:38:46,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:38:46,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-04 09:38:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:38:46,453 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 09:38:46,453 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:38:46,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551190367] [2025-03-04 09:38:46,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551190367] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:38:46,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:38:46,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 09:38:46,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488617393] [2025-03-04 09:38:46,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:38:46,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 09:38:46,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:38:46,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 09:38:46,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 09:38:46,454 INFO L87 Difference]: Start difference. First operand 1198 states and 1415 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:38:47,540 INFO L93 Difference]: Finished difference Result 1183 states and 1377 transitions. [2025-03-04 09:38:47,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 09:38:47,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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) Word has length 17 [2025-03-04 09:38:47,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:38:47,543 INFO L225 Difference]: With dead ends: 1183 [2025-03-04 09:38:47,543 INFO L226 Difference]: Without dead ends: 1183 [2025-03-04 09:38:47,543 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-04 09:38:47,543 INFO L435 NwaCegarLoop]: 643 mSDtfsCounter, 794 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2025-03-04 09:38:47,543 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 1221 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2025-03-04 09:38:47,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2025-03-04 09:38:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1175. [2025-03-04 09:38:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 752 states have (on average 1.7832446808510638) internal successors, (1341), 1168 states have internal predecessors, (1341), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-04 09:38:47,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1369 transitions. [2025-03-04 09:38:47,554 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1369 transitions. Word has length 17 [2025-03-04 09:38:47,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:38:47,554 INFO L471 AbstractCegarLoop]: Abstraction has 1175 states and 1369 transitions. [2025-03-04 09:38:47,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:47,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1369 transitions. [2025-03-04 09:38:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2025-03-04 09:38:47,555 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:38:47,555 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:38:47,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-04 09:38:47,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:47,759 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr513REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:38:47,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:38:47,759 INFO L85 PathProgramCache]: Analyzing trace with hash -156720048, now seen corresponding path program 1 times [2025-03-04 09:38:47,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:38:47,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568686617] [2025-03-04 09:38:47,759 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:38:47,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:47,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:38:47,762 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:38:47,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-04 09:38:47,857 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-04 09:38:47,887 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 09:38:47,887 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:38:47,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:38:47,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 09:38:47,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:38:47,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 09:38:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:38:47,955 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 09:38:47,955 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:38:47,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568686617] [2025-03-04 09:38:47,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568686617] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:38:47,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:38:47,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 09:38:47,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931924866] [2025-03-04 09:38:47,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:38:47,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 09:38:47,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:38:47,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 09:38:47,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 09:38:47,957 INFO L87 Difference]: Start difference. First operand 1175 states and 1369 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:49,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:38:49,709 INFO L93 Difference]: Finished difference Result 1661 states and 1931 transitions. [2025-03-04 09:38:49,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 09:38:49,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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) Word has length 17 [2025-03-04 09:38:49,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:38:49,713 INFO L225 Difference]: With dead ends: 1661 [2025-03-04 09:38:49,713 INFO L226 Difference]: Without dead ends: 1661 [2025-03-04 09:38:49,715 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-04 09:38:49,715 INFO L435 NwaCegarLoop]: 1114 mSDtfsCounter, 619 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 2217 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-03-04 09:38:49,715 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 2217 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1331 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-03-04 09:38:49,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2025-03-04 09:38:49,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1289. [2025-03-04 09:38:49,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 866 states have (on average 1.707852193995381) internal successors, (1479), 1282 states have internal predecessors, (1479), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-04 09:38:49,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 1507 transitions. [2025-03-04 09:38:49,727 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 1507 transitions. Word has length 17 [2025-03-04 09:38:49,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:38:49,727 INFO L471 AbstractCegarLoop]: Abstraction has 1289 states and 1507 transitions. [2025-03-04 09:38:49,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:49,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 1507 transitions. [2025-03-04 09:38:49,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2025-03-04 09:38:49,728 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:38:49,728 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:38:49,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-04 09:38:49,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:49,929 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr513REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:38:49,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:38:49,929 INFO L85 PathProgramCache]: Analyzing trace with hash -307285068, now seen corresponding path program 1 times [2025-03-04 09:38:49,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:38:49,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98533242] [2025-03-04 09:38:49,930 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:38:49,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:49,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:38:49,932 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:38:49,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-04 09:38:50,042 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-04 09:38:50,091 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-04 09:38:50,091 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:38:50,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:38:50,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-04 09:38:50,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:38:50,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 09:38:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:38:50,232 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 09:38:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:38:50,524 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:38:50,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98533242] [2025-03-04 09:38:50,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98533242] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 09:38:50,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 09:38:50,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2025-03-04 09:38:50,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234350804] [2025-03-04 09:38:50,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 09:38:50,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-04 09:38:50,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:38:50,525 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-04 09:38:50,525 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-04 09:38:50,525 INFO L87 Difference]: Start difference. First operand 1289 states and 1507 transitions. Second operand has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:56,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:38:56,610 INFO L93 Difference]: Finished difference Result 2017 states and 2421 transitions. [2025-03-04 09:38:56,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-04 09:38:56,611 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 8 states have internal predecessors, (68), 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) Word has length 36 [2025-03-04 09:38:56,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:38:56,615 INFO L225 Difference]: With dead ends: 2017 [2025-03-04 09:38:56,615 INFO L226 Difference]: Without dead ends: 2017 [2025-03-04 09:38:56,615 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2025-03-04 09:38:56,615 INFO L435 NwaCegarLoop]: 1140 mSDtfsCounter, 1139 mSDsluCounter, 3543 mSDsCounter, 0 mSdLazyCounter, 3795 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 4683 SdHoareTripleChecker+Invalid, 3822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2025-03-04 09:38:56,616 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1145 Valid, 4683 Invalid, 3822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 3795 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2025-03-04 09:38:56,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2025-03-04 09:38:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1453. [2025-03-04 09:38:56,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1030 states have (on average 1.6611650485436893) internal successors, (1711), 1446 states have internal predecessors, (1711), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-04 09:38:56,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 1739 transitions. [2025-03-04 09:38:56,631 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 1739 transitions. Word has length 36 [2025-03-04 09:38:56,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:38:56,632 INFO L471 AbstractCegarLoop]: Abstraction has 1453 states and 1739 transitions. [2025-03-04 09:38:56,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.714285714285714) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:56,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 1739 transitions. [2025-03-04 09:38:56,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-04 09:38:56,633 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:38:56,633 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:38:56,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-04 09:38:56,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:56,833 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr431REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:38:56,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:38:56,834 INFO L85 PathProgramCache]: Analyzing trace with hash -784416233, now seen corresponding path program 1 times [2025-03-04 09:38:56,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:38:56,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068769690] [2025-03-04 09:38:56,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:38:56,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:56,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:38:56,836 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:38:56,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-04 09:38:56,937 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-04 09:38:56,988 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-04 09:38:56,988 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:38:56,988 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:38:56,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 09:38:57,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:38:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:38:57,026 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 09:38:57,026 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:38:57,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068769690] [2025-03-04 09:38:57,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068769690] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:38:57,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:38:57,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 09:38:57,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917340219] [2025-03-04 09:38:57,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:38:57,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 09:38:57,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:38:57,027 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 09:38:57,027 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 09:38:57,027 INFO L87 Difference]: Start difference. First operand 1453 states and 1739 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:57,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:38:57,099 INFO L93 Difference]: Finished difference Result 1142 states and 1303 transitions. [2025-03-04 09:38:57,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 09:38:57,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) Word has length 51 [2025-03-04 09:38:57,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:38:57,102 INFO L225 Difference]: With dead ends: 1142 [2025-03-04 09:38:57,102 INFO L226 Difference]: Without dead ends: 1142 [2025-03-04 09:38:57,102 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-04 09:38:57,102 INFO L435 NwaCegarLoop]: 954 mSDtfsCounter, 56 mSDsluCounter, 1835 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 2789 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 09:38:57,103 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 2789 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 09:38:57,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2025-03-04 09:38:57,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 1140. [2025-03-04 09:38:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 740 states have (on average 1.7202702702702704) internal successors, (1273), 1133 states have internal predecessors, (1273), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-04 09:38:57,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1301 transitions. [2025-03-04 09:38:57,113 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1301 transitions. Word has length 51 [2025-03-04 09:38:57,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:38:57,114 INFO L471 AbstractCegarLoop]: Abstraction has 1140 states and 1301 transitions. [2025-03-04 09:38:57,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:57,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1301 transitions. [2025-03-04 09:38:57,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2025-03-04 09:38:57,116 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:38:57,116 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:38:57,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-04 09:38:57,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:57,317 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr431REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:38:57,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:38:57,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1451049137, now seen corresponding path program 1 times [2025-03-04 09:38:57,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:38:57,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040217102] [2025-03-04 09:38:57,318 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:38:57,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:57,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:38:57,320 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:38:57,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-04 09:38:57,420 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-04 09:38:57,478 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-04 09:38:57,478 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:38:57,478 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:38:57,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-04 09:38:57,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:38:57,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 09:38:57,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-04 09:38:57,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-04 09:38:57,838 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-04 09:38:57,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-04 09:38:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:38:57,848 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 09:38:57,848 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:38:57,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040217102] [2025-03-04 09:38:57,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040217102] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:38:57,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:38:57,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 09:38:57,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707739061] [2025-03-04 09:38:57,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:38:57,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 09:38:57,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:38:57,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 09:38:57,849 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-03-04 09:38:57,849 INFO L87 Difference]: Start difference. First operand 1140 states and 1301 transitions. Second operand has 5 states, 4 states have (on average 14.75) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:59,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:38:59,206 INFO L93 Difference]: Finished difference Result 1102 states and 1263 transitions. [2025-03-04 09:38:59,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 09:38:59,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 5 states have internal predecessors, (59), 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) Word has length 59 [2025-03-04 09:38:59,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:38:59,209 INFO L225 Difference]: With dead ends: 1102 [2025-03-04 09:38:59,209 INFO L226 Difference]: Without dead ends: 1102 [2025-03-04 09:38:59,209 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2025-03-04 09:38:59,209 INFO L435 NwaCegarLoop]: 493 mSDtfsCounter, 1317 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1325 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2025-03-04 09:38:59,209 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1325 Valid, 817 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2025-03-04 09:38:59,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2025-03-04 09:38:59,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1065. [2025-03-04 09:38:59,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 703 states have (on average 1.6514935988620199) internal successors, (1161), 1058 states have internal predecessors, (1161), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-04 09:38:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1189 transitions. [2025-03-04 09:38:59,218 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1189 transitions. Word has length 59 [2025-03-04 09:38:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:38:59,218 INFO L471 AbstractCegarLoop]: Abstraction has 1065 states and 1189 transitions. [2025-03-04 09:38:59,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:38:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1189 transitions. [2025-03-04 09:38:59,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-04 09:38:59,218 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:38:59,218 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:38:59,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-04 09:38:59,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:59,419 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr424REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:38:59,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:38:59,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1602311516, now seen corresponding path program 1 times [2025-03-04 09:38:59,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:38:59,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308355340] [2025-03-04 09:38:59,420 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:38:59,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:38:59,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:38:59,421 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:38:59,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-04 09:38:59,528 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-03-04 09:38:59,596 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-03-04 09:38:59,596 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:38:59,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:38:59,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-04 09:38:59,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:38:59,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-04 09:38:59,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-04 09:38:59,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-04 09:38:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:38:59,650 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 09:38:59,650 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:38:59,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308355340] [2025-03-04 09:38:59,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308355340] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:38:59,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:38:59,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 09:38:59,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118970852] [2025-03-04 09:38:59,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:38:59,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 09:38:59,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:38:59,651 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 09:38:59,651 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-04 09:38:59,651 INFO L87 Difference]: Start difference. First operand 1065 states and 1189 transitions. Second operand has 5 states, 4 states have (on average 16.0) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:39:00,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:39:00,895 INFO L93 Difference]: Finished difference Result 1064 states and 1188 transitions. [2025-03-04 09:39:00,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 09:39:00,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.0) internal successors, (64), 5 states have internal predecessors, (64), 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) Word has length 64 [2025-03-04 09:39:00,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:39:00,897 INFO L225 Difference]: With dead ends: 1064 [2025-03-04 09:39:00,897 INFO L226 Difference]: Without dead ends: 1064 [2025-03-04 09:39:00,898 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-04 09:39:00,898 INFO L435 NwaCegarLoop]: 926 mSDtfsCounter, 2 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2471 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2025-03-04 09:39:00,898 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2471 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2025-03-04 09:39:00,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2025-03-04 09:39:00,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1064. [2025-03-04 09:39:00,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 703 states have (on average 1.6500711237553343) internal successors, (1160), 1057 states have internal predecessors, (1160), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-04 09:39:00,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1188 transitions. [2025-03-04 09:39:00,905 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1188 transitions. Word has length 64 [2025-03-04 09:39:00,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:39:00,906 INFO L471 AbstractCegarLoop]: Abstraction has 1064 states and 1188 transitions. [2025-03-04 09:39:00,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.0) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:39:00,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1188 transitions. [2025-03-04 09:39:00,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2025-03-04 09:39:00,906 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:39:00,906 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:39:00,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-04 09:39:01,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:39:01,107 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr425REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:39:01,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:39:01,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1602311515, now seen corresponding path program 1 times [2025-03-04 09:39:01,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:39:01,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666949209] [2025-03-04 09:39:01,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:39:01,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:39:01,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:39:01,109 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:39:01,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-04 09:39:01,216 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 64 statements into 1 equivalence classes. [2025-03-04 09:39:01,271 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 64 of 64 statements. [2025-03-04 09:39:01,271 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:39:01,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:39:01,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-04 09:39:01,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:39:01,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 09:39:01,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2025-03-04 09:39:01,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-04 09:39:01,335 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 21 treesize of output 9 [2025-03-04 09:39:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:39:01,346 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 09:39:01,346 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:39:01,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666949209] [2025-03-04 09:39:01,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666949209] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:39:01,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:39:01,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 09:39:01,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117279716] [2025-03-04 09:39:01,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:39:01,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 09:39:01,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:39:01,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 09:39:01,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-04 09:39:01,347 INFO L87 Difference]: Start difference. First operand 1064 states and 1188 transitions. Second operand has 5 states, 4 states have (on average 16.0) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:39:03,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:39:03,032 INFO L93 Difference]: Finished difference Result 1063 states and 1187 transitions. [2025-03-04 09:39:03,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 09:39:03,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.0) internal successors, (64), 5 states have internal predecessors, (64), 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) Word has length 64 [2025-03-04 09:39:03,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:39:03,035 INFO L225 Difference]: With dead ends: 1063 [2025-03-04 09:39:03,035 INFO L226 Difference]: Without dead ends: 1063 [2025-03-04 09:39:03,035 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-04 09:39:03,036 INFO L435 NwaCegarLoop]: 926 mSDtfsCounter, 1 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2401 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2025-03-04 09:39:03,036 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2401 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2025-03-04 09:39:03,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2025-03-04 09:39:03,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1063. [2025-03-04 09:39:03,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 702 states have (on average 1.650997150997151) internal successors, (1159), 1056 states have internal predecessors, (1159), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 13 states have call successors, (13) [2025-03-04 09:39:03,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1187 transitions. [2025-03-04 09:39:03,047 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1187 transitions. Word has length 64 [2025-03-04 09:39:03,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:39:03,048 INFO L471 AbstractCegarLoop]: Abstraction has 1063 states and 1187 transitions. [2025-03-04 09:39:03,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.0) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 09:39:03,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1187 transitions. [2025-03-04 09:39:03,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-03-04 09:39:03,048 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:39:03,048 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:39:03,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-04 09:39:03,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:39:03,249 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr420REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:39:03,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:39:03,249 INFO L85 PathProgramCache]: Analyzing trace with hash -754591, now seen corresponding path program 1 times [2025-03-04 09:39:03,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:39:03,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823246309] [2025-03-04 09:39:03,250 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:39:03,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:39:03,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:39:03,255 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:39:03,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-04 09:39:03,366 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 72 statements into 1 equivalence classes. [2025-03-04 09:39:03,425 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 72 of 72 statements. [2025-03-04 09:39:03,425 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:39:03,425 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:39:03,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-04 09:39:03,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:39:03,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-04 09:39:03,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2025-03-04 09:39:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:39:03,509 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 09:39:03,509 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:39:03,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823246309] [2025-03-04 09:39:03,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823246309] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:39:03,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:39:03,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-04 09:39:03,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302514923] [2025-03-04 09:39:03,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:39:03,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-04 09:39:03,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:39:03,511 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-04 09:39:03,511 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-04 09:39:03,512 INFO L87 Difference]: Start difference. First operand 1063 states and 1187 transitions. Second operand has 7 states, 5 states have (on average 14.0) internal successors, (70), 6 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-04 09:39:05,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:39:05,093 INFO L93 Difference]: Finished difference Result 1075 states and 1202 transitions. [2025-03-04 09:39:05,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-04 09:39:05,093 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 14.0) internal successors, (70), 6 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2025-03-04 09:39:05,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:39:05,096 INFO L225 Difference]: With dead ends: 1075 [2025-03-04 09:39:05,096 INFO L226 Difference]: Without dead ends: 1075 [2025-03-04 09:39:05,096 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2025-03-04 09:39:05,097 INFO L435 NwaCegarLoop]: 911 mSDtfsCounter, 13 mSDsluCounter, 2489 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3400 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2025-03-04 09:39:05,098 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3400 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2025-03-04 09:39:05,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2025-03-04 09:39:05,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 1069. [2025-03-04 09:39:05,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 707 states have (on average 1.6492220650636493) internal successors, (1166), 1061 states have internal predecessors, (1166), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (16), 6 states have call predecessors, (16), 13 states have call successors, (16) [2025-03-04 09:39:05,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1197 transitions. [2025-03-04 09:39:05,109 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1197 transitions. Word has length 72 [2025-03-04 09:39:05,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:39:05,109 INFO L471 AbstractCegarLoop]: Abstraction has 1069 states and 1197 transitions. [2025-03-04 09:39:05,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 14.0) internal successors, (70), 6 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-04 09:39:05,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1197 transitions. [2025-03-04 09:39:05,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2025-03-04 09:39:05,110 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:39:05,110 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:39:05,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-04 09:39:05,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:39:05,311 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr421REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:39:05,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:39:05,311 INFO L85 PathProgramCache]: Analyzing trace with hash -754590, now seen corresponding path program 1 times [2025-03-04 09:39:05,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:39:05,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588029199] [2025-03-04 09:39:05,312 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:39:05,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:39:05,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:39:05,314 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:39:05,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-04 09:39:05,426 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 72 statements into 1 equivalence classes. [2025-03-04 09:39:05,488 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 72 of 72 statements. [2025-03-04 09:39:05,488 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:39:05,488 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:39:05,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 09:39:05,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:39:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:39:05,512 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 09:39:05,512 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:39:05,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588029199] [2025-03-04 09:39:05,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588029199] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 09:39:05,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 09:39:05,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 09:39:05,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931052488] [2025-03-04 09:39:05,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 09:39:05,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 09:39:05,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:39:05,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 09:39:05,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 09:39:05,513 INFO L87 Difference]: Start difference. First operand 1069 states and 1197 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-04 09:39:05,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:39:05,543 INFO L93 Difference]: Finished difference Result 1066 states and 1191 transitions. [2025-03-04 09:39:05,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 09:39:05,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2025-03-04 09:39:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:39:05,546 INFO L225 Difference]: With dead ends: 1066 [2025-03-04 09:39:05,547 INFO L226 Difference]: Without dead ends: 1066 [2025-03-04 09:39:05,547 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 09:39:05,547 INFO L435 NwaCegarLoop]: 926 mSDtfsCounter, 0 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2773 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-04 09:39:05,547 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2773 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-04 09:39:05,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2025-03-04 09:39:05,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1066. [2025-03-04 09:39:05,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 704 states have (on average 1.6505681818181819) internal successors, (1162), 1059 states have internal predecessors, (1162), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 13 states have call successors, (14) [2025-03-04 09:39:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1191 transitions. [2025-03-04 09:39:05,562 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1191 transitions. Word has length 72 [2025-03-04 09:39:05,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:39:05,562 INFO L471 AbstractCegarLoop]: Abstraction has 1066 states and 1191 transitions. [2025-03-04 09:39:05,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-04 09:39:05,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1191 transitions. [2025-03-04 09:39:05,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2025-03-04 09:39:05,562 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:39:05,562 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:39:05,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-04 09:39:05,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:39:05,763 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr420REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:39:05,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:39:05,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2118112786, now seen corresponding path program 1 times [2025-03-04 09:39:05,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:39:05,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963232678] [2025-03-04 09:39:05,764 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:39:05,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:39:05,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:39:05,766 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:39:05,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-04 09:39:05,887 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 73 statements into 1 equivalence classes. [2025-03-04 09:39:05,955 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 73 of 73 statements. [2025-03-04 09:39:05,955 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:39:05,955 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:39:05,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-04 09:39:05,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:39:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:39:05,983 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 09:39:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:39:06,022 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:39:06,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963232678] [2025-03-04 09:39:06,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963232678] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 09:39:06,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 09:39:06,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2025-03-04 09:39:06,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763840087] [2025-03-04 09:39:06,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 09:39:06,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-04 09:39:06,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:39:06,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-04 09:39:06,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2025-03-04 09:39:06,023 INFO L87 Difference]: Start difference. First operand 1066 states and 1191 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 09:39:06,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:39:06,129 INFO L93 Difference]: Finished difference Result 1078 states and 1208 transitions. [2025-03-04 09:39:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 09:39:06,130 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 73 [2025-03-04 09:39:06,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:39:06,132 INFO L225 Difference]: With dead ends: 1078 [2025-03-04 09:39:06,132 INFO L226 Difference]: Without dead ends: 1078 [2025-03-04 09:39:06,132 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2025-03-04 09:39:06,132 INFO L435 NwaCegarLoop]: 926 mSDtfsCounter, 7 mSDsluCounter, 4611 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 5537 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 09:39:06,133 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 5537 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 09:39:06,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2025-03-04 09:39:06,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 1076. [2025-03-04 09:39:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 713 states have (on average 1.6507713884992987) internal successors, (1177), 1068 states have internal predecessors, (1177), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 13 states have call successors, (14) [2025-03-04 09:39:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 1206 transitions. [2025-03-04 09:39:06,146 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 1206 transitions. Word has length 73 [2025-03-04 09:39:06,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:39:06,146 INFO L471 AbstractCegarLoop]: Abstraction has 1076 states and 1206 transitions. [2025-03-04 09:39:06,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 09:39:06,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 1206 transitions. [2025-03-04 09:39:06,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2025-03-04 09:39:06,149 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:39:06,149 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:39:06,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-04 09:39:06,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:39:06,355 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr420REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:39:06,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:39:06,355 INFO L85 PathProgramCache]: Analyzing trace with hash -331745375, now seen corresponding path program 2 times [2025-03-04 09:39:06,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:39:06,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124417654] [2025-03-04 09:39:06,356 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 09:39:06,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:39:06,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:39:06,357 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:39:06,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-04 09:39:06,488 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 76 statements into 2 equivalence classes. [2025-03-04 09:39:26,035 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 76 of 76 statements. [2025-03-04 09:39:26,035 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 09:39:26,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:39:26,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-04 09:39:26,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:39:26,120 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-03-04 09:39:26,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2025-03-04 09:39:26,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2025-03-04 09:39:26,229 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2025-03-04 09:39:26,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2025-03-04 09:39:26,250 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 33 treesize of output 15 [2025-03-04 09:39:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-04 09:39:26,262 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 09:39:26,311 INFO L349 Elim1Store]: treesize reduction 7, result has 63.2 percent of original size [2025-03-04 09:39:26,311 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 25 treesize of output 24 [2025-03-04 09:39:26,338 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:39:26,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124417654] [2025-03-04 09:39:26,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124417654] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 09:39:26,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1543461697] [2025-03-04 09:39:26,338 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 09:39:26,338 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2025-03-04 09:39:26,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2025-03-04 09:39:26,352 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2025-03-04 09:39:26,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2025-03-04 09:39:26,532 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 76 statements into 2 equivalence classes. [2025-03-04 09:39:27,269 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 76 of 76 statements. [2025-03-04 09:39:27,269 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 09:39:27,269 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:39:27,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-04 09:39:27,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:39:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:39:27,380 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 09:39:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:39:27,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1543461697] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 09:39:27,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 09:39:27,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2025-03-04 09:39:27,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899316459] [2025-03-04 09:39:27,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 09:39:27,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-04 09:39:27,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:39:27,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-04 09:39:27,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=554, Unknown=5, NotChecked=0, Total=650 [2025-03-04 09:39:27,528 INFO L87 Difference]: Start difference. First operand 1076 states and 1206 transitions. Second operand has 24 states, 23 states have (on average 6.043478260869565) internal successors, (139), 23 states have internal predecessors, (139), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-04 09:39:33,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:39:33,132 INFO L93 Difference]: Finished difference Result 1092 states and 1229 transitions. [2025-03-04 09:39:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-04 09:39:33,133 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 6.043478260869565) internal successors, (139), 23 states have internal predecessors, (139), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 76 [2025-03-04 09:39:33,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:39:33,134 INFO L225 Difference]: With dead ends: 1092 [2025-03-04 09:39:33,135 INFO L226 Difference]: Without dead ends: 1088 [2025-03-04 09:39:33,135 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=416, Invalid=2333, Unknown=7, NotChecked=0, Total=2756 [2025-03-04 09:39:33,135 INFO L435 NwaCegarLoop]: 618 mSDtfsCounter, 708 mSDsluCounter, 8547 mSDsCounter, 0 mSdLazyCounter, 6177 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 9165 SdHoareTripleChecker+Invalid, 6211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 6177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2025-03-04 09:39:33,135 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 9165 Invalid, 6211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 6177 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2025-03-04 09:39:33,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2025-03-04 09:39:33,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 1084. [2025-03-04 09:39:33,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 722 states have (on average 1.6454293628808865) internal successors, (1188), 1076 states have internal predecessors, (1188), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 13 states have call successors, (14) [2025-03-04 09:39:33,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1217 transitions. [2025-03-04 09:39:33,145 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1217 transitions. Word has length 76 [2025-03-04 09:39:33,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:39:33,146 INFO L471 AbstractCegarLoop]: Abstraction has 1084 states and 1217 transitions. [2025-03-04 09:39:33,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 6.043478260869565) internal successors, (139), 23 states have internal predecessors, (139), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-04 09:39:33,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1217 transitions. [2025-03-04 09:39:33,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2025-03-04 09:39:33,146 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:39:33,146 INFO L218 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:39:33,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2025-03-04 09:39:33,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-04 09:39:33,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:39:33,547 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr421REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:39:33,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:39:33,548 INFO L85 PathProgramCache]: Analyzing trace with hash -422976382, now seen corresponding path program 1 times [2025-03-04 09:39:33,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:39:33,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416255740] [2025-03-04 09:39:33,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 09:39:33,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:39:33,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:39:33,550 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:39:33,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-04 09:39:33,685 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 82 statements into 1 equivalence classes. [2025-03-04 09:39:33,759 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 82 of 82 statements. [2025-03-04 09:39:33,759 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 09:39:33,759 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 09:39:33,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-04 09:39:33,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 09:39:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:39:33,855 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 09:39:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 09:39:34,187 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-04 09:39:34,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416255740] [2025-03-04 09:39:34,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416255740] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 09:39:34,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-04 09:39:34,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2025-03-04 09:39:34,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925455160] [2025-03-04 09:39:34,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-04 09:39:34,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-04 09:39:34,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-04 09:39:34,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-04 09:39:34,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2025-03-04 09:39:34,188 INFO L87 Difference]: Start difference. First operand 1084 states and 1217 transitions. Second operand has 26 states, 26 states have (on average 3.576923076923077) internal successors, (93), 26 states have internal predecessors, (93), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 09:39:35,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 09:39:35,193 INFO L93 Difference]: Finished difference Result 1108 states and 1256 transitions. [2025-03-04 09:39:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-04 09:39:35,194 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.576923076923077) internal successors, (93), 26 states have internal predecessors, (93), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 82 [2025-03-04 09:39:35,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 09:39:35,196 INFO L225 Difference]: With dead ends: 1108 [2025-03-04 09:39:35,196 INFO L226 Difference]: Without dead ends: 1102 [2025-03-04 09:39:35,196 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=728, Invalid=1434, Unknown=0, NotChecked=0, Total=2162 [2025-03-04 09:39:35,197 INFO L435 NwaCegarLoop]: 926 mSDtfsCounter, 16 mSDsluCounter, 11074 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 12000 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-03-04 09:39:35,197 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 12000 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-03-04 09:39:35,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2025-03-04 09:39:35,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 1102. [2025-03-04 09:39:35,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 740 states have (on average 1.6364864864864865) internal successors, (1211), 1094 states have internal predecessors, (1211), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 13 states have call successors, (14) [2025-03-04 09:39:35,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1240 transitions. [2025-03-04 09:39:35,206 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1240 transitions. Word has length 82 [2025-03-04 09:39:35,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 09:39:35,206 INFO L471 AbstractCegarLoop]: Abstraction has 1102 states and 1240 transitions. [2025-03-04 09:39:35,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.576923076923077) internal successors, (93), 26 states have internal predecessors, (93), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2025-03-04 09:39:35,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1240 transitions. [2025-03-04 09:39:35,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2025-03-04 09:39:35,207 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 09:39:35,207 INFO L218 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 09:39:35,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-03-04 09:39:35,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:39:35,407 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr421REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 526 more)] === [2025-03-04 09:39:35,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 09:39:35,408 INFO L85 PathProgramCache]: Analyzing trace with hash 450905666, now seen corresponding path program 2 times [2025-03-04 09:39:35,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-04 09:39:35,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146868393] [2025-03-04 09:39:35,408 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 09:39:35,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 09:39:35,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 09:39:35,411 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-04 09:39:35,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-04 09:39:35,566 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 94 statements into 2 equivalence classes.