./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0102-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0102-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 d10910cb8c44ec8f982d35122d9e66670129ee7c874265953b685f7f63a30072 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:58:34,382 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:58:34,456 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 22:58:34,462 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:58:34,463 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:58:34,491 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:58:34,492 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:58:34,493 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:58:34,494 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:58:34,494 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:58:34,496 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:58:34,496 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:58:34,497 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:58:34,498 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:58:34,499 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:58:34,499 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:58:34,500 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:58:34,501 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:58:34,501 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:58:34,502 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:58:34,503 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:58:34,504 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:58:34,504 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:58:34,505 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:58:34,506 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:58:34,506 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:58:34,507 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:58:34,508 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:58:34,508 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:58:34,509 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:58:34,510 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:58:34,510 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:58:34,511 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:58:34,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:58:34,512 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:58:34,512 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:58:34,512 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:58:34,513 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:58:34,513 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d10910cb8c44ec8f982d35122d9e66670129ee7c874265953b685f7f63a30072 [2023-11-06 22:58:34,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:58:34,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:58:34,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:58:34,921 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:58:34,922 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:58:34,923 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/memsafety/test-0102-2.i [2023-11-06 22:58:38,109 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:58:38,457 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:58:38,458 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/sv-benchmarks/c/memsafety/test-0102-2.i [2023-11-06 22:58:38,491 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/data/cdbda2883/65bb10e18a3b4e849c4f2af4ec9db733/FLAG160f02736 [2023-11-06 22:58:38,511 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/data/cdbda2883/65bb10e18a3b4e849c4f2af4ec9db733 [2023-11-06 22:58:38,518 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:58:38,523 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:58:38,527 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:58:38,528 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:58:38,534 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:58:38,537 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:38" (1/1) ... [2023-11-06 22:58:38,539 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2535a9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:38, skipping insertion in model container [2023-11-06 22:58:38,539 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:38" (1/1) ... [2023-11-06 22:58:38,607 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:58:38,979 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:58:38,993 ERROR L324 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) [2023-11-06 22:58:38,994 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@41b3f0d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:38, skipping insertion in model container [2023-11-06 22:58:38,994 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:58:38,994 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 22:58:38,996 INFO L158 Benchmark]: Toolchain (without parser) took 472.86ms. Allocated memory is still 163.6MB. Free memory was 117.1MB in the beginning and 104.8MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-06 22:58:38,997 INFO L158 Benchmark]: CDTParser took 0.56ms. Allocated memory is still 115.3MB. Free memory is still 90.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:58:38,998 INFO L158 Benchmark]: CACSL2BoogieTranslator took 467.14ms. Allocated memory is still 163.6MB. Free memory was 116.6MB in the beginning and 104.8MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-06 22:58:38,999 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56ms. Allocated memory is still 115.3MB. Free memory is still 90.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 467.14ms. Allocated memory is still 163.6MB. Free memory was 116.6MB in the beginning and 104.8MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 551]: 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/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0102-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 d10910cb8c44ec8f982d35122d9e66670129ee7c874265953b685f7f63a30072 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:58:41,607 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:58:41,760 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-06 22:58:41,768 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:58:41,769 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:58:41,816 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:58:41,816 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:58:41,817 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:58:41,818 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:58:41,823 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:58:41,824 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:58:41,824 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:58:41,824 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:58:41,826 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:58:41,827 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:58:41,827 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:58:41,828 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:58:41,828 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:58:41,828 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 22:58:41,829 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 22:58:41,830 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 22:58:41,830 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:58:41,831 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 22:58:41,831 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 22:58:41,831 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 22:58:41,832 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 22:58:41,832 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:58:41,833 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:58:41,834 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:58:41,834 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:58:41,835 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:58:41,835 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:58:41,836 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:58:41,836 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:58:41,836 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-06 22:58:41,837 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 22:58:41,837 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:58:41,837 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:58:41,837 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:58:41,838 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-06 22:58:41,838 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:58:41,839 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d10910cb8c44ec8f982d35122d9e66670129ee7c874265953b685f7f63a30072 [2023-11-06 22:58:42,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:58:42,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:58:42,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:58:42,262 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:58:42,263 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:58:42,264 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/memsafety/test-0102-2.i [2023-11-06 22:58:45,348 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:58:45,711 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:58:45,712 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/sv-benchmarks/c/memsafety/test-0102-2.i [2023-11-06 22:58:45,729 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/data/9c65f0420/b4aeeddcf1f6406ca0834da41ca601aa/FLAGa384a1cd8 [2023-11-06 22:58:45,746 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/data/9c65f0420/b4aeeddcf1f6406ca0834da41ca601aa [2023-11-06 22:58:45,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:58:45,750 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:58:45,760 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:58:45,760 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:58:45,766 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:58:45,767 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:45" (1/1) ... [2023-11-06 22:58:45,768 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54a27001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:45, skipping insertion in model container [2023-11-06 22:58:45,768 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:58:45" (1/1) ... [2023-11-06 22:58:45,817 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:58:46,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:58:46,310 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 22:58:46,332 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:58:46,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:58:46,394 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:58:46,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:58:46,552 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:58:46,553 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:46 WrapperNode [2023-11-06 22:58:46,553 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:58:46,555 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:58:46,555 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:58:46,555 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:58:46,563 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:46" (1/1) ... [2023-11-06 22:58:46,603 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:46" (1/1) ... [2023-11-06 22:58:46,646 INFO L138 Inliner]: procedures = 136, calls = 37, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 104 [2023-11-06 22:58:46,646 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:58:46,647 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:58:46,647 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:58:46,648 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:58:46,658 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:46" (1/1) ... [2023-11-06 22:58:46,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:46" (1/1) ... [2023-11-06 22:58:46,679 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:46" (1/1) ... [2023-11-06 22:58:46,679 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:46" (1/1) ... [2023-11-06 22:58:46,708 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:46" (1/1) ... [2023-11-06 22:58:46,711 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:46" (1/1) ... [2023-11-06 22:58:46,714 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:46" (1/1) ... [2023-11-06 22:58:46,716 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:46" (1/1) ... [2023-11-06 22:58:46,733 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:58:46,734 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:58:46,734 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:58:46,734 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:58:46,735 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:46" (1/1) ... [2023-11-06 22:58:46,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:58:46,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:58:46,770 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:58:46,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:58:46,818 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2023-11-06 22:58:46,818 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2023-11-06 22:58:46,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 22:58:46,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:58:46,819 INFO L130 BoogieDeclarations]: Found specification of procedure create_sub_list [2023-11-06 22:58:46,819 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sub_list [2023-11-06 22:58:46,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:58:46,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 22:58:46,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 22:58:46,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 22:58:46,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:58:46,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 22:58:46,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 22:58:46,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:58:46,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:58:46,980 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:58:46,983 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:58:47,487 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:58:47,498 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:58:47,502 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 22:58:47,505 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:47 BoogieIcfgContainer [2023-11-06 22:58:47,505 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:58:47,509 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:58:47,509 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:58:47,512 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:58:47,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:58:45" (1/3) ... [2023-11-06 22:58:47,513 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23eec773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:47, skipping insertion in model container [2023-11-06 22:58:47,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:58:46" (2/3) ... [2023-11-06 22:58:47,517 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23eec773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:47, skipping insertion in model container [2023-11-06 22:58:47,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:47" (3/3) ... [2023-11-06 22:58:47,518 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0102-2.i [2023-11-06 22:58:47,540 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:58:47,540 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2023-11-06 22:58:47,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:58:47,613 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@797baaf1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:58:47,613 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-11-06 22:58:47,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 47 states have (on average 1.872340425531915) internal successors, (88), 78 states have internal predecessors, (88), 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) [2023-11-06 22:58:47,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 22:58:47,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:47,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 22:58:47,627 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:58:47,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:47,635 INFO L85 PathProgramCache]: Analyzing trace with hash 61160987, now seen corresponding path program 1 times [2023-11-06 22:58:47,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:47,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348396944] [2023-11-06 22:58:47,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:47,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:47,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:47,660 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:47,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-06 22:58:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:47,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:58:47,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:47,804 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:47,805 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:47,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348396944] [2023-11-06 22:58:47,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348396944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:47,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:47,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:58:47,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789118971] [2023-11-06 22:58:47,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:47,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:58:47,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:47,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:58:47,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:58:47,864 INFO L87 Difference]: Start difference. First operand has 85 states, 47 states have (on average 1.872340425531915) internal successors, (88), 78 states have internal predecessors, (88), 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 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:47,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:47,888 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2023-11-06 22:58:47,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:58:47,890 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-06 22:58:47,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:47,898 INFO L225 Difference]: With dead ends: 85 [2023-11-06 22:58:47,899 INFO L226 Difference]: Without dead ends: 83 [2023-11-06 22:58:47,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:58:47,904 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:47,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:58:47,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-06 22:58:47,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-06 22:58:47,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 76 states have internal predecessors, (80), 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) [2023-11-06 22:58:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2023-11-06 22:58:47,948 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 5 [2023-11-06 22:58:47,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:47,949 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2023-11-06 22:58:47,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:47,949 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2023-11-06 22:58:47,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 22:58:47,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:47,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:47,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-06 22:58:48,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:48,151 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:58:48,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:48,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1372734583, now seen corresponding path program 1 times [2023-11-06 22:58:48,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:48,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890572952] [2023-11-06 22:58:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:48,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:48,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:48,155 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:48,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-06 22:58:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:48,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:58:48,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:48,290 INFO L351 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 [2023-11-06 22:58:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:48,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:48,337 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:48,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890572952] [2023-11-06 22:58:48,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890572952] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:48,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:48,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:58:48,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015828064] [2023-11-06 22:58:48,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:48,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:58:48,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:48,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:58:48,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:58:48,341 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:48,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:48,666 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2023-11-06 22:58:48,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:58:48,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-06 22:58:48,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:48,668 INFO L225 Difference]: With dead ends: 81 [2023-11-06 22:58:48,668 INFO L226 Difference]: Without dead ends: 81 [2023-11-06 22:58:48,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:58:48,670 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 27 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:48,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 186 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:58:48,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-06 22:58:48,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-06 22:58:48,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 74 states have internal predecessors, (78), 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) [2023-11-06 22:58:48,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2023-11-06 22:58:48,681 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 7 [2023-11-06 22:58:48,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:48,682 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2023-11-06 22:58:48,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:48,682 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2023-11-06 22:58:48,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 22:58:48,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:48,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:48,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:48,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:48,895 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:58:48,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:48,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1372734582, now seen corresponding path program 1 times [2023-11-06 22:58:48,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:48,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921699619] [2023-11-06 22:58:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:48,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:48,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:48,898 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:48,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-06 22:58:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:48,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:58:48,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:48,997 INFO L351 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 [2023-11-06 22:58:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:49,093 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:49,100 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:49,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921699619] [2023-11-06 22:58:49,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921699619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:49,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:49,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:58:49,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792206157] [2023-11-06 22:58:49,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:49,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:58:49,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:49,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:58:49,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:58:49,108 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:49,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:49,434 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2023-11-06 22:58:49,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:58:49,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-06 22:58:49,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:49,436 INFO L225 Difference]: With dead ends: 85 [2023-11-06 22:58:49,436 INFO L226 Difference]: Without dead ends: 85 [2023-11-06 22:58:49,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:58:49,438 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 5 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:49,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 243 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:58:49,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-06 22:58:49,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2023-11-06 22:58:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.653061224489796) internal successors, (81), 76 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 22:58:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2023-11-06 22:58:49,448 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 7 [2023-11-06 22:58:49,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:49,448 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2023-11-06 22:58:49,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:49,449 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2023-11-06 22:58:49,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 22:58:49,449 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:49,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:49,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:49,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:49,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting create_sub_listErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:58:49,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:49,662 INFO L85 PathProgramCache]: Analyzing trace with hash 576106609, now seen corresponding path program 1 times [2023-11-06 22:58:49,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:49,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129826150] [2023-11-06 22:58:49,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:49,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:49,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:49,664 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:49,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-06 22:58:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:49,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:58:49,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:49,781 INFO L351 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 [2023-11-06 22:58:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:49,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:49,798 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:49,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129826150] [2023-11-06 22:58:49,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129826150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:49,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:49,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:58:49,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110859005] [2023-11-06 22:58:49,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:49,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:58:49,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:49,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:58:49,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:58:49,807 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:49,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:49,962 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2023-11-06 22:58:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:58:49,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 22:58:49,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:49,964 INFO L225 Difference]: With dead ends: 83 [2023-11-06 22:58:49,964 INFO L226 Difference]: Without dead ends: 83 [2023-11-06 22:58:49,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:58:49,966 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:49,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 131 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:58:49,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-06 22:58:49,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-06 22:58:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 49 states have (on average 1.6326530612244898) internal successors, (80), 75 states have internal predecessors, (80), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 22:58:49,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2023-11-06 22:58:49,982 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 11 [2023-11-06 22:58:49,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:49,982 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2023-11-06 22:58:49,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:49,982 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2023-11-06 22:58:49,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 22:58:49,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:49,983 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:50,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:50,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:50,184 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting create_sub_listErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:58:50,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:50,185 INFO L85 PathProgramCache]: Analyzing trace with hash 576106610, now seen corresponding path program 1 times [2023-11-06 22:58:50,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:50,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145409776] [2023-11-06 22:58:50,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:50,186 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:50,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:50,187 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:50,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-06 22:58:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:50,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:58:50,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:50,296 INFO L351 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 [2023-11-06 22:58:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:50,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:50,320 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:50,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145409776] [2023-11-06 22:58:50,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145409776] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:50,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:50,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:58:50,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827628162] [2023-11-06 22:58:50,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:50,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:58:50,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:50,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:58:50,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:58:50,323 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:50,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:50,479 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2023-11-06 22:58:50,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:58:50,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 22:58:50,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:50,481 INFO L225 Difference]: With dead ends: 82 [2023-11-06 22:58:50,481 INFO L226 Difference]: Without dead ends: 82 [2023-11-06 22:58:50,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:58:50,482 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 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 [2023-11-06 22:58:50,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:58:50,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-06 22:58:50,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-11-06 22:58:50,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 74 states have internal predecessors, (79), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 22:58:50,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2023-11-06 22:58:50,491 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 11 [2023-11-06 22:58:50,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:50,491 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2023-11-06 22:58:50,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:50,492 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2023-11-06 22:58:50,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 22:58:50,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:50,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:50,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:50,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:50,709 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting list_add_tailErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:58:50,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:50,710 INFO L85 PathProgramCache]: Analyzing trace with hash 102783487, now seen corresponding path program 1 times [2023-11-06 22:58:50,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:50,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641027678] [2023-11-06 22:58:50,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:50,711 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:50,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:50,712 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:50,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-06 22:58:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:50,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:58:50,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:50,876 INFO L351 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 [2023-11-06 22:58:50,981 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 22:58:50,982 INFO L351 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 20 [2023-11-06 22:58:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:51,118 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:51,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:51,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1641027678] [2023-11-06 22:58:51,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1641027678] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:51,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:51,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:58:51,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987706996] [2023-11-06 22:58:51,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:51,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:58:51,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:51,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:58:51,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:58:51,122 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:51,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:51,846 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2023-11-06 22:58:51,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:58:51,847 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-06 22:58:51,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:51,848 INFO L225 Difference]: With dead ends: 101 [2023-11-06 22:58:51,848 INFO L226 Difference]: Without dead ends: 101 [2023-11-06 22:58:51,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:58:51,849 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 71 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:51,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 268 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:58:51,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-06 22:58:51,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2023-11-06 22:58:51,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 83 states have internal predecessors, (97), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 22:58:51,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2023-11-06 22:58:51,858 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 14 [2023-11-06 22:58:51,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:51,858 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2023-11-06 22:58:51,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:51,859 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2023-11-06 22:58:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 22:58:51,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:51,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:51,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:52,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:52,069 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting list_add_tailErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:58:52,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:52,069 INFO L85 PathProgramCache]: Analyzing trace with hash 102783488, now seen corresponding path program 1 times [2023-11-06 22:58:52,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:52,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761217357] [2023-11-06 22:58:52,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:52,070 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:52,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:52,096 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:52,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-06 22:58:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:52,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 22:58:52,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:52,277 INFO L351 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 [2023-11-06 22:58:52,285 INFO L351 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 [2023-11-06 22:58:52,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:58:52,467 INFO L351 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 [2023-11-06 22:58:52,482 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:58:52,482 INFO L351 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 [2023-11-06 22:58:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:52,590 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:52,590 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:52,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761217357] [2023-11-06 22:58:52,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761217357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:52,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:52,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 22:58:52,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904856291] [2023-11-06 22:58:52,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:52,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 22:58:52,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:52,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 22:58:52,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:58:52,593 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:53,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:53,437 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2023-11-06 22:58:53,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:58:53,438 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-06 22:58:53,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:53,439 INFO L225 Difference]: With dead ends: 119 [2023-11-06 22:58:53,439 INFO L226 Difference]: Without dead ends: 119 [2023-11-06 22:58:53,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-06 22:58:53,440 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 50 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:53,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 307 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:58:53,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-06 22:58:53,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2023-11-06 22:58:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 74 states have (on average 1.6486486486486487) internal successors, (122), 100 states have internal predecessors, (122), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 22:58:53,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 132 transitions. [2023-11-06 22:58:53,449 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 132 transitions. Word has length 14 [2023-11-06 22:58:53,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:53,449 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 132 transitions. [2023-11-06 22:58:53,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:53,450 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 132 transitions. [2023-11-06 22:58:53,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 22:58:53,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:53,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:53,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:53,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:53,664 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting list_add_tailErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:58:53,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:53,664 INFO L85 PathProgramCache]: Analyzing trace with hash -9313759, now seen corresponding path program 1 times [2023-11-06 22:58:53,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:53,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272048494] [2023-11-06 22:58:53,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:53,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:53,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:53,667 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:53,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-06 22:58:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:53,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:58:53,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:53,942 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:53,942 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:53,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272048494] [2023-11-06 22:58:53,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272048494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:53,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:53,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 22:58:53,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085948120] [2023-11-06 22:58:53,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:53,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:58:53,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:53,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:58:53,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:58:53,944 INFO L87 Difference]: Start difference. First operand 111 states and 132 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:54,495 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2023-11-06 22:58:54,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:58:54,496 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-06 22:58:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:54,498 INFO L225 Difference]: With dead ends: 118 [2023-11-06 22:58:54,498 INFO L226 Difference]: Without dead ends: 118 [2023-11-06 22:58:54,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:58:54,499 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 60 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:54,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 573 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:58:54,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-06 22:58:54,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 111. [2023-11-06 22:58:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 74 states have (on average 1.635135135135135) internal successors, (121), 100 states have internal predecessors, (121), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 22:58:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2023-11-06 22:58:54,505 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 16 [2023-11-06 22:58:54,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:54,505 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2023-11-06 22:58:54,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:54,506 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2023-11-06 22:58:54,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 22:58:54,506 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:54,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:54,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:54,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:54,719 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting list_add_tailErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:58:54,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:54,719 INFO L85 PathProgramCache]: Analyzing trace with hash -9313760, now seen corresponding path program 1 times [2023-11-06 22:58:54,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:54,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799914096] [2023-11-06 22:58:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:54,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:54,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:54,721 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:54,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-06 22:58:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:54,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:58:54,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:54,881 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:54,881 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:54,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799914096] [2023-11-06 22:58:54,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799914096] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:54,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:54,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:58:54,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300197038] [2023-11-06 22:58:54,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:54,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:58:54,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:54,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:58:54,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:58:54,884 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:55,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:55,052 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2023-11-06 22:58:55,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:58:55,053 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-06 22:58:55,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:55,054 INFO L225 Difference]: With dead ends: 110 [2023-11-06 22:58:55,054 INFO L226 Difference]: Without dead ends: 110 [2023-11-06 22:58:55,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:58:55,055 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 25 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:55,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 161 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:58:55,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-06 22:58:55,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-11-06 22:58:55,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 74 states have (on average 1.5945945945945945) internal successors, (118), 99 states have internal predecessors, (118), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 22:58:55,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 128 transitions. [2023-11-06 22:58:55,062 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 128 transitions. Word has length 16 [2023-11-06 22:58:55,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:55,062 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 128 transitions. [2023-11-06 22:58:55,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:55,062 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 128 transitions. [2023-11-06 22:58:55,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 22:58:55,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:55,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:55,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:55,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:55,276 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting list_add_tailErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:58:55,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:55,277 INFO L85 PathProgramCache]: Analyzing trace with hash -288726461, now seen corresponding path program 1 times [2023-11-06 22:58:55,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:55,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334279680] [2023-11-06 22:58:55,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:55,278 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:55,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:55,279 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:55,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-06 22:58:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:55,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:58:55,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:55,452 INFO L351 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 [2023-11-06 22:58:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:55,501 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:55,502 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:55,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334279680] [2023-11-06 22:58:55,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334279680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:55,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:55,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:58:55,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728998899] [2023-11-06 22:58:55,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:55,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:58:55,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:55,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:58:55,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:58:55,504 INFO L87 Difference]: Start difference. First operand 110 states and 128 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:55,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:55,875 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2023-11-06 22:58:55,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:58:55,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-06 22:58:55,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:55,877 INFO L225 Difference]: With dead ends: 115 [2023-11-06 22:58:55,877 INFO L226 Difference]: Without dead ends: 115 [2023-11-06 22:58:55,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:58:55,878 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 41 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:55,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 252 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:58:55,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-06 22:58:55,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 109. [2023-11-06 22:58:55,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 74 states have (on average 1.527027027027027) internal successors, (113), 98 states have internal predecessors, (113), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 22:58:55,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 123 transitions. [2023-11-06 22:58:55,887 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 123 transitions. Word has length 17 [2023-11-06 22:58:55,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:55,887 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 123 transitions. [2023-11-06 22:58:55,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 123 transitions. [2023-11-06 22:58:55,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 22:58:55,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:55,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:55,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:56,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:56,101 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting list_add_tailErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:58:56,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:56,102 INFO L85 PathProgramCache]: Analyzing trace with hash -288726460, now seen corresponding path program 1 times [2023-11-06 22:58:56,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:56,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550363586] [2023-11-06 22:58:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:56,102 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:56,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:56,103 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:56,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-06 22:58:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:56,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:58:56,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:56,272 INFO L351 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 [2023-11-06 22:58:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:56,383 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:56,383 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:56,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550363586] [2023-11-06 22:58:56,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550363586] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:56,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:56,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:58:56,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49868156] [2023-11-06 22:58:56,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:56,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:58:56,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:56,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:58:56,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:58:56,386 INFO L87 Difference]: Start difference. First operand 109 states and 123 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:56,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:56,853 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2023-11-06 22:58:56,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:58:56,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-06 22:58:56,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:56,855 INFO L225 Difference]: With dead ends: 113 [2023-11-06 22:58:56,855 INFO L226 Difference]: Without dead ends: 113 [2023-11-06 22:58:56,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:58:56,856 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 30 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:56,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 266 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:58:56,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-06 22:58:56,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2023-11-06 22:58:56,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 74 states have (on average 1.472972972972973) internal successors, (109), 98 states have internal predecessors, (109), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 22:58:56,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2023-11-06 22:58:56,861 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 17 [2023-11-06 22:58:56,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:56,862 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2023-11-06 22:58:56,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:56,862 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2023-11-06 22:58:56,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 22:58:56,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:56,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:56,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:57,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:57,076 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting list_add_tailErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:58:57,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:57,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1706748486, now seen corresponding path program 1 times [2023-11-06 22:58:57,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:57,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851028143] [2023-11-06 22:58:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:57,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:57,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:57,078 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:57,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-06 22:58:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:57,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 22:58:57,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:57,337 INFO L351 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 [2023-11-06 22:58:57,370 INFO L351 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 [2023-11-06 22:58:57,410 INFO L351 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 [2023-11-06 22:58:57,441 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:58:57,441 INFO L351 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 [2023-11-06 22:58:57,487 INFO L351 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 18 treesize of output 13 [2023-11-06 22:58:57,580 INFO L351 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 [2023-11-06 22:58:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:57,636 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:57,636 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:57,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851028143] [2023-11-06 22:58:57,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851028143] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:57,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:57,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-06 22:58:57,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664208700] [2023-11-06 22:58:57,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:57,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:58:57,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:57,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:58:57,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:58:57,638 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:58,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:58:58,628 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2023-11-06 22:58:58,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:58:58,628 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-06 22:58:58,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:58:58,631 INFO L225 Difference]: With dead ends: 136 [2023-11-06 22:58:58,631 INFO L226 Difference]: Without dead ends: 136 [2023-11-06 22:58:58,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:58:58,632 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 46 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:58:58,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 403 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:58:58,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-06 22:58:58,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 131. [2023-11-06 22:58:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 94 states have (on average 1.4148936170212767) internal successors, (133), 118 states have internal predecessors, (133), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 22:58:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 147 transitions. [2023-11-06 22:58:58,639 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 147 transitions. Word has length 19 [2023-11-06 22:58:58,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:58:58,640 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 147 transitions. [2023-11-06 22:58:58,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:58:58,640 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 147 transitions. [2023-11-06 22:58:58,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 22:58:58,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:58:58,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:58:58,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:58:58,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:58,852 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting list_add_tailErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:58:58,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:58:58,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1706748487, now seen corresponding path program 1 times [2023-11-06 22:58:58,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:58:58,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265982006] [2023-11-06 22:58:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:58:58,853 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:58:58,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:58:58,854 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:58:58,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-06 22:58:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:58:59,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 22:58:59,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:58:59,122 INFO L351 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 [2023-11-06 22:58:59,138 INFO L351 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 [2023-11-06 22:58:59,226 INFO L351 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 [2023-11-06 22:58:59,243 INFO L351 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 [2023-11-06 22:58:59,324 INFO L351 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 [2023-11-06 22:58:59,340 INFO L351 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 [2023-11-06 22:58:59,388 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:58:59,388 INFO L351 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 [2023-11-06 22:58:59,402 INFO L351 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 [2023-11-06 22:58:59,486 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:58:59,493 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:58:59,682 INFO L351 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 [2023-11-06 22:58:59,691 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 22:58:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:58:59,780 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:58:59,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:58:59,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265982006] [2023-11-06 22:58:59,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265982006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:58:59,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:58:59,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-06 22:58:59,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549055656] [2023-11-06 22:58:59,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:58:59,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:58:59,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:58:59,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:58:59,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:58:59,782 INFO L87 Difference]: Start difference. First operand 131 states and 147 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:01,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:01,342 INFO L93 Difference]: Finished difference Result 132 states and 147 transitions. [2023-11-06 22:59:01,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:59:01,342 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-06 22:59:01,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:01,344 INFO L225 Difference]: With dead ends: 132 [2023-11-06 22:59:01,345 INFO L226 Difference]: Without dead ends: 132 [2023-11-06 22:59:01,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:59:01,346 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 32 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:01,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 463 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:59:01,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-06 22:59:01,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2023-11-06 22:59:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 94 states have (on average 1.4042553191489362) internal successors, (132), 118 states have internal predecessors, (132), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-06 22:59:01,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2023-11-06 22:59:01,354 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 19 [2023-11-06 22:59:01,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:01,354 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2023-11-06 22:59:01,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:59:01,355 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2023-11-06 22:59:01,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 22:59:01,356 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:01,356 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:01,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:01,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:59:01,575 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:59:01,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:01,576 INFO L85 PathProgramCache]: Analyzing trace with hash -680278444, now seen corresponding path program 1 times [2023-11-06 22:59:01,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:59:01,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332553035] [2023-11-06 22:59:01,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:01,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:59:01,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:59:01,578 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:59:01,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-06 22:59:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:01,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:59:01,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:01,796 INFO L351 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 [2023-11-06 22:59:01,808 INFO L351 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 [2023-11-06 22:59:01,892 WARN L861 $PredicateComparison]: unable to prove that (exists ((|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (and (= (store |c_old(#length)| |create_sub_list_insert_sub_~sub~0#1.base| (select |c_#length| |create_sub_list_insert_sub_~sub~0#1.base|)) |c_#length|) (= (_ bv0 1) (select |c_old(#valid)| |create_sub_list_insert_sub_~sub~0#1.base|)))) is different from true [2023-11-06 22:59:01,923 INFO L351 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 8 treesize of output 1 [2023-11-06 22:59:01,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:59:01,989 INFO L351 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 [2023-11-06 22:59:02,004 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:59:02,004 INFO L351 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 [2023-11-06 22:59:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:02,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:02,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:59:02,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332553035] [2023-11-06 22:59:02,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332553035] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:02,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [66495749] [2023-11-06 22:59:02,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:02,521 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 22:59:02,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 [2023-11-06 22:59:02,526 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 22:59:02,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2023-11-06 22:59:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:02,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-06 22:59:02,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:02,986 INFO L351 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 [2023-11-06 22:59:02,993 INFO L351 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 [2023-11-06 22:59:03,221 INFO L351 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 8 treesize of output 1 [2023-11-06 22:59:03,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:59:03,635 INFO L351 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 [2023-11-06 22:59:03,645 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:59:03,648 INFO L351 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 [2023-11-06 22:59:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:03,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:04,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [66495749] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:04,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:59:04,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12] total 13 [2023-11-06 22:59:04,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084920054] [2023-11-06 22:59:04,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:04,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:59:04,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:59:04,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:59:04,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=264, Unknown=2, NotChecked=32, Total=342 [2023-11-06 22:59:04,342 INFO L87 Difference]: Start difference. First operand 131 states and 146 transitions. Second operand has 14 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-06 22:59:06,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:06,011 INFO L93 Difference]: Finished difference Result 148 states and 167 transitions. [2023-11-06 22:59:06,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:59:06,012 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2023-11-06 22:59:06,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:06,014 INFO L225 Difference]: With dead ends: 148 [2023-11-06 22:59:06,014 INFO L226 Difference]: Without dead ends: 148 [2023-11-06 22:59:06,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=80, Invalid=474, Unknown=2, NotChecked=44, Total=600 [2023-11-06 22:59:06,015 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 59 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:06,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 446 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 449 Invalid, 0 Unknown, 93 Unchecked, 1.3s Time] [2023-11-06 22:59:06,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-06 22:59:06,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 140. [2023-11-06 22:59:06,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 101 states have (on average 1.386138613861386) internal successors, (140), 124 states have internal predecessors, (140), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-06 22:59:06,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 157 transitions. [2023-11-06 22:59:06,022 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 157 transitions. Word has length 30 [2023-11-06 22:59:06,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:06,022 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 157 transitions. [2023-11-06 22:59:06,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-06 22:59:06,023 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 157 transitions. [2023-11-06 22:59:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 22:59:06,024 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:06,025 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:06,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:06,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:06,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:59:06,430 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting list_add_tailErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:59:06,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:06,430 INFO L85 PathProgramCache]: Analyzing trace with hash -980912138, now seen corresponding path program 1 times [2023-11-06 22:59:06,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:59:06,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820314633] [2023-11-06 22:59:06,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:06,431 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:59:06,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:59:06,432 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:59:06,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-06 22:59:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:06,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 22:59:06,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:06,801 INFO L351 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 8 treesize of output 1 [2023-11-06 22:59:07,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:59:07,044 INFO L351 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 [2023-11-06 22:59:07,054 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:59:07,055 INFO L351 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 [2023-11-06 22:59:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:07,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:10,395 INFO L351 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 98 treesize of output 94 [2023-11-06 22:59:10,470 INFO L322 Elim1Store]: treesize reduction 7, result has 77.4 percent of original size [2023-11-06 22:59:10,470 INFO L351 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 97 [2023-11-06 22:59:11,210 INFO L322 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-11-06 22:59:11,210 INFO L351 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 15 treesize of output 14 [2023-11-06 22:59:11,415 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:59:11,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820314633] [2023-11-06 22:59:11,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820314633] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:11,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2048321954] [2023-11-06 22:59:11,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:11,416 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 22:59:11,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 [2023-11-06 22:59:11,421 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 22:59:11,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2023-11-06 22:59:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:11,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-06 22:59:11,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:11,938 INFO L351 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 [2023-11-06 22:59:11,943 INFO L351 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 [2023-11-06 22:59:12,324 INFO L351 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 8 treesize of output 1 [2023-11-06 22:59:12,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:59:12,583 INFO L351 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 [2023-11-06 22:59:12,597 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:59:12,597 INFO L351 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 [2023-11-06 22:59:12,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:59:12,813 INFO L351 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 [2023-11-06 22:59:12,824 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 22:59:12,824 INFO L351 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 [2023-11-06 22:59:13,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:13,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:15,652 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:59:15,652 INFO L351 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 44 treesize of output 68 [2023-11-06 22:59:18,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2048321954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:18,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:59:18,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-06 22:59:18,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060309517] [2023-11-06 22:59:18,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:18,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 22:59:18,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:59:18,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 22:59:18,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1282, Unknown=2, NotChecked=0, Total=1406 [2023-11-06 22:59:18,392 INFO L87 Difference]: Start difference. First operand 140 states and 157 transitions. Second operand has 26 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 22:59:22,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:22,162 INFO L93 Difference]: Finished difference Result 190 states and 208 transitions. [2023-11-06 22:59:22,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 22:59:22,163 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2023-11-06 22:59:22,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:22,164 INFO L225 Difference]: With dead ends: 190 [2023-11-06 22:59:22,165 INFO L226 Difference]: Without dead ends: 190 [2023-11-06 22:59:22,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=476, Invalid=3554, Unknown=2, NotChecked=0, Total=4032 [2023-11-06 22:59:22,168 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 263 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:22,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 665 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-06 22:59:22,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-06 22:59:22,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 169. [2023-11-06 22:59:22,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 127 states have (on average 1.330708661417323) internal successors, (169), 150 states have internal predecessors, (169), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (11), 8 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-06 22:59:22,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 190 transitions. [2023-11-06 22:59:22,176 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 190 transitions. Word has length 37 [2023-11-06 22:59:22,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:22,176 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 190 transitions. [2023-11-06 22:59:22,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-06 22:59:22,177 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 190 transitions. [2023-11-06 22:59:22,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-06 22:59:22,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:22,178 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:22,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:22,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:22,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt [2023-11-06 22:59:22,580 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting list_add_tailErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:59:22,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:22,581 INFO L85 PathProgramCache]: Analyzing trace with hash -2036242001, now seen corresponding path program 1 times [2023-11-06 22:59:22,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:59:22,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039415742] [2023-11-06 22:59:22,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:22,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:59:22,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:59:22,583 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:59:22,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-06 22:59:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:23,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-06 22:59:23,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:23,057 INFO L351 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 [2023-11-06 22:59:23,121 INFO L351 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 [2023-11-06 22:59:23,131 INFO L351 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 [2023-11-06 22:59:23,188 INFO L351 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 [2023-11-06 22:59:23,198 INFO L351 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 [2023-11-06 22:59:23,245 INFO L322 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-11-06 22:59:23,245 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-11-06 22:59:23,367 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:59:23,384 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:59:23,433 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 22:59:23,439 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 22:59:24,619 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 22:59:24,627 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 63 [2023-11-06 22:59:24,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:59:24,645 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2023-11-06 22:59:24,653 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 15 [2023-11-06 22:59:25,043 INFO L322 Elim1Store]: treesize reduction 148, result has 26.4 percent of original size [2023-11-06 22:59:25,044 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 83 [2023-11-06 22:59:25,396 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 34 [2023-11-06 22:59:26,197 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2023-11-06 22:59:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:26,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:30,852 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 22:59:30,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039415742] [2023-11-06 22:59:30,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039415742] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:30,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1740855653] [2023-11-06 22:59:30,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:30,854 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 22:59:30,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 [2023-11-06 22:59:30,856 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 22:59:30,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2023-11-06 22:59:31,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:31,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-06 22:59:31,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:31,469 INFO L351 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 [2023-11-06 22:59:31,504 INFO L351 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 [2023-11-06 22:59:31,511 INFO L351 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 [2023-11-06 22:59:31,538 INFO L351 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 [2023-11-06 22:59:31,548 INFO L351 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 [2023-11-06 22:59:31,615 INFO L322 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-11-06 22:59:31,615 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-11-06 22:59:31,698 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:59:31,720 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:59:31,740 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 22:59:31,746 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 22:59:32,420 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 63 [2023-11-06 22:59:32,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:59:32,437 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2023-11-06 22:59:32,446 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 15 [2023-11-06 22:59:32,471 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 22:59:32,799 INFO L322 Elim1Store]: treesize reduction 156, result has 25.4 percent of original size [2023-11-06 22:59:32,800 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 46 treesize of output 76 [2023-11-06 22:59:33,221 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 34 [2023-11-06 22:59:33,897 INFO L351 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 0 case distinctions, treesize of input 38 treesize of output 18 [2023-11-06 22:59:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:34,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:59:39,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1740855653] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:59:39,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:59:39,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 26 [2023-11-06 22:59:39,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087251220] [2023-11-06 22:59:39,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:59:39,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 22:59:39,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 22:59:39,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 22:59:39,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1181, Unknown=39, NotChecked=0, Total=1332 [2023-11-06 22:59:39,989 INFO L87 Difference]: Start difference. First operand 169 states and 190 transitions. Second operand has 27 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:59:53,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:59:53,474 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2023-11-06 22:59:53,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-06 22:59:53,476 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2023-11-06 22:59:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:59:53,478 INFO L225 Difference]: With dead ends: 185 [2023-11-06 22:59:53,478 INFO L226 Difference]: Without dead ends: 185 [2023-11-06 22:59:53,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=289, Invalid=2528, Unknown=45, NotChecked=0, Total=2862 [2023-11-06 22:59:53,480 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 47 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:59:53,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 978 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-11-06 22:59:53,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-11-06 22:59:53,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2023-11-06 22:59:53,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 139 states have (on average 1.3093525179856116) internal successors, (182), 163 states have internal predecessors, (182), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (12), 8 states have call predecessors, (12), 11 states have call successors, (12) [2023-11-06 22:59:53,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 205 transitions. [2023-11-06 22:59:53,488 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 205 transitions. Word has length 36 [2023-11-06 22:59:53,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:59:53,489 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 205 transitions. [2023-11-06 22:59:53,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:59:53,489 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 205 transitions. [2023-11-06 22:59:53,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-06 22:59:53,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:59:53,491 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:59:53,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:53,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:59:53,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt [2023-11-06 22:59:53,904 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting list_add_tailErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 22:59:53,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:59:53,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2036242000, now seen corresponding path program 1 times [2023-11-06 22:59:53,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 22:59:53,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [695824912] [2023-11-06 22:59:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:59:53,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 22:59:53,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 22:59:53,907 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 22:59:53,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-06 22:59:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:59:54,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 93 conjunts are in the unsatisfiable core [2023-11-06 22:59:54,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:59:54,415 INFO L351 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 [2023-11-06 22:59:54,485 INFO L351 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 [2023-11-06 22:59:54,492 INFO L351 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 [2023-11-06 22:59:54,534 INFO L351 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 [2023-11-06 22:59:54,542 INFO L351 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 [2023-11-06 22:59:54,609 INFO L322 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-11-06 22:59:54,609 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-11-06 22:59:54,659 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 22:59:54,826 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:59:54,845 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:59:54,903 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 22:59:54,911 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 22:59:57,113 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 194 treesize of output 117 [2023-11-06 22:59:57,132 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 62 [2023-11-06 22:59:57,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:59:57,142 INFO L351 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 44 treesize of output 19 [2023-11-06 22:59:57,150 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2023-11-06 22:59:57,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:59:57,162 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2023-11-06 22:59:57,173 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 15 [2023-11-06 22:59:57,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:59:57,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 22:59:57,626 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-06 22:59:57,626 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2023-11-06 22:59:57,715 INFO L322 Elim1Store]: treesize reduction 72, result has 22.6 percent of original size [2023-11-06 22:59:57,715 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 44 [2023-11-06 22:59:58,010 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2023-11-06 22:59:58,027 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 22:59:58,571 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 22:59:58,579 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 22:59:58,580 INFO L351 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 36 treesize of output 16 [2023-11-06 22:59:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:59:58,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:00,307 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv4 32) |c_create_sub_list_insert_sub_~head#1.offset|))) (and (forall ((v_ArrVal_1038 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1038) |c_create_sub_list_insert_sub_~head#1.base|) .cse1))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_1038 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1037 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1038) |c_create_sub_list_insert_sub_~head#1.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1037) |c_create_sub_list_insert_sub_~head#1.base|) .cse1)))))) is different from false [2023-11-06 23:00:09,445 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:09,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [695824912] [2023-11-06 23:00:09,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [695824912] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:09,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2131537772] [2023-11-06 23:00:09,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:09,446 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 23:00:09,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 [2023-11-06 23:00:09,447 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 23:00:09,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2023-11-06 23:00:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:10,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 92 conjunts are in the unsatisfiable core [2023-11-06 23:00:10,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:10,259 INFO L351 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 [2023-11-06 23:00:10,292 INFO L351 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 [2023-11-06 23:00:10,299 INFO L351 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 [2023-11-06 23:00:10,311 INFO L351 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 [2023-11-06 23:00:10,326 INFO L351 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 [2023-11-06 23:00:10,376 INFO L322 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-11-06 23:00:10,376 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-11-06 23:00:10,396 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 23:00:10,516 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:00:10,536 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:00:10,564 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 23:00:10,571 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 23:00:15,911 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 124 [2023-11-06 23:00:15,922 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 62 [2023-11-06 23:00:15,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:15,931 INFO L351 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 44 treesize of output 19 [2023-11-06 23:00:15,938 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2023-11-06 23:00:15,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:15,951 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2023-11-06 23:00:15,962 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 15 [2023-11-06 23:00:16,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:16,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:00:16,256 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-06 23:00:16,257 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 21 [2023-11-06 23:00:16,341 INFO L322 Elim1Store]: treesize reduction 72, result has 22.6 percent of original size [2023-11-06 23:00:16,342 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 44 [2023-11-06 23:00:16,450 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:00:16,460 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 32 [2023-11-06 23:00:16,549 INFO L351 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 0 case distinctions, treesize of input 36 treesize of output 16 [2023-11-06 23:00:16,554 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 23:00:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:16,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:17,012 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv4 32) |c_create_sub_list_insert_sub_~head#1.offset|))) (and (forall ((v_ArrVal_1168 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1168) |c_create_sub_list_insert_sub_~head#1.base|) .cse1))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_1167 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1168 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1168) |c_create_sub_list_insert_sub_~head#1.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1167) |c_create_sub_list_insert_sub_~head#1.base|) .cse1)))))) is different from false [2023-11-06 23:00:27,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2131537772] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:00:27,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:00:27,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 26 [2023-11-06 23:00:27,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022383343] [2023-11-06 23:00:27,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:27,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-06 23:00:27,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:27,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-06 23:00:27,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1148, Unknown=16, NotChecked=138, Total=1406 [2023-11-06 23:00:27,852 INFO L87 Difference]: Start difference. First operand 183 states and 205 transitions. Second operand has 27 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:00:47,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:00:47,844 INFO L93 Difference]: Finished difference Result 186 states and 206 transitions. [2023-11-06 23:00:47,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 23:00:47,845 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2023-11-06 23:00:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:00:47,846 INFO L225 Difference]: With dead ends: 186 [2023-11-06 23:00:47,847 INFO L226 Difference]: Without dead ends: 186 [2023-11-06 23:00:47,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=214, Invalid=2126, Unknown=20, NotChecked=190, Total=2550 [2023-11-06 23:00:47,849 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 51 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 15 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:00:47,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 774 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 978 Invalid, 3 Unknown, 0 Unchecked, 9.2s Time] [2023-11-06 23:00:47,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-11-06 23:00:47,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2023-11-06 23:00:47,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 141 states have (on average 1.297872340425532) internal successors, (183), 166 states have internal predecessors, (183), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (12), 8 states have call predecessors, (12), 11 states have call successors, (12) [2023-11-06 23:00:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 206 transitions. [2023-11-06 23:00:47,858 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 206 transitions. Word has length 36 [2023-11-06 23:00:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:00:47,859 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 206 transitions. [2023-11-06 23:00:47,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-06 23:00:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 206 transitions. [2023-11-06 23:00:47,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-06 23:00:47,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:00:47,861 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:47,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:48,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:48,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:00:48,268 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting list_add_tailErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 23:00:48,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:48,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2058724713, now seen corresponding path program 1 times [2023-11-06 23:00:48,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:48,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1857906847] [2023-11-06 23:00:48,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:48,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:00:48,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:48,270 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:00:48,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-06 23:00:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:48,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 23:00:48,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:48,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:00:48,767 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:48,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1857906847] [2023-11-06 23:00:48,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1857906847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:00:48,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:00:48,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-06 23:00:48,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832201090] [2023-11-06 23:00:48,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:00:48,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 23:00:48,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:48,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 23:00:48,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:00:48,769 INFO L87 Difference]: Start difference. First operand 186 states and 206 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 23:00:49,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:00:49,555 INFO L93 Difference]: Finished difference Result 188 states and 202 transitions. [2023-11-06 23:00:49,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:00:49,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2023-11-06 23:00:49,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:00:49,558 INFO L225 Difference]: With dead ends: 188 [2023-11-06 23:00:49,558 INFO L226 Difference]: Without dead ends: 188 [2023-11-06 23:00:49,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:00:49,560 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 47 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:00:49,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 690 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:00:49,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-06 23:00:49,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2023-11-06 23:00:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 141 states have (on average 1.2695035460992907) internal successors, (179), 166 states have internal predecessors, (179), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (12), 8 states have call predecessors, (12), 11 states have call successors, (12) [2023-11-06 23:00:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 202 transitions. [2023-11-06 23:00:49,580 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 202 transitions. Word has length 39 [2023-11-06 23:00:49,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:00:49,581 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 202 transitions. [2023-11-06 23:00:49,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 23:00:49,581 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 202 transitions. [2023-11-06 23:00:49,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-06 23:00:49,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:00:49,583 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:00:49,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-11-06 23:00:49,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:00:49,788 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting list_add_tailErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 23:00:49,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:00:49,789 INFO L85 PathProgramCache]: Analyzing trace with hash 665130513, now seen corresponding path program 1 times [2023-11-06 23:00:49,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:00:49,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852479576] [2023-11-06 23:00:49,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:00:49,790 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:00:49,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:00:49,791 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:00:49,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-06 23:00:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:00:50,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-06 23:00:50,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:00:50,640 INFO L351 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 [2023-11-06 23:00:50,649 INFO L351 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 [2023-11-06 23:00:50,725 INFO L351 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 [2023-11-06 23:00:50,735 INFO L351 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 [2023-11-06 23:00:50,781 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 23:00:50,782 INFO L351 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 [2023-11-06 23:00:50,880 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:00:50,890 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:00:51,113 INFO L351 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 [2023-11-06 23:00:51,125 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 23:00:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:00:51,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:00:51,705 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:00:51,705 INFO L351 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 46 treesize of output 50 [2023-11-06 23:00:52,485 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) |c_create_sub_list_insert_sub_~head#1.offset|))) (and (forall ((v_ArrVal_1380 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_create_sub_list_insert_sub_~head#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1380) |c_create_sub_list_insert_sub_~head#1.base|) .cse0))) (forall ((v_ArrVal_1381 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1381) |c_create_sub_list_insert_sub_~head#1.base|) .cse0))) (bvule .cse1 (bvadd (_ bv4 32) .cse1)))) (forall ((v_ArrVal_1381 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_create_sub_list_insert_sub_~sub~0#1.base| v_ArrVal_1381) |c_create_sub_list_insert_sub_~head#1.base|) .cse0)) (bvadd (_ bv8 32) |c_create_sub_list_insert_sub_~head#1.offset|))))) is different from false [2023-11-06 23:00:55,834 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:00:55,834 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2023-11-06 23:00:55,839 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 32 [2023-11-06 23:00:55,847 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-06 23:00:55,915 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:00:55,915 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2023-11-06 23:00:55,919 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-06 23:00:55,922 INFO L351 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 24 treesize of output 12 [2023-11-06 23:00:55,943 INFO L322 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-11-06 23:00:55,943 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 1 [2023-11-06 23:00:57,066 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:00:57,066 INFO L351 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 38 treesize of output 62 [2023-11-06 23:00:57,442 INFO L322 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-11-06 23:00:57,443 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-06 23:00:57,488 INFO L322 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-11-06 23:00:57,489 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-06 23:00:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-06 23:00:57,547 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:00:57,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852479576] [2023-11-06 23:00:57,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852479576] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:00:57,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:00:57,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2023-11-06 23:00:57,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882944735] [2023-11-06 23:00:57,548 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:00:57,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-06 23:00:57,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:00:57,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-06 23:00:57,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=728, Unknown=12, NotChecked=54, Total=870 [2023-11-06 23:00:57,551 INFO L87 Difference]: Start difference. First operand 186 states and 202 transitions. Second operand has 30 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 7 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:01:00,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:02,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:04,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:06,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:09,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:11,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:13,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:15,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:17,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:19,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:21,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:23,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:26,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:28,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:30,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:32,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:34,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:43,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-06 23:01:47,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:01:47,897 INFO L93 Difference]: Finished difference Result 188 states and 202 transitions. [2023-11-06 23:01:47,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 23:01:47,898 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 7 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2023-11-06 23:01:47,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:01:47,899 INFO L225 Difference]: With dead ends: 188 [2023-11-06 23:01:47,900 INFO L226 Difference]: Without dead ends: 188 [2023-11-06 23:01:47,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=303, Invalid=2138, Unknown=13, NotChecked=96, Total=2550 [2023-11-06 23:01:47,901 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 126 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 42 mSolverCounterUnsat, 30 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 30 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 44.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:01:47,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 1016 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 815 Invalid, 30 Unknown, 75 Unchecked, 44.1s Time] [2023-11-06 23:01:47,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-06 23:01:47,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2023-11-06 23:01:47,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 141 states have (on average 1.2553191489361701) internal successors, (177), 166 states have internal predecessors, (177), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (12), 8 states have call predecessors, (12), 11 states have call successors, (12) [2023-11-06 23:01:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 200 transitions. [2023-11-06 23:01:47,910 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 200 transitions. Word has length 42 [2023-11-06 23:01:47,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:01:47,911 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 200 transitions. [2023-11-06 23:01:47,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 7 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 23:01:47,911 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 200 transitions. [2023-11-06 23:01:47,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-06 23:01:47,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:01:47,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:01:47,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-11-06 23:01:48,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:01:48,135 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 23:01:48,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:01:48,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1816872117, now seen corresponding path program 1 times [2023-11-06 23:01:48,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:01:48,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960523245] [2023-11-06 23:01:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:48,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:01:48,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:01:48,137 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:01:48,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-11-06 23:01:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:01:48,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-06 23:01:48,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:01:48,554 INFO L351 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 [2023-11-06 23:01:48,561 INFO L351 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 [2023-11-06 23:01:48,730 INFO L351 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 8 treesize of output 1 [2023-11-06 23:01:48,909 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 23:01:48,910 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-06 23:01:48,947 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 23:01:48,948 INFO L351 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 [2023-11-06 23:01:49,240 INFO L351 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 8 treesize of output 1 [2023-11-06 23:01:49,533 INFO L322 Elim1Store]: treesize reduction 71, result has 15.5 percent of original size [2023-11-06 23:01:49,534 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 79 [2023-11-06 23:01:49,628 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:01:49,628 INFO L351 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 39 treesize of output 63 [2023-11-06 23:01:50,204 INFO L322 Elim1Store]: treesize reduction 72, result has 6.5 percent of original size [2023-11-06 23:01:50,205 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 38 treesize of output 19 [2023-11-06 23:01:50,261 INFO L322 Elim1Store]: treesize reduction 102, result has 1.0 percent of original size [2023-11-06 23:01:50,261 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 38 treesize of output 1 [2023-11-06 23:01:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:01:50,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:01:51,149 INFO L322 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-11-06 23:01:51,149 INFO L351 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 15 treesize of output 14 [2023-11-06 23:01:59,392 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:01:59,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960523245] [2023-11-06 23:01:59,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960523245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:01:59,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1002488333] [2023-11-06 23:01:59,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:01:59,393 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 23:01:59,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 [2023-11-06 23:01:59,402 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 23:01:59,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2023-11-06 23:02:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:00,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-06 23:02:00,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:00,110 INFO L351 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 [2023-11-06 23:02:00,117 INFO L351 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 [2023-11-06 23:02:00,443 INFO L351 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 8 treesize of output 1 [2023-11-06 23:02:00,745 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 23:02:00,745 INFO L351 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 [2023-11-06 23:02:00,786 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 23:02:00,786 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-06 23:02:01,091 INFO L351 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 8 treesize of output 1 [2023-11-06 23:02:02,103 INFO L322 Elim1Store]: treesize reduction 71, result has 15.5 percent of original size [2023-11-06 23:02:02,104 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 79 [2023-11-06 23:02:02,181 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:02:02,182 INFO L351 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 39 treesize of output 63 [2023-11-06 23:02:02,976 INFO L322 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2023-11-06 23:02:02,976 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 5 [2023-11-06 23:02:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:02:03,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:03,737 INFO L322 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-11-06 23:02:03,737 INFO L351 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 15 treesize of output 14 [2023-11-06 23:02:05,897 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv16 32) |c_ULTIMATE.start_insert_top_~top~0#1.offset|)) (.cse0 (bvadd |c_ULTIMATE.start_insert_top_~top~0#1.offset| (_ bv24 32)))) (and (or (bvule (bvadd |c_ULTIMATE.start_insert_top_~top~0#1.offset| (_ bv20 32)) .cse0) (forall ((v_ArrVal_1597 (_ BitVec 32)) (|v_create_sub_list_insert_sub_~sub~0#1.base_80| (_ BitVec 32)) (|v_create_sub_list_insert_sub_~sub~0#1.base_81| (_ BitVec 32)) (v_ArrVal_1596 (_ BitVec 32))) (or (not (bvule .cse1 (select (store (store |c_#length| |v_create_sub_list_insert_sub_~sub~0#1.base_81| v_ArrVal_1597) |v_create_sub_list_insert_sub_~sub~0#1.base_80| v_ArrVal_1596) |c_ULTIMATE.start_insert_top_~top~0#1.base|))) (not (= (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_81|) (_ bv0 1))) (= |v_create_sub_list_insert_sub_~sub~0#1.base_80| |c_ULTIMATE.start_insert_top_~top~0#1.base|)))) (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_81| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_81|) (_ bv0 1))) (forall ((|v_create_sub_list_insert_sub_~sub~0#1.base_80| (_ BitVec 32))) (or (forall ((v_ArrVal_1597 (_ BitVec 32)) (v_ArrVal_1596 (_ BitVec 32))) (let ((.cse2 (select (store (store |c_#length| |v_create_sub_list_insert_sub_~sub~0#1.base_81| v_ArrVal_1597) |v_create_sub_list_insert_sub_~sub~0#1.base_80| v_ArrVal_1596) |c_ULTIMATE.start_insert_top_~top~0#1.base|))) (or (not (bvule .cse1 .cse2)) (bvule .cse0 .cse2)))) (= |v_create_sub_list_insert_sub_~sub~0#1.base_80| |c_ULTIMATE.start_insert_top_~top~0#1.base|))))))) is different from false [2023-11-06 23:02:05,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1002488333] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:05,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:02:05,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 21 [2023-11-06 23:02:05,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793267455] [2023-11-06 23:02:05,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:05,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 23:02:05,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:02:05,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 23:02:05,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=4, NotChecked=48, Total=702 [2023-11-06 23:02:05,911 INFO L87 Difference]: Start difference. First operand 186 states and 200 transitions. Second operand has 22 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 23:02:08,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:02:12,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:02:15,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:02:18,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:02:18,318 INFO L93 Difference]: Finished difference Result 235 states and 261 transitions. [2023-11-06 23:02:18,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-06 23:02:18,319 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 47 [2023-11-06 23:02:18,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:02:18,321 INFO L225 Difference]: With dead ends: 235 [2023-11-06 23:02:18,322 INFO L226 Difference]: Without dead ends: 235 [2023-11-06 23:02:18,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=179, Invalid=1303, Unknown=4, NotChecked=74, Total=1560 [2023-11-06 23:02:18,326 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 83 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 22 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:02:18,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 642 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 711 Invalid, 2 Unknown, 0 Unchecked, 10.2s Time] [2023-11-06 23:02:18,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-11-06 23:02:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 194. [2023-11-06 23:02:18,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 147 states have (on average 1.251700680272109) internal successors, (184), 171 states have internal predecessors, (184), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (14), 10 states have call predecessors, (14), 12 states have call successors, (14) [2023-11-06 23:02:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 210 transitions. [2023-11-06 23:02:18,341 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 210 transitions. Word has length 47 [2023-11-06 23:02:18,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:02:18,342 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 210 transitions. [2023-11-06 23:02:18,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 23:02:18,342 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 210 transitions. [2023-11-06 23:02:18,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-06 23:02:18,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:02:18,344 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:18,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:18,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:18,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:02:18,751 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting list_add_tailErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 23:02:18,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:18,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2009188439, now seen corresponding path program 1 times [2023-11-06 23:02:18,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:02:18,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [666881697] [2023-11-06 23:02:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:18,753 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:02:18,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:02:18,755 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:02:18,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-11-06 23:02:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:19,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 23:02:19,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:19,326 INFO L351 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 [2023-11-06 23:02:19,399 INFO L322 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-06 23:02:19,399 INFO L351 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 [2023-11-06 23:02:19,452 INFO L351 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 [2023-11-06 23:02:19,605 INFO L351 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 8 treesize of output 1 [2023-11-06 23:02:19,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:19,840 INFO L351 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 [2023-11-06 23:02:19,961 WARN L861 $PredicateComparison]: unable to prove that (exists ((|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (= |c_#valid| (store |c_old(#valid)| |create_sub_list_insert_sub_~sub~0#1.base| (_ bv1 1)))) is different from true [2023-11-06 23:02:19,973 INFO L351 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 [2023-11-06 23:02:20,056 WARN L861 $PredicateComparison]: unable to prove that (and (exists ((|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (= (_ bv0 1) (bvadd (select |c_#valid| |create_sub_list_insert_sub_~sub~0#1.base|) (_ bv1 1)))) (exists ((|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (= |c_#valid| (store |c_old(#valid)| |create_sub_list_insert_sub_~sub~0#1.base| (_ bv1 1))))) is different from true [2023-11-06 23:02:20,129 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:02:20,129 INFO L351 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 20 [2023-11-06 23:02:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2023-11-06 23:02:20,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:20,629 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:02:20,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [666881697] [2023-11-06 23:02:20,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [666881697] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:20,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [378152865] [2023-11-06 23:02:20,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:20,630 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 23:02:20,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 [2023-11-06 23:02:20,631 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 23:02:20,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2023-11-06 23:02:21,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:21,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 23:02:21,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:21,714 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 23:02:21,733 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 23:02:21,734 INFO L351 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 20 [2023-11-06 23:02:21,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:21,835 INFO L322 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2023-11-06 23:02:21,835 INFO L351 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 2 case distinctions, treesize of input 23 treesize of output 29 [2023-11-06 23:02:21,961 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-06 23:02:21,961 INFO L351 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 24 treesize of output 20 [2023-11-06 23:02:22,094 INFO L351 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 8 treesize of output 1 [2023-11-06 23:02:22,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:22,295 INFO L322 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2023-11-06 23:02:22,295 INFO L351 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 2 case distinctions, treesize of input 32 treesize of output 38 [2023-11-06 23:02:22,439 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-06 23:02:22,439 INFO L351 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 24 treesize of output 20 [2023-11-06 23:02:22,552 INFO L351 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 8 treesize of output 1 [2023-11-06 23:02:22,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:22,769 INFO L322 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2023-11-06 23:02:22,769 INFO L351 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 2 case distinctions, treesize of input 32 treesize of output 38 [2023-11-06 23:02:23,228 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-06 23:02:23,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:23,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [378152865] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:23,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:02:23,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2023-11-06 23:02:23,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520860742] [2023-11-06 23:02:23,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:23,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-06 23:02:23,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:02:23,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-06 23:02:23,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=466, Unknown=3, NotChecked=90, Total=650 [2023-11-06 23:02:23,355 INFO L87 Difference]: Start difference. First operand 194 states and 210 transitions. Second operand has 21 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 23:02:26,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:02:26,005 INFO L93 Difference]: Finished difference Result 272 states and 300 transitions. [2023-11-06 23:02:26,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 23:02:26,006 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 53 [2023-11-06 23:02:26,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:02:26,009 INFO L225 Difference]: With dead ends: 272 [2023-11-06 23:02:26,009 INFO L226 Difference]: Without dead ends: 272 [2023-11-06 23:02:26,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=199, Invalid=862, Unknown=3, NotChecked=126, Total=1190 [2023-11-06 23:02:26,010 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 306 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:02:26,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 367 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 575 Invalid, 0 Unknown, 328 Unchecked, 2.1s Time] [2023-11-06 23:02:26,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-11-06 23:02:26,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 217. [2023-11-06 23:02:26,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 165 states have (on average 1.2787878787878788) internal successors, (211), 189 states have internal predecessors, (211), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (21), 14 states have call predecessors, (21), 15 states have call successors, (21) [2023-11-06 23:02:26,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 247 transitions. [2023-11-06 23:02:26,023 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 247 transitions. Word has length 53 [2023-11-06 23:02:26,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:02:26,024 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 247 transitions. [2023-11-06 23:02:26,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 23:02:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 247 transitions. [2023-11-06 23:02:26,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-06 23:02:26,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:02:26,026 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:26,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:26,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:26,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt [2023-11-06 23:02:26,445 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting list_add_tailErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 23:02:26,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:26,445 INFO L85 PathProgramCache]: Analyzing trace with hash -2009188438, now seen corresponding path program 1 times [2023-11-06 23:02:26,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:02:26,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516172158] [2023-11-06 23:02:26,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:26,446 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:02:26,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:02:26,447 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:02:26,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-11-06 23:02:26,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:26,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-06 23:02:26,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:26,998 INFO L351 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 [2023-11-06 23:02:27,011 INFO L351 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 [2023-11-06 23:02:27,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:27,066 INFO L351 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 [2023-11-06 23:02:27,086 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 23:02:27,086 INFO L351 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 [2023-11-06 23:02:27,144 INFO L351 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 [2023-11-06 23:02:27,324 INFO L351 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 8 treesize of output 1 [2023-11-06 23:02:27,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:27,577 INFO L351 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 [2023-11-06 23:02:27,693 WARN L861 $PredicateComparison]: unable to prove that (exists ((|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |create_sub_list_insert_sub_~sub~0#1.base| (_ bv12 32)))) is different from true [2023-11-06 23:02:27,705 INFO L351 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 [2023-11-06 23:02:27,789 WARN L861 $PredicateComparison]: unable to prove that (and (exists ((|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (= (select |c_#length| |create_sub_list_insert_sub_~sub~0#1.base|) (_ bv12 32))) (exists ((|create_sub_list_insert_sub_~sub~0#1.base| (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |create_sub_list_insert_sub_~sub~0#1.base| (_ bv12 32))))) is different from true [2023-11-06 23:02:27,866 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-11-06 23:02:27,867 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2023-11-06 23:02:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2023-11-06 23:02:28,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:28,951 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-06 23:02:28,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516172158] [2023-11-06 23:02:28,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516172158] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:28,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1545345103] [2023-11-06 23:02:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:28,952 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 23:02:28,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 [2023-11-06 23:02:28,953 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 23:02:28,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2023-11-06 23:02:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:30,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-06 23:02:30,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:30,318 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 23:02:30,326 INFO L351 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 [2023-11-06 23:02:30,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:30,454 INFO L351 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 [2023-11-06 23:02:30,583 INFO L351 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 [2023-11-06 23:02:30,792 INFO L351 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 8 treesize of output 1 [2023-11-06 23:02:31,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:31,042 INFO L351 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 [2023-11-06 23:02:31,072 INFO L351 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 [2023-11-06 23:02:31,208 INFO L351 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 8 treesize of output 1 [2023-11-06 23:02:31,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:31,405 INFO L351 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 [2023-11-06 23:02:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-06 23:02:31,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:34,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1545345103] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:34,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:02:34,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 19 [2023-11-06 23:02:34,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437605350] [2023-11-06 23:02:34,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:34,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 23:02:34,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-06 23:02:34,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 23:02:34,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=436, Unknown=3, NotChecked=86, Total=600 [2023-11-06 23:02:34,180 INFO L87 Difference]: Start difference. First operand 217 states and 247 transitions. Second operand has 20 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 23:02:39,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:02:42,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-06 23:02:43,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:02:43,712 INFO L93 Difference]: Finished difference Result 234 states and 262 transitions. [2023-11-06 23:02:43,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 23:02:43,713 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 53 [2023-11-06 23:02:43,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:02:43,716 INFO L225 Difference]: With dead ends: 234 [2023-11-06 23:02:43,716 INFO L226 Difference]: Without dead ends: 234 [2023-11-06 23:02:43,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=180, Invalid=881, Unknown=3, NotChecked=126, Total=1190 [2023-11-06 23:02:43,717 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 236 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 51 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:02:43,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 473 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 692 Invalid, 2 Unknown, 257 Unchecked, 8.5s Time] [2023-11-06 23:02:43,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-06 23:02:43,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 217. [2023-11-06 23:02:43,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 165 states have (on average 1.2727272727272727) internal successors, (210), 189 states have internal predecessors, (210), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (21), 14 states have call predecessors, (21), 15 states have call successors, (21) [2023-11-06 23:02:43,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 246 transitions. [2023-11-06 23:02:43,730 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 246 transitions. Word has length 53 [2023-11-06 23:02:43,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:02:43,731 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 246 transitions. [2023-11-06 23:02:43,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 6 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 23:02:43,732 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 246 transitions. [2023-11-06 23:02:43,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-06 23:02:43,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:02:43,733 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:43,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:43,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:44,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/cvc4 --incremental --print-success --lang smt [2023-11-06 23:02:44,145 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting list_add_tailErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 23:02:44,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:44,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1921087130, now seen corresponding path program 2 times [2023-11-06 23:02:44,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-06 23:02:44,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413887121] [2023-11-06 23:02:44,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 23:02:44,146 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 23:02:44,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat [2023-11-06 23:02:44,147 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-06 23:02:44,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ca2712c-78cc-4f69-946e-86de9b3717d0/bin/uautomizer-verify-WvqO1wxjHP/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-11-06 23:02:45,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 23:02:45,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 23:02:45,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 111 conjunts are in the unsatisfiable core [2023-11-06 23:02:45,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:45,086 INFO L351 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 [2023-11-06 23:02:45,174 INFO L351 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 [2023-11-06 23:02:45,197 INFO L351 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 [2023-11-06 23:02:45,253 INFO L351 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 [2023-11-06 23:02:45,266 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-06 23:02:45,354 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 23:02:45,354 INFO L351 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 [2023-11-06 23:02:45,516 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-06 23:02:45,536 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-06 23:02:46,717 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 23:02:46,723 INFO L351 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 62 [2023-11-06 23:02:46,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:46,748 INFO L351 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 41 treesize of output 36 [2023-11-06 23:02:46,758 INFO L351 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 0 case distinctions, treesize of input 27 treesize of output 18 [2023-11-06 23:02:46,963 INFO L322 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-11-06 23:02:46,963 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-11-06 23:02:47,234 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 19 [2023-11-06 23:02:47,270 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8