./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB --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 bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:40:24,344 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:40:24,419 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 04:40:24,428 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:40:24,431 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:40:24,463 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:40:24,464 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:40:24,464 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:40:24,464 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:40:24,464 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:40:24,465 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:40:24,465 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:40:24,465 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:40:24,465 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:40:24,465 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:40:24,465 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:40:24,466 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:40:24,466 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:40:24,466 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:40:24,466 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:40:24,466 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 04:40:24,466 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 04:40:24,467 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 04:40:24,467 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:40:24,467 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:40:24,467 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 04:40:24,467 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:40:24,467 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:40:24,467 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:40:24,468 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:40:24,468 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:40:24,468 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:40:24,468 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:40:24,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:40:24,468 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:40:24,468 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:40:24,469 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:40:24,469 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:40:24,469 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:40:24,469 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:40:24,469 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:40:24,469 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:40:24,469 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:40:24,469 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:40:24,470 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:40:24,470 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:40:24,470 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:40:24,470 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB 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 -> bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 [2024-11-28 04:40:24,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:40:24,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:40:24,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:40:24,726 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:40:24,726 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:40:24,728 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2024-11-28 04:40:27,847 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/data/e4873e859/b2fe28c2cb384992981eb36d4c77a97b/FLAGfceea4531 [2024-11-28 04:40:28,169 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:40:28,170 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2024-11-28 04:40:28,185 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/data/e4873e859/b2fe28c2cb384992981eb36d4c77a97b/FLAGfceea4531 [2024-11-28 04:40:28,199 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/data/e4873e859/b2fe28c2cb384992981eb36d4c77a97b [2024-11-28 04:40:28,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:40:28,203 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:40:28,205 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:40:28,205 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:40:28,210 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:40:28,211 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:40:28" (1/1) ... [2024-11-28 04:40:28,211 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c3646da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:40:28, skipping insertion in model container [2024-11-28 04:40:28,212 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:40:28" (1/1) ... [2024-11-28 04:40:28,264 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:40:28,567 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 04:40:28,615 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 04:40:28,625 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 04:40:28,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:40:28,644 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-11-28 04:40:28,645 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@446c3225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:40:28, skipping insertion in model container [2024-11-28 04:40:28,645 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:40:28,646 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-11-28 04:40:28,648 INFO L158 Benchmark]: Toolchain (without parser) took 443.59ms. Allocated memory is still 117.4MB. Free memory was 91.5MB in the beginning and 77.4MB in the end (delta: 14.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 04:40:28,648 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 117.4MB. Free memory is still 73.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:40:28,648 INFO L158 Benchmark]: CACSL2BoogieTranslator took 440.70ms. Allocated memory is still 117.4MB. Free memory was 91.5MB in the beginning and 77.4MB in the end (delta: 14.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 04:40:28,650 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 117.4MB. Free memory is still 73.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 440.70ms. Allocated memory is still 117.4MB. Free memory was 91.5MB in the beginning and 77.4MB in the end (delta: 14.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 607]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB --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 bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:40:31,097 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:40:31,213 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-28 04:40:31,224 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:40:31,224 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:40:31,248 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:40:31,249 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:40:31,249 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:40:31,250 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:40:31,250 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:40:31,250 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:40:31,250 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:40:31,250 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:40:31,251 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:40:31,251 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:40:31,251 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:40:31,251 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:40:31,251 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:40:31,251 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:40:31,251 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:40:31,252 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 04:40:31,252 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 04:40:31,252 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 04:40:31,252 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:40:31,252 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:40:31,252 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-28 04:40:31,252 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-28 04:40:31,253 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 04:40:31,253 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:40:31,253 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:40:31,253 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:40:31,253 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:40:31,253 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:40:31,254 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:40:31,254 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:40:31,254 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:40:31,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:40:31,254 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:40:31,254 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:40:31,254 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:40:31,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:40:31,255 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:40:31,255 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:40:31,255 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-28 04:40:31,255 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-28 04:40:31,255 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:40:31,256 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:40:31,256 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:40:31,256 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:40:31,256 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB 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 -> bb0a504b43b0de742fcc89ebbe9d313056bb1824edece6c56238a649b6f48626 [2024-11-28 04:40:31,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:40:31,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:40:31,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:40:31,593 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:40:31,594 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:40:31,595 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2024-11-28 04:40:34,640 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/data/e3139efaf/ac136145ba5e4178a8c2047fae5698e9/FLAGc627d8033 [2024-11-28 04:40:35,017 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:40:35,018 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/sv-benchmarks/c/ldv-memsafety/memleaks_test17_2-2.i [2024-11-28 04:40:35,041 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/data/e3139efaf/ac136145ba5e4178a8c2047fae5698e9/FLAGc627d8033 [2024-11-28 04:40:35,225 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/data/e3139efaf/ac136145ba5e4178a8c2047fae5698e9 [2024-11-28 04:40:35,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:40:35,232 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:40:35,233 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:40:35,233 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:40:35,238 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:40:35,239 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:40:35" (1/1) ... [2024-11-28 04:40:35,241 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7041452d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:40:35, skipping insertion in model container [2024-11-28 04:40:35,241 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:40:35" (1/1) ... [2024-11-28 04:40:35,292 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:40:35,614 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 04:40:35,667 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 04:40:35,675 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 04:40:35,679 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:40:35,697 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-28 04:40:35,707 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:40:35,755 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 04:40:35,794 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 04:40:35,804 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 04:40:35,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:40:35,812 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:40:35,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:40:35,934 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:40:35,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:40:35 WrapperNode [2024-11-28 04:40:35,935 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:40:35,936 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:40:35,936 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:40:35,937 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:40:35,944 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:40:35" (1/1) ... [2024-11-28 04:40:35,963 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:40:35" (1/1) ... [2024-11-28 04:40:35,989 INFO L138 Inliner]: procedures = 167, calls = 80, calls flagged for inlining = 24, calls inlined = 6, statements flattened = 95 [2024-11-28 04:40:35,989 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:40:35,990 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:40:35,990 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:40:35,990 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:40:35,998 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:40:35" (1/1) ... [2024-11-28 04:40:35,998 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:40:35" (1/1) ... [2024-11-28 04:40:36,002 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:40:35" (1/1) ... [2024-11-28 04:40:36,019 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-28 04:40:36,020 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:40:35" (1/1) ... [2024-11-28 04:40:36,020 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:40:35" (1/1) ... [2024-11-28 04:40:36,029 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:40:35" (1/1) ... [2024-11-28 04:40:36,030 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:40:35" (1/1) ... [2024-11-28 04:40:36,033 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:40:35" (1/1) ... [2024-11-28 04:40:36,035 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:40:35" (1/1) ... [2024-11-28 04:40:36,036 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:40:35" (1/1) ... [2024-11-28 04:40:36,039 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:40:36,040 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:40:36,040 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:40:36,040 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:40:36,041 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:40:35" (1/1) ... [2024-11-28 04:40:36,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:40:36,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:36,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:40:36,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:40:36,110 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2024-11-28 04:40:36,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2024-11-28 04:40:36,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 04:40:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:40:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-28 04:40:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-28 04:40:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-28 04:40:36,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-28 04:40:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 04:40:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-28 04:40:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-28 04:40:36,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:40:36,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:40:36,260 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:40:36,262 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:40:36,589 INFO L? ?]: Removed 61 outVars from TransFormulas that were not future-live. [2024-11-28 04:40:36,589 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:40:36,606 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:40:36,606 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 04:40:36,607 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:40:36 BoogieIcfgContainer [2024-11-28 04:40:36,607 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:40:36,610 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:40:36,611 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:40:36,616 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:40:36,616 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:40:35" (1/3) ... [2024-11-28 04:40:36,616 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb82638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:40:36, skipping insertion in model container [2024-11-28 04:40:36,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:40:35" (2/3) ... [2024-11-28 04:40:36,617 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bb82638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:40:36, skipping insertion in model container [2024-11-28 04:40:36,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:40:36" (3/3) ... [2024-11-28 04:40:36,619 INFO L128 eAbstractionObserver]: Analyzing ICFG memleaks_test17_2-2.i [2024-11-28 04:40:36,633 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:40:36,635 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG memleaks_test17_2-2.i that has 2 procedures, 66 locations, 1 initial locations, 4 loop locations, and 20 error locations. [2024-11-28 04:40:36,676 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:40:36,688 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;@618e49c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:40:36,688 INFO L334 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2024-11-28 04:40:36,692 INFO L276 IsEmpty]: Start isEmpty. Operand has 66 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 62 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:40:36,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 04:40:36,698 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:36,699 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:36,699 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:40:36,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:36,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1629542616, now seen corresponding path program 1 times [2024-11-28 04:40:36,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:36,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366436325] [2024-11-28 04:40:36,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:36,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:36,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:36,722 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:36,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:40:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:36,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 04:40:36,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:36,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:40:36,866 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:40:36,867 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:36,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366436325] [2024-11-28 04:40:36,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366436325] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:40:36,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:40:36,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:40:36,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611526494] [2024-11-28 04:40:36,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:40:36,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 04:40:36,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:36,902 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 04:40:36,904 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:40:36,906 INFO L87 Difference]: Start difference. First operand has 66 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 62 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2024-11-28 04:40:36,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:36,929 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2024-11-28 04:40:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 04:40:36,931 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 14 [2024-11-28 04:40:36,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:36,937 INFO L225 Difference]: With dead ends: 66 [2024-11-28 04:40:36,938 INFO L226 Difference]: Without dead ends: 64 [2024-11-28 04:40:36,940 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:40:36,946 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:36,948 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:40:36,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-28 04:40:36,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-11-28 04:40:36,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 60 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:40:37,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2024-11-28 04:40:37,001 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 14 [2024-11-28 04:40:37,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:37,002 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2024-11-28 04:40:37,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2024-11-28 04:40:37,002 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2024-11-28 04:40:37,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 04:40:37,004 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:37,004 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:37,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:40:37,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:37,209 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:40:37,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:37,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2022569626, now seen corresponding path program 1 times [2024-11-28 04:40:37,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:37,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533362924] [2024-11-28 04:40:37,212 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:37,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:37,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:37,214 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:37,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:40:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:37,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:40:37,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:37,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:40:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:40:37,447 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:40:37,447 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:37,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533362924] [2024-11-28 04:40:37,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533362924] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:40:37,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:40:37,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:40:37,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132919966] [2024-11-28 04:40:37,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:40:37,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:40:37,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:37,450 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:40:37,450 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:40:37,450 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-11-28 04:40:37,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:37,724 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2024-11-28 04:40:37,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:40:37,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2024-11-28 04:40:37,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:37,728 INFO L225 Difference]: With dead ends: 90 [2024-11-28 04:40:37,729 INFO L226 Difference]: Without dead ends: 90 [2024-11-28 04:40:37,729 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:40:37,732 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 22 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:37,732 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 178 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:40:37,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-28 04:40:37,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2024-11-28 04:40:37,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 55 states have (on average 1.6181818181818182) internal successors, (89), 74 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:40:37,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2024-11-28 04:40:37,750 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 14 [2024-11-28 04:40:37,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:37,750 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2024-11-28 04:40:37,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-11-28 04:40:37,750 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2024-11-28 04:40:37,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 04:40:37,751 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:37,751 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:37,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:40:37,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:37,952 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:40:37,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:37,952 INFO L85 PathProgramCache]: Analyzing trace with hash -2022569625, now seen corresponding path program 1 times [2024-11-28 04:40:37,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:37,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461167983] [2024-11-28 04:40:37,953 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:37,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:37,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:37,958 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:37,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:40:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:38,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 04:40:38,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:38,124 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 [2024-11-28 04:40:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:40:38,485 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:40:38,485 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:38,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461167983] [2024-11-28 04:40:38,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461167983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:40:38,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:40:38,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-28 04:40:38,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622667929] [2024-11-28 04:40:38,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:40:38,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 04:40:38,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:38,487 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 04:40:38,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:40:38,488 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 10 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 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) [2024-11-28 04:40:39,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:39,161 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2024-11-28 04:40:39,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:40:39,162 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 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 14 [2024-11-28 04:40:39,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:39,164 INFO L225 Difference]: With dead ends: 106 [2024-11-28 04:40:39,164 INFO L226 Difference]: Without dead ends: 106 [2024-11-28 04:40:39,165 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:40:39,165 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 69 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:39,166 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 459 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:40:39,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-28 04:40:39,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 98. [2024-11-28 04:40:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 74 states have (on average 1.5945945945945945) internal successors, (118), 93 states have internal predecessors, (118), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:40:39,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 124 transitions. [2024-11-28 04:40:39,182 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 124 transitions. Word has length 14 [2024-11-28 04:40:39,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:39,182 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 124 transitions. [2024-11-28 04:40:39,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 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) [2024-11-28 04:40:39,182 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 124 transitions. [2024-11-28 04:40:39,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 04:40:39,183 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:39,183 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:39,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:40:39,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:39,384 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:40:39,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:39,384 INFO L85 PathProgramCache]: Analyzing trace with hash -2022469464, now seen corresponding path program 1 times [2024-11-28 04:40:39,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:39,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275134647] [2024-11-28 04:40:39,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:39,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:39,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:39,387 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:39,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:40:39,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:39,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 04:40:39,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:40:39,503 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:40:39,503 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:39,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275134647] [2024-11-28 04:40:39,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275134647] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:40:39,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:40:39,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:40:39,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689639922] [2024-11-28 04:40:39,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:40:39,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:40:39,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:39,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:40:39,504 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:40:39,505 INFO L87 Difference]: Start difference. First operand 98 states and 124 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-11-28 04:40:39,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:39,607 INFO L93 Difference]: Finished difference Result 141 states and 175 transitions. [2024-11-28 04:40:39,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:40:39,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2024-11-28 04:40:39,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:39,608 INFO L225 Difference]: With dead ends: 141 [2024-11-28 04:40:39,608 INFO L226 Difference]: Without dead ends: 141 [2024-11-28 04:40:39,609 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:40:39,609 INFO L435 NwaCegarLoop]: 113 mSDtfsCounter, 49 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:39,609 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 394 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:40:39,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-28 04:40:39,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2024-11-28 04:40:39,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 74 states have (on average 1.5810810810810811) internal successors, (117), 93 states have internal predecessors, (117), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:40:39,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 123 transitions. [2024-11-28 04:40:39,617 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 123 transitions. Word has length 14 [2024-11-28 04:40:39,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:39,617 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 123 transitions. [2024-11-28 04:40:39,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-11-28 04:40:39,618 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 123 transitions. [2024-11-28 04:40:39,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 04:40:39,618 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:39,618 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:39,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 04:40:39,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:39,824 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:40:39,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:39,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1135065945, now seen corresponding path program 1 times [2024-11-28 04:40:39,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:39,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792042878] [2024-11-28 04:40:39,825 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:39,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:39,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:39,828 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:39,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:40:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:39,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:40:39,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:40:39,954 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:40:39,954 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:39,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792042878] [2024-11-28 04:40:39,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792042878] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:40:39,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:40:39,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:40:39,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033392907] [2024-11-28 04:40:39,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:40:39,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:40:39,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:39,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:40:39,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:40:39,956 INFO L87 Difference]: Start difference. First operand 98 states and 123 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-11-28 04:40:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:40,014 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2024-11-28 04:40:40,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:40:40,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2024-11-28 04:40:40,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:40,016 INFO L225 Difference]: With dead ends: 84 [2024-11-28 04:40:40,016 INFO L226 Difference]: Without dead ends: 84 [2024-11-28 04:40:40,016 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:40:40,017 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:40,017 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 271 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:40:40,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-28 04:40:40,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-28 04:40:40,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 79 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:40:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2024-11-28 04:40:40,023 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 14 [2024-11-28 04:40:40,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:40,023 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2024-11-28 04:40:40,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-11-28 04:40:40,023 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2024-11-28 04:40:40,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-28 04:40:40,024 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:40,024 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:40,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 04:40:40,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:40,229 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:40:40,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:40,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1134965783, now seen corresponding path program 1 times [2024-11-28 04:40:40,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:40,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449312558] [2024-11-28 04:40:40,229 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:40,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:40,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:40,231 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:40,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:40:40,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:40,299 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 04:40:40,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:40:40,333 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:40:40,333 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:40,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449312558] [2024-11-28 04:40:40,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449312558] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:40:40,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:40:40,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:40:40,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967389139] [2024-11-28 04:40:40,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:40:40,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:40:40,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:40,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:40:40,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:40:40,334 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-11-28 04:40:40,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:40,429 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2024-11-28 04:40:40,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:40:40,430 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), 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 14 [2024-11-28 04:40:40,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:40,431 INFO L225 Difference]: With dead ends: 86 [2024-11-28 04:40:40,431 INFO L226 Difference]: Without dead ends: 82 [2024-11-28 04:40:40,431 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:40:40,432 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 1 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:40,432 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 168 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:40:40,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-28 04:40:40,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-11-28 04:40:40,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 59 states have (on average 1.576271186440678) internal successors, (93), 78 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:40:40,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2024-11-28 04:40:40,437 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 14 [2024-11-28 04:40:40,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:40,438 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2024-11-28 04:40:40,438 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), 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) [2024-11-28 04:40:40,438 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2024-11-28 04:40:40,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-28 04:40:40,438 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:40,438 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:40,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 04:40:40,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:40,639 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:40:40,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:40,639 INFO L85 PathProgramCache]: Analyzing trace with hash -275523864, now seen corresponding path program 1 times [2024-11-28 04:40:40,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:40,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196892330] [2024-11-28 04:40:40,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:40,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:40,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:40,645 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:40,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:40:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:40,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 04:40:40,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:40,794 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 [2024-11-28 04:40:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:40:41,199 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:40:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:40:42,279 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:42,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196892330] [2024-11-28 04:40:42,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196892330] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:40:42,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:40:42,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2024-11-28 04:40:42,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129898678] [2024-11-28 04:40:42,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:40:42,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 04:40:42,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:42,282 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 04:40:42,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:40:42,282 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand has 20 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:40:44,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:44,122 INFO L93 Difference]: Finished difference Result 99 states and 124 transitions. [2024-11-28 04:40:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:40:44,122 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-11-28 04:40:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:44,123 INFO L225 Difference]: With dead ends: 99 [2024-11-28 04:40:44,123 INFO L226 Difference]: Without dead ends: 99 [2024-11-28 04:40:44,124 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2024-11-28 04:40:44,124 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 89 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:44,125 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 519 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 04:40:44,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-28 04:40:44,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2024-11-28 04:40:44,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.5441176470588236) internal successors, (105), 87 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:40:44,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2024-11-28 04:40:44,131 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 17 [2024-11-28 04:40:44,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:44,131 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2024-11-28 04:40:44,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:40:44,132 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2024-11-28 04:40:44,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 04:40:44,132 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:44,133 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] [2024-11-28 04:40:44,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 04:40:44,336 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:44,337 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:40:44,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:44,337 INFO L85 PathProgramCache]: Analyzing trace with hash 42567755, now seen corresponding path program 1 times [2024-11-28 04:40:44,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:44,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621912901] [2024-11-28 04:40:44,337 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:44,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:44,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:44,339 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:44,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:40:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:44,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:40:44,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:44,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:40:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:40:44,487 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:40:44,488 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:44,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621912901] [2024-11-28 04:40:44,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621912901] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:40:44,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:40:44,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:40:44,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923883075] [2024-11-28 04:40:44,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:40:44,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:40:44,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:44,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:40:44,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:40:44,489 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2024-11-28 04:40:44,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:44,709 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2024-11-28 04:40:44,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:40:44,709 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 22 [2024-11-28 04:40:44,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:44,710 INFO L225 Difference]: With dead ends: 100 [2024-11-28 04:40:44,710 INFO L226 Difference]: Without dead ends: 100 [2024-11-28 04:40:44,710 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:40:44,711 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 26 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:44,711 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 207 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:40:44,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-28 04:40:44,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 92. [2024-11-28 04:40:44,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.5507246376811594) internal successors, (107), 88 states have internal predecessors, (107), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:40:44,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2024-11-28 04:40:44,717 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 22 [2024-11-28 04:40:44,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:44,717 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2024-11-28 04:40:44,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2024-11-28 04:40:44,717 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2024-11-28 04:40:44,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 04:40:44,718 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:44,718 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] [2024-11-28 04:40:44,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 04:40:44,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:44,918 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:40:44,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:44,919 INFO L85 PathProgramCache]: Analyzing trace with hash 42567756, now seen corresponding path program 1 times [2024-11-28 04:40:44,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:44,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107274606] [2024-11-28 04:40:44,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:44,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:44,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:44,924 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:44,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:40:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:44,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:40:44,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:40:45,082 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:40:45,082 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:45,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107274606] [2024-11-28 04:40:45,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107274606] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:40:45,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:40:45,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:40:45,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558197664] [2024-11-28 04:40:45,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:40:45,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:40:45,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:45,083 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:40:45,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:40:45,083 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2024-11-28 04:40:45,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:45,172 INFO L93 Difference]: Finished difference Result 84 states and 98 transitions. [2024-11-28 04:40:45,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:40:45,173 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 22 [2024-11-28 04:40:45,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:45,174 INFO L225 Difference]: With dead ends: 84 [2024-11-28 04:40:45,174 INFO L226 Difference]: Without dead ends: 84 [2024-11-28 04:40:45,174 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:40:45,175 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 44 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:45,175 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 229 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:40:45,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-28 04:40:45,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2024-11-28 04:40:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:40:45,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2024-11-28 04:40:45,179 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 22 [2024-11-28 04:40:45,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:45,179 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2024-11-28 04:40:45,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2024-11-28 04:40:45,180 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2024-11-28 04:40:45,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 04:40:45,180 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:45,180 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:45,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 04:40:45,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:45,381 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:40:45,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:45,382 INFO L85 PathProgramCache]: Analyzing trace with hash 847329071, now seen corresponding path program 1 times [2024-11-28 04:40:45,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:45,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815392161] [2024-11-28 04:40:45,382 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:45,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:45,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:45,385 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:45,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:40:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:45,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 04:40:45,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:45,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:40:45,621 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 04:40:45,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 04:40:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:40:45,633 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:40:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:40:53,882 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:53,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815392161] [2024-11-28 04:40:53,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815392161] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:40:53,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:40:53,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2024-11-28 04:40:53,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37737758] [2024-11-28 04:40:53,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:40:53,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:40:53,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:53,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:40:53,884 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=54, Unknown=1, NotChecked=0, Total=72 [2024-11-28 04:40:53,884 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:40:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:54,306 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2024-11-28 04:40:54,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:40:54,306 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-11-28 04:40:54,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:54,307 INFO L225 Difference]: With dead ends: 101 [2024-11-28 04:40:54,307 INFO L226 Difference]: Without dead ends: 101 [2024-11-28 04:40:54,307 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2024-11-28 04:40:54,308 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 63 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:54,308 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 250 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 04:40:54,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-28 04:40:54,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2024-11-28 04:40:54,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 79 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:40:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2024-11-28 04:40:54,312 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 26 [2024-11-28 04:40:54,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:54,312 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2024-11-28 04:40:54,312 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:40:54,312 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2024-11-28 04:40:54,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 04:40:54,313 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:54,313 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:54,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 04:40:54,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:54,514 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:40:54,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:40:54,514 INFO L85 PathProgramCache]: Analyzing trace with hash 847329072, now seen corresponding path program 1 times [2024-11-28 04:40:54,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:40:54,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344444550] [2024-11-28 04:40:54,514 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:54,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:40:54,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:40:54,516 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:40:54,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:40:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:54,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 04:40:54,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:54,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:40:54,681 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 [2024-11-28 04:40:55,509 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2024-11-28 04:40:55,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:40:55,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:40:55,583 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:40:55,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:40:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-28 04:40:55,735 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:40:56,180 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:40:56,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344444550] [2024-11-28 04:40:56,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344444550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:40:56,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [451007247] [2024-11-28 04:40:56,181 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:40:56,181 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:40:56,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:40:56,188 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:40:56,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2024-11-28 04:40:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:40:56,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 04:40:56,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:40:56,356 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 [2024-11-28 04:40:56,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:40:56,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:40:56,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:40:56,797 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:40:56,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:40:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-28 04:40:56,854 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:40:57,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [451007247] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:40:57,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:40:57,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2024-11-28 04:40:57,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559507404] [2024-11-28 04:40:57,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:40:57,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 04:40:57,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:40:57,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 04:40:57,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=227, Unknown=1, NotChecked=30, Total=306 [2024-11-28 04:40:57,707 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:40:59,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:40:59,615 INFO L93 Difference]: Finished difference Result 148 states and 177 transitions. [2024-11-28 04:40:59,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:40:59,616 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2024-11-28 04:40:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:40:59,617 INFO L225 Difference]: With dead ends: 148 [2024-11-28 04:40:59,617 INFO L226 Difference]: Without dead ends: 148 [2024-11-28 04:40:59,617 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=89, Invalid=420, Unknown=1, NotChecked=42, Total=552 [2024-11-28 04:40:59,618 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 143 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:40:59,618 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 584 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 511 Invalid, 0 Unknown, 155 Unchecked, 1.4s Time] [2024-11-28 04:40:59,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-28 04:40:59,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 106. [2024-11-28 04:40:59,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 83 states have (on average 1.4457831325301205) internal successors, (120), 99 states have internal predecessors, (120), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 04:40:59,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2024-11-28 04:40:59,627 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 26 [2024-11-28 04:40:59,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:40:59,628 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2024-11-28 04:40:59,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:40:59,628 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2024-11-28 04:40:59,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 04:40:59,629 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:40:59,629 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:40:59,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2024-11-28 04:40:59,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 04:41:00,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:00,033 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:41:00,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:00,033 INFO L85 PathProgramCache]: Analyzing trace with hash 195840551, now seen corresponding path program 2 times [2024-11-28 04:41:00,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:00,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25722260] [2024-11-28 04:41:00,034 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:41:00,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:00,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:00,035 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:00,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:41:00,127 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:41:00,127 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:41:00,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:41:00,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:00,218 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 [2024-11-28 04:41:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:41:01,055 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:41:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:41:03,859 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:41:03,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25722260] [2024-11-28 04:41:03,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25722260] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:41:03,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:41:03,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2024-11-28 04:41:03,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911560422] [2024-11-28 04:41:03,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:41:03,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 04:41:03,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:41:03,861 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 04:41:03,861 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2024-11-28 04:41:03,862 INFO L87 Difference]: Start difference. First operand 106 states and 131 transitions. Second operand has 28 states, 25 states have (on average 1.84) internal successors, (46), 26 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:41:10,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:10,924 INFO L93 Difference]: Finished difference Result 128 states and 163 transitions. [2024-11-28 04:41:10,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 04:41:10,925 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.84) internal successors, (46), 26 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2024-11-28 04:41:10,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:10,926 INFO L225 Difference]: With dead ends: 128 [2024-11-28 04:41:10,926 INFO L226 Difference]: Without dead ends: 128 [2024-11-28 04:41:10,927 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=411, Invalid=1311, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 04:41:10,928 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 204 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:10,928 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 653 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-28 04:41:10,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-28 04:41:10,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2024-11-28 04:41:10,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 101 states have (on average 1.4257425742574257) internal successors, (144), 117 states have internal predecessors, (144), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 04:41:10,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2024-11-28 04:41:10,934 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 26 [2024-11-28 04:41:10,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:10,934 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2024-11-28 04:41:10,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.84) internal successors, (46), 26 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:41:10,935 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2024-11-28 04:41:10,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-28 04:41:10,936 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:10,936 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:10,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 04:41:11,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:11,140 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:41:11,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:11,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1760598497, now seen corresponding path program 1 times [2024-11-28 04:41:11,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:11,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [742731356] [2024-11-28 04:41:11,141 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:41:11,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:11,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:11,142 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:11,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:41:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:41:11,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 04:41:11,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:41:11,243 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:41:11,244 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:41:11,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742731356] [2024-11-28 04:41:11,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742731356] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:41:11,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:41:11,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:41:11,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326820781] [2024-11-28 04:41:11,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:41:11,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:41:11,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:41:11,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:41:11,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:41:11,245 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 04:41:11,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:11,283 INFO L93 Difference]: Finished difference Result 128 states and 158 transitions. [2024-11-28 04:41:11,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:41:11,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2024-11-28 04:41:11,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:11,285 INFO L225 Difference]: With dead ends: 128 [2024-11-28 04:41:11,285 INFO L226 Difference]: Without dead ends: 128 [2024-11-28 04:41:11,285 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:41:11,286 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 2 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:11,286 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 253 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:41:11,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-28 04:41:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2024-11-28 04:41:11,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 103 states have (on average 1.4077669902912622) internal successors, (145), 118 states have internal predecessors, (145), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 04:41:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 156 transitions. [2024-11-28 04:41:11,291 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 156 transitions. Word has length 28 [2024-11-28 04:41:11,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:11,291 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 156 transitions. [2024-11-28 04:41:11,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 04:41:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 156 transitions. [2024-11-28 04:41:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-28 04:41:11,293 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:11,293 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:11,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 04:41:11,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:11,493 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:41:11,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:11,494 INFO L85 PathProgramCache]: Analyzing trace with hash -17788162, now seen corresponding path program 1 times [2024-11-28 04:41:11,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:11,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704769957] [2024-11-28 04:41:11,494 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:41:11,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:11,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:11,498 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:11,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:41:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:41:11,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:41:11,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:41:11,619 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:41:11,620 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:41:11,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704769957] [2024-11-28 04:41:11,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704769957] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:41:11,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:41:11,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:41:11,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268106467] [2024-11-28 04:41:11,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:41:11,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:41:11,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:41:11,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:41:11,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:41:11,621 INFO L87 Difference]: Start difference. First operand 126 states and 156 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:41:11,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:11,698 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2024-11-28 04:41:11,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:41:11,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-28 04:41:11,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:11,699 INFO L225 Difference]: With dead ends: 138 [2024-11-28 04:41:11,699 INFO L226 Difference]: Without dead ends: 138 [2024-11-28 04:41:11,700 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:41:11,700 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:11,700 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 175 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:41:11,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-28 04:41:11,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2024-11-28 04:41:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 109 states have (on average 1.3944954128440368) internal successors, (152), 124 states have internal predecessors, (152), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 04:41:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 166 transitions. [2024-11-28 04:41:11,706 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 166 transitions. Word has length 28 [2024-11-28 04:41:11,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:11,706 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 166 transitions. [2024-11-28 04:41:11,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:41:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 166 transitions. [2024-11-28 04:41:11,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 04:41:11,709 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:11,709 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:11,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 04:41:11,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:11,914 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:41:11,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:11,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1923232975, now seen corresponding path program 2 times [2024-11-28 04:41:11,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:11,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537752140] [2024-11-28 04:41:11,914 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:41:11,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:11,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:11,916 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:11,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 04:41:12,002 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:41:12,003 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:41:12,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 04:41:12,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:12,066 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 [2024-11-28 04:41:12,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:41:12,893 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2024-11-28 04:41:12,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:41:12,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:41:12,949 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:41:12,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:41:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-28 04:41:13,054 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:41:13,487 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:41:13,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537752140] [2024-11-28 04:41:13,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537752140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:41:13,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1000792543] [2024-11-28 04:41:13,488 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:41:13,488 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:41:13,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:41:13,492 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:41:13,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2024-11-28 04:41:13,649 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:41:13,650 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:41:13,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 04:41:13,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:13,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:41:13,687 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 [2024-11-28 04:41:14,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:41:14,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:41:14,093 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:41:14,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:41:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-28 04:41:14,156 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:41:18,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1000792543] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:41:18,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:41:18,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2024-11-28 04:41:18,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864557455] [2024-11-28 04:41:18,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:41:18,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:41:18,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:41:18,437 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:41:18,437 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=286, Unknown=1, NotChecked=34, Total=380 [2024-11-28 04:41:18,437 INFO L87 Difference]: Start difference. First operand 133 states and 166 transitions. Second operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:41:20,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:20,417 INFO L93 Difference]: Finished difference Result 198 states and 245 transitions. [2024-11-28 04:41:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:41:20,417 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2024-11-28 04:41:20,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:20,419 INFO L225 Difference]: With dead ends: 198 [2024-11-28 04:41:20,419 INFO L226 Difference]: Without dead ends: 198 [2024-11-28 04:41:20,419 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=100, Invalid=503, Unknown=1, NotChecked=46, Total=650 [2024-11-28 04:41:20,420 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 127 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:20,420 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 754 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 732 Invalid, 0 Unknown, 157 Unchecked, 1.6s Time] [2024-11-28 04:41:20,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-28 04:41:20,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 133. [2024-11-28 04:41:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 109 states have (on average 1.3944954128440368) internal successors, (152), 124 states have internal predecessors, (152), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 04:41:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 166 transitions. [2024-11-28 04:41:20,426 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 166 transitions. Word has length 29 [2024-11-28 04:41:20,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:20,426 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 166 transitions. [2024-11-28 04:41:20,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:41:20,427 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 166 transitions. [2024-11-28 04:41:20,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 04:41:20,427 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:20,428 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:20,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2024-11-28 04:41:20,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 04:41:20,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:20,828 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:41:20,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:20,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1643796100, now seen corresponding path program 1 times [2024-11-28 04:41:20,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:20,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707815958] [2024-11-28 04:41:20,830 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:41:20,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:20,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:20,831 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:20,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 04:41:20,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:41:20,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:41:20,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:20,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:41:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:41:21,041 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:41:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:41:21,214 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:41:21,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707815958] [2024-11-28 04:41:21,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707815958] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:41:21,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:41:21,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-11-28 04:41:21,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254661220] [2024-11-28 04:41:21,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:41:21,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:41:21,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:41:21,216 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:41:21,216 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:41:21,216 INFO L87 Difference]: Start difference. First operand 133 states and 166 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:41:21,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:21,576 INFO L93 Difference]: Finished difference Result 150 states and 182 transitions. [2024-11-28 04:41:21,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:41:21,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-11-28 04:41:21,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:21,578 INFO L225 Difference]: With dead ends: 150 [2024-11-28 04:41:21,578 INFO L226 Difference]: Without dead ends: 150 [2024-11-28 04:41:21,578 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:41:21,578 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 40 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:21,579 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 267 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:41:21,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-28 04:41:21,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 134. [2024-11-28 04:41:21,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 110 states have (on average 1.4) internal successors, (154), 125 states have internal predecessors, (154), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 04:41:21,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 168 transitions. [2024-11-28 04:41:21,585 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 168 transitions. Word has length 31 [2024-11-28 04:41:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:21,585 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 168 transitions. [2024-11-28 04:41:21,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:41:21,586 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 168 transitions. [2024-11-28 04:41:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-28 04:41:21,586 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:21,586 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:21,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-28 04:41:21,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:21,787 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:41:21,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:21,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1643796099, now seen corresponding path program 1 times [2024-11-28 04:41:21,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:21,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085177880] [2024-11-28 04:41:21,788 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:41:21,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:21,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:21,789 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:21,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 04:41:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:41:21,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 04:41:21,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:21,919 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 [2024-11-28 04:41:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:41:22,380 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:41:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:41:23,346 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:41:23,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085177880] [2024-11-28 04:41:23,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085177880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:41:23,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:41:23,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2024-11-28 04:41:23,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112808585] [2024-11-28 04:41:23,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:41:23,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 04:41:23,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:41:23,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 04:41:23,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:41:23,347 INFO L87 Difference]: Start difference. First operand 134 states and 168 transitions. Second operand has 20 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:41:24,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:24,982 INFO L93 Difference]: Finished difference Result 185 states and 229 transitions. [2024-11-28 04:41:24,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:41:24,982 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2024-11-28 04:41:24,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:24,984 INFO L225 Difference]: With dead ends: 185 [2024-11-28 04:41:24,984 INFO L226 Difference]: Without dead ends: 185 [2024-11-28 04:41:24,984 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:41:24,984 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 158 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:24,984 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 714 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 04:41:24,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-28 04:41:24,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 151. [2024-11-28 04:41:24,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 127 states have (on average 1.4645669291338583) internal successors, (186), 142 states have internal predecessors, (186), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 04:41:24,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 200 transitions. [2024-11-28 04:41:24,990 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 200 transitions. Word has length 31 [2024-11-28 04:41:24,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:24,990 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 200 transitions. [2024-11-28 04:41:24,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 18 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:41:24,991 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 200 transitions. [2024-11-28 04:41:24,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 04:41:24,991 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:24,992 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:25,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-28 04:41:25,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:25,192 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:41:25,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:25,192 INFO L85 PathProgramCache]: Analyzing trace with hash 944319376, now seen corresponding path program 3 times [2024-11-28 04:41:25,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:25,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798346188] [2024-11-28 04:41:25,193 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:41:25,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:25,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:25,194 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:25,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 04:41:25,273 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:41:25,273 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:41:25,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 04:41:25,276 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:25,327 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 [2024-11-28 04:41:25,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:41:25,952 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2024-11-28 04:41:25,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:41:25,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:41:26,024 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:41:26,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:41:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 2 not checked. [2024-11-28 04:41:26,127 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:41:34,488 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:41:34,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798346188] [2024-11-28 04:41:34,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798346188] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:41:34,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [394713584] [2024-11-28 04:41:34,489 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:41:34,489 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:41:34,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:41:34,490 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:41:34,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2024-11-28 04:41:34,650 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 04:41:34,650 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:41:34,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 04:41:34,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:34,675 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 [2024-11-28 04:41:34,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:41:35,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:41:35,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:41:35,134 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:41:35,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:41:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 2 not checked. [2024-11-28 04:41:35,192 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:41:39,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [394713584] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:41:39,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:41:39,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2024-11-28 04:41:39,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075460612] [2024-11-28 04:41:39,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:41:39,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 04:41:39,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:41:39,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 04:41:39,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=151, Unknown=3, NotChecked=24, Total=210 [2024-11-28 04:41:39,526 INFO L87 Difference]: Start difference. First operand 151 states and 200 transitions. Second operand has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:41:40,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:40,877 INFO L93 Difference]: Finished difference Result 172 states and 220 transitions. [2024-11-28 04:41:40,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:41:40,878 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2024-11-28 04:41:40,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:40,879 INFO L225 Difference]: With dead ends: 172 [2024-11-28 04:41:40,879 INFO L226 Difference]: Without dead ends: 172 [2024-11-28 04:41:40,879 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=76, Invalid=345, Unknown=3, NotChecked=38, Total=462 [2024-11-28 04:41:40,880 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 98 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:40,880 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 482 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 371 Invalid, 0 Unknown, 118 Unchecked, 0.9s Time] [2024-11-28 04:41:40,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-28 04:41:40,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 146. [2024-11-28 04:41:40,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 123 states have (on average 1.4715447154471544) internal successors, (181), 138 states have internal predecessors, (181), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 04:41:40,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 192 transitions. [2024-11-28 04:41:40,885 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 192 transitions. Word has length 32 [2024-11-28 04:41:40,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:40,886 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 192 transitions. [2024-11-28 04:41:40,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:41:40,886 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 192 transitions. [2024-11-28 04:41:40,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 04:41:40,887 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:40,887 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:40,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 04:41:41,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2024-11-28 04:41:41,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 04:41:41,287 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:41:41,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:41,288 INFO L85 PathProgramCache]: Analyzing trace with hash -196442010, now seen corresponding path program 1 times [2024-11-28 04:41:41,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:41,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932324334] [2024-11-28 04:41:41,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:41:41,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:41,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:41,292 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:41,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 04:41:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:41:41,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 04:41:41,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:41:41,598 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:41:41,755 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:41:41,756 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 29 [2024-11-28 04:41:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:41:42,159 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:41:42,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932324334] [2024-11-28 04:41:42,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932324334] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:41:42,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:41:42,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-11-28 04:41:42,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927323632] [2024-11-28 04:41:42,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:41:42,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:41:42,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:41:42,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:41:42,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:41:42,161 INFO L87 Difference]: Start difference. First operand 146 states and 192 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:41:42,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:42,985 INFO L93 Difference]: Finished difference Result 207 states and 280 transitions. [2024-11-28 04:41:42,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:41:42,986 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2024-11-28 04:41:42,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:42,987 INFO L225 Difference]: With dead ends: 207 [2024-11-28 04:41:42,987 INFO L226 Difference]: Without dead ends: 207 [2024-11-28 04:41:42,988 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:41:42,988 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 155 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:42,988 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 335 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:41:42,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-11-28 04:41:42,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 149. [2024-11-28 04:41:42,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 125 states have (on average 1.44) internal successors, (180), 139 states have internal predecessors, (180), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-28 04:41:42,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 197 transitions. [2024-11-28 04:41:42,994 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 197 transitions. Word has length 32 [2024-11-28 04:41:42,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:42,995 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 197 transitions. [2024-11-28 04:41:42,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:41:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 197 transitions. [2024-11-28 04:41:42,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 04:41:42,996 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:42,996 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:43,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 04:41:43,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:43,196 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:41:43,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:43,197 INFO L85 PathProgramCache]: Analyzing trace with hash 581928531, now seen corresponding path program 1 times [2024-11-28 04:41:43,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:43,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453271069] [2024-11-28 04:41:43,197 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:41:43,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:43,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:43,199 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:43,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 04:41:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:41:43,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:41:43,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:43,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:41:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:41:43,648 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:41:43,763 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 14 treesize of output 12 [2024-11-28 04:41:43,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-28 04:41:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:41:43,815 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:41:43,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453271069] [2024-11-28 04:41:43,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453271069] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:41:43,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:41:43,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2024-11-28 04:41:43,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529843774] [2024-11-28 04:41:43,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:41:43,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 04:41:43,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:41:43,816 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 04:41:43,816 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:41:43,817 INFO L87 Difference]: Start difference. First operand 149 states and 197 transitions. Second operand has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:41:44,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:44,399 INFO L93 Difference]: Finished difference Result 187 states and 236 transitions. [2024-11-28 04:41:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:41:44,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2024-11-28 04:41:44,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:44,402 INFO L225 Difference]: With dead ends: 187 [2024-11-28 04:41:44,402 INFO L226 Difference]: Without dead ends: 187 [2024-11-28 04:41:44,402 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:41:44,403 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 77 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:44,403 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 606 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:41:44,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-11-28 04:41:44,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 160. [2024-11-28 04:41:44,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 134 states have (on average 1.4253731343283582) internal successors, (191), 149 states have internal predecessors, (191), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-28 04:41:44,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 208 transitions. [2024-11-28 04:41:44,409 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 208 transitions. Word has length 32 [2024-11-28 04:41:44,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:44,409 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 208 transitions. [2024-11-28 04:41:44,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:41:44,409 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 208 transitions. [2024-11-28 04:41:44,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 04:41:44,410 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:44,410 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:44,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 04:41:44,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:44,611 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:41:44,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:44,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1794734966, now seen corresponding path program 1 times [2024-11-28 04:41:44,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:44,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365891107] [2024-11-28 04:41:44,611 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:41:44,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:44,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:44,614 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:44,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 04:41:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:41:44,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 04:41:44,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:44,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:41:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:41:45,084 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:41:45,182 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 36 treesize of output 32 [2024-11-28 04:41:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:41:45,503 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:41:45,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365891107] [2024-11-28 04:41:45,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365891107] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:41:45,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:41:45,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2024-11-28 04:41:45,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542434645] [2024-11-28 04:41:45,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:41:45,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 04:41:45,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:41:45,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 04:41:45,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:41:45,505 INFO L87 Difference]: Start difference. First operand 160 states and 208 transitions. Second operand has 16 states, 15 states have (on average 3.0) internal successors, (45), 13 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:41:46,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:46,195 INFO L93 Difference]: Finished difference Result 224 states and 292 transitions. [2024-11-28 04:41:46,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:41:46,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 13 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2024-11-28 04:41:46,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:46,197 INFO L225 Difference]: With dead ends: 224 [2024-11-28 04:41:46,197 INFO L226 Difference]: Without dead ends: 224 [2024-11-28 04:41:46,198 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:41:46,198 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 95 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:46,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 469 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:41:46,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-11-28 04:41:46,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 193. [2024-11-28 04:41:46,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 167 states have (on average 1.4850299401197604) internal successors, (248), 181 states have internal predecessors, (248), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-28 04:41:46,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 265 transitions. [2024-11-28 04:41:46,205 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 265 transitions. Word has length 33 [2024-11-28 04:41:46,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:46,206 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 265 transitions. [2024-11-28 04:41:46,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 13 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:41:46,206 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 265 transitions. [2024-11-28 04:41:46,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 04:41:46,206 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:46,207 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:46,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-28 04:41:46,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:46,407 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:41:46,408 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:46,408 INFO L85 PathProgramCache]: Analyzing trace with hash 859915420, now seen corresponding path program 1 times [2024-11-28 04:41:46,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:46,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657200127] [2024-11-28 04:41:46,408 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:41:46,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:46,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:46,410 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:46,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 04:41:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:41:46,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 04:41:46,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:46,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:41:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:41:46,949 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:41:47,131 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 14 treesize of output 12 [2024-11-28 04:41:47,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-28 04:41:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:41:47,225 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:41:47,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657200127] [2024-11-28 04:41:47,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657200127] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:41:47,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:41:47,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2024-11-28 04:41:47,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583630483] [2024-11-28 04:41:47,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:41:47,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:41:47,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:41:47,227 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:41:47,227 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:41:47,227 INFO L87 Difference]: Start difference. First operand 193 states and 265 transitions. Second operand has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:41:51,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:41:55,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:41:56,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:56,163 INFO L93 Difference]: Finished difference Result 223 states and 297 transitions. [2024-11-28 04:41:56,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:41:56,165 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2024-11-28 04:41:56,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:56,166 INFO L225 Difference]: With dead ends: 223 [2024-11-28 04:41:56,166 INFO L226 Difference]: Without dead ends: 223 [2024-11-28 04:41:56,166 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:41:56,167 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 197 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:56,168 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 428 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 319 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2024-11-28 04:41:56,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-28 04:41:56,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 200. [2024-11-28 04:41:56,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 174 states have (on average 1.471264367816092) internal successors, (256), 188 states have internal predecessors, (256), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-28 04:41:56,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 273 transitions. [2024-11-28 04:41:56,175 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 273 transitions. Word has length 33 [2024-11-28 04:41:56,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:56,175 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 273 transitions. [2024-11-28 04:41:56,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:41:56,175 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 273 transitions. [2024-11-28 04:41:56,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 04:41:56,176 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:56,176 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:56,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-28 04:41:56,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:56,377 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:41:56,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:56,377 INFO L85 PathProgramCache]: Analyzing trace with hash 859986854, now seen corresponding path program 1 times [2024-11-28 04:41:56,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:56,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192528470] [2024-11-28 04:41:56,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:41:56,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:56,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:56,379 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:56,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 04:41:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:41:56,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 04:41:56,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:41:56,612 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:41:56,612 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:41:56,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192528470] [2024-11-28 04:41:56,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192528470] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:41:56,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:41:56,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:41:56,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093740944] [2024-11-28 04:41:56,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:41:56,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:41:56,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:41:56,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:41:56,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:41:56,614 INFO L87 Difference]: Start difference. First operand 200 states and 273 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 04:41:56,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:56,701 INFO L93 Difference]: Finished difference Result 205 states and 270 transitions. [2024-11-28 04:41:56,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:41:56,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2024-11-28 04:41:56,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:56,703 INFO L225 Difference]: With dead ends: 205 [2024-11-28 04:41:56,703 INFO L226 Difference]: Without dead ends: 205 [2024-11-28 04:41:56,703 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:41:56,704 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 48 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:56,704 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 198 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:41:56,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-28 04:41:56,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 197. [2024-11-28 04:41:56,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 171 states have (on average 1.4269005847953216) internal successors, (244), 185 states have internal predecessors, (244), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-28 04:41:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 261 transitions. [2024-11-28 04:41:56,710 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 261 transitions. Word has length 33 [2024-11-28 04:41:56,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:56,710 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 261 transitions. [2024-11-28 04:41:56,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 04:41:56,711 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 261 transitions. [2024-11-28 04:41:56,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-28 04:41:56,711 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:56,711 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:56,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 04:41:56,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:56,912 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:41:56,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:56,913 INFO L85 PathProgramCache]: Analyzing trace with hash 197791045, now seen corresponding path program 1 times [2024-11-28 04:41:56,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:56,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108959687] [2024-11-28 04:41:56,913 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:41:56,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:56,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:56,914 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:56,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 04:41:57,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:41:57,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 04:41:57,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:41:57,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:41:57,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-28 04:41:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:41:57,452 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:41:57,582 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 36 treesize of output 32 [2024-11-28 04:41:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:41:57,889 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:41:57,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108959687] [2024-11-28 04:41:57,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108959687] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:41:57,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:41:57,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2024-11-28 04:41:57,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306871015] [2024-11-28 04:41:57,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:41:57,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 04:41:57,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:41:57,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 04:41:57,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:41:57,890 INFO L87 Difference]: Start difference. First operand 197 states and 261 transitions. Second operand has 17 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:41:59,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:41:59,676 INFO L93 Difference]: Finished difference Result 227 states and 286 transitions. [2024-11-28 04:41:59,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:41:59,678 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2024-11-28 04:41:59,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:41:59,678 INFO L225 Difference]: With dead ends: 227 [2024-11-28 04:41:59,678 INFO L226 Difference]: Without dead ends: 227 [2024-11-28 04:41:59,679 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:41:59,679 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 89 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:41:59,679 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 708 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-28 04:41:59,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-11-28 04:41:59,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 203. [2024-11-28 04:41:59,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 177 states have (on average 1.4124293785310735) internal successors, (250), 191 states have internal predecessors, (250), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-28 04:41:59,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 267 transitions. [2024-11-28 04:41:59,686 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 267 transitions. Word has length 34 [2024-11-28 04:41:59,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:41:59,686 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 267 transitions. [2024-11-28 04:41:59,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0) internal successors, (48), 14 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:41:59,687 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 267 transitions. [2024-11-28 04:41:59,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-28 04:41:59,687 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:41:59,687 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:41:59,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-28 04:41:59,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:59,888 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:41:59,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:41:59,888 INFO L85 PathProgramCache]: Analyzing trace with hash -307767580, now seen corresponding path program 1 times [2024-11-28 04:41:59,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:41:59,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037999661] [2024-11-28 04:41:59,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:41:59,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:41:59,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:41:59,890 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:41:59,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 04:41:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:41:59,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:41:59,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:42:00,039 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:42:00,039 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:42:00,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037999661] [2024-11-28 04:42:00,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037999661] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:42:00,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:42:00,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:42:00,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796434843] [2024-11-28 04:42:00,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:42:00,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:42:00,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:42:00,040 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:42:00,040 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:42:00,041 INFO L87 Difference]: Start difference. First operand 203 states and 267 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 04:42:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:42:00,073 INFO L93 Difference]: Finished difference Result 158 states and 192 transitions. [2024-11-28 04:42:00,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:42:00,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2024-11-28 04:42:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:42:00,074 INFO L225 Difference]: With dead ends: 158 [2024-11-28 04:42:00,074 INFO L226 Difference]: Without dead ends: 158 [2024-11-28 04:42:00,075 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:42:00,075 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:42:00,075 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 260 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:42:00,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-28 04:42:00,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2024-11-28 04:42:00,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 134 states have (on average 1.3507462686567164) internal successors, (181), 148 states have internal predecessors, (181), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 04:42:00,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 192 transitions. [2024-11-28 04:42:00,079 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 192 transitions. Word has length 34 [2024-11-28 04:42:00,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:42:00,079 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 192 transitions. [2024-11-28 04:42:00,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 04:42:00,080 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 192 transitions. [2024-11-28 04:42:00,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 04:42:00,080 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:42:00,080 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:42:00,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-28 04:42:00,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:00,280 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:42:00,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:42:00,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1563466314, now seen corresponding path program 1 times [2024-11-28 04:42:00,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:42:00,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1739359492] [2024-11-28 04:42:00,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:42:00,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:00,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:42:00,285 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:42:00,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 04:42:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:42:00,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:42:00,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:42:00,726 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:42:00,946 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:42:00,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739359492] [2024-11-28 04:42:00,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739359492] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:42:00,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:42:00,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2024-11-28 04:42:00,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160072246] [2024-11-28 04:42:00,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:42:00,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:42:00,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:42:00,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:42:00,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:42:00,948 INFO L87 Difference]: Start difference. First operand 158 states and 192 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:42:01,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:42:01,362 INFO L93 Difference]: Finished difference Result 174 states and 210 transitions. [2024-11-28 04:42:01,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:42:01,365 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 36 [2024-11-28 04:42:01,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:42:01,366 INFO L225 Difference]: With dead ends: 174 [2024-11-28 04:42:01,366 INFO L226 Difference]: Without dead ends: 174 [2024-11-28 04:42:01,366 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:42:01,367 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 62 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:42:01,367 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 524 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:42:01,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-28 04:42:01,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 166. [2024-11-28 04:42:01,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 141 states have (on average 1.3333333333333333) internal successors, (188), 155 states have internal predecessors, (188), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 04:42:01,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 202 transitions. [2024-11-28 04:42:01,375 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 202 transitions. Word has length 36 [2024-11-28 04:42:01,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:42:01,375 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 202 transitions. [2024-11-28 04:42:01,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:42:01,376 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 202 transitions. [2024-11-28 04:42:01,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 04:42:01,376 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:42:01,376 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:42:01,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 04:42:01,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:01,581 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:42:01,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:42:01,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1836555244, now seen corresponding path program 1 times [2024-11-28 04:42:01,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:42:01,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976410865] [2024-11-28 04:42:01,581 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:42:01,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:01,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:42:01,583 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:42:01,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 04:42:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:42:01,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 04:42:01,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:01,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:42:01,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:42:02,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 04:42:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:42:02,092 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:02,210 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 44 treesize of output 40 [2024-11-28 04:42:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:42:02,604 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:42:02,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976410865] [2024-11-28 04:42:02,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976410865] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:42:02,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:42:02,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2024-11-28 04:42:02,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656726995] [2024-11-28 04:42:02,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:42:02,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 04:42:02,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:42:02,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 04:42:02,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:42:02,605 INFO L87 Difference]: Start difference. First operand 166 states and 202 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:42:03,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:42:03,655 INFO L93 Difference]: Finished difference Result 169 states and 205 transitions. [2024-11-28 04:42:03,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:42:03,656 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2024-11-28 04:42:03,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:42:03,657 INFO L225 Difference]: With dead ends: 169 [2024-11-28 04:42:03,657 INFO L226 Difference]: Without dead ends: 169 [2024-11-28 04:42:03,657 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:42:03,657 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 59 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:42:03,657 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 498 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 04:42:03,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-28 04:42:03,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 163. [2024-11-28 04:42:03,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 138 states have (on average 1.3405797101449275) internal successors, (185), 152 states have internal predecessors, (185), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 04:42:03,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 199 transitions. [2024-11-28 04:42:03,662 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 199 transitions. Word has length 35 [2024-11-28 04:42:03,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:42:03,663 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 199 transitions. [2024-11-28 04:42:03,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 14 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:42:03,663 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 199 transitions. [2024-11-28 04:42:03,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 04:42:03,663 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:42:03,663 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:42:03,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 04:42:03,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:03,864 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:42:03,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:42:03,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1739499813, now seen corresponding path program 1 times [2024-11-28 04:42:03,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:42:03,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466940392] [2024-11-28 04:42:03,865 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:42:03,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:03,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:42:03,867 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:42:03,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 04:42:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:42:03,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 04:42:03,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:04,051 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 11 treesize of output 7 [2024-11-28 04:42:04,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 04:42:04,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2024-11-28 04:42:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:42:04,413 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:05,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-11-28 04:42:05,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-28 04:42:05,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2024-11-28 04:42:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:42:05,935 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:42:05,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466940392] [2024-11-28 04:42:05,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466940392] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:42:05,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:42:05,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2024-11-28 04:42:05,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879686396] [2024-11-28 04:42:05,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:42:05,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 04:42:05,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:42:05,936 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 04:42:05,936 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:42:05,936 INFO L87 Difference]: Start difference. First operand 163 states and 199 transitions. Second operand has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:42:10,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:42:14,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:42:15,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:42:15,042 INFO L93 Difference]: Finished difference Result 197 states and 235 transitions. [2024-11-28 04:42:15,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:42:15,043 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 36 [2024-11-28 04:42:15,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:42:15,044 INFO L225 Difference]: With dead ends: 197 [2024-11-28 04:42:15,044 INFO L226 Difference]: Without dead ends: 197 [2024-11-28 04:42:15,044 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:42:15,045 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 170 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:42:15,045 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 551 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 320 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2024-11-28 04:42:15,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-28 04:42:15,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 170. [2024-11-28 04:42:15,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 145 states have (on average 1.3310344827586207) internal successors, (193), 159 states have internal predecessors, (193), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 04:42:15,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 207 transitions. [2024-11-28 04:42:15,050 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 207 transitions. Word has length 36 [2024-11-28 04:42:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:42:15,051 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 207 transitions. [2024-11-28 04:42:15,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:42:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 207 transitions. [2024-11-28 04:42:15,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 04:42:15,052 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:42:15,052 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:42:15,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 04:42:15,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:15,253 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:42:15,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:42:15,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1739499812, now seen corresponding path program 1 times [2024-11-28 04:42:15,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:42:15,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946574674] [2024-11-28 04:42:15,254 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:42:15,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:15,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:42:15,256 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:42:15,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 04:42:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:42:15,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:42:15,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:42:15,704 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:42:15,940 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:42:15,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946574674] [2024-11-28 04:42:15,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946574674] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:42:15,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:42:15,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2024-11-28 04:42:15,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38042162] [2024-11-28 04:42:15,940 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:42:15,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:42:15,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:42:15,941 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:42:15,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:42:15,942 INFO L87 Difference]: Start difference. First operand 170 states and 207 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:42:16,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:42:16,301 INFO L93 Difference]: Finished difference Result 190 states and 227 transitions. [2024-11-28 04:42:16,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 04:42:16,302 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2024-11-28 04:42:16,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:42:16,303 INFO L225 Difference]: With dead ends: 190 [2024-11-28 04:42:16,303 INFO L226 Difference]: Without dead ends: 190 [2024-11-28 04:42:16,303 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:42:16,303 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 86 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:42:16,304 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 356 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:42:16,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-28 04:42:16,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 183. [2024-11-28 04:42:16,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 158 states have (on average 1.3037974683544304) internal successors, (206), 171 states have internal predecessors, (206), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 04:42:16,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 220 transitions. [2024-11-28 04:42:16,309 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 220 transitions. Word has length 36 [2024-11-28 04:42:16,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:42:16,309 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 220 transitions. [2024-11-28 04:42:16,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 15 states have internal predecessors, (53), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:42:16,310 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 220 transitions. [2024-11-28 04:42:16,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 04:42:16,310 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:42:16,310 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:42:16,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 04:42:16,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:16,511 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:42:16,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:42:16,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1589059317, now seen corresponding path program 2 times [2024-11-28 04:42:16,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:42:16,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922243091] [2024-11-28 04:42:16,511 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:42:16,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:16,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:42:16,513 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:42:16,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 04:42:16,625 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:42:16,625 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:42:16,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-28 04:42:16,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:16,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:42:16,689 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 [2024-11-28 04:42:17,471 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2024-11-28 04:42:17,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:42:17,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:42:17,544 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:42:17,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:42:17,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:42:17,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:42:18,001 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:42:18,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:42:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2024-11-28 04:42:18,125 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:18,536 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:42:18,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922243091] [2024-11-28 04:42:18,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922243091] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:42:18,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1430331531] [2024-11-28 04:42:18,536 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:42:18,536 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:42:18,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:42:18,538 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:42:18,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2024-11-28 04:42:18,769 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:42:18,769 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:42:18,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-28 04:42:18,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:18,794 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 [2024-11-28 04:42:18,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:42:19,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:42:19,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:42:19,177 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:42:19,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:42:19,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:42:19,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:42:19,378 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:42:19,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:42:19,413 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2024-11-28 04:42:19,413 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:23,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1430331531] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:42:23,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:42:23,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2024-11-28 04:42:23,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116891105] [2024-11-28 04:42:23,721 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:42:23,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 04:42:23,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:42:23,722 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 04:42:23,722 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=356, Unknown=1, NotChecked=38, Total=462 [2024-11-28 04:42:23,722 INFO L87 Difference]: Start difference. First operand 183 states and 220 transitions. Second operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 04:42:25,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:42:25,891 INFO L93 Difference]: Finished difference Result 211 states and 253 transitions. [2024-11-28 04:42:25,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 04:42:25,892 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2024-11-28 04:42:25,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:42:25,893 INFO L225 Difference]: With dead ends: 211 [2024-11-28 04:42:25,893 INFO L226 Difference]: Without dead ends: 211 [2024-11-28 04:42:25,893 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=123, Invalid=692, Unknown=1, NotChecked=54, Total=870 [2024-11-28 04:42:25,894 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 124 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:42:25,894 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 683 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 739 Invalid, 0 Unknown, 120 Unchecked, 1.6s Time] [2024-11-28 04:42:25,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-11-28 04:42:25,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 195. [2024-11-28 04:42:25,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 168 states have (on average 1.2916666666666667) internal successors, (217), 181 states have internal predecessors, (217), 7 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-28 04:42:25,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 237 transitions. [2024-11-28 04:42:25,899 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 237 transitions. Word has length 39 [2024-11-28 04:42:25,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:42:25,900 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 237 transitions. [2024-11-28 04:42:25,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 04:42:25,900 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 237 transitions. [2024-11-28 04:42:25,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 04:42:25,901 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:42:25,901 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:42:25,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2024-11-28 04:42:26,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 04:42:26,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:26,301 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:42:26,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:42:26,302 INFO L85 PathProgramCache]: Analyzing trace with hash -916968123, now seen corresponding path program 1 times [2024-11-28 04:42:26,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:42:26,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657097691] [2024-11-28 04:42:26,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:42:26,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:26,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:42:26,304 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:42:26,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 04:42:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:42:26,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 04:42:26,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:42:26,544 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:42:26,653 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:42:26,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657097691] [2024-11-28 04:42:26,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657097691] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:42:26,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:42:26,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2024-11-28 04:42:26,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078733082] [2024-11-28 04:42:26,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:42:26,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:42:26,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:42:26,654 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:42:26,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:42:26,654 INFO L87 Difference]: Start difference. First operand 195 states and 237 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:42:26,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:42:26,790 INFO L93 Difference]: Finished difference Result 194 states and 236 transitions. [2024-11-28 04:42:26,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:42:26,790 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-11-28 04:42:26,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:42:26,791 INFO L225 Difference]: With dead ends: 194 [2024-11-28 04:42:26,792 INFO L226 Difference]: Without dead ends: 194 [2024-11-28 04:42:26,792 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:42:26,792 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 61 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:42:26,792 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 149 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:42:26,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-11-28 04:42:26,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2024-11-28 04:42:26,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 168 states have (on average 1.2857142857142858) internal successors, (216), 180 states have internal predecessors, (216), 7 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-28 04:42:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 236 transitions. [2024-11-28 04:42:26,798 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 236 transitions. Word has length 38 [2024-11-28 04:42:26,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:42:26,798 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 236 transitions. [2024-11-28 04:42:26,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 04:42:26,798 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 236 transitions. [2024-11-28 04:42:26,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 04:42:26,799 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:42:26,799 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:42:26,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 04:42:26,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:27,000 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:42:27,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:42:27,000 INFO L85 PathProgramCache]: Analyzing trace with hash -597058147, now seen corresponding path program 2 times [2024-11-28 04:42:27,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:42:27,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156059638] [2024-11-28 04:42:27,000 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:42:27,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:27,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:42:27,002 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:42:27,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 04:42:27,112 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:42:27,112 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:42:27,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 04:42:27,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:27,170 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 [2024-11-28 04:42:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:42:28,045 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:42:29,844 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:42:29,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156059638] [2024-11-28 04:42:29,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156059638] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:42:29,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:42:29,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2024-11-28 04:42:29,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215261953] [2024-11-28 04:42:29,844 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:42:29,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 04:42:29,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:42:29,845 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 04:42:29,845 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2024-11-28 04:42:29,845 INFO L87 Difference]: Start difference. First operand 194 states and 236 transitions. Second operand has 26 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 24 states have internal predecessors, (68), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:42:32,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:42:32,648 INFO L93 Difference]: Finished difference Result 218 states and 262 transitions. [2024-11-28 04:42:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 04:42:32,649 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 24 states have internal predecessors, (68), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2024-11-28 04:42:32,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:42:32,651 INFO L225 Difference]: With dead ends: 218 [2024-11-28 04:42:32,651 INFO L226 Difference]: Without dead ends: 218 [2024-11-28 04:42:32,651 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 04:42:32,652 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 208 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:42:32,652 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 749 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-28 04:42:32,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-28 04:42:32,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 194. [2024-11-28 04:42:32,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 168 states have (on average 1.2857142857142858) internal successors, (216), 180 states have internal predecessors, (216), 7 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-28 04:42:32,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 236 transitions. [2024-11-28 04:42:32,665 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 236 transitions. Word has length 39 [2024-11-28 04:42:32,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:42:32,665 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 236 transitions. [2024-11-28 04:42:32,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 24 states have internal predecessors, (68), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:42:32,666 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 236 transitions. [2024-11-28 04:42:32,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 04:42:32,667 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:42:32,667 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:42:32,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-28 04:42:32,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:32,867 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:42:32,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:42:32,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1638759414, now seen corresponding path program 1 times [2024-11-28 04:42:32,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:42:32,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965896675] [2024-11-28 04:42:32,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:42:32,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:32,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:42:32,870 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:42:32,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 04:42:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:42:32,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:42:32,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:32,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 7 [2024-11-28 04:42:33,123 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 11 treesize of output 7 [2024-11-28 04:42:33,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-28 04:42:33,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 04:42:33,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2024-11-28 04:42:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:42:33,677 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:34,082 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:42:34,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965896675] [2024-11-28 04:42:34,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965896675] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:42:34,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [163301241] [2024-11-28 04:42:34,082 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:42:34,083 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:42:34,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:42:34,085 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:42:34,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2024-11-28 04:42:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:42:34,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 04:42:34,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:34,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 7 [2024-11-28 04:42:34,401 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 11 treesize of output 7 [2024-11-28 04:42:34,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-28 04:42:34,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 04:42:34,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2024-11-28 04:42:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:42:34,772 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:34,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [163301241] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:42:34,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:42:34,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-11-28 04:42:34,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489180071] [2024-11-28 04:42:34,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:42:34,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:42:34,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:42:34,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:42:34,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:42:34,949 INFO L87 Difference]: Start difference. First operand 194 states and 236 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:42:35,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:42:35,630 INFO L93 Difference]: Finished difference Result 212 states and 254 transitions. [2024-11-28 04:42:35,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:42:35,630 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2024-11-28 04:42:35,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:42:35,631 INFO L225 Difference]: With dead ends: 212 [2024-11-28 04:42:35,631 INFO L226 Difference]: Without dead ends: 212 [2024-11-28 04:42:35,631 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:42:35,632 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 35 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:42:35,632 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 317 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:42:35,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-11-28 04:42:35,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 205. [2024-11-28 04:42:35,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 179 states have (on average 1.2681564245810055) internal successors, (227), 191 states have internal predecessors, (227), 7 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-28 04:42:35,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 247 transitions. [2024-11-28 04:42:35,636 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 247 transitions. Word has length 39 [2024-11-28 04:42:35,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:42:35,637 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 247 transitions. [2024-11-28 04:42:35,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:42:35,637 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 247 transitions. [2024-11-28 04:42:35,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-28 04:42:35,638 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:42:35,638 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:42:35,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2024-11-28 04:42:35,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-28 04:42:36,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:36,039 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:42:36,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:42:36,039 INFO L85 PathProgramCache]: Analyzing trace with hash -629853671, now seen corresponding path program 1 times [2024-11-28 04:42:36,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:42:36,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206403252] [2024-11-28 04:42:36,039 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:42:36,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:36,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:42:36,041 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:42:36,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 04:42:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:42:36,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:42:36,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 04:42:36,415 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:36,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2024-11-28 04:42:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 04:42:37,309 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:42:37,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206403252] [2024-11-28 04:42:37,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206403252] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:42:37,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:42:37,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-11-28 04:42:37,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178759184] [2024-11-28 04:42:37,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:42:37,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:42:37,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:42:37,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:42:37,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:42:37,310 INFO L87 Difference]: Start difference. First operand 205 states and 247 transitions. Second operand has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:42:38,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:42:38,836 INFO L93 Difference]: Finished difference Result 210 states and 250 transitions. [2024-11-28 04:42:38,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:42:38,837 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2024-11-28 04:42:38,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:42:38,838 INFO L225 Difference]: With dead ends: 210 [2024-11-28 04:42:38,838 INFO L226 Difference]: Without dead ends: 210 [2024-11-28 04:42:38,838 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:42:38,838 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 80 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:42:38,839 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 712 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 04:42:38,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-11-28 04:42:38,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 202. [2024-11-28 04:42:38,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 177 states have (on average 1.2485875706214689) internal successors, (221), 188 states have internal predecessors, (221), 7 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-28 04:42:38,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 241 transitions. [2024-11-28 04:42:38,844 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 241 transitions. Word has length 41 [2024-11-28 04:42:38,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:42:38,844 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 241 transitions. [2024-11-28 04:42:38,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:42:38,845 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 241 transitions. [2024-11-28 04:42:38,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 04:42:38,845 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:42:38,845 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:42:38,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-28 04:42:39,046 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:39,046 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:42:39,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:42:39,046 INFO L85 PathProgramCache]: Analyzing trace with hash 753988337, now seen corresponding path program 1 times [2024-11-28 04:42:39,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:42:39,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865594453] [2024-11-28 04:42:39,047 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:42:39,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:39,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:42:39,048 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:42:39,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 04:42:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:42:39,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 04:42:39,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:39,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:42:39,394 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:42:39,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:42:39,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:42:39,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-28 04:42:39,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2024-11-28 04:42:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:42:39,752 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:39,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2024-11-28 04:42:40,015 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 38 treesize of output 34 [2024-11-28 04:42:40,392 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:42:40,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865594453] [2024-11-28 04:42:40,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865594453] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:42:40,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [914699748] [2024-11-28 04:42:40,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:42:40,392 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:42:40,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:42:40,394 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:42:40,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2024-11-28 04:42:40,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:42:40,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:42:40,623 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:41,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:42:41,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-28 04:42:42,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [914699748] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:42:42,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:42:42,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 31 [2024-11-28 04:42:42,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086320752] [2024-11-28 04:42:42,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:42:42,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 04:42:42,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:42:42,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 04:42:42,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1144, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 04:42:42,023 INFO L87 Difference]: Start difference. First operand 202 states and 241 transitions. Second operand has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 29 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:42:47,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:42:47,089 INFO L93 Difference]: Finished difference Result 267 states and 315 transitions. [2024-11-28 04:42:47,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-28 04:42:47,090 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 29 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2024-11-28 04:42:47,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:42:47,091 INFO L225 Difference]: With dead ends: 267 [2024-11-28 04:42:47,091 INFO L226 Difference]: Without dead ends: 267 [2024-11-28 04:42:47,092 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=660, Invalid=4742, Unknown=0, NotChecked=0, Total=5402 [2024-11-28 04:42:47,092 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 595 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 1326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:42:47,092 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 945 Invalid, 1326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-28 04:42:47,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-11-28 04:42:47,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 195. [2024-11-28 04:42:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 170 states have (on average 1.2470588235294118) internal successors, (212), 181 states have internal predecessors, (212), 7 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-28 04:42:47,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 232 transitions. [2024-11-28 04:42:47,097 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 232 transitions. Word has length 40 [2024-11-28 04:42:47,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:42:47,097 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 232 transitions. [2024-11-28 04:42:47,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5161290322580645) internal successors, (78), 29 states have internal predecessors, (78), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:42:47,097 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 232 transitions. [2024-11-28 04:42:47,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 04:42:47,098 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:42:47,098 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:42:47,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2024-11-28 04:42:47,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-28 04:42:47,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:47,499 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:42:47,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:42:47,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1328933325, now seen corresponding path program 1 times [2024-11-28 04:42:47,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:42:47,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466691322] [2024-11-28 04:42:47,500 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:42:47,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:47,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:42:47,502 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:42:47,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-28 04:42:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:42:47,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 04:42:47,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:47,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:42:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:42:48,039 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:48,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-28 04:42:48,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 04:42:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:42:48,302 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:42:48,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466691322] [2024-11-28 04:42:48,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466691322] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:42:48,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:42:48,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2024-11-28 04:42:48,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291413189] [2024-11-28 04:42:48,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:42:48,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 04:42:48,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:42:48,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 04:42:48,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:42:48,303 INFO L87 Difference]: Start difference. First operand 195 states and 232 transitions. Second operand has 17 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:42:49,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:42:49,258 INFO L93 Difference]: Finished difference Result 229 states and 265 transitions. [2024-11-28 04:42:49,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:42:49,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2024-11-28 04:42:49,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:42:49,260 INFO L225 Difference]: With dead ends: 229 [2024-11-28 04:42:49,260 INFO L226 Difference]: Without dead ends: 229 [2024-11-28 04:42:49,260 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:42:49,260 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 95 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:42:49,260 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 886 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 04:42:49,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-11-28 04:42:49,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 203. [2024-11-28 04:42:49,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 176 states have (on average 1.2443181818181819) internal successors, (219), 188 states have internal predecessors, (219), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-28 04:42:49,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 239 transitions. [2024-11-28 04:42:49,265 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 239 transitions. Word has length 40 [2024-11-28 04:42:49,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:42:49,266 INFO L471 AbstractCegarLoop]: Abstraction has 203 states and 239 transitions. [2024-11-28 04:42:49,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 16 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:42:49,266 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 239 transitions. [2024-11-28 04:42:49,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 04:42:49,267 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:42:49,267 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:42:49,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-28 04:42:49,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:49,471 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:42:49,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:42:49,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2122146271, now seen corresponding path program 1 times [2024-11-28 04:42:49,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:42:49,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525357058] [2024-11-28 04:42:49,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:42:49,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:49,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:42:49,473 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:42:49,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 04:42:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:42:49,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 04:42:49,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:49,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:42:49,804 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:42:49,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:42:49,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:42:50,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-28 04:42:50,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2024-11-28 04:42:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:42:50,228 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:50,477 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 45 treesize of output 41 [2024-11-28 04:42:50,490 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:42:50,490 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 50 treesize of output 56 [2024-11-28 04:42:50,851 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:42:50,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525357058] [2024-11-28 04:42:50,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525357058] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:42:50,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [627314110] [2024-11-28 04:42:50,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:42:50,851 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:42:50,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:42:50,852 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:42:50,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2024-11-28 04:42:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:42:51,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 04:42:51,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:51,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:42:51,218 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:42:51,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:42:51,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:42:51,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-28 04:42:51,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2024-11-28 04:42:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:42:51,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:51,538 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 45 treesize of output 41 [2024-11-28 04:42:51,551 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:42:51,552 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 50 treesize of output 56 [2024-11-28 04:42:51,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [627314110] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:42:51,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:42:51,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2024-11-28 04:42:51,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303836397] [2024-11-28 04:42:51,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:42:51,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 04:42:51,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:42:51,732 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 04:42:51,732 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:42:51,733 INFO L87 Difference]: Start difference. First operand 203 states and 239 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:42:52,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:42:52,510 INFO L93 Difference]: Finished difference Result 213 states and 249 transitions. [2024-11-28 04:42:52,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:42:52,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2024-11-28 04:42:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:42:52,511 INFO L225 Difference]: With dead ends: 213 [2024-11-28 04:42:52,511 INFO L226 Difference]: Without dead ends: 213 [2024-11-28 04:42:52,511 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:42:52,512 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 69 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:42:52,512 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 416 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:42:52,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-11-28 04:42:52,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2024-11-28 04:42:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 169 states have (on average 1.2544378698224852) internal successors, (212), 181 states have internal predecessors, (212), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (13), 11 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-28 04:42:52,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 232 transitions. [2024-11-28 04:42:52,517 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 232 transitions. Word has length 40 [2024-11-28 04:42:52,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:42:52,517 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 232 transitions. [2024-11-28 04:42:52,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:42:52,517 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 232 transitions. [2024-11-28 04:42:52,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-28 04:42:52,518 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:42:52,518 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:42:52,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-28 04:42:52,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2024-11-28 04:42:52,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 04:42:52,918 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:42:52,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:42:52,919 INFO L85 PathProgramCache]: Analyzing trace with hash -430270806, now seen corresponding path program 3 times [2024-11-28 04:42:52,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:42:52,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180271465] [2024-11-28 04:42:52,919 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:42:52,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:42:52,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:42:52,920 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:42:52,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-28 04:42:53,056 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:42:53,056 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:42:53,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 04:42:53,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:53,110 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 [2024-11-28 04:42:53,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:42:53,608 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2024-11-28 04:42:53,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:42:53,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:42:53,661 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:42:53,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:42:53,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:42:53,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:42:53,994 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:42:53,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:42:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 4 not checked. [2024-11-28 04:42:54,097 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:54,474 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:42:54,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180271465] [2024-11-28 04:42:54,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180271465] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:42:54,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1672707638] [2024-11-28 04:42:54,474 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:42:54,474 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:42:54,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:42:54,476 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:42:54,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2024-11-28 04:42:54,730 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:42:54,731 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:42:54,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 04:42:54,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:42:54,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:42:54,774 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 [2024-11-28 04:42:55,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:42:55,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:42:55,214 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:42:55,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:42:55,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:42:55,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:42:55,419 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:42:55,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:42:55,459 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 4 not checked. [2024-11-28 04:42:55,459 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:42:59,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1672707638] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:42:59,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:42:59,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2024-11-28 04:42:59,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147728799] [2024-11-28 04:42:59,720 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:42:59,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 04:42:59,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:42:59,721 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 04:42:59,721 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=229, Unknown=1, NotChecked=30, Total=306 [2024-11-28 04:42:59,721 INFO L87 Difference]: Start difference. First operand 196 states and 232 transitions. Second operand has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 04:43:00,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:43:00,993 INFO L93 Difference]: Finished difference Result 197 states and 232 transitions. [2024-11-28 04:43:00,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:43:00,994 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2024-11-28 04:43:00,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:43:00,994 INFO L225 Difference]: With dead ends: 197 [2024-11-28 04:43:00,994 INFO L226 Difference]: Without dead ends: 197 [2024-11-28 04:43:00,995 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=111, Invalid=542, Unknown=1, NotChecked=48, Total=702 [2024-11-28 04:43:00,995 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 106 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:43:00,995 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 423 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 363 Invalid, 0 Unknown, 91 Unchecked, 0.7s Time] [2024-11-28 04:43:00,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-28 04:43:00,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 184. [2024-11-28 04:43:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 159 states have (on average 1.2641509433962264) internal successors, (201), 171 states have internal predecessors, (201), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 04:43:00,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 215 transitions. [2024-11-28 04:43:00,999 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 215 transitions. Word has length 42 [2024-11-28 04:43:01,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:43:01,000 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 215 transitions. [2024-11-28 04:43:01,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.076923076923077) internal successors, (27), 15 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 04:43:01,000 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 215 transitions. [2024-11-28 04:43:01,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-28 04:43:01,000 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:43:01,001 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:43:01,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-28 04:43:01,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2024-11-28 04:43:01,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 04:43:01,401 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:43:01,402 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:43:01,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1949372699, now seen corresponding path program 1 times [2024-11-28 04:43:01,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:43:01,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222460571] [2024-11-28 04:43:01,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:43:01,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:43:01,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:43:01,404 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:43:01,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-28 04:43:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:43:01,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 04:43:01,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:43:01,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:43:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:43:01,909 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:43:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 04:43:02,173 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:43:02,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222460571] [2024-11-28 04:43:02,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222460571] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:43:02,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:43:02,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2024-11-28 04:43:02,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176985495] [2024-11-28 04:43:02,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:43:02,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:43:02,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:43:02,174 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:43:02,174 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:43:02,175 INFO L87 Difference]: Start difference. First operand 184 states and 215 transitions. Second operand has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 04:43:03,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:43:03,553 INFO L93 Difference]: Finished difference Result 232 states and 264 transitions. [2024-11-28 04:43:03,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 04:43:03,554 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2024-11-28 04:43:03,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:43:03,554 INFO L225 Difference]: With dead ends: 232 [2024-11-28 04:43:03,555 INFO L226 Difference]: Without dead ends: 230 [2024-11-28 04:43:03,555 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=191, Invalid=1141, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 04:43:03,555 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 125 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:43:03,556 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 819 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 04:43:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-11-28 04:43:03,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 190. [2024-11-28 04:43:03,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 164 states have (on average 1.2560975609756098) internal successors, (206), 176 states have internal predecessors, (206), 5 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 04:43:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 220 transitions. [2024-11-28 04:43:03,560 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 220 transitions. Word has length 42 [2024-11-28 04:43:03,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:43:03,560 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 220 transitions. [2024-11-28 04:43:03,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 04:43:03,561 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 220 transitions. [2024-11-28 04:43:03,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-28 04:43:03,561 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:43:03,561 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:43:03,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-28 04:43:03,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:43:03,762 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:43:03,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:43:03,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1752740028, now seen corresponding path program 1 times [2024-11-28 04:43:03,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:43:03,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933179308] [2024-11-28 04:43:03,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:43:03,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:43:03,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:43:03,765 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:43:03,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-28 04:43:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:43:03,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 04:43:03,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:43:04,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:43:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:43:04,486 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:43:04,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-28 04:43:04,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-28 04:43:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:43:04,910 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:43:04,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933179308] [2024-11-28 04:43:04,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933179308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:43:04,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:43:04,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2024-11-28 04:43:04,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821780674] [2024-11-28 04:43:04,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:43:04,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 04:43:04,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:43:04,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 04:43:04,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:43:04,912 INFO L87 Difference]: Start difference. First operand 190 states and 220 transitions. Second operand has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:43:08,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:43:13,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:43:14,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:43:14,195 INFO L93 Difference]: Finished difference Result 214 states and 244 transitions. [2024-11-28 04:43:14,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 04:43:14,195 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2024-11-28 04:43:14,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:43:14,196 INFO L225 Difference]: With dead ends: 214 [2024-11-28 04:43:14,196 INFO L226 Difference]: Without dead ends: 214 [2024-11-28 04:43:14,197 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:43:14,197 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 124 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:43:14,197 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 629 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 518 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2024-11-28 04:43:14,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-11-28 04:43:14,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 192. [2024-11-28 04:43:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 178 states have internal predecessors, (208), 5 states have call successors, (5), 4 states have call predecessors, (5), 7 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-28 04:43:14,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 222 transitions. [2024-11-28 04:43:14,201 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 222 transitions. Word has length 41 [2024-11-28 04:43:14,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:43:14,201 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 222 transitions. [2024-11-28 04:43:14,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:43:14,202 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 222 transitions. [2024-11-28 04:43:14,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-28 04:43:14,202 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:43:14,202 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:43:14,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-28 04:43:14,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:43:14,403 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:43:14,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:43:14,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1405195687, now seen corresponding path program 1 times [2024-11-28 04:43:14,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:43:14,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464494315] [2024-11-28 04:43:14,404 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:43:14,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:43:14,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:43:14,405 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:43:14,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-28 04:43:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:43:14,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 04:43:14,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:43:14,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:43:14,915 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2024-11-28 04:43:14,915 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 11 treesize of output 7 [2024-11-28 04:43:15,215 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 7 treesize of output 3 [2024-11-28 04:43:15,429 WARN L873 $PredicateComparison]: unable to prove that (and (= (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)) (_ bv0 1)) (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_30| (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 1))) (and (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32) (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_30| (_ bv0 1))) (= (_ bv0 1) (bvadd v_DerPreprocessor_3 (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_30| v_DerPreprocessor_3) (_ bv0 32) (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_30|))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_30|))))) is different from true [2024-11-28 04:43:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:43:15,443 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:43:15,818 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 26 treesize of output 24 [2024-11-28 04:43:15,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2024-11-28 04:43:40,600 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:43:40,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464494315] [2024-11-28 04:43:40,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464494315] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:43:40,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1980181586] [2024-11-28 04:43:40,600 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:43:40,600 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:43:40,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:43:40,602 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:43:40,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2024-11-28 04:43:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:43:40,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 04:43:40,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:43:40,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:43:41,107 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2024-11-28 04:43:41,107 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 11 treesize of output 7 [2024-11-28 04:43:41,357 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 7 treesize of output 3 [2024-11-28 04:43:41,468 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_33| (_ BitVec 32)) (v_DerPreprocessor_6 (_ BitVec 1))) (and (= (_ bv0 1) (bvadd v_DerPreprocessor_6 (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_33| v_DerPreprocessor_6) (_ bv0 32) (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_33|))) (= (store (store |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32) (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_33| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_33|)))) (= (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)) (_ bv0 1))) is different from true [2024-11-28 04:43:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:43:41,482 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:43:41,655 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 26 treesize of output 24 [2024-11-28 04:43:41,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2024-11-28 04:44:06,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1980181586] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:44:06,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:44:06,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2024-11-28 04:44:06,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983295439] [2024-11-28 04:44:06,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:44:06,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 04:44:06,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:44:06,110 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 04:44:06,110 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=478, Unknown=6, NotChecked=90, Total=650 [2024-11-28 04:44:06,110 INFO L87 Difference]: Start difference. First operand 192 states and 222 transitions. Second operand has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:44:07,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:44:07,372 INFO L93 Difference]: Finished difference Result 205 states and 234 transitions. [2024-11-28 04:44:07,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:44:07,372 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2024-11-28 04:44:07,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:44:07,373 INFO L225 Difference]: With dead ends: 205 [2024-11-28 04:44:07,373 INFO L226 Difference]: Without dead ends: 185 [2024-11-28 04:44:07,373 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 114 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 50.3s TimeCoverageRelationStatistics Valid=186, Invalid=1076, Unknown=6, NotChecked=138, Total=1406 [2024-11-28 04:44:07,374 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 110 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:44:07,374 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 365 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 347 Invalid, 0 Unknown, 196 Unchecked, 0.6s Time] [2024-11-28 04:44:07,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-11-28 04:44:07,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2024-11-28 04:44:07,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 160 states have (on average 1.25) internal successors, (200), 172 states have internal predecessors, (200), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:44:07,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 213 transitions. [2024-11-28 04:44:07,378 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 213 transitions. Word has length 41 [2024-11-28 04:44:07,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:44:07,378 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 213 transitions. [2024-11-28 04:44:07,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:44:07,378 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 213 transitions. [2024-11-28 04:44:07,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 04:44:07,379 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:44:07,379 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:44:07,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-28 04:44:07,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2024-11-28 04:44:07,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 04:44:07,780 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:44:07,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:44:07,780 INFO L85 PathProgramCache]: Analyzing trace with hash 301011640, now seen corresponding path program 1 times [2024-11-28 04:44:07,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:44:07,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429449485] [2024-11-28 04:44:07,780 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:44:07,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:44:07,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:44:07,782 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:44:07,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-28 04:44:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:44:07,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 04:44:07,925 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:44:08,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:44:08,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-28 04:44:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 04:44:08,415 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:44:08,757 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 04:44:08,757 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:44:08,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429449485] [2024-11-28 04:44:08,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429449485] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:44:08,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:44:08,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 18 [2024-11-28 04:44:08,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199003778] [2024-11-28 04:44:08,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:44:08,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 04:44:08,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:44:08,758 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 04:44:08,758 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2024-11-28 04:44:08,758 INFO L87 Difference]: Start difference. First operand 185 states and 213 transitions. Second operand has 19 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 04:44:12,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:44:15,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:44:18,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:44:18,671 INFO L93 Difference]: Finished difference Result 212 states and 242 transitions. [2024-11-28 04:44:18,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 04:44:18,672 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2024-11-28 04:44:18,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:44:18,673 INFO L225 Difference]: With dead ends: 212 [2024-11-28 04:44:18,673 INFO L226 Difference]: Without dead ends: 212 [2024-11-28 04:44:18,674 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=207, Invalid=1353, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 04:44:18,674 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 135 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:44:18,674 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 651 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 623 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2024-11-28 04:44:18,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-11-28 04:44:18,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 187. [2024-11-28 04:44:18,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 162 states have (on average 1.2469135802469136) internal successors, (202), 174 states have internal predecessors, (202), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2024-11-28 04:44:18,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 215 transitions. [2024-11-28 04:44:18,683 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 215 transitions. Word has length 43 [2024-11-28 04:44:18,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:44:18,683 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 215 transitions. [2024-11-28 04:44:18,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.0) internal successors, (54), 16 states have internal predecessors, (54), 4 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 04:44:18,684 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 215 transitions. [2024-11-28 04:44:18,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-28 04:44:18,684 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:44:18,684 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:44:18,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-28 04:44:18,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:44:18,885 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:44:18,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:44:18,885 INFO L85 PathProgramCache]: Analyzing trace with hash -726894078, now seen corresponding path program 1 times [2024-11-28 04:44:18,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:44:18,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977355547] [2024-11-28 04:44:18,886 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:44:18,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:44:18,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:44:18,887 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:44:18,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-28 04:44:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:44:19,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 04:44:19,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:44:19,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:44:20,117 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 38 treesize of output 22 [2024-11-28 04:44:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:44:28,870 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:44:34,679 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 72 treesize of output 64 [2024-11-28 04:44:34,762 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 40 treesize of output 36 [2024-11-28 04:44:40,169 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse5 (= (bvadd (bvmul |c_ULTIMATE.start_alloc_17_~i~0#1| (_ bv4 32)) |c_ULTIMATE.start_alloc_17_~array#1.offset|) |c_ULTIMATE.start_entry_point_~array~0#1.offset|)) (.cse6 (= |c_ULTIMATE.start_entry_point_~array~0#1.base| |c_ULTIMATE.start_alloc_17_~array#1.base|))) (let ((.cse4 (forall ((|v_ULTIMATE.start_alloc_17_#t~ret42#1.base_142| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_142|))))) (.cse2 (not .cse6)) (.cse3 (not .cse5)) (.cse7 (forall ((v_arrayElimCell_104 (_ BitVec 32)) (v_antiDerIndex_entry0_3 (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_#t~ret42#1.base_142| (_ BitVec 32)) (v_ArrVal_844 (_ BitVec 1))) (or (= (_ bv0 1) (let ((.cse9 (store |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_142| v_ArrVal_844))) (bvadd (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_entry_point_~array~0#1.base| (select .cse9 |c_ULTIMATE.start_entry_point_~array~0#1.base|)) v_arrayElimCell_104 (select .cse9 v_arrayElimCell_104)) v_antiDerIndex_entry0_3) (select .cse9 v_antiDerIndex_entry0_3)))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_142|))))))) (and (forall ((|v_ULTIMATE.start_alloc_17_#t~ret42#1.base_142| (_ BitVec 32))) (or (forall ((v_arrayElimCell_104 (_ BitVec 32)) (v_antiDerIndex_entry0_3 (_ BitVec 32)) (v_ArrVal_844 (_ BitVec 1))) (let ((.cse0 (store |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_142| v_ArrVal_844))) (let ((.cse1 (store |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_entry_point_~array~0#1.base| (select .cse0 |c_ULTIMATE.start_entry_point_~array~0#1.base|)))) (or (= (_ bv0 1) (bvadd (select .cse0 v_antiDerIndex_entry0_3) (select (store .cse1 |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_142| v_ArrVal_844) v_antiDerIndex_entry0_3))) (= (_ bv0 1) (bvadd (select |c_#valid| v_antiDerIndex_entry0_3) (select (store .cse1 v_arrayElimCell_104 (select .cse0 v_arrayElimCell_104)) v_antiDerIndex_entry0_3))))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_142|))))) (or (and (forall ((v_arrayElimCell_105 (_ BitVec 32))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| v_arrayElimCell_105))) (or .cse2 .cse3)) (and (or .cse4 .cse5) (or .cse6 .cse4) (forall ((|v_ULTIMATE.start_alloc_17_#t~ret42#1.base_142| (_ BitVec 32))) (or (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_142|)) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_142|))))))) (or .cse7 .cse5) (or .cse4 (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_entry_point_~array~0#1.base|))) (or .cse2 (forall ((v_antiDerIndex_entry0_3 (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_#t~ret42#1.base_142| (_ BitVec 32)) (v_ArrVal_844 (_ BitVec 1))) (or (= (_ bv0 1) (let ((.cse8 (store |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_142| v_ArrVal_844))) (bvadd (select .cse8 v_antiDerIndex_entry0_3) (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_entry_point_~array~0#1.base| (select .cse8 |c_ULTIMATE.start_entry_point_~array~0#1.base|)) |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_142| v_ArrVal_844) v_antiDerIndex_entry0_3)))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret42#1.base_142|))))) .cse3) (or .cse7 .cse6)))) is different from false [2024-11-28 04:44:40,175 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:44:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977355547] [2024-11-28 04:44:40,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977355547] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:44:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1532289422] [2024-11-28 04:44:40,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:44:40,175 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:44:40,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:44:40,177 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:44:40,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2024-11-28 04:44:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:44:40,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 04:44:40,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:44:46,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:44:46,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2024-11-28 04:44:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:44:56,754 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:44:57,901 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 116 treesize of output 108 [2024-11-28 04:45:17,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1532289422] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:45:17,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:45:17,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2024-11-28 04:45:17,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477968133] [2024-11-28 04:45:17,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:45:17,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 04:45:17,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:45:17,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 04:45:17,357 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1548, Unknown=11, NotChecked=80, Total=1806 [2024-11-28 04:45:17,357 INFO L87 Difference]: Start difference. First operand 187 states and 215 transitions. Second operand has 29 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 25 states have internal predecessors, (69), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:45:21,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:45:25,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:45:29,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:45:33,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:45:37,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:45:41,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:45:41,835 INFO L93 Difference]: Finished difference Result 191 states and 218 transitions. [2024-11-28 04:45:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 04:45:41,836 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 25 states have internal predecessors, (69), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 42 [2024-11-28 04:45:41,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:45:41,837 INFO L225 Difference]: With dead ends: 191 [2024-11-28 04:45:41,837 INFO L226 Difference]: Without dead ends: 165 [2024-11-28 04:45:41,837 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 55.2s TimeCoverageRelationStatistics Valid=306, Invalid=2657, Unknown=11, NotChecked=106, Total=3080 [2024-11-28 04:45:41,838 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 122 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 25 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:45:41,838 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 638 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 814 Invalid, 5 Unknown, 0 Unchecked, 22.7s Time] [2024-11-28 04:45:41,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-28 04:45:41,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2024-11-28 04:45:41,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 140 states have (on average 1.2785714285714285) internal successors, (179), 152 states have internal predecessors, (179), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 04:45:41,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 190 transitions. [2024-11-28 04:45:41,842 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 190 transitions. Word has length 42 [2024-11-28 04:45:41,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:45:41,842 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 190 transitions. [2024-11-28 04:45:41,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 25 states have internal predecessors, (69), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:45:41,842 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 190 transitions. [2024-11-28 04:45:41,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 04:45:41,843 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:45:41,843 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:45:41,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2024-11-28 04:45:42,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-11-28 04:45:42,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:45:42,244 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:45:42,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:45:42,244 INFO L85 PathProgramCache]: Analyzing trace with hash 741426365, now seen corresponding path program 1 times [2024-11-28 04:45:42,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:45:42,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136186795] [2024-11-28 04:45:42,244 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:45:42,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:45:42,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:45:42,246 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:45:42,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-28 04:45:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:45:42,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 04:45:42,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:45:42,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:45:42,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:45:42,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-28 04:45:43,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 04:45:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 04:45:43,073 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:45:43,715 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 04:45:43,715 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:45:43,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136186795] [2024-11-28 04:45:43,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136186795] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:45:43,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:45:43,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2024-11-28 04:45:43,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920010982] [2024-11-28 04:45:43,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:45:43,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 04:45:43,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:45:43,716 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 04:45:43,717 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:45:43,717 INFO L87 Difference]: Start difference. First operand 163 states and 190 transitions. Second operand has 20 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 04:45:46,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:45:46,722 INFO L93 Difference]: Finished difference Result 165 states and 192 transitions. [2024-11-28 04:45:46,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 04:45:46,723 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2024-11-28 04:45:46,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:45:46,724 INFO L225 Difference]: With dead ends: 165 [2024-11-28 04:45:46,724 INFO L226 Difference]: Without dead ends: 165 [2024-11-28 04:45:46,724 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 04:45:46,724 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 75 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:45:46,724 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 482 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 04:45:46,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-28 04:45:46,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2024-11-28 04:45:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 142 states have (on average 1.2746478873239437) internal successors, (181), 154 states have internal predecessors, (181), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 04:45:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 192 transitions. [2024-11-28 04:45:46,728 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 192 transitions. Word has length 44 [2024-11-28 04:45:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:45:46,728 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 192 transitions. [2024-11-28 04:45:46,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-28 04:45:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 192 transitions. [2024-11-28 04:45:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 04:45:46,729 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:45:46,729 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:45:46,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2024-11-28 04:45:46,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:45:46,930 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:45:46,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:45:46,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1509380955, now seen corresponding path program 1 times [2024-11-28 04:45:46,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:45:46,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974802315] [2024-11-28 04:45:46,930 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:45:46,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:45:46,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:45:46,932 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:45:46,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-28 04:45:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:45:47,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 04:45:47,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:45:47,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:45:47,444 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:45:47,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:45:47,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:45:51,793 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_39| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_39|) (_ bv0 32)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_39|))) is different from true [2024-11-28 04:45:52,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-28 04:45:52,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2024-11-28 04:45:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 6 not checked. [2024-11-28 04:45:52,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:45:52,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2024-11-28 04:45:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 04:45:53,481 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:45:53,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974802315] [2024-11-28 04:45:53,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974802315] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:45:53,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:45:53,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2024-11-28 04:45:53,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088705421] [2024-11-28 04:45:53,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:45:53,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 04:45:53,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:45:53,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 04:45:53,483 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=497, Unknown=1, NotChecked=44, Total=600 [2024-11-28 04:45:53,483 INFO L87 Difference]: Start difference. First operand 165 states and 192 transitions. Second operand has 25 states, 24 states have (on average 2.5) internal successors, (60), 21 states have internal predecessors, (60), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:46:01,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:46:01,412 INFO L93 Difference]: Finished difference Result 178 states and 204 transitions. [2024-11-28 04:46:01,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 04:46:01,413 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.5) internal successors, (60), 21 states have internal predecessors, (60), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2024-11-28 04:46:01,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:46:01,413 INFO L225 Difference]: With dead ends: 178 [2024-11-28 04:46:01,414 INFO L226 Difference]: Without dead ends: 178 [2024-11-28 04:46:01,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=242, Invalid=1740, Unknown=2, NotChecked=86, Total=2070 [2024-11-28 04:46:01,414 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 96 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:46:01,414 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 757 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 772 Invalid, 0 Unknown, 115 Unchecked, 2.1s Time] [2024-11-28 04:46:01,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-28 04:46:01,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 171. [2024-11-28 04:46:01,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 147 states have (on average 1.272108843537415) internal successors, (187), 159 states have internal predecessors, (187), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 04:46:01,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 198 transitions. [2024-11-28 04:46:01,418 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 198 transitions. Word has length 45 [2024-11-28 04:46:01,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:46:01,418 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 198 transitions. [2024-11-28 04:46:01,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.5) internal successors, (60), 21 states have internal predecessors, (60), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:46:01,418 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 198 transitions. [2024-11-28 04:46:01,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 04:46:01,419 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:46:01,419 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:46:01,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-11-28 04:46:01,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:46:01,619 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:46:01,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:46:01,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1960900283, now seen corresponding path program 2 times [2024-11-28 04:46:01,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:46:01,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28338228] [2024-11-28 04:46:01,620 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:46:01,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:46:01,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:46:01,624 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:46:01,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-28 04:46:01,769 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:46:01,769 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:46:01,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 04:46:01,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:46:02,025 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 11 treesize of output 7 [2024-11-28 04:46:02,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 04:46:02,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2024-11-28 04:46:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:46:02,804 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:46:03,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-11-28 04:46:03,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-11-28 04:46:03,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2024-11-28 04:46:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:46:04,124 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:46:04,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28338228] [2024-11-28 04:46:04,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28338228] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:46:04,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:46:04,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2024-11-28 04:46:04,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149851733] [2024-11-28 04:46:04,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:46:04,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 04:46:04,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:46:04,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 04:46:04,126 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:46:04,126 INFO L87 Difference]: Start difference. First operand 171 states and 198 transitions. Second operand has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:46:08,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:46:13,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:46:18,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:46:18,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:46:18,079 INFO L93 Difference]: Finished difference Result 198 states and 227 transitions. [2024-11-28 04:46:18,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 04:46:18,083 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 44 [2024-11-28 04:46:18,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:46:18,084 INFO L225 Difference]: With dead ends: 198 [2024-11-28 04:46:18,084 INFO L226 Difference]: Without dead ends: 198 [2024-11-28 04:46:18,084 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 04:46:18,085 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 181 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:46:18,085 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 553 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 348 Invalid, 3 Unknown, 0 Unchecked, 13.1s Time] [2024-11-28 04:46:18,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-28 04:46:18,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 172. [2024-11-28 04:46:18,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 148 states have (on average 1.277027027027027) internal successors, (189), 160 states have internal predecessors, (189), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 04:46:18,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 200 transitions. [2024-11-28 04:46:18,088 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 200 transitions. Word has length 44 [2024-11-28 04:46:18,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:46:18,089 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 200 transitions. [2024-11-28 04:46:18,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:46:18,089 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 200 transitions. [2024-11-28 04:46:18,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 04:46:18,090 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:46:18,090 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:46:18,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-11-28 04:46:18,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:46:18,290 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:46:18,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:46:18,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1960900284, now seen corresponding path program 3 times [2024-11-28 04:46:18,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:46:18,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990759911] [2024-11-28 04:46:18,291 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:46:18,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:46:18,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:46:18,295 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:46:18,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-28 04:46:18,445 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 04:46:18,445 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:46:18,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 04:46:18,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:46:18,549 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 [2024-11-28 04:46:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:46:19,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:46:28,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:46:28,865 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:46:28,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990759911] [2024-11-28 04:46:28,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990759911] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:46:28,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:46:28,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2024-11-28 04:46:28,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158638284] [2024-11-28 04:46:28,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:46:28,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 04:46:28,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:46:28,867 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 04:46:28,867 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=564, Unknown=1, NotChecked=0, Total=650 [2024-11-28 04:46:28,867 INFO L87 Difference]: Start difference. First operand 172 states and 200 transitions. Second operand has 26 states, 23 states have (on average 3.130434782608696) internal successors, (72), 24 states have internal predecessors, (72), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:46:33,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:46:33,405 INFO L93 Difference]: Finished difference Result 197 states and 231 transitions. [2024-11-28 04:46:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 04:46:33,407 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 3.130434782608696) internal successors, (72), 24 states have internal predecessors, (72), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 44 [2024-11-28 04:46:33,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:46:33,407 INFO L225 Difference]: With dead ends: 197 [2024-11-28 04:46:33,407 INFO L226 Difference]: Without dead ends: 197 [2024-11-28 04:46:33,408 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=144, Invalid=847, Unknown=1, NotChecked=0, Total=992 [2024-11-28 04:46:33,408 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 111 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:46:33,408 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 688 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-28 04:46:33,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-28 04:46:33,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 188. [2024-11-28 04:46:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 164 states have (on average 1.3414634146341464) internal successors, (220), 176 states have internal predecessors, (220), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 04:46:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 231 transitions. [2024-11-28 04:46:33,411 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 231 transitions. Word has length 44 [2024-11-28 04:46:33,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:46:33,412 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 231 transitions. [2024-11-28 04:46:33,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 3.130434782608696) internal successors, (72), 24 states have internal predecessors, (72), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:46:33,412 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 231 transitions. [2024-11-28 04:46:33,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-28 04:46:33,412 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:46:33,412 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:46:33,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2024-11-28 04:46:33,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:46:33,613 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:46:33,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:46:33,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1821913273, now seen corresponding path program 3 times [2024-11-28 04:46:33,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:46:33,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272809763] [2024-11-28 04:46:33,614 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:46:33,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:46:33,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:46:33,615 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:46:33,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-28 04:46:37,440 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-28 04:46:37,441 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:46:37,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 04:46:37,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:46:37,569 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 [2024-11-28 04:46:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:46:40,583 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:46:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:46:50,686 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:46:50,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272809763] [2024-11-28 04:46:50,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272809763] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:46:50,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:46:50,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 45 [2024-11-28 04:46:50,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709887267] [2024-11-28 04:46:50,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:46:50,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-28 04:46:50,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:46:50,687 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-28 04:46:50,688 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=1652, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 04:46:50,688 INFO L87 Difference]: Start difference. First operand 188 states and 231 transitions. Second operand has 46 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 44 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:48:11,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:48:11,338 INFO L93 Difference]: Finished difference Result 236 states and 299 transitions. [2024-11-28 04:48:11,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-28 04:48:11,339 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 44 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2024-11-28 04:48:11,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:48:11,341 INFO L225 Difference]: With dead ends: 236 [2024-11-28 04:48:11,341 INFO L226 Difference]: Without dead ends: 236 [2024-11-28 04:48:11,342 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 81.1s TimeCoverageRelationStatistics Valid=1503, Invalid=4503, Unknown=0, NotChecked=0, Total=6006 [2024-11-28 04:48:11,343 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 518 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:48:11,343 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 840 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2024-11-28 04:48:11,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-28 04:48:11,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 224. [2024-11-28 04:48:11,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 200 states have (on average 1.34) internal successors, (268), 212 states have internal predecessors, (268), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 04:48:11,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 279 transitions. [2024-11-28 04:48:11,348 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 279 transitions. Word has length 44 [2024-11-28 04:48:11,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:48:11,348 INFO L471 AbstractCegarLoop]: Abstraction has 224 states and 279 transitions. [2024-11-28 04:48:11,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 1.9069767441860466) internal successors, (82), 44 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:48:11,348 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 279 transitions. [2024-11-28 04:48:11,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 04:48:11,349 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:48:11,349 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:48:11,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-11-28 04:48:11,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:11,550 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:48:11,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:48:11,550 INFO L85 PathProgramCache]: Analyzing trace with hash -861921713, now seen corresponding path program 2 times [2024-11-28 04:48:11,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:48:11,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88127870] [2024-11-28 04:48:11,550 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:48:11,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:11,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:48:11,552 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:48:11,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-28 04:48:11,725 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:48:11,725 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:48:11,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 04:48:11,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:48:12,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:48:12,645 INFO L349 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2024-11-28 04:48:12,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2024-11-28 04:48:12,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 04:48:12,974 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:48:25,727 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 36 treesize of output 32 [2024-11-28 04:48:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 04:48:26,170 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:48:26,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88127870] [2024-11-28 04:48:26,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88127870] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:48:26,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:48:26,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2024-11-28 04:48:26,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318312398] [2024-11-28 04:48:26,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:48:26,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 04:48:26,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:48:26,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 04:48:26,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=466, Unknown=2, NotChecked=0, Total=552 [2024-11-28 04:48:26,171 INFO L87 Difference]: Start difference. First operand 224 states and 279 transitions. Second operand has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 19 states have internal predecessors, (59), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:48:30,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:48:32,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:48:32,357 INFO L93 Difference]: Finished difference Result 248 states and 305 transitions. [2024-11-28 04:48:32,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 04:48:32,358 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 19 states have internal predecessors, (59), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2024-11-28 04:48:32,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:48:32,358 INFO L225 Difference]: With dead ends: 248 [2024-11-28 04:48:32,358 INFO L226 Difference]: Without dead ends: 248 [2024-11-28 04:48:32,359 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=119, Invalid=635, Unknown=2, NotChecked=0, Total=756 [2024-11-28 04:48:32,359 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 88 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:48:32,359 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 683 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 432 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2024-11-28 04:48:32,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2024-11-28 04:48:32,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 226. [2024-11-28 04:48:32,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 202 states have (on average 1.3465346534653466) internal successors, (272), 214 states have internal predecessors, (272), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-28 04:48:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 283 transitions. [2024-11-28 04:48:32,364 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 283 transitions. Word has length 46 [2024-11-28 04:48:32,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:48:32,364 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 283 transitions. [2024-11-28 04:48:32,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 19 states have internal predecessors, (59), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:48:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 283 transitions. [2024-11-28 04:48:32,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 04:48:32,365 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:48:32,366 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:48:32,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-11-28 04:48:32,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:32,566 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:48:32,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:48:32,567 INFO L85 PathProgramCache]: Analyzing trace with hash 658366708, now seen corresponding path program 2 times [2024-11-28 04:48:32,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:48:32,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995579424] [2024-11-28 04:48:32,567 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:48:32,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:32,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:48:32,569 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:48:32,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-11-28 04:48:32,728 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:48:32,729 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:48:32,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 04:48:32,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:48:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:48:33,533 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:48:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:48:34,347 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:48:34,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995579424] [2024-11-28 04:48:34,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995579424] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:48:34,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:48:34,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-11-28 04:48:34,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323607275] [2024-11-28 04:48:34,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:48:34,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:48:34,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:48:34,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:48:34,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:48:34,349 INFO L87 Difference]: Start difference. First operand 226 states and 283 transitions. Second operand has 21 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:48:35,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:48:35,232 INFO L93 Difference]: Finished difference Result 336 states and 414 transitions. [2024-11-28 04:48:35,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:48:35,233 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2024-11-28 04:48:35,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:48:35,235 INFO L225 Difference]: With dead ends: 336 [2024-11-28 04:48:35,235 INFO L226 Difference]: Without dead ends: 336 [2024-11-28 04:48:35,235 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:48:35,235 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 110 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:48:35,235 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 584 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 04:48:35,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2024-11-28 04:48:35,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 322. [2024-11-28 04:48:35,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 295 states have (on average 1.3322033898305086) internal successors, (393), 304 states have internal predecessors, (393), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (13), 13 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-28 04:48:35,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 413 transitions. [2024-11-28 04:48:35,243 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 413 transitions. Word has length 45 [2024-11-28 04:48:35,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:48:35,243 INFO L471 AbstractCegarLoop]: Abstraction has 322 states and 413 transitions. [2024-11-28 04:48:35,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:48:35,244 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 413 transitions. [2024-11-28 04:48:35,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 04:48:35,244 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:48:35,244 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:48:35,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-11-28 04:48:35,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:35,445 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:48:35,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:48:35,446 INFO L85 PathProgramCache]: Analyzing trace with hash -949769184, now seen corresponding path program 2 times [2024-11-28 04:48:35,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:48:35,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427834221] [2024-11-28 04:48:35,446 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:48:35,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:35,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:48:35,449 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:48:35,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-11-28 04:48:35,625 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:48:35,625 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:48:35,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 04:48:35,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:48:36,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:48:36,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-28 04:48:36,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-28 04:48:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 04:48:37,038 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:48:41,539 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:48:41,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427834221] [2024-11-28 04:48:41,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427834221] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:48:41,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1317261770] [2024-11-28 04:48:41,540 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:48:41,540 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:48:41,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:48:41,542 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:48:41,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2024-11-28 04:48:41,929 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:48:41,929 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:48:41,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 04:48:41,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:48:42,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:48:42,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-28 04:48:42,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-28 04:48:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:48:42,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:48:42,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1317261770] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:48:42,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:48:42,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2024-11-28 04:48:42,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204906865] [2024-11-28 04:48:42,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:48:42,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 04:48:42,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:48:42,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 04:48:42,963 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=284, Unknown=1, NotChecked=0, Total=342 [2024-11-28 04:48:42,963 INFO L87 Difference]: Start difference. First operand 322 states and 413 transitions. Second operand has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 04:48:47,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:48:51,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:48:53,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:48:53,404 INFO L93 Difference]: Finished difference Result 421 states and 537 transitions. [2024-11-28 04:48:53,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:48:53,405 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2024-11-28 04:48:53,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:48:53,407 INFO L225 Difference]: With dead ends: 421 [2024-11-28 04:48:53,407 INFO L226 Difference]: Without dead ends: 421 [2024-11-28 04:48:53,408 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=99, Invalid=500, Unknown=1, NotChecked=0, Total=600 [2024-11-28 04:48:53,408 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 92 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:48:53,408 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 565 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 507 Invalid, 2 Unknown, 0 Unchecked, 10.0s Time] [2024-11-28 04:48:53,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2024-11-28 04:48:53,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 346. [2024-11-28 04:48:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 315 states have (on average 1.326984126984127) internal successors, (418), 325 states have internal predecessors, (418), 9 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (17), 15 states have call predecessors, (17), 9 states have call successors, (17) [2024-11-28 04:48:53,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 444 transitions. [2024-11-28 04:48:53,415 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 444 transitions. Word has length 47 [2024-11-28 04:48:53,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:48:53,416 INFO L471 AbstractCegarLoop]: Abstraction has 346 states and 444 transitions. [2024-11-28 04:48:53,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 04:48:53,416 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 444 transitions. [2024-11-28 04:48:53,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 04:48:53,417 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:48:53,417 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:48:53,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (63)] Ended with exit code 0 [2024-11-28 04:48:53,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2024-11-28 04:48:53,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:53,818 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:48:53,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:48:53,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1730285979, now seen corresponding path program 4 times [2024-11-28 04:48:53,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:48:53,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618333856] [2024-11-28 04:48:53,819 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:48:53,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:53,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:48:53,821 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:48:53,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-11-28 04:48:54,026 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:48:54,026 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:48:54,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 04:48:54,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:48:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 04:48:54,764 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:48:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:48:55,667 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:48:55,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618333856] [2024-11-28 04:48:55,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618333856] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:48:55,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:48:55,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-11-28 04:48:55,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261964107] [2024-11-28 04:48:55,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:48:55,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 04:48:55,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:48:55,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 04:48:55,669 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:48:55,669 INFO L87 Difference]: Start difference. First operand 346 states and 444 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-28 04:48:56,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:48:56,890 INFO L93 Difference]: Finished difference Result 309 states and 382 transitions. [2024-11-28 04:48:56,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 04:48:56,891 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 49 [2024-11-28 04:48:56,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:48:56,892 INFO L225 Difference]: With dead ends: 309 [2024-11-28 04:48:56,892 INFO L226 Difference]: Without dead ends: 309 [2024-11-28 04:48:56,892 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:48:56,893 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 131 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:48:56,893 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 564 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 04:48:56,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2024-11-28 04:48:56,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 304. [2024-11-28 04:48:56,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 275 states have (on average 1.3163636363636364) internal successors, (362), 286 states have internal predecessors, (362), 7 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-28 04:48:56,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 382 transitions. [2024-11-28 04:48:56,917 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 382 transitions. Word has length 49 [2024-11-28 04:48:56,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:48:56,917 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 382 transitions. [2024-11-28 04:48:56,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-28 04:48:56,917 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 382 transitions. [2024-11-28 04:48:56,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 04:48:56,919 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:48:56,919 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:48:56,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2024-11-28 04:48:57,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:57,120 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:48:57,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:48:57,121 INFO L85 PathProgramCache]: Analyzing trace with hash 621926513, now seen corresponding path program 2 times [2024-11-28 04:48:57,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:48:57,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735411429] [2024-11-28 04:48:57,122 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:48:57,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:48:57,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:48:57,124 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:48:57,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-11-28 04:48:57,354 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:48:57,354 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:48:57,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 04:48:57,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:48:57,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:48:57,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:48:58,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-28 04:48:58,220 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#valid)| |ldv_malloc_#res.base| (select |c_#valid| |ldv_malloc_#res.base|)) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2024-11-28 04:48:58,338 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2024-11-28 04:48:58,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2024-11-28 04:48:58,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-28 04:48:58,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 04:48:58,735 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 4 not checked. [2024-11-28 04:48:58,735 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:49:07,527 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:49:07,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735411429] [2024-11-28 04:49:07,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735411429] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:49:07,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [154726173] [2024-11-28 04:49:07,527 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:49:07,527 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:49:07,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:49:07,529 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:49:07,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2024-11-28 04:49:07,952 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:49:07,952 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:49:07,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 04:49:07,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:49:08,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:49:08,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:49:08,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-28 04:49:08,433 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)))) is different from true [2024-11-28 04:49:08,509 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2024-11-28 04:49:08,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2024-11-28 04:49:08,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-28 04:49:08,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-28 04:49:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2024-11-28 04:49:08,781 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:49:13,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [154726173] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:49:13,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:49:13,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 17 [2024-11-28 04:49:13,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139491754] [2024-11-28 04:49:13,158 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:49:13,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:49:13,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:49:13,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:49:13,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=323, Unknown=4, NotChecked=74, Total=462 [2024-11-28 04:49:13,159 INFO L87 Difference]: Start difference. First operand 304 states and 382 transitions. Second operand has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:49:14,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:49:14,853 INFO L93 Difference]: Finished difference Result 315 states and 392 transitions. [2024-11-28 04:49:14,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 04:49:14,854 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2024-11-28 04:49:14,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:49:14,855 INFO L225 Difference]: With dead ends: 315 [2024-11-28 04:49:14,855 INFO L226 Difference]: Without dead ends: 315 [2024-11-28 04:49:14,855 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=85, Invalid=471, Unknown=4, NotChecked=90, Total=650 [2024-11-28 04:49:14,856 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 79 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:49:14,856 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 449 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 419 Invalid, 0 Unknown, 230 Unchecked, 1.4s Time] [2024-11-28 04:49:14,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2024-11-28 04:49:14,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 310. [2024-11-28 04:49:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 281 states have (on average 1.309608540925267) internal successors, (368), 292 states have internal predecessors, (368), 7 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-28 04:49:14,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 388 transitions. [2024-11-28 04:49:14,864 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 388 transitions. Word has length 48 [2024-11-28 04:49:14,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:49:14,864 INFO L471 AbstractCegarLoop]: Abstraction has 310 states and 388 transitions. [2024-11-28 04:49:14,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-28 04:49:14,864 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 388 transitions. [2024-11-28 04:49:14,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 04:49:14,865 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:49:14,865 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:49:14,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2024-11-28 04:49:15,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2024-11-28 04:49:15,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 04:49:15,266 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:49:15,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:49:15,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1955468647, now seen corresponding path program 1 times [2024-11-28 04:49:15,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:49:15,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89706794] [2024-11-28 04:49:15,267 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:49:15,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:15,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:49:15,269 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:49:15,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-11-28 04:49:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:49:15,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:49:15,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:49:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 04:49:15,621 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:49:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 04:49:16,061 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:49:16,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89706794] [2024-11-28 04:49:16,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89706794] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:49:16,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:49:16,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2024-11-28 04:49:16,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090250281] [2024-11-28 04:49:16,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:49:16,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-28 04:49:16,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:49:16,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-28 04:49:16,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:49:16,062 INFO L87 Difference]: Start difference. First operand 310 states and 388 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 04:49:16,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:49:16,357 INFO L93 Difference]: Finished difference Result 312 states and 384 transitions. [2024-11-28 04:49:16,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:49:16,358 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 48 [2024-11-28 04:49:16,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:49:16,360 INFO L225 Difference]: With dead ends: 312 [2024-11-28 04:49:16,360 INFO L226 Difference]: Without dead ends: 312 [2024-11-28 04:49:16,360 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:49:16,361 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 4 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:49:16,361 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 282 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:49:16,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2024-11-28 04:49:16,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2024-11-28 04:49:16,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 283 states have (on average 1.2862190812720848) internal successors, (364), 294 states have internal predecessors, (364), 7 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-28 04:49:16,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 384 transitions. [2024-11-28 04:49:16,367 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 384 transitions. Word has length 48 [2024-11-28 04:49:16,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:49:16,367 INFO L471 AbstractCegarLoop]: Abstraction has 312 states and 384 transitions. [2024-11-28 04:49:16,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 11 states have internal predecessors, (52), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-28 04:49:16,367 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 384 transitions. [2024-11-28 04:49:16,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 04:49:16,368 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:49:16,368 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:49:16,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-11-28 04:49:16,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:16,569 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:49:16,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:49:16,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1332432918, now seen corresponding path program 2 times [2024-11-28 04:49:16,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:49:16,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638453737] [2024-11-28 04:49:16,570 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:49:16,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:16,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:49:16,572 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:49:16,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-11-28 04:49:16,763 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:49:16,763 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:49:16,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 04:49:16,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:49:16,822 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 [2024-11-28 04:49:17,342 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 9 treesize of output 3 [2024-11-28 04:49:17,474 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2024-11-28 04:49:17,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2024-11-28 04:49:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:49:17,576 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:49:17,883 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:49:17,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 52 [2024-11-28 04:49:18,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-28 04:49:18,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-28 04:49:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:49:18,832 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:49:18,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638453737] [2024-11-28 04:49:18,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638453737] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:49:18,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:49:18,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-11-28 04:49:18,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460949920] [2024-11-28 04:49:18,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:49:18,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 04:49:18,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:49:18,834 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 04:49:18,834 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-11-28 04:49:18,834 INFO L87 Difference]: Start difference. First operand 312 states and 384 transitions. Second operand has 17 states, 16 states have (on average 4.5625) internal successors, (73), 17 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 04:49:22,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:49:27,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:49:31,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:49:36,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-28 04:49:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:49:36,683 INFO L93 Difference]: Finished difference Result 338 states and 407 transitions. [2024-11-28 04:49:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:49:36,684 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.5625) internal successors, (73), 17 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2024-11-28 04:49:36,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:49:36,686 INFO L225 Difference]: With dead ends: 338 [2024-11-28 04:49:36,686 INFO L226 Difference]: Without dead ends: 338 [2024-11-28 04:49:36,686 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2024-11-28 04:49:36,686 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 142 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 9 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:49:36,686 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 478 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 274 Invalid, 4 Unknown, 0 Unchecked, 17.3s Time] [2024-11-28 04:49:36,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2024-11-28 04:49:36,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 317. [2024-11-28 04:49:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 288 states have (on average 1.28125) internal successors, (369), 299 states have internal predecessors, (369), 7 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-28 04:49:36,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 389 transitions. [2024-11-28 04:49:36,693 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 389 transitions. Word has length 47 [2024-11-28 04:49:36,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:49:36,694 INFO L471 AbstractCegarLoop]: Abstraction has 317 states and 389 transitions. [2024-11-28 04:49:36,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.5625) internal successors, (73), 17 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 04:49:36,694 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 389 transitions. [2024-11-28 04:49:36,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-28 04:49:36,695 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:49:36,695 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:49:36,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2024-11-28 04:49:36,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:36,896 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:49:36,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:49:36,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1047700307, now seen corresponding path program 3 times [2024-11-28 04:49:36,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:49:36,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278257130] [2024-11-28 04:49:36,898 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:49:36,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:36,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:49:36,901 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:49:36,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-11-28 04:49:37,147 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 04:49:37,147 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:49:37,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 04:49:37,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:49:37,270 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 [2024-11-28 04:49:38,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:49:38,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:49:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:49:40,268 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:49:41,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-28 04:49:41,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-11-28 04:49:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:49:42,793 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:49:42,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278257130] [2024-11-28 04:49:42,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278257130] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:49:42,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:49:42,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 25 [2024-11-28 04:49:42,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082904416] [2024-11-28 04:49:42,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:49:42,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 04:49:42,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:49:42,795 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 04:49:42,795 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2024-11-28 04:49:42,795 INFO L87 Difference]: Start difference. First operand 317 states and 389 transitions. Second operand has 26 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 25 states have internal predecessors, (85), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:49:48,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-28 04:49:51,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:49:51,381 INFO L93 Difference]: Finished difference Result 337 states and 407 transitions. [2024-11-28 04:49:51,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 04:49:51,383 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 25 states have internal predecessors, (85), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 48 [2024-11-28 04:49:51,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:49:51,384 INFO L225 Difference]: With dead ends: 337 [2024-11-28 04:49:51,384 INFO L226 Difference]: Without dead ends: 337 [2024-11-28 04:49:51,384 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=163, Invalid=1397, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 04:49:51,385 INFO L435 NwaCegarLoop]: 71 mSDtfsCounter, 167 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 14 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:49:51,385 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 990 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 873 Invalid, 14 Unknown, 0 Unchecked, 6.3s Time] [2024-11-28 04:49:51,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2024-11-28 04:49:51,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 321. [2024-11-28 04:49:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 291 states have (on average 1.2783505154639174) internal successors, (372), 302 states have internal predecessors, (372), 7 states have call successors, (7), 6 states have call predecessors, (7), 9 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-28 04:49:51,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 392 transitions. [2024-11-28 04:49:51,393 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 392 transitions. Word has length 48 [2024-11-28 04:49:51,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:49:51,393 INFO L471 AbstractCegarLoop]: Abstraction has 321 states and 392 transitions. [2024-11-28 04:49:51,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.5416666666666665) internal successors, (85), 25 states have internal predecessors, (85), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:49:51,393 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 392 transitions. [2024-11-28 04:49:51,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 04:49:51,394 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:49:51,394 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:49:51,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2024-11-28 04:49:51,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:51,595 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:49:51,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:49:51,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1881028708, now seen corresponding path program 2 times [2024-11-28 04:49:51,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:49:51,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35754430] [2024-11-28 04:49:51,596 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:49:51,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:49:51,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:49:51,598 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:49:51,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-11-28 04:49:51,820 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:49:51,820 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:49:51,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 04:49:51,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:49:52,046 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 [2024-11-28 04:49:53,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:49:53,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:49:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:49:55,426 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:49:56,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-11-28 04:49:56,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-28 04:49:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:49:59,102 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:49:59,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35754430] [2024-11-28 04:49:59,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35754430] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:49:59,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:49:59,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2024-11-28 04:49:59,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52021487] [2024-11-28 04:49:59,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:49:59,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 04:49:59,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:49:59,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 04:49:59,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 04:49:59,104 INFO L87 Difference]: Start difference. First operand 321 states and 392 transitions. Second operand has 35 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:50:08,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:08,372 INFO L93 Difference]: Finished difference Result 335 states and 405 transitions. [2024-11-28 04:50:08,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 04:50:08,374 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2024-11-28 04:50:08,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:08,375 INFO L225 Difference]: With dead ends: 335 [2024-11-28 04:50:08,375 INFO L226 Difference]: Without dead ends: 335 [2024-11-28 04:50:08,375 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=505, Invalid=2251, Unknown=0, NotChecked=0, Total=2756 [2024-11-28 04:50:08,376 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 310 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 38 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:08,376 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 937 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1199 Invalid, 13 Unknown, 0 Unchecked, 5.7s Time] [2024-11-28 04:50:08,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2024-11-28 04:50:08,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 321. [2024-11-28 04:50:08,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 291 states have (on average 1.2714776632302405) internal successors, (370), 302 states have internal predecessors, (370), 7 states have call successors, (7), 6 states have call predecessors, (7), 9 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-28 04:50:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 390 transitions. [2024-11-28 04:50:08,384 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 390 transitions. Word has length 49 [2024-11-28 04:50:08,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:08,384 INFO L471 AbstractCegarLoop]: Abstraction has 321 states and 390 transitions. [2024-11-28 04:50:08,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:50:08,384 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 390 transitions. [2024-11-28 04:50:08,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 04:50:08,385 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:08,385 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:50:08,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2024-11-28 04:50:08,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:08,586 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:50:08,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:08,587 INFO L85 PathProgramCache]: Analyzing trace with hash 670929111, now seen corresponding path program 2 times [2024-11-28 04:50:08,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:50:08,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423528366] [2024-11-28 04:50:08,587 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:50:08,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:08,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:08,589 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:08,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-11-28 04:50:08,835 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:50:08,835 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:50:08,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 04:50:08,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:09,318 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:50:09,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:50:09,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:50:13,889 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_61| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_61| (select (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_61|) (_ bv0 32))))) is different from true [2024-11-28 04:50:14,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-28 04:50:14,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-28 04:50:14,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2024-11-28 04:50:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2024-11-28 04:50:14,515 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:14,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2024-11-28 04:50:15,161 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:50:15,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423528366] [2024-11-28 04:50:15,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423528366] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:15,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1231025011] [2024-11-28 04:50:15,161 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:50:15,161 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:50:15,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:50:15,164 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:50:15,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2024-11-28 04:50:15,664 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:50:15,664 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:50:15,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 04:50:15,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:15,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:50:16,358 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:50:16,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:50:16,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:50:20,601 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_63| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_63| (select (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_63|) (_ bv0 32))))) is different from true [2024-11-28 04:50:20,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-28 04:50:21,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-11-28 04:50:21,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2024-11-28 04:50:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2024-11-28 04:50:21,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:21,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:50:21,684 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 37 treesize of output 43 [2024-11-28 04:50:22,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1231025011] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:22,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:50:22,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 23 [2024-11-28 04:50:22,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339871576] [2024-11-28 04:50:22,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:22,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 04:50:22,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:50:22,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 04:50:22,055 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=669, Unknown=2, NotChecked=106, Total=870 [2024-11-28 04:50:22,055 INFO L87 Difference]: Start difference. First operand 321 states and 390 transitions. Second operand has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 21 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 04:50:37,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:37,608 INFO L93 Difference]: Finished difference Result 349 states and 423 transitions. [2024-11-28 04:50:37,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 04:50:37,609 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 21 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 50 [2024-11-28 04:50:37,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:37,611 INFO L225 Difference]: With dead ends: 349 [2024-11-28 04:50:37,611 INFO L226 Difference]: Without dead ends: 349 [2024-11-28 04:50:37,611 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=183, Invalid=1302, Unknown=5, NotChecked=150, Total=1640 [2024-11-28 04:50:37,611 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 165 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:37,612 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 731 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 729 Invalid, 0 Unknown, 292 Unchecked, 2.6s Time] [2024-11-28 04:50:37,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-11-28 04:50:37,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 327. [2024-11-28 04:50:37,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 296 states have (on average 1.277027027027027) internal successors, (378), 308 states have internal predecessors, (378), 7 states have call successors, (7), 6 states have call predecessors, (7), 10 states have return successors, (13), 12 states have call predecessors, (13), 7 states have call successors, (13) [2024-11-28 04:50:37,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 398 transitions. [2024-11-28 04:50:37,616 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 398 transitions. Word has length 50 [2024-11-28 04:50:37,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:37,617 INFO L471 AbstractCegarLoop]: Abstraction has 327 states and 398 transitions. [2024-11-28 04:50:37,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 21 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-28 04:50:37,617 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 398 transitions. [2024-11-28 04:50:37,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-28 04:50:37,617 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:37,617 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:50:37,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (72)] Forceful destruction successful, exit code 0 [2024-11-28 04:50:37,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2024-11-28 04:50:38,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:38,018 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:50:38,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:38,019 INFO L85 PathProgramCache]: Analyzing trace with hash 670929112, now seen corresponding path program 1 times [2024-11-28 04:50:38,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:50:38,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557502063] [2024-11-28 04:50:38,019 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:38,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:38,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:38,022 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:38,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-11-28 04:50:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:38,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 04:50:38,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 04:50:39,209 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:39,809 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:50:39,810 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 27 treesize of output 31 [2024-11-28 04:50:40,954 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 04:50:40,954 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:50:40,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557502063] [2024-11-28 04:50:40,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557502063] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:50:40,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:50:40,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2024-11-28 04:50:40,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092663111] [2024-11-28 04:50:40,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:40,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 04:50:40,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:50:40,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 04:50:40,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-28 04:50:40,955 INFO L87 Difference]: Start difference. First operand 327 states and 398 transitions. Second operand has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:50:44,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:44,262 INFO L93 Difference]: Finished difference Result 380 states and 465 transitions. [2024-11-28 04:50:44,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 04:50:44,263 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2024-11-28 04:50:44,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:44,264 INFO L225 Difference]: With dead ends: 380 [2024-11-28 04:50:44,264 INFO L226 Difference]: Without dead ends: 380 [2024-11-28 04:50:44,264 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:50:44,265 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 102 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:44,265 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 686 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-28 04:50:44,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2024-11-28 04:50:44,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 348. [2024-11-28 04:50:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 316 states have (on average 1.2721518987341771) internal successors, (402), 327 states have internal predecessors, (402), 8 states have call successors, (8), 6 states have call predecessors, (8), 10 states have return successors, (15), 14 states have call predecessors, (15), 8 states have call successors, (15) [2024-11-28 04:50:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 425 transitions. [2024-11-28 04:50:44,270 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 425 transitions. Word has length 50 [2024-11-28 04:50:44,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:44,270 INFO L471 AbstractCegarLoop]: Abstraction has 348 states and 425 transitions. [2024-11-28 04:50:44,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:50:44,271 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 425 transitions. [2024-11-28 04:50:44,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 04:50:44,272 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:44,272 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:50:44,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-11-28 04:50:44,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:44,473 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:50:44,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:44,473 INFO L85 PathProgramCache]: Analyzing trace with hash 567785081, now seen corresponding path program 2 times [2024-11-28 04:50:44,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:50:44,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184831582] [2024-11-28 04:50:44,473 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:50:44,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:44,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:44,475 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:44,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-11-28 04:50:44,687 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:50:44,687 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:50:44,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 04:50:44,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:45,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:50:45,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 04:50:45,631 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2024-11-28 04:50:45,631 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 11 treesize of output 7 [2024-11-28 04:50:47,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:50:47,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 7 [2024-11-28 04:50:47,515 WARN L873 $PredicateComparison]: unable to prove that (and (= (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)) (_ bv0 1)) (exists ((v_DerPreprocessor_17 (_ BitVec 1)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_47| (_ BitVec 32))) (and (= (_ bv0 1) (bvadd (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_47| v_DerPreprocessor_17) (_ bv0 32) (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_47|) v_DerPreprocessor_17)) (= (store (store |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32) (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_47| (_ bv0 1)) |c_#valid|) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_47|) (_ bv0 1))))) is different from true [2024-11-28 04:50:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:50:47,541 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:49,458 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 50 treesize of output 46 [2024-11-28 04:50:49,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 503 treesize of output 487 [2024-11-28 04:51:36,890 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:36,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184831582] [2024-11-28 04:51:36,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184831582] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:36,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [629810267] [2024-11-28 04:51:36,890 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:51:36,890 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:51:36,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:51:36,893 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:51:36,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2024-11-28 04:51:37,361 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:51:37,362 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:37,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 04:51:37,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:37,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:51:37,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 04:51:37,965 INFO L349 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2024-11-28 04:51:37,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 18 [2024-11-28 04:51:37,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-28 04:51:39,400 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:51:39,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 7 [2024-11-28 04:51:39,919 WARN L873 $PredicateComparison]: unable to prove that (and (= (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)) (_ bv0 1)) (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_50| (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 1))) (and (= (store (store |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32) (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_50| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (bvadd v_DerPreprocessor_21 (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_50| v_DerPreprocessor_21) (_ bv0 32) (_ bv0 1)) |v_ULTIMATE.start_entry_point_~array~0#1.base_50|))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~array~0#1.base_50|))))) is different from true [2024-11-28 04:51:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:51:39,947 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:41,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [629810267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:41,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:51:41,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 20 [2024-11-28 04:51:41,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531200245] [2024-11-28 04:51:41,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:41,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 04:51:41,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:51:41,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 04:51:41,167 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1224, Unknown=10, NotChecked=146, Total=1560 [2024-11-28 04:51:41,167 INFO L87 Difference]: Start difference. First operand 348 states and 425 transitions. Second operand has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:51:45,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:45,908 INFO L93 Difference]: Finished difference Result 350 states and 426 transitions. [2024-11-28 04:51:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 04:51:45,908 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2024-11-28 04:51:45,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:45,910 INFO L225 Difference]: With dead ends: 350 [2024-11-28 04:51:45,910 INFO L226 Difference]: Without dead ends: 325 [2024-11-28 04:51:45,910 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 118 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 52.6s TimeCoverageRelationStatistics Valid=346, Invalid=2304, Unknown=10, NotChecked=202, Total=2862 [2024-11-28 04:51:45,910 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 111 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:45,910 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 493 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 554 Invalid, 0 Unknown, 212 Unchecked, 2.6s Time] [2024-11-28 04:51:45,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-11-28 04:51:45,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2024-11-28 04:51:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 294 states have (on average 1.2857142857142858) internal successors, (378), 305 states have internal predecessors, (378), 8 states have call successors, (8), 6 states have call predecessors, (8), 9 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-28 04:51:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 400 transitions. [2024-11-28 04:51:45,915 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 400 transitions. Word has length 49 [2024-11-28 04:51:45,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:45,915 INFO L471 AbstractCegarLoop]: Abstraction has 325 states and 400 transitions. [2024-11-28 04:51:45,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:51:45,915 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 400 transitions. [2024-11-28 04:51:45,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 04:51:45,916 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:45,916 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:45,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2024-11-28 04:51:46,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (75)] Ended with exit code 0 [2024-11-28 04:51:46,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 04:51:46,317 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:51:46,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:46,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1457755836, now seen corresponding path program 5 times [2024-11-28 04:51:46,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:51:46,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895494193] [2024-11-28 04:51:46,317 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:51:46,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:46,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:46,319 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:46,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-11-28 04:51:46,872 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 04:51:46,872 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:46,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 04:51:46,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:47,003 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 [2024-11-28 04:51:48,863 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2024-11-28 04:51:48,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:51:48,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:51:48,938 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:51:48,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:51:49,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:51:49,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:51:49,565 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:51:49,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:51:50,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:51:50,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:51:50,361 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:51:50,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:51:50,585 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 6 not checked. [2024-11-28 04:51:50,585 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:51,358 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:51:51,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895494193] [2024-11-28 04:51:51,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895494193] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:51,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [48874967] [2024-11-28 04:51:51,358 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:51:51,358 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:51:51,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:51:51,360 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:51:51,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (77)] Waiting until timeout for monitored process [2024-11-28 04:51:51,933 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 04:51:51,934 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:51,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 04:51:51,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:51,960 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 [2024-11-28 04:51:54,550 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#valid)| |ldv_malloc_#res.base| (select |c_#valid| |ldv_malloc_#res.base|)) |c_#valid|) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2024-11-28 04:51:54,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:51:54,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:51:54,734 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-28 04:51:54,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-11-28 04:51:55,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:51:55,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:51:55,110 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:51:55,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:51:55,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:51:55,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:51:55,501 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:51:55,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:51:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 8 trivial. 10 not checked. [2024-11-28 04:51:55,588 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:00,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [48874967] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:52:00,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:00,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 35 [2024-11-28 04:52:00,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767499201] [2024-11-28 04:52:00,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:00,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 04:52:00,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:00,203 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 04:52:00,203 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1116, Unknown=2, NotChecked=138, Total=1406 [2024-11-28 04:52:00,203 INFO L87 Difference]: Start difference. First operand 325 states and 400 transitions. Second operand has 36 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 34 states have internal predecessors, (60), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:52:06,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:06,125 INFO L93 Difference]: Finished difference Result 453 states and 555 transitions. [2024-11-28 04:52:06,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 04:52:06,127 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 34 states have internal predecessors, (60), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 52 [2024-11-28 04:52:06,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:06,128 INFO L225 Difference]: With dead ends: 453 [2024-11-28 04:52:06,128 INFO L226 Difference]: Without dead ends: 453 [2024-11-28 04:52:06,128 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=223, Invalid=1675, Unknown=2, NotChecked=170, Total=2070 [2024-11-28 04:52:06,129 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 197 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:06,129 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 972 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1231 Invalid, 0 Unknown, 324 Unchecked, 4.6s Time] [2024-11-28 04:52:06,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2024-11-28 04:52:06,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 343. [2024-11-28 04:52:06,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 309 states have (on average 1.2750809061488673) internal successors, (394), 320 states have internal predecessors, (394), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (20), 16 states have call predecessors, (20), 11 states have call successors, (20) [2024-11-28 04:52:06,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 425 transitions. [2024-11-28 04:52:06,135 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 425 transitions. Word has length 52 [2024-11-28 04:52:06,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:06,136 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 425 transitions. [2024-11-28 04:52:06,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 34 states have internal predecessors, (60), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:52:06,136 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 425 transitions. [2024-11-28 04:52:06,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 04:52:06,136 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:06,137 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:06,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (77)] Ended with exit code 0 [2024-11-28 04:52:06,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2024-11-28 04:52:06,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:06,537 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:52:06,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:06,538 INFO L85 PathProgramCache]: Analyzing trace with hash -676033960, now seen corresponding path program 1 times [2024-11-28 04:52:06,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:06,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304412178] [2024-11-28 04:52:06,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:06,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:06,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:06,540 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:06,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-11-28 04:52:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:06,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 04:52:06,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:07,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:52:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 04:52:07,879 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:08,217 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 42 treesize of output 36 [2024-11-28 04:52:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 04:52:08,973 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:08,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304412178] [2024-11-28 04:52:08,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304412178] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:08,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:08,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2024-11-28 04:52:08,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35240604] [2024-11-28 04:52:08,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:08,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 04:52:08,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:08,974 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 04:52:08,974 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-11-28 04:52:08,974 INFO L87 Difference]: Start difference. First operand 343 states and 425 transitions. Second operand has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 17 states have internal predecessors, (65), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:52:11,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:11,367 INFO L93 Difference]: Finished difference Result 380 states and 464 transitions. [2024-11-28 04:52:11,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:52:11,368 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 17 states have internal predecessors, (65), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2024-11-28 04:52:11,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:11,369 INFO L225 Difference]: With dead ends: 380 [2024-11-28 04:52:11,369 INFO L226 Difference]: Without dead ends: 380 [2024-11-28 04:52:11,370 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-11-28 04:52:11,370 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 141 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:11,370 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 802 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-28 04:52:11,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2024-11-28 04:52:11,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 351. [2024-11-28 04:52:11,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 317 states have (on average 1.277602523659306) internal successors, (405), 328 states have internal predecessors, (405), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (20), 16 states have call predecessors, (20), 11 states have call successors, (20) [2024-11-28 04:52:11,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 436 transitions. [2024-11-28 04:52:11,375 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 436 transitions. Word has length 51 [2024-11-28 04:52:11,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:11,375 INFO L471 AbstractCegarLoop]: Abstraction has 351 states and 436 transitions. [2024-11-28 04:52:11,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 17 states have internal predecessors, (65), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:52:11,375 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 436 transitions. [2024-11-28 04:52:11,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 04:52:11,376 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:11,376 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:11,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2024-11-28 04:52:11,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:11,577 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:52:11,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:11,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1567579533, now seen corresponding path program 1 times [2024-11-28 04:52:11,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:11,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395404463] [2024-11-28 04:52:11,577 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:11,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:11,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:11,579 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:11,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-11-28 04:52:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:11,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:52:11,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 04:52:11,988 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:12,054 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-28 04:52:12,054 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 16 treesize of output 15 [2024-11-28 04:52:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 04:52:12,191 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:12,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395404463] [2024-11-28 04:52:12,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395404463] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:12,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:12,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2024-11-28 04:52:12,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703100298] [2024-11-28 04:52:12,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:12,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:52:12,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:12,192 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:52:12,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:52:12,192 INFO L87 Difference]: Start difference. First operand 351 states and 436 transitions. Second operand has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:52:12,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:12,589 INFO L93 Difference]: Finished difference Result 363 states and 448 transitions. [2024-11-28 04:52:12,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:52:12,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2024-11-28 04:52:12,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:12,590 INFO L225 Difference]: With dead ends: 363 [2024-11-28 04:52:12,590 INFO L226 Difference]: Without dead ends: 363 [2024-11-28 04:52:12,590 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:52:12,591 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 37 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:12,591 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 156 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:52:12,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2024-11-28 04:52:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 348. [2024-11-28 04:52:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 314 states have (on average 1.2707006369426752) internal successors, (399), 325 states have internal predecessors, (399), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (20), 16 states have call predecessors, (20), 11 states have call successors, (20) [2024-11-28 04:52:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 430 transitions. [2024-11-28 04:52:12,596 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 430 transitions. Word has length 51 [2024-11-28 04:52:12,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:12,597 INFO L471 AbstractCegarLoop]: Abstraction has 348 states and 430 transitions. [2024-11-28 04:52:12,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.75) internal successors, (35), 5 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 04:52:12,597 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 430 transitions. [2024-11-28 04:52:12,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-28 04:52:12,597 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:12,597 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:12,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2024-11-28 04:52:12,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:12,798 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:52:12,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:12,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1567579532, now seen corresponding path program 1 times [2024-11-28 04:52:12,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:12,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342320929] [2024-11-28 04:52:12,799 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:12,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:12,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:12,802 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:12,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2024-11-28 04:52:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:13,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-28 04:52:13,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 04:52:13,762 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:14,618 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:52:14,619 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 29 [2024-11-28 04:52:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 04:52:15,323 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:15,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342320929] [2024-11-28 04:52:15,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342320929] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:15,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:15,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2024-11-28 04:52:15,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34414043] [2024-11-28 04:52:15,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:15,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 04:52:15,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:15,324 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 04:52:15,325 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:52:15,325 INFO L87 Difference]: Start difference. First operand 348 states and 430 transitions. Second operand has 16 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:52:17,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:17,049 INFO L93 Difference]: Finished difference Result 373 states and 452 transitions. [2024-11-28 04:52:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 04:52:17,050 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2024-11-28 04:52:17,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:17,051 INFO L225 Difference]: With dead ends: 373 [2024-11-28 04:52:17,051 INFO L226 Difference]: Without dead ends: 373 [2024-11-28 04:52:17,052 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:52:17,052 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 205 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:17,052 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 388 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-28 04:52:17,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2024-11-28 04:52:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 348. [2024-11-28 04:52:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 314 states have (on average 1.2579617834394905) internal successors, (395), 325 states have internal predecessors, (395), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (20), 16 states have call predecessors, (20), 11 states have call successors, (20) [2024-11-28 04:52:17,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 426 transitions. [2024-11-28 04:52:17,059 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 426 transitions. Word has length 51 [2024-11-28 04:52:17,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:17,059 INFO L471 AbstractCegarLoop]: Abstraction has 348 states and 426 transitions. [2024-11-28 04:52:17,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:52:17,059 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 426 transitions. [2024-11-28 04:52:17,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 04:52:17,060 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:17,060 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:17,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2024-11-28 04:52:17,261 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:17,261 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:52:17,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:17,261 INFO L85 PathProgramCache]: Analyzing trace with hash 517783863, now seen corresponding path program 1 times [2024-11-28 04:52:17,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:17,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585375080] [2024-11-28 04:52:17,262 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:17,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:17,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:17,264 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:17,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2024-11-28 04:52:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:17,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:52:17,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:18,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:52:18,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-28 04:52:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-28 04:52:18,865 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:19,313 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 42 treesize of output 36 [2024-11-28 04:52:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 04:52:20,212 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:20,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585375080] [2024-11-28 04:52:20,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585375080] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:20,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:20,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2024-11-28 04:52:20,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085354921] [2024-11-28 04:52:20,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:20,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:52:20,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:20,213 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:52:20,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:52:20,214 INFO L87 Difference]: Start difference. First operand 348 states and 426 transitions. Second operand has 21 states, 20 states have (on average 3.4) internal successors, (68), 18 states have internal predecessors, (68), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:52:24,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:24,918 INFO L93 Difference]: Finished difference Result 375 states and 449 transitions. [2024-11-28 04:52:24,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 04:52:24,920 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 18 states have internal predecessors, (68), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 52 [2024-11-28 04:52:24,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:24,921 INFO L225 Difference]: With dead ends: 375 [2024-11-28 04:52:24,921 INFO L226 Difference]: Without dead ends: 375 [2024-11-28 04:52:24,921 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:52:24,922 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 105 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:24,922 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 880 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-28 04:52:24,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-11-28 04:52:24,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 349. [2024-11-28 04:52:24,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 315 states have (on average 1.2603174603174603) internal successors, (397), 326 states have internal predecessors, (397), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (20), 16 states have call predecessors, (20), 11 states have call successors, (20) [2024-11-28 04:52:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 428 transitions. [2024-11-28 04:52:24,927 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 428 transitions. Word has length 52 [2024-11-28 04:52:24,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:24,927 INFO L471 AbstractCegarLoop]: Abstraction has 349 states and 428 transitions. [2024-11-28 04:52:24,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 18 states have internal predecessors, (68), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:52:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 428 transitions. [2024-11-28 04:52:24,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-28 04:52:24,928 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:24,928 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:24,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2024-11-28 04:52:25,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:25,129 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:52:25,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:25,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1287785509, now seen corresponding path program 3 times [2024-11-28 04:52:25,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:25,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581894342] [2024-11-28 04:52:25,129 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:52:25,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:25,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:25,132 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:25,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-11-28 04:52:25,432 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 04:52:25,432 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:25,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 04:52:25,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:25,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-28 04:52:26,537 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 11 treesize of output 7 [2024-11-28 04:52:26,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:52:29,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 04:52:29,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-28 04:52:29,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2024-11-28 04:52:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:52:29,426 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:29,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-11-28 04:52:31,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2024-11-28 04:52:31,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2024-11-28 04:52:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:52:33,360 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:52:33,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581894342] [2024-11-28 04:52:33,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581894342] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:33,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:33,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 31 [2024-11-28 04:52:33,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774405588] [2024-11-28 04:52:33,360 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:33,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 04:52:33,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:52:33,361 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 04:52:33,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2024-11-28 04:52:33,362 INFO L87 Difference]: Start difference. First operand 349 states and 428 transitions. Second operand has 32 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 30 states have internal predecessors, (94), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:52:38,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-28 04:52:46,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:46,760 INFO L93 Difference]: Finished difference Result 371 states and 452 transitions. [2024-11-28 04:52:46,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 04:52:46,761 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 30 states have internal predecessors, (94), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2024-11-28 04:52:46,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:46,762 INFO L225 Difference]: With dead ends: 371 [2024-11-28 04:52:46,762 INFO L226 Difference]: Without dead ends: 371 [2024-11-28 04:52:46,762 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=258, Invalid=2292, Unknown=0, NotChecked=0, Total=2550 [2024-11-28 04:52:46,763 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 188 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:46,763 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 937 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1137 Invalid, 1 Unknown, 0 Unchecked, 9.4s Time] [2024-11-28 04:52:46,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2024-11-28 04:52:46,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 349. [2024-11-28 04:52:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 315 states have (on average 1.2571428571428571) internal successors, (396), 326 states have internal predecessors, (396), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (20), 16 states have call predecessors, (20), 11 states have call successors, (20) [2024-11-28 04:52:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 427 transitions. [2024-11-28 04:52:46,768 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 427 transitions. Word has length 52 [2024-11-28 04:52:46,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:46,768 INFO L471 AbstractCegarLoop]: Abstraction has 349 states and 427 transitions. [2024-11-28 04:52:46,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.1333333333333333) internal successors, (94), 30 states have internal predecessors, (94), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:52:46,769 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 427 transitions. [2024-11-28 04:52:46,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 04:52:46,769 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:46,769 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:46,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2024-11-28 04:52:46,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:46,970 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:52:46,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:46,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1128569286, now seen corresponding path program 1 times [2024-11-28 04:52:46,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:52:46,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709397621] [2024-11-28 04:52:46,971 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:46,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:46,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:46,973 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:46,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2024-11-28 04:52:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:47,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 04:52:47,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:47,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:52:47,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:52:47,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-28 04:52:48,227 INFO L349 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2024-11-28 04:52:48,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2024-11-28 04:52:48,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2024-11-28 04:52:49,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 22 [2024-11-28 04:52:49,489 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:52:49,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2024-11-28 04:52:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 04:52:49,584 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:06,186 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:53:06,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709397621] [2024-11-28 04:53:06,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709397621] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:06,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1865040393] [2024-11-28 04:53:06,186 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:53:06,187 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:53:06,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:53:06,189 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:53:06,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (84)] Waiting until timeout for monitored process [2024-11-28 04:53:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:53:06,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 04:53:06,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:07,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:53:07,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:53:07,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-11-28 04:53:07,510 INFO L349 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2024-11-28 04:53:07,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2024-11-28 04:53:07,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2024-11-28 04:53:08,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 22 [2024-11-28 04:53:08,101 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:53:08,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2024-11-28 04:53:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:53:08,122 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:29,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1865040393] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:29,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:53:29,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 20 [2024-11-28 04:53:29,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656281784] [2024-11-28 04:53:29,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:29,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:53:29,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:53:29,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:53:29,627 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=714, Unknown=8, NotChecked=0, Total=812 [2024-11-28 04:53:29,627 INFO L87 Difference]: Start difference. First operand 349 states and 427 transitions. Second operand has 21 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 04:53:33,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:53:33,344 INFO L93 Difference]: Finished difference Result 355 states and 432 transitions. [2024-11-28 04:53:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 04:53:33,346 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 53 [2024-11-28 04:53:33,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:53:33,347 INFO L225 Difference]: With dead ends: 355 [2024-11-28 04:53:33,348 INFO L226 Difference]: Without dead ends: 355 [2024-11-28 04:53:33,348 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 39.5s TimeCoverageRelationStatistics Valid=143, Invalid=1109, Unknown=8, NotChecked=0, Total=1260 [2024-11-28 04:53:33,348 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 70 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:53:33,348 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 711 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-28 04:53:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2024-11-28 04:53:33,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 354. [2024-11-28 04:53:33,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 320 states have (on average 1.253125) internal successors, (401), 331 states have internal predecessors, (401), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (20), 16 states have call predecessors, (20), 11 states have call successors, (20) [2024-11-28 04:53:33,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 432 transitions. [2024-11-28 04:53:33,356 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 432 transitions. Word has length 53 [2024-11-28 04:53:33,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:53:33,357 INFO L471 AbstractCegarLoop]: Abstraction has 354 states and 432 transitions. [2024-11-28 04:53:33,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 04:53:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 432 transitions. [2024-11-28 04:53:33,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 04:53:33,364 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:53:33,364 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:53:33,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (84)] Ended with exit code 0 [2024-11-28 04:53:33,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2024-11-28 04:53:33,765 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:33,765 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:53:33,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:53:33,766 INFO L85 PathProgramCache]: Analyzing trace with hash -455163, now seen corresponding path program 6 times [2024-11-28 04:53:33,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:53:33,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590806008] [2024-11-28 04:53:33,766 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:53:33,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:53:33,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:53:33,768 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:53:33,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2024-11-28 04:53:34,498 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-28 04:53:34,498 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:34,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-28 04:53:34,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:34,688 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 [2024-11-28 04:53:36,481 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2024-11-28 04:53:36,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:53:36,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:53:36,570 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:53:36,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:53:37,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:53:37,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:53:37,211 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:53:37,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:53:37,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:53:37,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:53:37,882 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:53:37,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:53:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 12 trivial. 6 not checked. [2024-11-28 04:53:38,130 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:46,911 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:53:46,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590806008] [2024-11-28 04:53:46,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590806008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:46,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2013437391] [2024-11-28 04:53:46,911 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:53:46,911 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:53:46,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:53:46,913 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:53:46,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2024-11-28 04:53:47,552 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-28 04:53:47,552 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:53:47,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-28 04:53:47,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:53:47,629 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 [2024-11-28 04:53:47,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:53:50,402 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 04:53:50,402 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 21 treesize of output 18 [2024-11-28 04:53:50,480 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:53:50,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:53:51,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:53:51,658 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 21 treesize of output 14 [2024-11-28 04:53:51,716 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:53:51,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:53:52,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:53:52,809 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 21 treesize of output 14 [2024-11-28 04:53:52,893 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:53:52,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:53:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 10 trivial. 8 not checked. [2024-11-28 04:53:53,350 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:53:54,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2013437391] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:53:54,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:53:54,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 37 [2024-11-28 04:53:54,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758720138] [2024-11-28 04:53:54,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:53:54,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-28 04:53:54,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:53:54,043 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-28 04:53:54,043 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1338, Unknown=3, NotChecked=74, Total=1560 [2024-11-28 04:53:54,044 INFO L87 Difference]: Start difference. First operand 354 states and 432 transitions. Second operand has 38 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 7 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-28 04:54:06,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:06,330 INFO L93 Difference]: Finished difference Result 372 states and 449 transitions. [2024-11-28 04:54:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-28 04:54:06,331 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 7 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 55 [2024-11-28 04:54:06,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:06,332 INFO L225 Difference]: With dead ends: 372 [2024-11-28 04:54:06,332 INFO L226 Difference]: Without dead ends: 372 [2024-11-28 04:54:06,332 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=427, Invalid=3996, Unknown=3, NotChecked=130, Total=4556 [2024-11-28 04:54:06,332 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 140 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:06,333 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1128 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1594 Invalid, 0 Unknown, 188 Unchecked, 6.8s Time] [2024-11-28 04:54:06,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2024-11-28 04:54:06,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 336. [2024-11-28 04:54:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 305 states have (on average 1.259016393442623) internal successors, (384), 316 states have internal predecessors, (384), 8 states have call successors, (8), 6 states have call predecessors, (8), 9 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) [2024-11-28 04:54:06,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 406 transitions. [2024-11-28 04:54:06,336 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 406 transitions. Word has length 55 [2024-11-28 04:54:06,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:06,336 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 406 transitions. [2024-11-28 04:54:06,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 7 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-28 04:54:06,336 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 406 transitions. [2024-11-28 04:54:06,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-28 04:54:06,337 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:06,337 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:06,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2024-11-28 04:54:06,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (86)] Ended with exit code 0 [2024-11-28 04:54:06,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt [2024-11-28 04:54:06,737 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:54:06,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:06,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1266645036, now seen corresponding path program 4 times [2024-11-28 04:54:06,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:54:06,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454834697] [2024-11-28 04:54:06,738 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:54:06,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:06,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:06,740 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:06,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2024-11-28 04:54:06,987 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:54:06,987 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:06,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 04:54:06,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:54:07,980 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:54:09,071 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:54:09,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454834697] [2024-11-28 04:54:09,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454834697] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:09,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:54:09,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2024-11-28 04:54:09,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647918136] [2024-11-28 04:54:09,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:09,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 04:54:09,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:54:09,072 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 04:54:09,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:54:09,072 INFO L87 Difference]: Start difference. First operand 336 states and 406 transitions. Second operand has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:54:10,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:10,863 INFO L93 Difference]: Finished difference Result 515 states and 625 transitions. [2024-11-28 04:54:10,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 04:54:10,864 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 53 [2024-11-28 04:54:10,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:10,866 INFO L225 Difference]: With dead ends: 515 [2024-11-28 04:54:10,866 INFO L226 Difference]: Without dead ends: 515 [2024-11-28 04:54:10,866 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:54:10,867 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 125 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:10,867 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 865 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 04:54:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2024-11-28 04:54:10,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 483. [2024-11-28 04:54:10,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 447 states have (on average 1.2684563758389262) internal successors, (567), 454 states have internal predecessors, (567), 13 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (24), 22 states have call predecessors, (24), 13 states have call successors, (24) [2024-11-28 04:54:10,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 604 transitions. [2024-11-28 04:54:10,877 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 604 transitions. Word has length 53 [2024-11-28 04:54:10,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:10,878 INFO L471 AbstractCegarLoop]: Abstraction has 483 states and 604 transitions. [2024-11-28 04:54:10,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:54:10,878 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 604 transitions. [2024-11-28 04:54:10,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 04:54:10,879 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:10,879 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:10,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2024-11-28 04:54:11,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:11,080 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:54:11,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:11,080 INFO L85 PathProgramCache]: Analyzing trace with hash -582377698, now seen corresponding path program 1 times [2024-11-28 04:54:11,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:54:11,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123107015] [2024-11-28 04:54:11,081 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:11,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:11,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:11,083 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:11,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2024-11-28 04:54:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:11,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 04:54:11,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:12,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-28 04:54:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 04:54:12,509 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:12,875 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 29 [2024-11-28 04:54:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 04:54:14,080 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:54:14,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123107015] [2024-11-28 04:54:14,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123107015] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:14,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:54:14,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-11-28 04:54:14,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384401422] [2024-11-28 04:54:14,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:14,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:54:14,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:54:14,081 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:54:14,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:54:14,082 INFO L87 Difference]: Start difference. First operand 483 states and 604 transitions. Second operand has 21 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:54:18,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:18,028 INFO L93 Difference]: Finished difference Result 573 states and 721 transitions. [2024-11-28 04:54:18,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 04:54:18,030 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 54 [2024-11-28 04:54:18,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:18,032 INFO L225 Difference]: With dead ends: 573 [2024-11-28 04:54:18,032 INFO L226 Difference]: Without dead ends: 573 [2024-11-28 04:54:18,032 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 04:54:18,032 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 160 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:18,033 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 592 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-28 04:54:18,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2024-11-28 04:54:18,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 535. [2024-11-28 04:54:18,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 499 states have (on average 1.2585170340681362) internal successors, (628), 504 states have internal predecessors, (628), 13 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (24), 24 states have call predecessors, (24), 13 states have call successors, (24) [2024-11-28 04:54:18,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 665 transitions. [2024-11-28 04:54:18,043 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 665 transitions. Word has length 54 [2024-11-28 04:54:18,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:18,044 INFO L471 AbstractCegarLoop]: Abstraction has 535 states and 665 transitions. [2024-11-28 04:54:18,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:54:18,044 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 665 transitions. [2024-11-28 04:54:18,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-28 04:54:18,045 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:18,045 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:18,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2024-11-28 04:54:18,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:18,245 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:54:18,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:18,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1100293081, now seen corresponding path program 2 times [2024-11-28 04:54:18,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:54:18,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364130744] [2024-11-28 04:54:18,246 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:54:18,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:18,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:18,248 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:18,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2024-11-28 04:54:18,492 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:54:18,492 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:18,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 04:54:18,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 04:54:19,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-28 04:54:19,871 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:54:19,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364130744] [2024-11-28 04:54:19,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364130744] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:19,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:54:19,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2024-11-28 04:54:19,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244831800] [2024-11-28 04:54:19,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:19,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 04:54:19,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:54:19,872 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 04:54:19,872 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:54:19,873 INFO L87 Difference]: Start difference. First operand 535 states and 665 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:54:20,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:20,603 INFO L93 Difference]: Finished difference Result 570 states and 701 transitions. [2024-11-28 04:54:20,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 04:54:20,605 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 56 [2024-11-28 04:54:20,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:20,606 INFO L225 Difference]: With dead ends: 570 [2024-11-28 04:54:20,606 INFO L226 Difference]: Without dead ends: 570 [2024-11-28 04:54:20,606 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-11-28 04:54:20,607 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 55 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:20,607 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 443 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 04:54:20,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2024-11-28 04:54:20,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 545. [2024-11-28 04:54:20,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 509 states have (on average 1.2455795677799608) internal successors, (634), 514 states have internal predecessors, (634), 13 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (24), 24 states have call predecessors, (24), 13 states have call successors, (24) [2024-11-28 04:54:20,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 671 transitions. [2024-11-28 04:54:20,615 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 671 transitions. Word has length 56 [2024-11-28 04:54:20,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:20,615 INFO L471 AbstractCegarLoop]: Abstraction has 545 states and 671 transitions. [2024-11-28 04:54:20,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 15 states have internal predecessors, (65), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:54:20,615 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 671 transitions. [2024-11-28 04:54:20,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 04:54:20,616 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:20,617 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:20,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2024-11-28 04:54:20,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:20,818 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:54:20,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:20,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1767915786, now seen corresponding path program 3 times [2024-11-28 04:54:20,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:54:20,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163089952] [2024-11-28 04:54:20,819 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:54:20,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:20,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:20,821 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:20,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2024-11-28 04:54:21,146 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 04:54:21,146 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:21,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 04:54:21,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:21,342 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 [2024-11-28 04:54:21,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-28 04:54:22,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-28 04:54:28,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:54:28,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 17 [2024-11-28 04:54:28,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2024-11-28 04:54:30,220 INFO L349 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2024-11-28 04:54:30,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2024-11-28 04:54:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:54:32,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:33,143 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 04:54:33,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 52 [2024-11-28 04:54:37,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-28 04:54:37,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2024-11-28 04:54:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-28 04:54:38,135 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:54:38,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163089952] [2024-11-28 04:54:38,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163089952] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:38,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:54:38,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14] total 33 [2024-11-28 04:54:38,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820325521] [2024-11-28 04:54:38,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:38,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 04:54:38,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:54:38,136 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 04:54:38,136 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 04:54:38,136 INFO L87 Difference]: Start difference. First operand 545 states and 671 transitions. Second operand has 34 states, 32 states have (on average 2.875) internal successors, (92), 33 states have internal predecessors, (92), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:54:55,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:55,298 INFO L93 Difference]: Finished difference Result 576 states and 698 transitions. [2024-11-28 04:54:55,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-28 04:54:55,299 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.875) internal successors, (92), 33 states have internal predecessors, (92), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 55 [2024-11-28 04:54:55,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:55,302 INFO L225 Difference]: With dead ends: 576 [2024-11-28 04:54:55,302 INFO L226 Difference]: Without dead ends: 576 [2024-11-28 04:54:55,302 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=388, Invalid=2692, Unknown=0, NotChecked=0, Total=3080 [2024-11-28 04:54:55,303 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 148 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:55,303 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 765 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1064 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2024-11-28 04:54:55,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2024-11-28 04:54:55,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 565. [2024-11-28 04:54:55,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 529 states have (on average 1.2457466918714555) internal successors, (659), 534 states have internal predecessors, (659), 13 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (24), 24 states have call predecessors, (24), 13 states have call successors, (24) [2024-11-28 04:54:55,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 696 transitions. [2024-11-28 04:54:55,314 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 696 transitions. Word has length 55 [2024-11-28 04:54:55,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:55,314 INFO L471 AbstractCegarLoop]: Abstraction has 565 states and 696 transitions. [2024-11-28 04:54:55,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.875) internal successors, (92), 33 states have internal predecessors, (92), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-28 04:54:55,315 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 696 transitions. [2024-11-28 04:54:55,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-28 04:54:55,316 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:55,316 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:55,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2024-11-28 04:54:55,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:55,521 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:54:55,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:55,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1319215036, now seen corresponding path program 1 times [2024-11-28 04:54:55,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:54:55,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326453886] [2024-11-28 04:54:55,522 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:54:55,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:55,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:55,524 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:55,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2024-11-28 04:54:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:55,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 04:54:55,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:56,732 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 11 treesize of output 7 [2024-11-28 04:54:57,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-28 04:54:57,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2024-11-28 04:54:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 04:54:57,291 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:57,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2024-11-28 04:54:57,877 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 38 treesize of output 34 [2024-11-28 04:54:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-28 04:54:59,643 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:54:59,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326453886] [2024-11-28 04:54:59,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326453886] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:59,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:54:59,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2024-11-28 04:54:59,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865591022] [2024-11-28 04:54:59,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:59,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 04:54:59,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:54:59,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 04:54:59,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:54:59,644 INFO L87 Difference]: Start difference. First operand 565 states and 696 transitions. Second operand has 27 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 25 states have internal predecessors, (79), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:55:06,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:55:06,433 INFO L93 Difference]: Finished difference Result 638 states and 798 transitions. [2024-11-28 04:55:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 04:55:06,435 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 25 states have internal predecessors, (79), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 56 [2024-11-28 04:55:06,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:55:06,437 INFO L225 Difference]: With dead ends: 638 [2024-11-28 04:55:06,438 INFO L226 Difference]: Without dead ends: 638 [2024-11-28 04:55:06,438 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=356, Invalid=1806, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 04:55:06,439 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 320 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:55:06,439 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 732 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-28 04:55:06,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2024-11-28 04:55:06,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 574. [2024-11-28 04:55:06,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 538 states have (on average 1.2509293680297398) internal successors, (673), 543 states have internal predecessors, (673), 13 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (24), 24 states have call predecessors, (24), 13 states have call successors, (24) [2024-11-28 04:55:06,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 710 transitions. [2024-11-28 04:55:06,453 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 710 transitions. Word has length 56 [2024-11-28 04:55:06,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:55:06,454 INFO L471 AbstractCegarLoop]: Abstraction has 574 states and 710 transitions. [2024-11-28 04:55:06,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 25 states have internal predecessors, (79), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-28 04:55:06,454 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 710 transitions. [2024-11-28 04:55:06,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-28 04:55:06,456 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:55:06,456 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:55:06,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2024-11-28 04:55:06,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:55:06,657 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2024-11-28 04:55:06,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:55:06,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1319215035, now seen corresponding path program 1 times [2024-11-28 04:55:06,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:55:06,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327243082] [2024-11-28 04:55:06,658 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:55:06,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:55:06,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:55:06,661 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:55:06,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2024-11-28 04:55:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:55:07,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-28 04:55:07,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:55:07,158 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 [2024-11-28 04:55:07,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:55:08,709 WARN L873 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2024-11-28 04:55:08,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 04:55:08,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-28 04:55:08,775 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:55:08,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:55:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2024-11-28 04:55:10,233 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:55:13,644 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:55:13,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327243082] [2024-11-28 04:55:13,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327243082] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:55:13,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2015001118] [2024-11-28 04:55:13,644 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:55:13,644 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-28 04:55:13,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 [2024-11-28 04:55:13,647 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-28 04:55:13,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_65b23b55-ff92-406b-a323-17da9d13078f/bin/uautomizer-verify-aQ6SnzHsRB/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2024-11-28 04:55:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:55:14,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-28 04:55:14,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:55:14,337 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 [2024-11-28 04:55:14,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-28 04:55:15,509 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-28 04:55:15,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-28 04:55:15,584 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-28 04:55:15,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-11-28 04:55:16,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 04:55:17,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-28 04:55:26,555 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 8 treesize of output 4 [2024-11-28 04:55:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:55:27,048 INFO L312 TraceCheckSpWp]: Computing backward predicates...