./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC --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 1df2ca055a97db0a00e0c4b03f212c5ac3c2765d37b628ab5708f179a281754f --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 00:04:37,929 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 00:04:38,058 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-24 00:04:38,067 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 00:04:38,067 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 00:04:38,112 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 00:04:38,113 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 00:04:38,113 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 00:04:38,114 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 00:04:38,114 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 00:04:38,115 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 00:04:38,115 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 00:04:38,115 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 00:04:38,115 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 00:04:38,115 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 00:04:38,116 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 00:04:38,116 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 00:04:38,116 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 00:04:38,116 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 00:04:38,116 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 00:04:38,116 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-24 00:04:38,116 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-24 00:04:38,116 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-24 00:04:38,117 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 00:04:38,117 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-24 00:04:38,117 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-24 00:04:38,117 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 00:04:38,117 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 00:04:38,117 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 00:04:38,117 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 00:04:38,117 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:04:38,117 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:04:38,117 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:04:38,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:04:38,118 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 00:04:38,118 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:04:38,118 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:04:38,120 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:04:38,120 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:04:38,121 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 00:04:38,121 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 00:04:38,121 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 00:04:38,121 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 00:04:38,121 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 00:04:38,122 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 00:04:38,122 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 00:04:38,122 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 00:04:38,122 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_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC 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 -> 1df2ca055a97db0a00e0c4b03f212c5ac3c2765d37b628ab5708f179a281754f [2024-11-24 00:04:38,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 00:04:38,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 00:04:38,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 00:04:38,533 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 00:04:38,535 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 00:04:38,536 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i [2024-11-24 00:04:42,073 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/data/5d78b8568/c211952e2d3e4f6fb8dd290bf6dbe147/FLAGe584bdfd1 [2024-11-24 00:04:42,462 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 00:04:42,463 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i [2024-11-24 00:04:42,482 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/data/5d78b8568/c211952e2d3e4f6fb8dd290bf6dbe147/FLAGe584bdfd1 [2024-11-24 00:04:42,500 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/data/5d78b8568/c211952e2d3e4f6fb8dd290bf6dbe147 [2024-11-24 00:04:42,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 00:04:42,504 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 00:04:42,506 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 00:04:42,506 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 00:04:42,511 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 00:04:42,512 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:04:42" (1/1) ... [2024-11-24 00:04:42,514 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bb598f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:04:42, skipping insertion in model container [2024-11-24 00:04:42,514 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:04:42" (1/1) ... [2024-11-24 00:04:42,558 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 00:04:43,050 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 00:04:43,151 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 00:04:43,156 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 00:04:43,169 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:04:43,187 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) [2024-11-24 00:04:43,187 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@67374e11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:04:43, skipping insertion in model container [2024-11-24 00:04:43,188 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 00:04:43,188 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-11-24 00:04:43,190 INFO L158 Benchmark]: Toolchain (without parser) took 685.24ms. Allocated memory is still 117.4MB. Free memory was 90.9MB in the beginning and 76.9MB in the end (delta: 14.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-24 00:04:43,191 INFO L158 Benchmark]: CDTParser took 0.76ms. Allocated memory is still 117.4MB. Free memory is still 72.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-24 00:04:43,191 INFO L158 Benchmark]: CACSL2BoogieTranslator took 682.43ms. Allocated memory is still 117.4MB. Free memory was 90.6MB in the beginning and 76.9MB in the end (delta: 13.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-24 00:04:43,193 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.76ms. Allocated memory is still 117.4MB. Free memory is still 72.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 682.43ms. Allocated memory is still 117.4MB. Free memory was 90.6MB in the beginning and 76.9MB in the end (delta: 13.7MB). 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_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC --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 1df2ca055a97db0a00e0c4b03f212c5ac3c2765d37b628ab5708f179a281754f --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 00:04:46,252 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 00:04:46,361 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-24 00:04:46,368 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 00:04:46,369 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 00:04:46,420 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 00:04:46,421 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 00:04:46,422 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 00:04:46,422 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 00:04:46,422 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 00:04:46,422 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 00:04:46,422 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 00:04:46,423 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 00:04:46,423 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 00:04:46,423 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 00:04:46,423 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 00:04:46,423 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 00:04:46,424 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 00:04:46,424 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 00:04:46,424 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 00:04:46,424 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-24 00:04:46,424 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-24 00:04:46,424 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-24 00:04:46,424 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 00:04:46,425 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-24 00:04:46,425 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-24 00:04:46,425 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-24 00:04:46,425 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-24 00:04:46,425 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 00:04:46,425 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 00:04:46,429 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 00:04:46,430 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 00:04:46,430 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:04:46,430 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:04:46,430 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:04:46,430 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:04:46,430 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 00:04:46,430 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:04:46,431 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:04:46,431 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:04:46,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:04:46,431 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 00:04:46,431 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 00:04:46,431 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-24 00:04:46,431 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-24 00:04:46,432 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 00:04:46,432 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 00:04:46,432 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 00:04:46,432 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 00:04:46,432 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_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC 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 -> 1df2ca055a97db0a00e0c4b03f212c5ac3c2765d37b628ab5708f179a281754f [2024-11-24 00:04:46,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 00:04:46,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 00:04:46,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 00:04:46,869 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 00:04:46,869 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 00:04:46,870 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i [2024-11-24 00:04:50,534 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/data/cff9180f2/4c7264b79bb74fbc8f237f55cd186dc3/FLAGd1ee9ed94 [2024-11-24 00:04:51,004 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 00:04:51,008 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/sv-benchmarks/c/ldv-memsafety/memleaks_test19-2.i [2024-11-24 00:04:51,033 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/data/cff9180f2/4c7264b79bb74fbc8f237f55cd186dc3/FLAGd1ee9ed94 [2024-11-24 00:04:51,119 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/data/cff9180f2/4c7264b79bb74fbc8f237f55cd186dc3 [2024-11-24 00:04:51,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 00:04:51,124 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 00:04:51,125 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 00:04:51,125 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 00:04:51,132 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 00:04:51,133 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:04:51" (1/1) ... [2024-11-24 00:04:51,135 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@406a75f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:04:51, skipping insertion in model container [2024-11-24 00:04:51,136 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:04:51" (1/1) ... [2024-11-24 00:04:51,183 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 00:04:51,671 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 00:04:51,742 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 00:04:51,748 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 00:04:51,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:04:51,781 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-11-24 00:04:51,794 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 00:04:51,873 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 00:04:51,919 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 00:04:51,921 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 00:04:51,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:04:51,935 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 00:04:52,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:04:52,080 INFO L204 MainTranslator]: Completed translation [2024-11-24 00:04:52,081 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:04:52 WrapperNode [2024-11-24 00:04:52,081 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 00:04:52,082 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 00:04:52,082 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 00:04:52,083 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 00:04:52,093 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:04:52" (1/1) ... [2024-11-24 00:04:52,127 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:04:52" (1/1) ... [2024-11-24 00:04:52,152 INFO L138 Inliner]: procedures = 171, calls = 87, calls flagged for inlining = 25, calls inlined = 7, statements flattened = 76 [2024-11-24 00:04:52,153 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 00:04:52,153 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 00:04:52,154 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 00:04:52,154 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 00:04:52,166 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:04:52" (1/1) ... [2024-11-24 00:04:52,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:04:52" (1/1) ... [2024-11-24 00:04:52,171 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:04:52" (1/1) ... [2024-11-24 00:04:52,195 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 0, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 0, 2]. [2024-11-24 00:04:52,195 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:04:52" (1/1) ... [2024-11-24 00:04:52,195 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:04:52" (1/1) ... [2024-11-24 00:04:52,211 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:04:52" (1/1) ... [2024-11-24 00:04:52,216 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:04:52" (1/1) ... [2024-11-24 00:04:52,219 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:04:52" (1/1) ... [2024-11-24 00:04:52,228 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:04:52" (1/1) ... [2024-11-24 00:04:52,229 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:04:52" (1/1) ... [2024-11-24 00:04:52,237 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 00:04:52,238 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 00:04:52,238 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 00:04:52,238 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 00:04:52,243 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:04:52" (1/1) ... [2024-11-24 00:04:52,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:04:52,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:04:52,290 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 00:04:52,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 00:04:52,332 INFO L130 BoogieDeclarations]: Found specification of procedure f19_undo [2024-11-24 00:04:52,332 INFO L138 BoogieDeclarations]: Found implementation of procedure f19_undo [2024-11-24 00:04:52,333 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2024-11-24 00:04:52,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2024-11-24 00:04:52,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-24 00:04:52,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 00:04:52,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-24 00:04:52,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-24 00:04:52,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-24 00:04:52,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-24 00:04:52,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-24 00:04:52,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-24 00:04:52,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-24 00:04:52,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-24 00:04:52,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-24 00:04:52,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-24 00:04:52,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-24 00:04:52,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 00:04:52,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 00:04:52,544 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 00:04:52,546 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 00:04:53,004 INFO L? ?]: Removed 60 outVars from TransFormulas that were not future-live. [2024-11-24 00:04:53,004 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 00:04:53,024 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 00:04:53,024 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-24 00:04:53,024 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:04:53 BoogieIcfgContainer [2024-11-24 00:04:53,025 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 00:04:53,029 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 00:04:53,029 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 00:04:53,035 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 00:04:53,035 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 12:04:51" (1/3) ... [2024-11-24 00:04:53,036 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56502e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:04:53, skipping insertion in model container [2024-11-24 00:04:53,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:04:52" (2/3) ... [2024-11-24 00:04:53,037 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56502e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:04:53, skipping insertion in model container [2024-11-24 00:04:53,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:04:53" (3/3) ... [2024-11-24 00:04:53,039 INFO L128 eAbstractionObserver]: Analyzing ICFG memleaks_test19-2.i [2024-11-24 00:04:53,062 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 00:04:53,064 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG memleaks_test19-2.i that has 3 procedures, 70 locations, 1 initial locations, 0 loop locations, and 24 error locations. [2024-11-24 00:04:53,126 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 00:04:53,148 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;@211342a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 00:04:53,150 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-24 00:04:53,155 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 64 states have internal predecessors, (69), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-24 00:04:53,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-24 00:04:53,165 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:04:53,166 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:04:53,167 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:04:53,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:04:53,175 INFO L85 PathProgramCache]: Analyzing trace with hash 340389531, now seen corresponding path program 1 times [2024-11-24 00:04:53,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:04:53,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324139700] [2024-11-24 00:04:53,192 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:04:53,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:53,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:04:53,197 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:04:53,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 00:04:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:04:53,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 00:04:53,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:04:53,481 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 [2024-11-24 00:04:53,646 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 [2024-11-24 00:04:53,753 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-24 00:04:53,754 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 [2024-11-24 00:04:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:04:53,779 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:04:53,780 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:04:53,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324139700] [2024-11-24 00:04:53,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324139700] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:04:53,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:04:53,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:04:53,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274882271] [2024-11-24 00:04:53,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:04:53,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:04:53,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:04:53,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:04:53,828 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2024-11-24 00:04:53,830 INFO L87 Difference]: Start difference. First operand has 70 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 64 states have internal predecessors, (69), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-24 00:04:54,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:04:54,200 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2024-11-24 00:04:54,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:04:54,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2024-11-24 00:04:54,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:04:54,213 INFO L225 Difference]: With dead ends: 86 [2024-11-24 00:04:54,214 INFO L226 Difference]: Without dead ends: 84 [2024-11-24 00:04:54,216 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2024-11-24 00:04:54,223 INFO L435 NwaCegarLoop]: 77 mSDtfsCounter, 32 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:04:54,224 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 162 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 104 Unchecked, 0.3s Time] [2024-11-24 00:04:54,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-24 00:04:54,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2024-11-24 00:04:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 68 states have internal predecessors, (80), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-24 00:04:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2024-11-24 00:04:54,292 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 8 [2024-11-24 00:04:54,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:04:54,292 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2024-11-24 00:04:54,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-24 00:04:54,293 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2024-11-24 00:04:54,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-24 00:04:54,295 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:04:54,295 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:04:54,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-24 00:04:54,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:54,496 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:04:54,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:04:54,497 INFO L85 PathProgramCache]: Analyzing trace with hash 340389532, now seen corresponding path program 1 times [2024-11-24 00:04:54,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:04:54,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973926366] [2024-11-24 00:04:54,497 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:04:54,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:54,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:04:54,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:04:54,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 00:04:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:04:54,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-24 00:04:54,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:04:54,651 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 [2024-11-24 00:04:54,663 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 [2024-11-24 00:04:54,796 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 [2024-11-24 00:04:54,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:04:54,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-24 00:04:54,915 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-24 00:04:54,915 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 13 treesize of output 13 [2024-11-24 00:04:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:04:54,937 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:04:54,937 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:04:54,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973926366] [2024-11-24 00:04:54,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973926366] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:04:54,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:04:54,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 00:04:54,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543324108] [2024-11-24 00:04:54,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:04:54,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:04:54,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:04:54,939 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:04:54,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2024-11-24 00:04:54,940 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-24 00:04:55,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:04:55,321 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2024-11-24 00:04:55,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:04:55,322 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2024-11-24 00:04:55,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:04:55,325 INFO L225 Difference]: With dead ends: 84 [2024-11-24 00:04:55,325 INFO L226 Difference]: Without dead ends: 84 [2024-11-24 00:04:55,325 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2024-11-24 00:04:55,326 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 31 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-24 00:04:55,326 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 169 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 127 Invalid, 0 Unknown, 105 Unchecked, 0.4s Time] [2024-11-24 00:04:55,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-24 00:04:55,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2024-11-24 00:04:55,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 69 states have internal predecessors, (82), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-24 00:04:55,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2024-11-24 00:04:55,345 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 8 [2024-11-24 00:04:55,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:04:55,346 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2024-11-24 00:04:55,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-24 00:04:55,347 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2024-11-24 00:04:55,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-24 00:04:55,348 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:04:55,348 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:04:55,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-24 00:04:55,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:55,549 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:04:55,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:04:55,550 INFO L85 PathProgramCache]: Analyzing trace with hash 785062215, now seen corresponding path program 1 times [2024-11-24 00:04:55,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:04:55,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120362308] [2024-11-24 00:04:55,550 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:04:55,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:55,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:04:55,553 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:04:55,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 00:04:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:04:55,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-24 00:04:55,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:04:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:04:55,723 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:04:55,723 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:04:55,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120362308] [2024-11-24 00:04:55,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120362308] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:04:55,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:04:55,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 00:04:55,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973898548] [2024-11-24 00:04:55,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:04:55,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:04:55,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:04:55,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:04:55,725 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:04:55,725 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-24 00:04:55,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:04:55,771 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2024-11-24 00:04:55,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:04:55,772 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-11-24 00:04:55,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:04:55,773 INFO L225 Difference]: With dead ends: 80 [2024-11-24 00:04:55,773 INFO L226 Difference]: Without dead ends: 80 [2024-11-24 00:04:55,774 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:04:55,775 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 10 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:04:55,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 247 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:04:55,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-24 00:04:55,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-11-24 00:04:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 52 states have (on average 1.6346153846153846) internal successors, (85), 72 states have internal predecessors, (85), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-24 00:04:55,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2024-11-24 00:04:55,784 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 15 [2024-11-24 00:04:55,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:04:55,784 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2024-11-24 00:04:55,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-24 00:04:55,784 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2024-11-24 00:04:55,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-24 00:04:55,785 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:04:55,785 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:04:55,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-24 00:04:55,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:55,986 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:04:55,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:04:55,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1103356198, now seen corresponding path program 1 times [2024-11-24 00:04:55,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:04:55,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961300876] [2024-11-24 00:04:55,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:04:55,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:55,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:04:55,990 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:04:55,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 00:04:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:04:56,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 00:04:56,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:04:56,228 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 [2024-11-24 00:04:56,302 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-24 00:04:56,303 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 [2024-11-24 00:04:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:04:56,316 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:04:56,316 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:04:56,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961300876] [2024-11-24 00:04:56,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961300876] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:04:56,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:04:56,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 00:04:56,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779387309] [2024-11-24 00:04:56,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:04:56,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:04:56,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:04:56,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:04:56,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=14, Unknown=1, NotChecked=6, Total=30 [2024-11-24 00:04:56,318 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:04:56,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:04:56,637 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2024-11-24 00:04:56,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 00:04:56,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-11-24 00:04:56,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:04:56,639 INFO L225 Difference]: With dead ends: 82 [2024-11-24 00:04:56,639 INFO L226 Difference]: Without dead ends: 82 [2024-11-24 00:04:56,640 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=20, Unknown=1, NotChecked=8, Total=42 [2024-11-24 00:04:56,641 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 29 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:04:56,641 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 192 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 108 Invalid, 0 Unknown, 99 Unchecked, 0.3s Time] [2024-11-24 00:04:56,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-24 00:04:56,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2024-11-24 00:04:56,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 70 states have internal predecessors, (81), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-24 00:04:56,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2024-11-24 00:04:56,662 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 17 [2024-11-24 00:04:56,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:04:56,662 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2024-11-24 00:04:56,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:04:56,662 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2024-11-24 00:04:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-24 00:04:56,663 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:04:56,666 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:04:56,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-24 00:04:56,866 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:56,867 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:04:56,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:04:56,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1103356199, now seen corresponding path program 1 times [2024-11-24 00:04:56,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:04:56,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479478102] [2024-11-24 00:04:56,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:04:56,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:56,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:04:56,873 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:04:56,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 00:04:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:04:57,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-24 00:04:57,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:04:57,259 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 [2024-11-24 00:04:57,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:04:57,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-24 00:04:57,334 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-24 00:04:57,337 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 [2024-11-24 00:04:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:04:57,369 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:04:57,369 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:04:57,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479478102] [2024-11-24 00:04:57,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479478102] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:04:57,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:04:57,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-24 00:04:57,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028199779] [2024-11-24 00:04:57,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:04:57,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-24 00:04:57,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:04:57,371 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-24 00:04:57,371 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=30, Unknown=1, NotChecked=10, Total=56 [2024-11-24 00:04:57,371 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:04:57,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:04:57,752 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2024-11-24 00:04:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 00:04:57,752 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-11-24 00:04:57,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:04:57,754 INFO L225 Difference]: With dead ends: 79 [2024-11-24 00:04:57,754 INFO L226 Difference]: Without dead ends: 79 [2024-11-24 00:04:57,755 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=38, Unknown=1, NotChecked=12, Total=72 [2024-11-24 00:04:57,756 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 41 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:04:57,756 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 227 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 140 Invalid, 0 Unknown, 102 Unchecked, 0.3s Time] [2024-11-24 00:04:57,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-24 00:04:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2024-11-24 00:04:57,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 52 states have (on average 1.4807692307692308) internal successors, (77), 68 states have internal predecessors, (77), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-24 00:04:57,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2024-11-24 00:04:57,763 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 17 [2024-11-24 00:04:57,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:04:57,763 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2024-11-24 00:04:57,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:04:57,764 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2024-11-24 00:04:57,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-24 00:04:57,764 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:04:57,765 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:04:57,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-24 00:04:57,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:57,965 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:04:57,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:04:57,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1469021879, now seen corresponding path program 1 times [2024-11-24 00:04:57,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:04:57,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214358872] [2024-11-24 00:04:57,966 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:04:57,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:57,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:04:57,968 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:04:57,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 00:04:58,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:04:58,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 00:04:58,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:04:58,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-24 00:04:58,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-11-24 00:04:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:04:58,114 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:04:58,115 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:04:58,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214358872] [2024-11-24 00:04:58,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214358872] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:04:58,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:04:58,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:04:58,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023165659] [2024-11-24 00:04:58,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:04:58,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:04:58,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:04:58,116 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:04:58,116 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:04:58,117 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-24 00:04:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:04:58,230 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2024-11-24 00:04:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:04:58,231 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-24 00:04:58,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:04:58,231 INFO L225 Difference]: With dead ends: 83 [2024-11-24 00:04:58,232 INFO L226 Difference]: Without dead ends: 83 [2024-11-24 00:04:58,232 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-24 00:04:58,232 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 2 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:04:58,233 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 298 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:04:58,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-24 00:04:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2024-11-24 00:04:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 71 states have internal predecessors, (81), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-24 00:04:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2024-11-24 00:04:58,239 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 17 [2024-11-24 00:04:58,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:04:58,239 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2024-11-24 00:04:58,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-24 00:04:58,240 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2024-11-24 00:04:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-24 00:04:58,240 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:04:58,240 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:04:58,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-24 00:04:58,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:58,445 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:04:58,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:04:58,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1762424886, now seen corresponding path program 1 times [2024-11-24 00:04:58,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:04:58,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272090738] [2024-11-24 00:04:58,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:04:58,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:58,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:04:58,448 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:04:58,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 00:04:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:04:58,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 00:04:58,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:04:58,639 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~#a19~0#1.base_7| (_ BitVec 32))) (and (= (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~#a19~0#1.base_7| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~#a19~0#1.base_7|)))) is different from true [2024-11-24 00:04:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:04:58,649 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:04:58,649 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:04:58,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272090738] [2024-11-24 00:04:58,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272090738] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:04:58,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:04:58,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:04:58,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452643712] [2024-11-24 00:04:58,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:04:58,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:04:58,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:04:58,651 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:04:58,651 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2024-11-24 00:04:58,651 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-24 00:04:58,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:04:58,832 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2024-11-24 00:04:58,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:04:58,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-24 00:04:58,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:04:58,834 INFO L225 Difference]: With dead ends: 111 [2024-11-24 00:04:58,834 INFO L226 Difference]: Without dead ends: 105 [2024-11-24 00:04:58,834 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2024-11-24 00:04:58,835 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 36 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:04:58,835 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 185 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 84 Invalid, 0 Unknown, 112 Unchecked, 0.2s Time] [2024-11-24 00:04:58,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-24 00:04:58,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2024-11-24 00:04:58,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 78 states have internal predecessors, (90), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-24 00:04:58,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2024-11-24 00:04:58,842 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 17 [2024-11-24 00:04:58,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:04:58,842 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2024-11-24 00:04:58,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-24 00:04:58,842 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2024-11-24 00:04:58,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-24 00:04:58,843 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:04:58,843 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] [2024-11-24 00:04:58,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-24 00:04:59,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:59,048 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:04:59,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:04:59,048 INFO L85 PathProgramCache]: Analyzing trace with hash -466829256, now seen corresponding path program 1 times [2024-11-24 00:04:59,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:04:59,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624403151] [2024-11-24 00:04:59,048 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:04:59,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:59,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:04:59,050 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:04:59,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 00:04:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:04:59,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-24 00:04:59,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:04:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:04:59,157 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:04:59,157 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:04:59,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624403151] [2024-11-24 00:04:59,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624403151] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:04:59,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:04:59,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:04:59,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758351057] [2024-11-24 00:04:59,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:04:59,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:04:59,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:04:59,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:04:59,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:04:59,159 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:04:59,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:04:59,180 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2024-11-24 00:04:59,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:04:59,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2024-11-24 00:04:59,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:04:59,181 INFO L225 Difference]: With dead ends: 105 [2024-11-24 00:04:59,181 INFO L226 Difference]: Without dead ends: 105 [2024-11-24 00:04:59,181 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:04:59,182 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 13 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:04:59,182 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 199 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:04:59,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-24 00:04:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 94. [2024-11-24 00:04:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.391304347826087) internal successors, (96), 84 states have internal predecessors, (96), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-24 00:04:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2024-11-24 00:04:59,189 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 23 [2024-11-24 00:04:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:04:59,189 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2024-11-24 00:04:59,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:04:59,189 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2024-11-24 00:04:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-24 00:04:59,190 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:04:59,190 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] [2024-11-24 00:04:59,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-24 00:04:59,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:59,390 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:04:59,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:04:59,391 INFO L85 PathProgramCache]: Analyzing trace with hash -466769674, now seen corresponding path program 1 times [2024-11-24 00:04:59,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:04:59,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326377882] [2024-11-24 00:04:59,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:04:59,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:59,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:04:59,393 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:04:59,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-24 00:04:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:04:59,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-24 00:04:59,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:04:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:04:59,514 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:04:59,514 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:04:59,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326377882] [2024-11-24 00:04:59,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326377882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:04:59,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:04:59,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:04:59,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167889580] [2024-11-24 00:04:59,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:04:59,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:04:59,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:04:59,515 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:04:59,515 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:04:59,515 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-11-24 00:04:59,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:04:59,614 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2024-11-24 00:04:59,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:04:59,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 23 [2024-11-24 00:04:59,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:04:59,615 INFO L225 Difference]: With dead ends: 96 [2024-11-24 00:04:59,615 INFO L226 Difference]: Without dead ends: 96 [2024-11-24 00:04:59,616 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:04:59,616 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 10 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:04:59,616 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 137 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:04:59,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-24 00:04:59,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2024-11-24 00:04:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 70 states have (on average 1.4) internal successors, (98), 84 states have internal predecessors, (98), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-24 00:04:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2024-11-24 00:04:59,629 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 23 [2024-11-24 00:04:59,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:04:59,629 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2024-11-24 00:04:59,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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) [2024-11-24 00:04:59,630 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2024-11-24 00:04:59,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-24 00:04:59,630 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:04:59,630 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] [2024-11-24 00:04:59,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-24 00:04:59,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:59,831 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:04:59,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:04:59,832 INFO L85 PathProgramCache]: Analyzing trace with hash -466769673, now seen corresponding path program 1 times [2024-11-24 00:04:59,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:04:59,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144342357] [2024-11-24 00:04:59,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:04:59,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:04:59,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:04:59,834 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:04:59,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-24 00:04:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:04:59,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-24 00:04:59,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:04:59,969 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 [2024-11-24 00:04:59,990 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 [2024-11-24 00:05:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:05:00,001 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:05:00,001 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:05:00,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144342357] [2024-11-24 00:05:00,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144342357] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:05:00,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:05:00,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:05:00,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190368487] [2024-11-24 00:05:00,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:05:00,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:05:00,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:05:00,003 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:05:00,003 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:05:00,003 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:05:00,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:05:00,067 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2024-11-24 00:05:00,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:05:00,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2024-11-24 00:05:00,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:05:00,069 INFO L225 Difference]: With dead ends: 92 [2024-11-24 00:05:00,069 INFO L226 Difference]: Without dead ends: 92 [2024-11-24 00:05:00,070 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:05:00,070 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 0 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:05:00,070 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 300 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:05:00,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-24 00:05:00,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-24 00:05:00,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 67 states have (on average 1.373134328358209) internal successors, (92), 81 states have internal predecessors, (92), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-24 00:05:00,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2024-11-24 00:05:00,082 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 23 [2024-11-24 00:05:00,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:05:00,083 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2024-11-24 00:05:00,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:05:00,084 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2024-11-24 00:05:00,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-24 00:05:00,085 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:05:00,085 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] [2024-11-24 00:05:00,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-24 00:05:00,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:00,290 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:05:00,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:05:00,290 INFO L85 PathProgramCache]: Analyzing trace with hash 913057966, now seen corresponding path program 1 times [2024-11-24 00:05:00,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:05:00,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733134624] [2024-11-24 00:05:00,291 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:05:00,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:00,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:05:00,292 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:05:00,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-24 00:05:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:05:00,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-24 00:05:00,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:05:00,405 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 [2024-11-24 00:05:00,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-24 00:05:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:05:00,587 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:05:00,680 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:05:00,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733134624] [2024-11-24 00:05:00,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733134624] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:05:00,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1575091414] [2024-11-24 00:05:00,681 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:05:00,681 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-24 00:05:00,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-24 00:05:00,691 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-24 00:05:00,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2024-11-24 00:05:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:05:00,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-24 00:05:00,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:05:00,954 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 [2024-11-24 00:05:01,143 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 [2024-11-24 00:05:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:05:01,188 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:05:01,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1575091414] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:05:01,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:05:01,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2024-11-24 00:05:01,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946897486] [2024-11-24 00:05:01,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 00:05:01,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-24 00:05:01,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:05:01,238 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-24 00:05:01,238 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-24 00:05:01,238 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-24 00:05:01,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:05:01,455 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2024-11-24 00:05:01,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-24 00:05:01,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2024-11-24 00:05:01,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:05:01,456 INFO L225 Difference]: With dead ends: 98 [2024-11-24 00:05:01,456 INFO L226 Difference]: Without dead ends: 98 [2024-11-24 00:05:01,457 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-11-24 00:05:01,457 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 59 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:05:01,458 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 370 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 00:05:01,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-24 00:05:01,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2024-11-24 00:05:01,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.352112676056338) internal successors, (96), 85 states have internal predecessors, (96), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-11-24 00:05:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 111 transitions. [2024-11-24 00:05:01,467 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 111 transitions. Word has length 24 [2024-11-24 00:05:01,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:05:01,468 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 111 transitions. [2024-11-24 00:05:01,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-24 00:05:01,468 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 111 transitions. [2024-11-24 00:05:01,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-24 00:05:01,469 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:05:01,469 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] [2024-11-24 00:05:01,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2024-11-24 00:05:01,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-24 00:05:01,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:01,874 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:05:01,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:05:01,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1759974027, now seen corresponding path program 1 times [2024-11-24 00:05:01,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:05:01,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059090566] [2024-11-24 00:05:01,874 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:05:01,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:01,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:05:01,876 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:05:01,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-24 00:05:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:05:01,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-24 00:05:01,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:05:02,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-24 00:05:02,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-24 00:05:02,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-24 00:05:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:05:02,259 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:05:02,372 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:05:02,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059090566] [2024-11-24 00:05:02,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059090566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:05:02,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [648662909] [2024-11-24 00:05:02,373 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:05:02,373 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-24 00:05:02,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-24 00:05:02,375 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-24 00:05:02,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2024-11-24 00:05:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:05:02,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-24 00:05:02,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:05:02,663 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 [2024-11-24 00:05:02,938 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 [2024-11-24 00:05:02,997 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 [2024-11-24 00:05:03,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:05:03,004 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:05:03,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [648662909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:05:03,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:05:03,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2024-11-24 00:05:03,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818080763] [2024-11-24 00:05:03,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 00:05:03,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-24 00:05:03,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:05:03,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-24 00:05:03,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-24 00:05:03,125 INFO L87 Difference]: Start difference. First operand 97 states and 111 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-24 00:05:07,151 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] [2024-11-24 00:05:11,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:05:15,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:05:17,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:05:21,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:05:25,860 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] [2024-11-24 00:05:26,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:05:26,310 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2024-11-24 00:05:26,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-24 00:05:26,312 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2024-11-24 00:05:26,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:05:26,313 INFO L225 Difference]: With dead ends: 154 [2024-11-24 00:05:26,313 INFO L226 Difference]: Without dead ends: 154 [2024-11-24 00:05:26,313 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-11-24 00:05:26,314 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 110 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 9 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:05:26,315 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 309 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 190 Invalid, 5 Unknown, 0 Unchecked, 23.0s Time] [2024-11-24 00:05:26,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-24 00:05:26,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 134. [2024-11-24 00:05:26,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 102 states have (on average 1.411764705882353) internal successors, (144), 117 states have internal predecessors, (144), 9 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-24 00:05:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 165 transitions. [2024-11-24 00:05:26,329 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 165 transitions. Word has length 25 [2024-11-24 00:05:26,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:05:26,330 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 165 transitions. [2024-11-24 00:05:26,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-24 00:05:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 165 transitions. [2024-11-24 00:05:26,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-24 00:05:26,331 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:05:26,331 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] [2024-11-24 00:05:26,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2024-11-24 00:05:26,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-24 00:05:26,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:26,739 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:05:26,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:05:26,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1548623114, now seen corresponding path program 1 times [2024-11-24 00:05:26,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:05:26,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1984701776] [2024-11-24 00:05:26,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:05:26,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:26,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:05:26,741 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:05:26,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-24 00:05:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:05:26,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-24 00:05:26,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:05:26,987 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 [2024-11-24 00:05:27,009 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 [2024-11-24 00:05:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:05:27,153 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:05:27,153 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:05:27,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984701776] [2024-11-24 00:05:27,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984701776] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:05:27,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:05:27,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:05:27,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904854692] [2024-11-24 00:05:27,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:05:27,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:05:27,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:05:27,155 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:05:27,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:05:27,155 INFO L87 Difference]: Start difference. First operand 134 states and 165 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:05:27,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:05:27,421 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2024-11-24 00:05:27,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:05:27,422 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2024-11-24 00:05:27,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:05:27,423 INFO L225 Difference]: With dead ends: 83 [2024-11-24 00:05:27,423 INFO L226 Difference]: Without dead ends: 77 [2024-11-24 00:05:27,424 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-24 00:05:27,424 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 1 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:05:27,425 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 314 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 00:05:27,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-24 00:05:27,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-11-24 00:05:27,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 67 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-24 00:05:27,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2024-11-24 00:05:27,429 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 25 [2024-11-24 00:05:27,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:05:27,429 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2024-11-24 00:05:27,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:05:27,430 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2024-11-24 00:05:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-24 00:05:27,431 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:05:27,431 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:05:27,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-24 00:05:27,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:27,631 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:05:27,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:05:27,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2049303106, now seen corresponding path program 1 times [2024-11-24 00:05:27,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:05:27,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22562026] [2024-11-24 00:05:27,633 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:05:27,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:27,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:05:27,635 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:05:27,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-24 00:05:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:05:27,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 00:05:27,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:05:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:05:27,947 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:05:27,948 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:05:27,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22562026] [2024-11-24 00:05:27,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22562026] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:05:27,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:05:27,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 00:05:27,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578597549] [2024-11-24 00:05:27,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:05:27,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:05:27,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:05:27,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:05:27,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:05:27,949 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:05:28,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:05:28,499 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2024-11-24 00:05:28,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 00:05:28,500 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2024-11-24 00:05:28,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:05:28,501 INFO L225 Difference]: With dead ends: 87 [2024-11-24 00:05:28,501 INFO L226 Difference]: Without dead ends: 87 [2024-11-24 00:05:28,501 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-24 00:05:28,502 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 16 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-24 00:05:28,502 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 194 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-24 00:05:28,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-24 00:05:28,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2024-11-24 00:05:28,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 56 states have (on average 1.375) internal successors, (77), 68 states have internal predecessors, (77), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-24 00:05:28,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2024-11-24 00:05:28,508 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 27 [2024-11-24 00:05:28,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:05:28,508 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2024-11-24 00:05:28,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:05:28,508 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2024-11-24 00:05:28,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-24 00:05:28,509 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:05:28,509 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] [2024-11-24 00:05:28,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-24 00:05:28,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:28,710 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:05:28,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:05:28,710 INFO L85 PathProgramCache]: Analyzing trace with hash -2049303105, now seen corresponding path program 1 times [2024-11-24 00:05:28,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:05:28,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [424412176] [2024-11-24 00:05:28,711 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:05:28,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:28,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:05:28,713 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:05:28,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-24 00:05:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:05:28,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-24 00:05:28,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:05:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:05:29,377 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:05:29,377 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:05:29,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424412176] [2024-11-24 00:05:29,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424412176] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:05:29,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:05:29,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:05:29,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552476347] [2024-11-24 00:05:29,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:05:29,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 00:05:29,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:05:29,380 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 00:05:29,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-24 00:05:29,380 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:05:29,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:05:29,838 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2024-11-24 00:05:29,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:05:29,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2024-11-24 00:05:29,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:05:29,840 INFO L225 Difference]: With dead ends: 88 [2024-11-24 00:05:29,840 INFO L226 Difference]: Without dead ends: 88 [2024-11-24 00:05:29,840 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-24 00:05:29,840 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 21 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-24 00:05:29,841 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 186 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-24 00:05:29,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-24 00:05:29,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2024-11-24 00:05:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 60 states have (on average 1.3833333333333333) internal successors, (83), 73 states have internal predecessors, (83), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-24 00:05:29,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2024-11-24 00:05:29,845 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 27 [2024-11-24 00:05:29,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:05:29,845 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2024-11-24 00:05:29,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:05:29,846 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2024-11-24 00:05:29,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-24 00:05:29,847 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:05:29,847 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] [2024-11-24 00:05:29,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-24 00:05:30,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:30,051 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:05:30,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:05:30,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1275380112, now seen corresponding path program 1 times [2024-11-24 00:05:30,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:05:30,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732421840] [2024-11-24 00:05:30,052 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:05:30,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:30,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:05:30,056 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:05:30,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-24 00:05:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:05:30,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-24 00:05:30,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:05:30,159 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 [2024-11-24 00:05:30,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-24 00:05:30,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 5 [2024-11-24 00:05:30,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-11-24 00:05:30,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-24 00:05:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:05:30,648 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:05:34,961 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:05:34,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732421840] [2024-11-24 00:05:34,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732421840] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:05:34,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [149817006] [2024-11-24 00:05:34,962 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:05:34,962 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-24 00:05:34,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-24 00:05:34,965 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-24 00:05:34,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2024-11-24 00:05:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:05:35,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-24 00:05:35,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:05:35,267 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 [2024-11-24 00:05:35,392 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 [2024-11-24 00:05:35,697 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 [2024-11-24 00:05:35,795 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 [2024-11-24 00:05:35,915 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 [2024-11-24 00:05:35,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:05:35,945 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:05:44,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [149817006] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:05:44,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:05:44,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2024-11-24 00:05:44,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976570753] [2024-11-24 00:05:44,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 00:05:44,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 00:05:44,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:05:44,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 00:05:44,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=121, Unknown=1, NotChecked=0, Total=156 [2024-11-24 00:05:44,251 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 12 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-24 00:05:45,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:05:45,311 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2024-11-24 00:05:45,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 00:05:45,311 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2024-11-24 00:05:45,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:05:45,312 INFO L225 Difference]: With dead ends: 89 [2024-11-24 00:05:45,312 INFO L226 Difference]: Without dead ends: 89 [2024-11-24 00:05:45,312 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=34, Invalid=121, Unknown=1, NotChecked=0, Total=156 [2024-11-24 00:05:45,313 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 26 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:05:45,313 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 374 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-24 00:05:45,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-24 00:05:45,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2024-11-24 00:05:45,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 76 states have internal predecessors, (86), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-24 00:05:45,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2024-11-24 00:05:45,317 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 26 [2024-11-24 00:05:45,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:05:45,317 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2024-11-24 00:05:45,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-24 00:05:45,317 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2024-11-24 00:05:45,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-24 00:05:45,318 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:05:45,318 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] [2024-11-24 00:05:45,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-24 00:05:45,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2024-11-24 00:05:45,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt [2024-11-24 00:05:45,719 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:05:45,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:05:45,719 INFO L85 PathProgramCache]: Analyzing trace with hash 896113127, now seen corresponding path program 1 times [2024-11-24 00:05:45,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:05:45,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164244226] [2024-11-24 00:05:45,720 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:05:45,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:45,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:05:45,722 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:05:45,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-24 00:05:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:05:45,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-24 00:05:45,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:05:46,029 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 [2024-11-24 00:05:46,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:05:46,302 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:05:46,302 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:05:46,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164244226] [2024-11-24 00:05:46,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164244226] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:05:46,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:05:46,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-24 00:05:46,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268462721] [2024-11-24 00:05:46,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:05:46,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-24 00:05:46,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:05:46,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-24 00:05:46,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-24 00:05:46,303 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:05:46,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:05:46,802 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2024-11-24 00:05:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 00:05:46,803 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-24 00:05:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:05:46,804 INFO L225 Difference]: With dead ends: 90 [2024-11-24 00:05:46,804 INFO L226 Difference]: Without dead ends: 90 [2024-11-24 00:05:46,804 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-24 00:05:46,805 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 13 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-24 00:05:46,805 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 345 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-24 00:05:46,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-24 00:05:46,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2024-11-24 00:05:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 76 states have internal predecessors, (85), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-24 00:05:46,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2024-11-24 00:05:46,810 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 28 [2024-11-24 00:05:46,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:05:46,810 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2024-11-24 00:05:46,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:05:46,810 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2024-11-24 00:05:46,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-24 00:05:46,811 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:05:46,811 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] [2024-11-24 00:05:46,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-24 00:05:47,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:47,016 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:05:47,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:05:47,016 INFO L85 PathProgramCache]: Analyzing trace with hash -2049269858, now seen corresponding path program 1 times [2024-11-24 00:05:47,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:05:47,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847309986] [2024-11-24 00:05:47,017 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:05:47,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:47,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:05:47,018 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:05:47,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-24 00:05:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:05:47,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 00:05:47,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:05:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:05:47,323 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:05:47,323 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:05:47,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847309986] [2024-11-24 00:05:47,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847309986] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:05:47,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:05:47,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 00:05:47,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813467097] [2024-11-24 00:05:47,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:05:47,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:05:47,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:05:47,324 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:05:47,325 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:05:47,325 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:05:47,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:05:47,927 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2024-11-24 00:05:47,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 00:05:47,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2024-11-24 00:05:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:05:47,928 INFO L225 Difference]: With dead ends: 98 [2024-11-24 00:05:47,928 INFO L226 Difference]: Without dead ends: 98 [2024-11-24 00:05:47,929 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-24 00:05:47,929 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 44 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-24 00:05:47,929 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 173 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-24 00:05:47,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-24 00:05:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 90. [2024-11-24 00:05:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 79 states have internal predecessors, (90), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-24 00:05:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2024-11-24 00:05:47,934 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 27 [2024-11-24 00:05:47,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:05:47,934 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2024-11-24 00:05:47,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:05:47,935 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2024-11-24 00:05:47,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-24 00:05:47,935 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:05:47,935 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] [2024-11-24 00:05:47,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-24 00:05:48,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:48,136 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:05:48,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:05:48,137 INFO L85 PathProgramCache]: Analyzing trace with hash -2049269857, now seen corresponding path program 1 times [2024-11-24 00:05:48,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:05:48,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925636933] [2024-11-24 00:05:48,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:05:48,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:48,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:05:48,139 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:05:48,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-24 00:05:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:05:48,238 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-24 00:05:48,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:05:48,276 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 [2024-11-24 00:05:48,292 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 [2024-11-24 00:05:48,434 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 [2024-11-24 00:05:48,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:05:48,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-24 00:05:48,551 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-24 00:05:48,551 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 [2024-11-24 00:05:49,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:05:49,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-24 00:05:49,068 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-24 00:05:49,068 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 [2024-11-24 00:05:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:05:49,406 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:05:49,406 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:05:49,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925636933] [2024-11-24 00:05:49,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925636933] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:05:49,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:05:49,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-24 00:05:49,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785591795] [2024-11-24 00:05:49,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:05:49,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-24 00:05:49,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:05:49,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-24 00:05:49,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=52, Unknown=1, NotChecked=14, Total=90 [2024-11-24 00:05:49,407 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:05:50,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:05:50,393 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2024-11-24 00:05:50,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-24 00:05:50,394 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2024-11-24 00:05:50,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:05:50,395 INFO L225 Difference]: With dead ends: 91 [2024-11-24 00:05:50,395 INFO L226 Difference]: Without dead ends: 91 [2024-11-24 00:05:50,395 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=63, Unknown=1, NotChecked=16, Total=110 [2024-11-24 00:05:50,396 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 46 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-24 00:05:50,396 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 198 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 210 Invalid, 0 Unknown, 98 Unchecked, 0.9s Time] [2024-11-24 00:05:50,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-24 00:05:50,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2024-11-24 00:05:50,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 78 states have internal predecessors, (88), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-24 00:05:50,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2024-11-24 00:05:50,401 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 27 [2024-11-24 00:05:50,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:05:50,401 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2024-11-24 00:05:50,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:05:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2024-11-24 00:05:50,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-24 00:05:50,402 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:05:50,402 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] [2024-11-24 00:05:50,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-24 00:05:50,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:50,603 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting f19_undoErr3ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:05:50,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:05:50,603 INFO L85 PathProgramCache]: Analyzing trace with hash 2009703198, now seen corresponding path program 1 times [2024-11-24 00:05:50,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:05:50,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418335644] [2024-11-24 00:05:50,603 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:05:50,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:50,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:05:50,605 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:05:50,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-24 00:05:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:05:50,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-24 00:05:50,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:05:50,926 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 [2024-11-24 00:05:51,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-24 00:05:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:05:51,358 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:05:51,358 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:05:51,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418335644] [2024-11-24 00:05:51,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418335644] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:05:51,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:05:51,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-24 00:05:51,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347600088] [2024-11-24 00:05:51,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:05:51,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-24 00:05:51,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:05:51,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-24 00:05:51,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-24 00:05:51,359 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:05:52,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:05:52,375 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2024-11-24 00:05:52,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 00:05:52,376 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2024-11-24 00:05:52,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:05:52,377 INFO L225 Difference]: With dead ends: 98 [2024-11-24 00:05:52,377 INFO L226 Difference]: Without dead ends: 98 [2024-11-24 00:05:52,377 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-24 00:05:52,377 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-24 00:05:52,378 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 297 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-24 00:05:52,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-24 00:05:52,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2024-11-24 00:05:52,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 84 states have internal predecessors, (95), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-24 00:05:52,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2024-11-24 00:05:52,386 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 29 [2024-11-24 00:05:52,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:05:52,386 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2024-11-24 00:05:52,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:05:52,386 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2024-11-24 00:05:52,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-24 00:05:52,387 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:05:52,388 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] [2024-11-24 00:05:52,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-24 00:05:52,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:52,589 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:05:52,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:05:52,589 INFO L85 PathProgramCache]: Analyzing trace with hash 897143893, now seen corresponding path program 1 times [2024-11-24 00:05:52,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:05:52,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256260429] [2024-11-24 00:05:52,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:05:52,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:05:52,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:05:52,592 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:05:52,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-24 00:05:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:05:52,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-24 00:05:52,715 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:05:52,958 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 [2024-11-24 00:05:53,392 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 [2024-11-24 00:05:53,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:05:53,722 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:05:58,110 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:05:58,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256260429] [2024-11-24 00:05:58,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256260429] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:05:58,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2119876867] [2024-11-24 00:05:58,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:05:58,110 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-24 00:05:58,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-24 00:05:58,113 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-24 00:05:58,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2024-11-24 00:05:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:05:58,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-24 00:05:58,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:05:58,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-24 00:05:58,716 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 [2024-11-24 00:05:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:05:58,872 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:05:59,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2119876867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:05:59,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:05:59,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-11-24 00:05:59,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17482944] [2024-11-24 00:05:59,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 00:05:59,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 00:05:59,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:05:59,011 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 00:05:59,012 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=142, Unknown=1, NotChecked=0, Total=182 [2024-11-24 00:05:59,012 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:05:59,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:05:59,687 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2024-11-24 00:05:59,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-24 00:05:59,687 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-24 00:05:59,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:05:59,688 INFO L225 Difference]: With dead ends: 96 [2024-11-24 00:05:59,688 INFO L226 Difference]: Without dead ends: 96 [2024-11-24 00:05:59,688 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=58, Invalid=213, Unknown=1, NotChecked=0, Total=272 [2024-11-24 00:05:59,689 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 66 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-24 00:05:59,689 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 287 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-24 00:05:59,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-24 00:05:59,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2024-11-24 00:05:59,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 72 states have (on average 1.3055555555555556) internal successors, (94), 83 states have internal predecessors, (94), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-24 00:05:59,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2024-11-24 00:05:59,694 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 28 [2024-11-24 00:05:59,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:05:59,694 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2024-11-24 00:05:59,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:05:59,695 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2024-11-24 00:05:59,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-24 00:05:59,695 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:05:59,695 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] [2024-11-24 00:05:59,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2024-11-24 00:05:59,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-24 00:06:00,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:06:00,096 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting f19_undoErr3ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:06:00,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:06:00,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1499169021, now seen corresponding path program 1 times [2024-11-24 00:06:00,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:06:00,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949820306] [2024-11-24 00:06:00,097 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:06:00,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:06:00,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:06:00,098 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:06:00,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-24 00:06:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:06:00,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-24 00:06:00,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:06:00,337 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 [2024-11-24 00:06:00,352 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 [2024-11-24 00:06:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:06:00,471 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:06:00,471 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:06:00,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949820306] [2024-11-24 00:06:00,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949820306] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:06:00,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:06:00,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:06:00,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141633828] [2024-11-24 00:06:00,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:06:00,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:06:00,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:06:00,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:06:00,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:06:00,472 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:06:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:06:00,630 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2024-11-24 00:06:00,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:06:00,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2024-11-24 00:06:00,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:06:00,641 INFO L225 Difference]: With dead ends: 93 [2024-11-24 00:06:00,641 INFO L226 Difference]: Without dead ends: 93 [2024-11-24 00:06:00,641 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:06:00,643 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 0 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-24 00:06:00,643 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 297 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-24 00:06:00,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-24 00:06:00,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-11-24 00:06:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 70 states have (on average 1.3) internal successors, (91), 81 states have internal predecessors, (91), 5 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-24 00:06:00,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2024-11-24 00:06:00,650 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 29 [2024-11-24 00:06:00,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:06:00,650 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2024-11-24 00:06:00,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:06:00,651 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2024-11-24 00:06:00,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-24 00:06:00,651 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:06:00,651 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] [2024-11-24 00:06:00,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-24 00:06:00,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:06:00,852 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting f19_undoErr3ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:06:00,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:06:00,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1106142011, now seen corresponding path program 1 times [2024-11-24 00:06:00,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:06:00,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [266512957] [2024-11-24 00:06:00,853 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:06:00,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:06:00,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:06:00,855 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:06:00,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-24 00:06:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:06:00,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-24 00:06:00,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:06:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:06:01,001 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:06:01,001 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:06:01,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266512957] [2024-11-24 00:06:01,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266512957] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:06:01,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:06:01,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:06:01,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560773540] [2024-11-24 00:06:01,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:06:01,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:06:01,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:06:01,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:06:01,003 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:06:01,003 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:06:01,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:06:01,071 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2024-11-24 00:06:01,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:06:01,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2024-11-24 00:06:01,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:06:01,073 INFO L225 Difference]: With dead ends: 83 [2024-11-24 00:06:01,073 INFO L226 Difference]: Without dead ends: 83 [2024-11-24 00:06:01,073 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:06:01,074 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 14 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:06:01,074 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 161 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:06:01,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-24 00:06:01,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2024-11-24 00:06:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 72 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-24 00:06:01,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2024-11-24 00:06:01,078 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 29 [2024-11-24 00:06:01,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:06:01,078 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2024-11-24 00:06:01,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:06:01,078 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2024-11-24 00:06:01,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-24 00:06:01,079 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:06:01,079 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] [2024-11-24 00:06:01,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-24 00:06:01,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:06:01,280 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting f19_undoErr4ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:06:01,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:06:01,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2123710263, now seen corresponding path program 1 times [2024-11-24 00:06:01,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:06:01,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934705086] [2024-11-24 00:06:01,280 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:06:01,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:06:01,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:06:01,282 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:06:01,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-24 00:06:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:06:01,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-24 00:06:01,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:06:01,462 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 [2024-11-24 00:06:01,619 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 [2024-11-24 00:06:01,820 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 [2024-11-24 00:06:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:06:01,892 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:06:01,892 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:06:01,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934705086] [2024-11-24 00:06:01,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934705086] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:06:01,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:06:01,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-24 00:06:01,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852037694] [2024-11-24 00:06:01,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:06:01,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-24 00:06:01,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:06:01,893 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-24 00:06:01,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-24 00:06:01,893 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:06:02,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:06:02,784 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2024-11-24 00:06:02,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 00:06:02,785 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2024-11-24 00:06:02,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:06:02,785 INFO L225 Difference]: With dead ends: 82 [2024-11-24 00:06:02,786 INFO L226 Difference]: Without dead ends: 82 [2024-11-24 00:06:02,786 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-24 00:06:02,786 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 9 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-24 00:06:02,787 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 296 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-24 00:06:02,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-24 00:06:02,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-11-24 00:06:02,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 72 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-24 00:06:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2024-11-24 00:06:02,790 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 30 [2024-11-24 00:06:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:06:02,791 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2024-11-24 00:06:02,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:06:02,791 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2024-11-24 00:06:02,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-24 00:06:02,792 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:06:02,792 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] [2024-11-24 00:06:02,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-24 00:06:02,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:06:02,992 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:06:02,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:06:02,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2042088928, now seen corresponding path program 1 times [2024-11-24 00:06:02,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:06:02,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947644818] [2024-11-24 00:06:02,993 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:06:02,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:06:02,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:06:02,995 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:06:02,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-24 00:06:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:06:03,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-24 00:06:03,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:06:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:06:03,141 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:06:03,141 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:06:03,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947644818] [2024-11-24 00:06:03,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947644818] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:06:03,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:06:03,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:06:03,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808130429] [2024-11-24 00:06:03,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:06:03,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:06:03,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:06:03,142 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:06:03,142 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:06:03,142 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:06:03,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:06:03,194 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2024-11-24 00:06:03,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:06:03,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2024-11-24 00:06:03,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:06:03,196 INFO L225 Difference]: With dead ends: 82 [2024-11-24 00:06:03,196 INFO L226 Difference]: Without dead ends: 82 [2024-11-24 00:06:03,196 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:06:03,197 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 0 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:06:03,197 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 174 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-24 00:06:03,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-24 00:06:03,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2024-11-24 00:06:03,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 72 states have internal predecessors, (75), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-24 00:06:03,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2024-11-24 00:06:03,201 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 29 [2024-11-24 00:06:03,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:06:03,201 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2024-11-24 00:06:03,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:06:03,201 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2024-11-24 00:06:03,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-24 00:06:03,202 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:06:03,202 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] [2024-11-24 00:06:03,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-24 00:06:03,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:06:03,403 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:06:03,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:06:03,403 INFO L85 PathProgramCache]: Analyzing trace with hash 2041657022, now seen corresponding path program 1 times [2024-11-24 00:06:03,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:06:03,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577150457] [2024-11-24 00:06:03,403 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:06:03,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:06:03,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:06:03,405 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:06:03,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-24 00:06:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:06:03,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-24 00:06:03,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:06:03,734 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 [2024-11-24 00:06:04,234 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 [2024-11-24 00:06:04,533 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 [2024-11-24 00:06:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:06:04,621 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:06:09,165 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:06:09,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577150457] [2024-11-24 00:06:09,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577150457] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:06:09,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [635497946] [2024-11-24 00:06:09,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:06:09,165 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-24 00:06:09,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-24 00:06:09,168 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-24 00:06:09,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2024-11-24 00:06:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:06:09,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-24 00:06:09,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:06:09,583 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 [2024-11-24 00:06:09,933 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 [2024-11-24 00:06:10,117 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 15 treesize of output 7 [2024-11-24 00:06:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:06:10,134 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:06:14,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [635497946] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:06:14,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:06:14,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2024-11-24 00:06:14,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916833208] [2024-11-24 00:06:14,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 00:06:14,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 00:06:14,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:06:14,462 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 00:06:14,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=142, Unknown=1, NotChecked=0, Total=182 [2024-11-24 00:06:14,463 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:06:18,539 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] [2024-11-24 00:06:19,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:06:19,677 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2024-11-24 00:06:19,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-24 00:06:19,678 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2024-11-24 00:06:19,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:06:19,678 INFO L225 Difference]: With dead ends: 82 [2024-11-24 00:06:19,678 INFO L226 Difference]: Without dead ends: 82 [2024-11-24 00:06:19,678 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=58, Invalid=213, Unknown=1, NotChecked=0, Total=272 [2024-11-24 00:06:19,679 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 48 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:06:19,679 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 228 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 189 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2024-11-24 00:06:19,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-24 00:06:19,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2024-11-24 00:06:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 71 states have internal predecessors, (74), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-24 00:06:19,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2024-11-24 00:06:19,683 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 29 [2024-11-24 00:06:19,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:06:19,683 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2024-11-24 00:06:19,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:06:19,684 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2024-11-24 00:06:19,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-24 00:06:19,684 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:06:19,685 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] [2024-11-24 00:06:19,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2024-11-24 00:06:19,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-24 00:06:20,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:06:20,085 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:06:20,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:06:20,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1133141641, now seen corresponding path program 1 times [2024-11-24 00:06:20,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:06:20,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038812216] [2024-11-24 00:06:20,086 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:06:20,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:06:20,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:06:20,088 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:06:20,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-24 00:06:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:06:20,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-24 00:06:20,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:06:20,269 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 [2024-11-24 00:06:20,432 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 [2024-11-24 00:06:20,694 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 [2024-11-24 00:06:20,974 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2024-11-24 00:06:20,974 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 [2024-11-24 00:06:21,003 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 [2024-11-24 00:06:21,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-11-24 00:06:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:06:21,496 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:06:34,304 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:06:34,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038812216] [2024-11-24 00:06:34,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038812216] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:06:34,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1244211313] [2024-11-24 00:06:34,305 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:06:34,305 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-24 00:06:34,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-24 00:06:34,307 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-24 00:06:34,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2024-11-24 00:06:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:06:34,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-24 00:06:34,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:06:34,579 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 [2024-11-24 00:06:34,672 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 [2024-11-24 00:06:34,823 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 11 treesize of output 5 [2024-11-24 00:06:34,853 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 [2024-11-24 00:06:34,941 INFO L349 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2024-11-24 00:06:34,941 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 [2024-11-24 00:06:35,025 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 [2024-11-24 00:06:35,199 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 [2024-11-24 00:06:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-24 00:06:35,220 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:06:35,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1244211313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:06:35,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:06:35,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2024-11-24 00:06:35,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793829280] [2024-11-24 00:06:35,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 00:06:35,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-24 00:06:35,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:06:35,858 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-24 00:06:35,859 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=4, NotChecked=28, Total=272 [2024-11-24 00:06:35,859 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-24 00:06:37,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:06:37,271 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2024-11-24 00:06:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-24 00:06:37,272 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-11-24 00:06:37,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:06:37,273 INFO L225 Difference]: With dead ends: 84 [2024-11-24 00:06:37,273 INFO L226 Difference]: Without dead ends: 84 [2024-11-24 00:06:37,273 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=4, NotChecked=36, Total=420 [2024-11-24 00:06:37,274 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 29 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:06:37,274 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 278 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 248 Invalid, 0 Unknown, 71 Unchecked, 1.1s Time] [2024-11-24 00:06:37,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-24 00:06:37,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-24 00:06:37,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 64 states have (on average 1.203125) internal successors, (77), 74 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-24 00:06:37,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2024-11-24 00:06:37,278 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 30 [2024-11-24 00:06:37,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:06:37,278 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2024-11-24 00:06:37,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-24 00:06:37,278 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2024-11-24 00:06:37,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-24 00:06:37,279 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:06:37,279 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] [2024-11-24 00:06:37,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2024-11-24 00:06:37,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-24 00:06:37,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:06:37,680 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:06:37,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:06:37,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1373234037, now seen corresponding path program 1 times [2024-11-24 00:06:37,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:06:37,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967495064] [2024-11-24 00:06:37,680 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:06:37,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:06:37,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:06:37,682 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:06:37,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-24 00:06:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:06:37,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-24 00:06:37,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:06:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:06:37,955 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:06:37,955 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:06:37,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967495064] [2024-11-24 00:06:37,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967495064] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:06:37,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:06:37,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:06:37,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74121393] [2024-11-24 00:06:37,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:06:37,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:06:37,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:06:37,956 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:06:37,956 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:06:37,956 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:06:38,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:06:38,112 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2024-11-24 00:06:38,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:06:38,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-11-24 00:06:38,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:06:38,113 INFO L225 Difference]: With dead ends: 87 [2024-11-24 00:06:38,113 INFO L226 Difference]: Without dead ends: 87 [2024-11-24 00:06:38,113 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-24 00:06:38,114 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 9 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:06:38,114 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 264 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:06:38,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-24 00:06:38,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-24 00:06:38,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 77 states have internal predecessors, (80), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-24 00:06:38,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2024-11-24 00:06:38,118 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 30 [2024-11-24 00:06:38,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:06:38,118 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2024-11-24 00:06:38,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-24 00:06:38,118 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2024-11-24 00:06:38,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-24 00:06:38,119 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:06:38,119 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] [2024-11-24 00:06:38,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-24 00:06:38,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:06:38,320 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:06:38,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:06:38,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1710835094, now seen corresponding path program 1 times [2024-11-24 00:06:38,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:06:38,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260663926] [2024-11-24 00:06:38,320 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:06:38,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:06:38,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:06:38,323 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:06:38,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-24 00:06:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:06:38,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-24 00:06:38,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:06:38,654 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-24 00:06:38,655 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 [2024-11-24 00:06:38,753 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 [2024-11-24 00:06:38,942 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 [2024-11-24 00:06:47,508 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:06:47,508 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 33 treesize of output 29 [2024-11-24 00:06:47,521 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 [2024-11-24 00:06:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:06:47,538 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:06:47,538 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:06:47,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260663926] [2024-11-24 00:06:47,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260663926] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:06:47,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:06:47,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-24 00:06:47,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335214675] [2024-11-24 00:06:47,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:06:47,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 00:06:47,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:06:47,539 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 00:06:47,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=99, Unknown=2, NotChecked=0, Total=132 [2024-11-24 00:06:47,541 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-24 00:06:51,592 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] [2024-11-24 00:06:55,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:06:59,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:07:03,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:07:07,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:07:11,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:07:15,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:07:19,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:07:23,840 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:07:27,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:07:32,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:07:36,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:07:40,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:07:44,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:07:48,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:07:52,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:07:56,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:08:00,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:08:04,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:08:08,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:08:12,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:08:16,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:08:20,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:08:24,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:08:28,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:08:32,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:08:36,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:08:40,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:08:44,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:08:48,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:08:52,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:08:52,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:08:52,743 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2024-11-24 00:08:52,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 00:08:52,744 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (3), 3 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 33 [2024-11-24 00:08:52,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:08:52,745 INFO L225 Difference]: With dead ends: 86 [2024-11-24 00:08:52,745 INFO L226 Difference]: Without dead ends: 86 [2024-11-24 00:08:52,745 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=36, Invalid=118, Unknown=2, NotChecked=0, Total=156 [2024-11-24 00:08:52,746 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 22 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 7 mSolverCounterUnsat, 31 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 125.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 31 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:08:52,746 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 242 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 193 Invalid, 31 Unknown, 0 Unchecked, 125.1s Time] [2024-11-24 00:08:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-24 00:08:52,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-11-24 00:08:52,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 76 states have internal predecessors, (79), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-24 00:08:52,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2024-11-24 00:08:52,750 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 33 [2024-11-24 00:08:52,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:08:52,750 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2024-11-24 00:08:52,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-24 00:08:52,750 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2024-11-24 00:08:52,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-24 00:08:52,751 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:08:52,751 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] [2024-11-24 00:08:52,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-24 00:08:52,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:52,951 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:08:52,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:08:52,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1710835095, now seen corresponding path program 1 times [2024-11-24 00:08:52,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:08:52,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817484446] [2024-11-24 00:08:52,952 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:08:52,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:08:52,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:08:52,955 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:08:52,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-24 00:08:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:08:53,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-24 00:08:53,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:53,151 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 [2024-11-24 00:08:53,440 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-24 00:08:53,440 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 [2024-11-24 00:08:53,764 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 [2024-11-24 00:08:53,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:08:53,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-24 00:08:53,869 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-24 00:08:53,869 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 [2024-11-24 00:08:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2024-11-24 00:08:54,302 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:08:55,143 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:08:55,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817484446] [2024-11-24 00:08:55,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817484446] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:08:55,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [37055662] [2024-11-24 00:08:55,144 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:08:55,144 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-24 00:08:55,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-24 00:08:55,146 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-24 00:08:55,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2024-11-24 00:08:55,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:08:55,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-24 00:08:55,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:08:55,544 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 [2024-11-24 00:08:55,656 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 5 treesize of output 3 [2024-11-24 00:08:56,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:08:56,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-24 00:08:56,621 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 5 treesize of output 3 [2024-11-24 00:08:57,219 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-24 00:08:57,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-24 00:08:57,500 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 [2024-11-24 00:08:59,696 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:08:59,696 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 42 treesize of output 38 [2024-11-24 00:09:00,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:09:00,478 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:09:02,705 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 30 treesize of output 26 [2024-11-24 00:09:12,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [37055662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:09:12,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:09:12,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 23 [2024-11-24 00:09:12,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791535131] [2024-11-24 00:09:12,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 00:09:12,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-24 00:09:12,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:09:12,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-24 00:09:12,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=788, Unknown=22, NotChecked=58, Total=992 [2024-11-24 00:09:12,368 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 24 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-24 00:09:16,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:09:27,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:09:27,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:09:27,448 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2024-11-24 00:09:27,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-24 00:09:27,450 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 33 [2024-11-24 00:09:27,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:09:27,451 INFO L225 Difference]: With dead ends: 85 [2024-11-24 00:09:27,451 INFO L226 Difference]: Without dead ends: 85 [2024-11-24 00:09:27,452 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=310, Invalid=1648, Unknown=26, NotChecked=86, Total=2070 [2024-11-24 00:09:27,453 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 171 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 34 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2024-11-24 00:09:27,453 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 351 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 379 Invalid, 1 Unknown, 62 Unchecked, 10.9s Time] [2024-11-24 00:09:27,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-24 00:09:27,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-11-24 00:09:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 67 states have (on average 1.164179104477612) internal successors, (78), 75 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-24 00:09:27,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2024-11-24 00:09:27,459 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 33 [2024-11-24 00:09:27,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:09:27,460 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2024-11-24 00:09:27,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-24 00:09:27,460 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2024-11-24 00:09:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-24 00:09:27,461 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:09:27,461 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] [2024-11-24 00:09:27,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-24 00:09:27,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2024-11-24 00:09:27,862 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt [2024-11-24 00:09:27,862 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:09:27,862 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:09:27,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1020452149, now seen corresponding path program 1 times [2024-11-24 00:09:27,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:09:27,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292028731] [2024-11-24 00:09:27,863 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:09:27,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:09:27,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:09:27,866 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:09:27,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-24 00:09:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:09:28,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-24 00:09:28,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:09:28,088 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 [2024-11-24 00:09:28,397 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-24 00:09:28,397 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 [2024-11-24 00:09:28,582 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 [2024-11-24 00:09:32,988 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_19| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_19| (select (select |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_19|) (_ bv4 32))))) is different from true [2024-11-24 00:09:33,207 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 [2024-11-24 00:09:33,907 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 [2024-11-24 00:09:34,097 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 [2024-11-24 00:09:34,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-24 00:09:34,446 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:09:35,342 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:09:35,343 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 35 treesize of output 41 [2024-11-24 00:09:35,710 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:09:35,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292028731] [2024-11-24 00:09:35,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292028731] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:09:35,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1457244438] [2024-11-24 00:09:35,711 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:09:35,711 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-24 00:09:35,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-24 00:09:35,713 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-24 00:09:35,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2024-11-24 00:09:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:09:36,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-24 00:09:36,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:09:38,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:09:38,156 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 [2024-11-24 00:09:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:09:38,998 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:09:38,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1457244438] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:09:38,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 00:09:38,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 24 [2024-11-24 00:09:38,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718156058] [2024-11-24 00:09:38,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:09:38,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 00:09:38,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:09:38,999 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 00:09:39,000 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=632, Unknown=1, NotChecked=50, Total=756 [2024-11-24 00:09:39,000 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:09:42,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:09:42,100 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2024-11-24 00:09:42,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 00:09:42,100 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2024-11-24 00:09:42,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:09:42,101 INFO L225 Difference]: With dead ends: 95 [2024-11-24 00:09:42,101 INFO L226 Difference]: Without dead ends: 95 [2024-11-24 00:09:42,102 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=128, Invalid=1065, Unknown=1, NotChecked=66, Total=1260 [2024-11-24 00:09:42,103 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 69 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-24 00:09:42,103 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 194 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-24 00:09:42,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-24 00:09:42,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2024-11-24 00:09:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 69 states have (on average 1.173913043478261) internal successors, (81), 77 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-24 00:09:42,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2024-11-24 00:09:42,109 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 33 [2024-11-24 00:09:42,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:09:42,109 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2024-11-24 00:09:42,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 11 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:09:42,110 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2024-11-24 00:09:42,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-24 00:09:42,110 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:09:42,110 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] [2024-11-24 00:09:42,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-11-24 00:09:42,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2024-11-24 00:09:42,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt [2024-11-24 00:09:42,511 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:09:42,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:09:42,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1020452150, now seen corresponding path program 1 times [2024-11-24 00:09:42,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:09:42,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118013466] [2024-11-24 00:09:42,512 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:09:42,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:09:42,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:09:42,515 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:09:42,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-24 00:09:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:09:42,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-24 00:09:42,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:09:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:09:43,377 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:09:43,377 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:09:43,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118013466] [2024-11-24 00:09:43,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118013466] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:09:43,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:09:43,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-24 00:09:43,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993259415] [2024-11-24 00:09:43,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:09:43,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-24 00:09:43,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:09:43,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-24 00:09:43,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-24 00:09:43,379 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:09:44,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:09:44,014 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2024-11-24 00:09:44,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:09:44,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2024-11-24 00:09:44,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:09:44,015 INFO L225 Difference]: With dead ends: 88 [2024-11-24 00:09:44,015 INFO L226 Difference]: Without dead ends: 88 [2024-11-24 00:09:44,016 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-24 00:09:44,016 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 34 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-24 00:09:44,017 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 262 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-24 00:09:44,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-24 00:09:44,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2024-11-24 00:09:44,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 69 states have (on average 1.144927536231884) internal successors, (79), 76 states have internal predecessors, (79), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-24 00:09:44,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2024-11-24 00:09:44,025 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 33 [2024-11-24 00:09:44,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:09:44,026 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2024-11-24 00:09:44,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:09:44,026 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2024-11-24 00:09:44,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-24 00:09:44,027 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:09:44,027 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] [2024-11-24 00:09:44,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-24 00:09:44,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:09:44,228 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:09:44,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:09:44,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1123383287, now seen corresponding path program 1 times [2024-11-24 00:09:44,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:09:44,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960610022] [2024-11-24 00:09:44,229 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:09:44,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:09:44,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:09:44,233 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:09:44,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-24 00:09:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:09:44,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-24 00:09:44,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:09:45,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-24 00:09:45,499 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2024-11-24 00:09:45,499 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 43 treesize of output 33 [2024-11-24 00:09:45,658 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 52 treesize of output 28 [2024-11-24 00:09:45,999 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 46 treesize of output 22 [2024-11-24 00:09:50,754 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~#a19~0#1.base_8| (_ BitVec 32))) (and (= (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~#a19~0#1.base_8| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_entry_point_~#a19~0#1.base_8|)))) is different from true [2024-11-24 00:09:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:09:50,787 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:09:51,706 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_f19_~a#1.base|)) (.cse1 (bvadd (_ bv4 32) |c_ULTIMATE.start_probe_unsafe_19_~a#1.offset|))) (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_entry_point_~#a19~0#1.base|)) (forall ((v_ArrVal_762 (_ BitVec 32))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_f19_~a#1.base| (store .cse0 |c_ULTIMATE.start_f19_~a#1.offset| v_ArrVal_762)) |c_ULTIMATE.start_probe_unsafe_19_~a#1.base|) .cse1)))) (forall ((v_ArrVal_762 (_ BitVec 32))) (= |c_#valid| (let ((.cse2 (select (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_f19_~a#1.base| (store .cse0 |c_ULTIMATE.start_f19_~a#1.offset| v_ArrVal_762)) |c_ULTIMATE.start_probe_unsafe_19_~a#1.base|) .cse1))) (store (store |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_entry_point_~#a19~0#1.base| (select |c_#valid| |c_ULTIMATE.start_entry_point_~#a19~0#1.base|)) .cse2 (select |c_#valid| .cse2))))))) is different from false [2024-11-24 00:09:51,879 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:09:51,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960610022] [2024-11-24 00:09:51,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960610022] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:09:51,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2097545103] [2024-11-24 00:09:51,879 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:09:51,879 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-24 00:09:51,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-24 00:09:51,883 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-24 00:09:51,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2024-11-24 00:09:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:09:52,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-24 00:09:52,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:09:52,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:09:52,715 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 11 treesize of output 7 [2024-11-24 00:09:53,803 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 [2024-11-24 00:09:54,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:09:54,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:09:54,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:09:54,977 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2024-11-24 00:09:54,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 10 [2024-11-24 00:10:08,232 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-24 00:10:08,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 60 treesize of output 39 [2024-11-24 00:10:09,705 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 25 [2024-11-24 00:10:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:10:15,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:10:17,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2097545103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:10:17,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:10:17,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 22 [2024-11-24 00:10:17,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540342705] [2024-11-24 00:10:17,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 00:10:17,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-24 00:10:17,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:10:17,003 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-24 00:10:17,003 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=478, Unknown=6, NotChecked=90, Total=650 [2024-11-24 00:10:17,004 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 23 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 20 states have internal predecessors, (55), 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) [2024-11-24 00:10:21,290 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] [2024-11-24 00:10:29,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:10:40,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:10:46,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:10:58,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:10:59,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:11:04,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:11:08,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:11:12,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:11:16,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:11:20,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:11:24,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:11:28,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:11:33,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:11:37,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:11:37,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:11:37,431 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2024-11-24 00:11:37,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-24 00:11:37,436 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 20 states have internal predecessors, (55), 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 32 [2024-11-24 00:11:37,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:11:37,437 INFO L225 Difference]: With dead ends: 90 [2024-11-24 00:11:37,437 INFO L226 Difference]: Without dead ends: 72 [2024-11-24 00:11:37,438 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 67 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 45.4s TimeCoverageRelationStatistics Valid=136, Invalid=984, Unknown=10, NotChecked=130, Total=1260 [2024-11-24 00:11:37,438 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 61 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 15 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 61.0s IncrementalHoareTripleChecker+Time [2024-11-24 00:11:37,438 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 409 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 480 Invalid, 14 Unknown, 74 Unchecked, 61.0s Time] [2024-11-24 00:11:37,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-24 00:11:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-24 00:11:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 62 states have internal predecessors, (64), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-24 00:11:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2024-11-24 00:11:37,442 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 32 [2024-11-24 00:11:37,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:11:37,442 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2024-11-24 00:11:37,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 20 states have internal predecessors, (55), 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) [2024-11-24 00:11:37,443 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2024-11-24 00:11:37,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-24 00:11:37,443 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:11:37,443 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] [2024-11-24 00:11:37,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2024-11-24 00:11:37,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-11-24 00:11:37,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:11:37,845 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:11:37,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:11:37,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1569245520, now seen corresponding path program 1 times [2024-11-24 00:11:37,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:11:37,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824495096] [2024-11-24 00:11:37,845 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:11:37,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:11:37,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:11:37,848 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:11:37,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-24 00:11:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:11:38,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-24 00:11:38,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:11:38,411 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 [2024-11-24 00:11:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:11:38,953 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:11:38,953 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:11:38,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824495096] [2024-11-24 00:11:38,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824495096] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:11:38,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:11:38,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-24 00:11:38,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507861259] [2024-11-24 00:11:38,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:11:38,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 00:11:38,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:11:38,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 00:11:38,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2024-11-24 00:11:38,956 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:11:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:11:40,407 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2024-11-24 00:11:40,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 00:11:40,408 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2024-11-24 00:11:40,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:11:40,408 INFO L225 Difference]: With dead ends: 72 [2024-11-24 00:11:40,408 INFO L226 Difference]: Without dead ends: 72 [2024-11-24 00:11:40,409 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-24 00:11:40,409 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-24 00:11:40,409 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 316 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-24 00:11:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-24 00:11:40,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2024-11-24 00:11:40,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 61 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-24 00:11:40,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2024-11-24 00:11:40,414 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 34 [2024-11-24 00:11:40,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:11:40,414 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2024-11-24 00:11:40,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:11:40,414 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2024-11-24 00:11:40,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-24 00:11:40,415 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:11:40,415 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] [2024-11-24 00:11:40,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-24 00:11:40,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:11:40,616 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting f19_undoErr3ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:11:40,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:11:40,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1401970901, now seen corresponding path program 1 times [2024-11-24 00:11:40,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:11:40,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567000401] [2024-11-24 00:11:40,616 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:11:40,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:11:40,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:11:40,618 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:11:40,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-24 00:11:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:11:40,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-24 00:11:40,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:11:41,239 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 [2024-11-24 00:11:42,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-24 00:11:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:11:42,327 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:11:42,327 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:11:42,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567000401] [2024-11-24 00:11:42,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567000401] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:11:42,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:11:42,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-24 00:11:42,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120338721] [2024-11-24 00:11:42,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:11:42,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 00:11:42,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:11:42,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 00:11:42,330 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2024-11-24 00:11:42,330 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:11:44,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:11:44,284 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2024-11-24 00:11:44,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 00:11:44,286 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2024-11-24 00:11:44,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:11:44,287 INFO L225 Difference]: With dead ends: 71 [2024-11-24 00:11:44,287 INFO L226 Difference]: Without dead ends: 71 [2024-11-24 00:11:44,287 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-24 00:11:44,288 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 30 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:11:44,288 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 214 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-24 00:11:44,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-24 00:11:44,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-11-24 00:11:44,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 60 states have internal predecessors, (62), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-24 00:11:44,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2024-11-24 00:11:44,292 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 35 [2024-11-24 00:11:44,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:11:44,292 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2024-11-24 00:11:44,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:11:44,292 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2024-11-24 00:11:44,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-24 00:11:44,293 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:11:44,293 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] [2024-11-24 00:11:44,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-24 00:11:44,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:11:44,494 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:11:44,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:11:44,494 INFO L85 PathProgramCache]: Analyzing trace with hash -888579473, now seen corresponding path program 1 times [2024-11-24 00:11:44,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:11:44,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372942837] [2024-11-24 00:11:44,495 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:11:44,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:11:44,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:11:44,499 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:11:44,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-24 00:11:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:11:44,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-24 00:11:44,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:11:44,692 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 [2024-11-24 00:11:44,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-24 00:11:44,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 5 [2024-11-24 00:11:45,328 INFO L349 Elim1Store]: treesize reduction 42, result has 36.4 percent of original size [2024-11-24 00:11:45,328 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 27 treesize of output 32 [2024-11-24 00:11:45,479 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 43 treesize of output 25 [2024-11-24 00:11:45,776 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 5 [2024-11-24 00:11:46,546 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 30 treesize of output 19 [2024-11-24 00:11:46,678 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:11:46,678 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 37 treesize of output 15 [2024-11-24 00:11:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:11:46,819 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:11:57,312 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:11:57,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372942837] [2024-11-24 00:11:57,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372942837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:11:57,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [457606974] [2024-11-24 00:11:57,312 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:11:57,312 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-24 00:11:57,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-24 00:11:57,315 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-24 00:11:57,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2024-11-24 00:11:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:11:57,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-24 00:11:57,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:11:57,926 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 [2024-11-24 00:11:58,137 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 [2024-11-24 00:11:58,608 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 [2024-11-24 00:11:58,809 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2024-11-24 00:11:58,809 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 [2024-11-24 00:11:59,080 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 [2024-11-24 00:11:59,573 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 11 treesize of output 5 [2024-11-24 00:12:01,099 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 28 treesize of output 17 [2024-11-24 00:12:01,294 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:12:01,294 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 [2024-11-24 00:12:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:12:01,322 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:12:11,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [457606974] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:12:11,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:12:11,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2024-11-24 00:12:11,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780398913] [2024-11-24 00:12:11,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 00:12:11,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 00:12:11,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:12:11,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 00:12:11,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=741, Unknown=2, NotChecked=0, Total=870 [2024-11-24 00:12:11,148 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 25 states, 21 states have (on average 2.380952380952381) internal successors, (50), 19 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-24 00:12:13,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:12:13,013 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2024-11-24 00:12:13,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-24 00:12:13,014 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.380952380952381) internal successors, (50), 19 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2024-11-24 00:12:13,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:12:13,015 INFO L225 Difference]: With dead ends: 69 [2024-11-24 00:12:13,015 INFO L226 Difference]: Without dead ends: 69 [2024-11-24 00:12:13,016 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=142, Invalid=848, Unknown=2, NotChecked=0, Total=992 [2024-11-24 00:12:13,016 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-24 00:12:13,016 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 259 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-24 00:12:13,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-24 00:12:13,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-11-24 00:12:13,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 59 states have internal predecessors, (61), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-24 00:12:13,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2024-11-24 00:12:13,021 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 36 [2024-11-24 00:12:13,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:12:13,021 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2024-11-24 00:12:13,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.380952380952381) internal successors, (50), 19 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-24 00:12:13,021 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2024-11-24 00:12:13,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-24 00:12:13,022 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:12:13,022 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] [2024-11-24 00:12:13,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2024-11-24 00:12:13,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-11-24 00:12:13,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:13,423 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting f19_undoErr4ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:12:13,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:12:13,423 INFO L85 PathProgramCache]: Analyzing trace with hash 511425010, now seen corresponding path program 1 times [2024-11-24 00:12:13,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:12:13,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086366079] [2024-11-24 00:12:13,424 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:12:13,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:13,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:12:13,426 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:12:13,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-24 00:12:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:12:13,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-24 00:12:13,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:12:13,700 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 [2024-11-24 00:12:13,891 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 [2024-11-24 00:12:14,263 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 [2024-11-24 00:12:14,596 INFO L349 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2024-11-24 00:12:14,596 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 [2024-11-24 00:12:14,827 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 [2024-11-24 00:12:15,880 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 [2024-11-24 00:12:16,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:12:16,426 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 [2024-11-24 00:12:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:12:16,585 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:12:16,585 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:12:16,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086366079] [2024-11-24 00:12:16,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086366079] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:12:16,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:12:16,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2024-11-24 00:12:16,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384316352] [2024-11-24 00:12:16,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:12:16,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-24 00:12:16,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:12:16,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-24 00:12:16,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2024-11-24 00:12:16,587 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:12:19,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:12:19,516 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2024-11-24 00:12:19,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-24 00:12:19,517 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2024-11-24 00:12:19,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:12:19,518 INFO L225 Difference]: With dead ends: 72 [2024-11-24 00:12:19,518 INFO L226 Difference]: Without dead ends: 72 [2024-11-24 00:12:19,519 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2024-11-24 00:12:19,519 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 35 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-24 00:12:19,520 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 260 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-24 00:12:19,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-24 00:12:19,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-11-24 00:12:19,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 58 states have (on average 1.103448275862069) internal successors, (64), 62 states have internal predecessors, (64), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-24 00:12:19,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2024-11-24 00:12:19,524 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 36 [2024-11-24 00:12:19,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:12:19,525 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2024-11-24 00:12:19,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 14 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-24 00:12:19,525 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2024-11-24 00:12:19,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-24 00:12:19,526 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:12:19,526 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] [2024-11-24 00:12:19,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-11-24 00:12:19,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:19,727 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:12:19,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:12:19,728 INFO L85 PathProgramCache]: Analyzing trace with hash 421065940, now seen corresponding path program 1 times [2024-11-24 00:12:19,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:12:19,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687700521] [2024-11-24 00:12:19,729 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:12:19,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:19,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:12:19,732 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:12:19,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-24 00:12:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:12:19,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-24 00:12:19,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:12:19,948 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 [2024-11-24 00:12:20,147 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-24 00:12:20,148 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 [2024-11-24 00:12:20,276 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 19 treesize of output 1 [2024-11-24 00:12:24,702 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_34| (_ BitVec 32)) (|v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_29| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_34| (select (select |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_34|) (bvadd |v_ULTIMATE.start_f19_~a#1.offset_BEFORE_CALL_29| (_ bv4 32)))))) is different from true [2024-11-24 00:12:24,900 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 26 treesize of output 14 [2024-11-24 00:12:29,115 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_probe_unsafe_19_~a#1.offset_BEFORE_CALL_53| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_35| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$#2.base| |v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_35|) (bvadd |v_ULTIMATE.start_probe_unsafe_19_~a#1.offset_BEFORE_CALL_53| (_ bv4 32))) |v_ULTIMATE.start_entry_point_~#a19~0#1.base_BEFORE_CALL_35|))) is different from true [2024-11-24 00:12:29,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2024-11-24 00:12:29,467 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 [2024-11-24 00:12:29,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-11-24 00:12:29,670 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:12:29,920 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:12:29,921 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 33 [2024-11-24 00:12:30,458 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:12:30,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687700521] [2024-11-24 00:12:30,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687700521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:12:30,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1653428631] [2024-11-24 00:12:30,459 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:12:30,459 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-24 00:12:30,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-24 00:12:30,462 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-24 00:12:30,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2024-11-24 00:12:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:12:30,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-24 00:12:30,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:12:31,843 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 [2024-11-24 00:12:32,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:12:32,272 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 [2024-11-24 00:12:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:12:32,764 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:12:32,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1653428631] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:12:32,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 00:12:32,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 18 [2024-11-24 00:12:32,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541064675] [2024-11-24 00:12:32,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:12:32,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-24 00:12:32,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:12:32,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-24 00:12:32,766 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=262, Unknown=2, NotChecked=66, Total=380 [2024-11-24 00:12:32,766 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-24 00:12:34,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:12:34,121 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2024-11-24 00:12:34,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 00:12:34,121 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2024-11-24 00:12:34,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:12:34,122 INFO L225 Difference]: With dead ends: 72 [2024-11-24 00:12:34,122 INFO L226 Difference]: Without dead ends: 72 [2024-11-24 00:12:34,122 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=81, Invalid=387, Unknown=2, NotChecked=82, Total=552 [2024-11-24 00:12:34,123 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 38 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-24 00:12:34,123 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 118 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-24 00:12:34,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-24 00:12:34,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2024-11-24 00:12:34,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 61 states have internal predecessors, (63), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-24 00:12:34,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2024-11-24 00:12:34,127 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 40 [2024-11-24 00:12:34,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:12:34,127 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2024-11-24 00:12:34,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-24 00:12:34,128 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2024-11-24 00:12:34,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-24 00:12:34,128 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:12:34,128 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] [2024-11-24 00:12:34,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2024-11-24 00:12:34,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2024-11-24 00:12:34,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:34,529 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:12:34,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:12:34,530 INFO L85 PathProgramCache]: Analyzing trace with hash 917876118, now seen corresponding path program 1 times [2024-11-24 00:12:34,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:12:34,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [870764442] [2024-11-24 00:12:34,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:12:34,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:34,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:12:34,532 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:12:34,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-24 00:12:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:12:34,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-24 00:12:34,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:12:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:12:34,965 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 00:12:34,965 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:12:34,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870764442] [2024-11-24 00:12:34,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870764442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:12:34,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:12:34,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:12:34,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814588589] [2024-11-24 00:12:34,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:12:34,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:12:34,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:12:34,966 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:12:34,966 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:12:34,967 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-24 00:12:35,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:12:35,141 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2024-11-24 00:12:35,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 00:12:35,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2024-11-24 00:12:35,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:12:35,142 INFO L225 Difference]: With dead ends: 71 [2024-11-24 00:12:35,142 INFO L226 Difference]: Without dead ends: 71 [2024-11-24 00:12:35,143 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-24 00:12:35,143 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 1 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-24 00:12:35,144 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 210 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-24 00:12:35,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-24 00:12:35,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-11-24 00:12:35,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 61 states have internal predecessors, (62), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-24 00:12:35,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2024-11-24 00:12:35,147 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 42 [2024-11-24 00:12:35,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:12:35,148 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2024-11-24 00:12:35,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-24 00:12:35,148 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2024-11-24 00:12:35,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-24 00:12:35,149 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:12:35,149 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] [2024-11-24 00:12:35,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-24 00:12:35,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:35,350 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:12:35,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:12:35,350 INFO L85 PathProgramCache]: Analyzing trace with hash -993792357, now seen corresponding path program 1 times [2024-11-24 00:12:35,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:12:35,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223982238] [2024-11-24 00:12:35,351 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:12:35,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:12:35,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:12:35,353 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:12:35,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-24 00:12:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:12:35,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-24 00:12:35,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:12:36,250 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 [2024-11-24 00:12:36,829 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2024-11-24 00:12:36,829 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 23 treesize of output 15 [2024-11-24 00:12:45,550 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-24 00:12:45,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 81 treesize of output 64 [2024-11-24 00:12:48,040 INFO L349 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2024-11-24 00:12:48,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 66 [2024-11-24 00:12:49,820 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:12:49,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 104 treesize of output 88 [2024-11-24 00:12:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:12:54,822 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:12:59,377 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_f19_#t~ret42#1.base_101| (_ BitVec 32)) (v_ArrVal_1018 (_ BitVec 1))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_f19_#t~ret42#1.base_101|))) (= (store (let ((.cse0 (select (store |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_f19_~a#1.base| (store (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_f19_~a#1.base|) |c_ULTIMATE.start_f19_~a#1.offset| |v_ULTIMATE.start_f19_#t~ret42#1.base_101|)) |c_ULTIMATE.start_entry_point_~#a19~0#1.base|))) (store (store (store |c_#valid| |v_ULTIMATE.start_f19_#t~ret42#1.base_101| v_ArrVal_1018) (select .cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~#a19~0#1.offset|)) (_ bv0 1)) (select .cse0 |c_ULTIMATE.start_entry_point_~#a19~0#1.offset|) (_ bv0 1))) |c_ULTIMATE.start_entry_point_~#a19~0#1.base| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2024-11-24 00:12:59,386 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-24 00:12:59,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223982238] [2024-11-24 00:12:59,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223982238] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:12:59,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [657620171] [2024-11-24 00:12:59,386 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:12:59,386 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-24 00:12:59,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 [2024-11-24 00:12:59,389 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-24 00:12:59,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2024-11-24 00:12:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:12:59,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-24 00:12:59,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:13:00,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:13:00,741 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 11 treesize of output 7 [2024-11-24 00:13:10,302 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 [2024-11-24 00:13:11,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:13:11,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:13:11,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:13:11,950 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2024-11-24 00:13:11,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 10 [2024-11-24 00:13:14,683 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-24 00:13:14,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 112 [2024-11-24 00:13:23,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:13:23,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:13:23,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:13:23,899 INFO L349 Elim1Store]: treesize reduction 212, result has 25.1 percent of original size [2024-11-24 00:13:23,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 219 treesize of output 274 [2024-11-24 00:13:24,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:13:24,221 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-24 00:13:24,237 INFO L349 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2024-11-24 00:13:24,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 107 treesize of output 61 [2024-11-24 00:13:24,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:13:24,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 00:13:24,335 INFO L349 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2024-11-24 00:13:24,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2024-11-24 00:13:29,045 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-24 00:13:29,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 140 [2024-11-24 00:13:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:13:46,887 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:13:48,177 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 12 treesize of output 10 [2024-11-24 00:13:48,230 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 12 treesize of output 10 [2024-11-24 00:14:07,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [657620171] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:14:07,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:14:07,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 41 [2024-11-24 00:14:07,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073577545] [2024-11-24 00:14:07,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-24 00:14:07,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-24 00:14:07,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-24 00:14:07,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-24 00:14:07,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=3767, Unknown=13, NotChecked=124, Total=4160 [2024-11-24 00:14:07,605 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 42 states, 35 states have (on average 2.057142857142857) internal successors, (72), 36 states have internal predecessors, (72), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-24 00:14:11,984 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] [2024-11-24 00:14:20,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:14:24,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:14:33,117 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:14:37,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:14:41,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:14:49,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:15:24,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:15:33,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:15:37,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:15:41,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:15:45,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:15:49,574 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-24 00:15:53,746 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] [2024-11-24 00:15:54,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-24 00:15:54,147 INFO L93 Difference]: Finished difference Result 77 states and 76 transitions. [2024-11-24 00:15:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-24 00:15:54,149 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 35 states have (on average 2.057142857142857) internal successors, (72), 36 states have internal predecessors, (72), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2024-11-24 00:15:54,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-24 00:15:54,150 INFO L225 Difference]: With dead ends: 77 [2024-11-24 00:15:54,150 INFO L226 Difference]: Without dead ends: 59 [2024-11-24 00:15:54,152 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 112.8s TimeCoverageRelationStatistics Valid=465, Invalid=6662, Unknown=17, NotChecked=166, Total=7310 [2024-11-24 00:15:54,153 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 57 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 19 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.3s IncrementalHoareTripleChecker+Time [2024-11-24 00:15:54,153 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 611 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 980 Invalid, 20 Unknown, 0 Unchecked, 68.3s Time] [2024-11-24 00:15:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-24 00:15:54,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-11-24 00:15:54,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 50 states have internal predecessors, (50), 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) [2024-11-24 00:15:54,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 58 transitions. [2024-11-24 00:15:54,156 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 58 transitions. Word has length 42 [2024-11-24 00:15:54,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-24 00:15:54,156 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 58 transitions. [2024-11-24 00:15:54,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 35 states have (on average 2.057142857142857) internal successors, (72), 36 states have internal predecessors, (72), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-24 00:15:54,157 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 58 transitions. [2024-11-24 00:15:54,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-24 00:15:54,157 INFO L210 NwaCegarLoop]: Found error trace [2024-11-24 00:15:54,157 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, 1] [2024-11-24 00:15:54,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2024-11-24 00:15:54,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-24 00:15:54,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:15:54,558 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (and 21 more)] === [2024-11-24 00:15:54,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:15:54,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1624000383, now seen corresponding path program 1 times [2024-11-24 00:15:54,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-24 00:15:54,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839542744] [2024-11-24 00:15:54,559 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:15:54,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:15:54,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:15:54,562 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:15:54,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-24 00:15:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-24 00:15:54,827 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-24 00:15:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-24 00:15:54,952 INFO L130 FreeRefinementEngine]: Strategy FOX found a feasible trace [2024-11-24 00:15:54,953 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-24 00:15:54,954 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (23 of 24 remaining) [2024-11-24 00:15:54,957 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f19_undoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 24 remaining) [2024-11-24 00:15:54,957 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f19_undoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 24 remaining) [2024-11-24 00:15:54,958 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f19_undoErr2ASSERT_VIOLATIONMEMORY_FREE (20 of 24 remaining) [2024-11-24 00:15:54,958 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f19_undoErr3ASSERT_VIOLATIONMEMORY_FREE (19 of 24 remaining) [2024-11-24 00:15:54,958 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f19_undoErr4ASSERT_VIOLATIONMEMORY_FREE (18 of 24 remaining) [2024-11-24 00:15:54,958 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 24 remaining) [2024-11-24 00:15:54,958 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 24 remaining) [2024-11-24 00:15:54,958 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 24 remaining) [2024-11-24 00:15:54,959 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 24 remaining) [2024-11-24 00:15:54,959 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 24 remaining) [2024-11-24 00:15:54,959 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 24 remaining) [2024-11-24 00:15:54,959 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 24 remaining) [2024-11-24 00:15:54,959 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 24 remaining) [2024-11-24 00:15:54,960 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 24 remaining) [2024-11-24 00:15:54,960 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 24 remaining) [2024-11-24 00:15:54,960 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE (7 of 24 remaining) [2024-11-24 00:15:54,960 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE (6 of 24 remaining) [2024-11-24 00:15:54,960 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (5 of 24 remaining) [2024-11-24 00:15:54,960 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 24 remaining) [2024-11-24 00:15:54,960 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 24 remaining) [2024-11-24 00:15:54,961 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE (2 of 24 remaining) [2024-11-24 00:15:54,961 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (1 of 24 remaining) [2024-11-24 00:15:54,961 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (0 of 24 remaining) [2024-11-24 00:15:54,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-24 00:15:55,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:15:55,169 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:15:55,238 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-24 00:15:55,244 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 12:15:55 BoogieIcfgContainer [2024-11-24 00:15:55,244 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-24 00:15:55,245 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-24 00:15:55,245 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-24 00:15:55,246 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-24 00:15:55,247 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:04:53" (3/4) ... [2024-11-24 00:15:55,249 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-24 00:15:55,325 INFO L129 tionWitnessGenerator]: Generated YAML witness of length 22. [2024-11-24 00:15:55,463 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/witness.graphml [2024-11-24 00:15:55,464 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/witness.yml [2024-11-24 00:15:55,465 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-24 00:15:55,466 INFO L158 Benchmark]: Toolchain (without parser) took 664342.53ms. Allocated memory was 83.9MB in the beginning and 92.3MB in the end (delta: 8.4MB). Free memory was 58.7MB in the beginning and 53.0MB in the end (delta: 5.7MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. [2024-11-24 00:15:55,466 INFO L158 Benchmark]: CDTParser took 3.81ms. Allocated memory is still 83.9MB. Free memory was 64.4MB in the beginning and 64.4MB in the end (delta: 37.2kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-24 00:15:55,467 INFO L158 Benchmark]: CACSL2BoogieTranslator took 956.40ms. Allocated memory is still 83.9MB. Free memory was 58.7MB in the beginning and 30.6MB in the end (delta: 28.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-11-24 00:15:55,467 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.61ms. Allocated memory is still 83.9MB. Free memory was 30.6MB in the beginning and 28.5MB in the end (delta: 2.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-24 00:15:55,468 INFO L158 Benchmark]: Boogie Preprocessor took 83.94ms. Allocated memory is still 83.9MB. Free memory was 28.5MB in the beginning and 26.0MB in the end (delta: 2.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-24 00:15:55,468 INFO L158 Benchmark]: RCFGBuilder took 786.53ms. Allocated memory is still 83.9MB. Free memory was 26.0MB in the beginning and 43.6MB in the end (delta: -17.7MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. [2024-11-24 00:15:55,469 INFO L158 Benchmark]: TraceAbstraction took 662215.06ms. Allocated memory was 83.9MB in the beginning and 92.3MB in the end (delta: 8.4MB). Free memory was 43.1MB in the beginning and 59.0MB in the end (delta: -15.9MB). Peak memory consumption was 33.5MB. Max. memory is 16.1GB. [2024-11-24 00:15:55,469 INFO L158 Benchmark]: Witness Printer took 219.90ms. Allocated memory is still 92.3MB. Free memory was 59.0MB in the beginning and 53.0MB in the end (delta: 5.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-24 00:15:55,471 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 3.81ms. Allocated memory is still 83.9MB. Free memory was 64.4MB in the beginning and 64.4MB in the end (delta: 37.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 956.40ms. Allocated memory is still 83.9MB. Free memory was 58.7MB in the beginning and 30.6MB in the end (delta: 28.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 70.61ms. Allocated memory is still 83.9MB. Free memory was 30.6MB in the beginning and 28.5MB in the end (delta: 2.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 83.94ms. Allocated memory is still 83.9MB. Free memory was 28.5MB in the beginning and 26.0MB in the end (delta: 2.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 786.53ms. Allocated memory is still 83.9MB. Free memory was 26.0MB in the beginning and 43.6MB in the end (delta: -17.7MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. * TraceAbstraction took 662215.06ms. Allocated memory was 83.9MB in the beginning and 92.3MB in the end (delta: 8.4MB). Free memory was 43.1MB in the beginning and 59.0MB in the end (delta: -15.9MB). Peak memory consumption was 33.5MB. Max. memory is 16.1GB. * Witness Printer took 219.90ms. Allocated memory is still 92.3MB. Free memory was 59.0MB in the beginning and 53.0MB in the end (delta: 5.9MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 793]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; VAL [ldv_global_msg_list={1:0}] [L804] CALL entry_point() [L797] struct A19 a19; [L798] CALL, EXPR probe_unsafe_19(&a19) [L774] int ret = - -3; VAL [a={-2147483644:0}, ldv_global_msg_list={1:0}, ret=3] [L775] CALL, EXPR ldv_malloc(sizeof(int)) VAL [\old(size)=4, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L775] RET, EXPR ldv_malloc(sizeof(int)) VAL [a={-2147483644:0}, ldv_global_msg_list={1:0}, ret=3] [L775] a->q = (int *)ldv_malloc(sizeof(int)) VAL [ldv_global_msg_list={1:0}] [L776] EXPR a->q VAL [ldv_global_msg_list={1:0}] [L776] COND FALSE !(!a->q) [L777] CALL, EXPR f19(a) [L762] CALL, EXPR ldv_malloc(sizeof(int)) VAL [\old(size)=4, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L762] RET, EXPR ldv_malloc(sizeof(int)) VAL [a={-2147483644:0}, ldv_global_msg_list={1:0}] [L762] a->p = (int *)ldv_malloc(sizeof(int)) VAL [ldv_global_msg_list={1:0}] [L763] a->p VAL [ldv_global_msg_list={1:0}] [L763] COND TRUE a->p [L764] return 0; VAL [\result=0, ldv_global_msg_list={1:0}] [L777] RET, EXPR f19(a) [L777] ret = f19(a) [L778] COND FALSE !(\read(ret)) [L781] CALL, EXPR g19() [L771] return __VERIFIER_nondet_int(); [L781] RET, EXPR g19() [L781] COND TRUE !g19() [L786] CALL f19_undo(a) VAL [\old(a)={-2147483644:0}, ldv_global_msg_list={1:0}] [L768] EXPR a->p VAL [\old(a)={-2147483644:0}, ldv_global_msg_list={1:0}] [L768] free(a->p) VAL [\old(a)={-2147483644:0}, ldv_global_msg_list={1:0}] [L768] free(a->p) VAL [\old(a)={-2147483644:0}, ldv_global_msg_list={1:0}] [L768] free(a->p) [L786] RET f19_undo(a) VAL [a={-2147483644:0}, ldv_global_msg_list={1:0}, ret=0] [L788] EXPR a->q VAL [ldv_global_msg_list={1:0}] [L788] free(a->q) VAL [ldv_global_msg_list={1:0}, ret=0] [L788] free(a->q) VAL [ldv_global_msg_list={1:0}, ret=0] [L788] free(a->q) [L790] return ret; VAL [\result=0, ldv_global_msg_list={1:0}] [L798] RET, EXPR probe_unsafe_19(&a19) [L798] int ret = probe_unsafe_19(&a19); [L799] COND TRUE ret==0 [L800] CALL disconnect_19(&a19) [L793] EXPR a->q VAL [ldv_global_msg_list={1:0}] [L793] free(a->q) VAL [a={-2147483644:0}, ldv_global_msg_list={1:0}] [L793] free(a->q) VAL [a={-2147483644:0}, ldv_global_msg_list={1:0}] [L793] free(a->q) VAL [a={-2147483644:0}, ldv_global_msg_list={1:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 768]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 768]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 768]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 788]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 793]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 793]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 803]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 70 locations, 24 error locations. Started 1 CEGAR loops. OverallTime: 662.1s, OverallIterations: 41, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 380.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 72 mSolverCounterUnknown, 1316 SdHoareTripleChecker+Valid, 311.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1285 mSDsluCounter, 10307 SdHoareTripleChecker+Invalid, 308.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 827 IncrementalHoareTripleChecker+Unchecked, 8177 mSDsCounter, 220 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6314 IncrementalHoareTripleChecker+Invalid, 7433 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 220 mSolverCounterUnsat, 2130 mSDtfsCounter, 6314 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1899 GetRequests, 1332 SyntacticMatches, 36 SemanticMatches, 531 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 3513 ImplicationChecksByTransitivity, 278.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=12, InterpolantAutomatonStates: 386, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 40 MinimizatonAttempts, 119 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 261.0s InterpolantComputationTime, 1517 NumberOfCodeBlocks, 1517 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 1422 ConstructedInterpolants, 208 QuantifiedInterpolants, 18561 SizeOfPredicates, 243 NumberOfNonLiveVariables, 6329 ConjunctsInSsa, 946 ConjunctsInUnsatCore, 52 InterpolantComputations, 30 PerfectInterpolantSequences, 138/188 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-24 00:15:55,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1053d7a-f0c5-4141-bc5a-7b1b2581c364/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free)