./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0102-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0102-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fa260939b291574cde59d3c10d7828de68c26744f55119227115b01940792a6f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:45:06,362 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:45:06,475 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:45:06,487 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:45:06,488 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:45:06,529 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:45:06,530 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:45:06,530 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:45:06,532 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:45:06,537 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:45:06,537 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:45:06,538 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:45:06,539 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:45:06,541 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:45:06,542 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:45:06,542 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:45:06,543 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:45:06,543 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:45:06,544 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:45:06,544 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:45:06,545 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:45:06,545 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:45:06,546 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:45:06,546 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:45:06,547 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:45:06,547 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:45:06,548 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:45:06,548 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:45:06,549 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:45:06,550 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:45:06,551 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:45:06,551 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:45:06,552 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:45:06,552 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:45:06,552 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:45:06,552 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:45:06,553 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:45:06,553 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:45:06,553 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:45:06,553 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:45:06,554 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:45:06,554 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_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa260939b291574cde59d3c10d7828de68c26744f55119227115b01940792a6f [2023-11-24 21:45:06,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:45:06,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:45:06,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:45:06,907 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:45:06,908 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:45:06,909 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/memsafety/test-0102-1.i [2023-11-24 21:45:10,018 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:45:10,314 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:45:10,317 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/sv-benchmarks/c/memsafety/test-0102-1.i [2023-11-24 21:45:10,339 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/data/9a2e88776/e1545f403e124495abc2398b1f99ffc4/FLAGc062eca94 [2023-11-24 21:45:10,353 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/data/9a2e88776/e1545f403e124495abc2398b1f99ffc4 [2023-11-24 21:45:10,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:45:10,357 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:45:10,359 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:45:10,360 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:45:10,365 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:45:10,366 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:45:10" (1/1) ... [2023-11-24 21:45:10,368 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@733a006c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:10, skipping insertion in model container [2023-11-24 21:45:10,368 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:45:10" (1/1) ... [2023-11-24 21:45:10,414 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:45:10,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:45:10,849 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) [2023-11-24 21:45:10,850 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@64b5ebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:10, skipping insertion in model container [2023-11-24 21:45:10,850 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:45:10,851 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-24 21:45:10,853 INFO L158 Benchmark]: Toolchain (without parser) took 494.32ms. Allocated memory is still 148.9MB. Free memory was 104.4MB in the beginning and 91.8MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-24 21:45:10,854 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 113.2MB. Free memory was 81.3MB in the beginning and 81.3MB in the end (delta: 28.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:45:10,855 INFO L158 Benchmark]: CACSL2BoogieTranslator took 491.37ms. Allocated memory is still 148.9MB. Free memory was 104.0MB in the beginning and 91.8MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-24 21:45:10,857 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 113.2MB. Free memory was 81.3MB in the beginning and 81.3MB in the end (delta: 28.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 491.37ms. Allocated memory is still 148.9MB. Free memory was 104.0MB in the beginning and 91.8MB in the end (delta: 12.2MB). 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_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0102-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fa260939b291574cde59d3c10d7828de68c26744f55119227115b01940792a6f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:45:13,339 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:45:13,449 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-24 21:45:13,457 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:45:13,458 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:45:13,507 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:45:13,508 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:45:13,508 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:45:13,509 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:45:13,514 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:45:13,515 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:45:13,515 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:45:13,516 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:45:13,518 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:45:13,518 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:45:13,519 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:45:13,520 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:45:13,520 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:45:13,520 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:45:13,522 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:45:13,522 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:45:13,523 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:45:13,523 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:45:13,524 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:45:13,524 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:45:13,525 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-24 21:45:13,525 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-24 21:45:13,526 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:45:13,526 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:45:13,527 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:45:13,529 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:45:13,529 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:45:13,529 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:45:13,530 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:45:13,530 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:45:13,530 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:45:13,532 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:45:13,532 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-24 21:45:13,532 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-24 21:45:13,533 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:45:13,533 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:45:13,533 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:45:13,534 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:45:13,534 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-24 21:45:13,535 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_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fa260939b291574cde59d3c10d7828de68c26744f55119227115b01940792a6f [2023-11-24 21:45:13,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:45:13,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:45:13,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:45:13,985 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:45:13,986 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:45:13,987 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/memsafety/test-0102-1.i [2023-11-24 21:45:17,322 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:45:17,633 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:45:17,634 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/sv-benchmarks/c/memsafety/test-0102-1.i [2023-11-24 21:45:17,650 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/data/23cfbe5d0/94ff626a1fde425cbd3dfe5939f81c8a/FLAG2d871a4cb [2023-11-24 21:45:17,665 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/data/23cfbe5d0/94ff626a1fde425cbd3dfe5939f81c8a [2023-11-24 21:45:17,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:45:17,669 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:45:17,671 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:45:17,671 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:45:17,678 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:45:17,678 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:45:17" (1/1) ... [2023-11-24 21:45:17,679 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3520ccb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:17, skipping insertion in model container [2023-11-24 21:45:17,680 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:45:17" (1/1) ... [2023-11-24 21:45:17,748 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:45:18,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:45:18,237 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-24 21:45:18,249 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:45:18,321 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:45:18,331 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:45:18,399 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:45:18,439 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:45:18,440 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:18 WrapperNode [2023-11-24 21:45:18,440 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:45:18,441 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:45:18,441 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:45:18,442 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:45:18,449 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:18" (1/1) ... [2023-11-24 21:45:18,469 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:18" (1/1) ... [2023-11-24 21:45:18,494 INFO L138 Inliner]: procedures = 136, calls = 38, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 88 [2023-11-24 21:45:18,495 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:45:18,496 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:45:18,496 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:45:18,496 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:45:18,508 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:18" (1/1) ... [2023-11-24 21:45:18,508 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:18" (1/1) ... [2023-11-24 21:45:18,513 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:18" (1/1) ... [2023-11-24 21:45:18,535 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 4 initializations are split as follows [2, 2]. The 7 writes are split as follows [0, 7]. [2023-11-24 21:45:18,535 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:18" (1/1) ... [2023-11-24 21:45:18,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:18" (1/1) ... [2023-11-24 21:45:18,551 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:18" (1/1) ... [2023-11-24 21:45:18,554 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:18" (1/1) ... [2023-11-24 21:45:18,557 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:18" (1/1) ... [2023-11-24 21:45:18,559 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:18" (1/1) ... [2023-11-24 21:45:18,564 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:45:18,565 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:45:18,565 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:45:18,566 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:45:18,567 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:18" (1/1) ... [2023-11-24 21:45:18,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:45:18,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:45:18,607 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:45:18,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:45:18,657 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2023-11-24 21:45:18,658 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2023-11-24 21:45:18,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:45:18,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:45:18,658 INFO L130 BoogieDeclarations]: Found specification of procedure create_sub_list [2023-11-24 21:45:18,658 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sub_list [2023-11-24 21:45:18,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:45:18,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:45:18,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:45:18,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:45:18,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:45:18,662 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sub [2023-11-24 21:45:18,662 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sub [2023-11-24 21:45:18,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-24 21:45:18,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2023-11-24 21:45:18,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:45:18,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-24 21:45:18,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-24 21:45:18,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-11-24 21:45:18,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-11-24 21:45:18,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:45:18,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:45:18,844 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:45:18,847 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:45:19,380 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:45:19,435 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:45:19,435 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 21:45:19,436 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:45:19 BoogieIcfgContainer [2023-11-24 21:45:19,436 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:45:19,438 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:45:19,439 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:45:19,442 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:45:19,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:45:17" (1/3) ... [2023-11-24 21:45:19,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d21476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:45:19, skipping insertion in model container [2023-11-24 21:45:19,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:45:18" (2/3) ... [2023-11-24 21:45:19,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73d21476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:45:19, skipping insertion in model container [2023-11-24 21:45:19,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:45:19" (3/3) ... [2023-11-24 21:45:19,445 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0102-1.i [2023-11-24 21:45:19,464 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:45:19,464 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2023-11-24 21:45:19,503 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:45:19,514 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;@5cffdab2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:45:19,515 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-11-24 21:45:19,520 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 37 states have (on average 2.108108108108108) internal successors, (78), 68 states have internal predecessors, (78), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 21:45:19,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 21:45:19,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:45:19,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 21:45:19,531 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)] === [2023-11-24 21:45:19,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:19,536 INFO L85 PathProgramCache]: Analyzing trace with hash 5886764, now seen corresponding path program 1 times [2023-11-24 21:45:19,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:45:19,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761707714] [2023-11-24 21:45:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:19,547 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 [2023-11-24 21:45:19,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:45:19,550 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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) [2023-11-24 21:45:19,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:19,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:19,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-24 21:45:19,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:19,661 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:45:19,661 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:45:19,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761707714] [2023-11-24 21:45:19,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761707714] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:19,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:19,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:45:19,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831576108] [2023-11-24 21:45:19,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:19,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:45:19,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:45:19,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:45:19,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:45:19,702 INFO L87 Difference]: Start difference. First operand has 78 states, 37 states have (on average 2.108108108108108) internal successors, (78), 68 states have internal predecessors, (78), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2023-11-24 21:45:19,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:45:19,776 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2023-11-24 21:45:19,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:45:19,779 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2023-11-24 21:45:19,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:45:19,787 INFO L225 Difference]: With dead ends: 78 [2023-11-24 21:45:19,788 INFO L226 Difference]: Without dead ends: 77 [2023-11-24 21:45:19,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:45:19,795 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:45:19,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:45:19,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-24 21:45:19,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-24 21:45:19,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 67 states have internal predecessors, (71), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 21:45:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2023-11-24 21:45:19,850 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 4 [2023-11-24 21:45:19,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:45:19,851 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2023-11-24 21:45:19,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2023-11-24 21:45:19,851 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2023-11-24 21:45:19,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:45:19,852 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:45:19,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:45:19,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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)] Forceful destruction successful, exit code 0 [2023-11-24 21:45:20,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:20,054 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)] === [2023-11-24 21:45:20,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:20,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1343268717, now seen corresponding path program 1 times [2023-11-24 21:45:20,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:45:20,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [566248149] [2023-11-24 21:45:20,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:20,060 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 [2023-11-24 21:45:20,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:45:20,062 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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) [2023-11-24 21:45:20,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:20,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:45:20,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:20,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:45:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:20,295 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:45:20,295 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:45:20,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [566248149] [2023-11-24 21:45:20,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [566248149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:20,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:20,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:45:20,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594766903] [2023-11-24 21:45:20,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:20,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:45:20,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:45:20,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:45:20,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:45:20,306 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2023-11-24 21:45:20,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:45:20,637 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2023-11-24 21:45:20,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:45:20,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 6 [2023-11-24 21:45:20,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:45:20,639 INFO L225 Difference]: With dead ends: 75 [2023-11-24 21:45:20,639 INFO L226 Difference]: Without dead ends: 75 [2023-11-24 21:45:20,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:45:20,641 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 25 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:45:20,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 159 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:45:20,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-24 21:45:20,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-11-24 21:45:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 37 states have (on average 1.864864864864865) internal successors, (69), 65 states have internal predecessors, (69), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 21:45:20,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2023-11-24 21:45:20,652 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 6 [2023-11-24 21:45:20,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:45:20,653 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2023-11-24 21:45:20,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2023-11-24 21:45:20,653 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2023-11-24 21:45:20,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:45:20,653 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:45:20,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:45:20,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:20,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:20,856 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)] === [2023-11-24 21:45:20,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:20,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1343268718, now seen corresponding path program 1 times [2023-11-24 21:45:20,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:45:20,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134474542] [2023-11-24 21:45:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:20,858 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 [2023-11-24 21:45:20,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:45:20,859 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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) [2023-11-24 21:45:20,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:20,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-24 21:45:20,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:20,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:45:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:21,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:45:21,034 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:45:21,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134474542] [2023-11-24 21:45:21,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134474542] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:21,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:21,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:45:21,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026606563] [2023-11-24 21:45:21,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:21,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:45:21,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:45:21,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:45:21,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:45:21,037 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2023-11-24 21:45:21,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:45:21,385 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2023-11-24 21:45:21,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:45:21,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 6 [2023-11-24 21:45:21,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:45:21,389 INFO L225 Difference]: With dead ends: 79 [2023-11-24 21:45:21,389 INFO L226 Difference]: Without dead ends: 79 [2023-11-24 21:45:21,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:45:21,391 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 5 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:45:21,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 212 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:45:21,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-24 21:45:21,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2023-11-24 21:45:21,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 40 states have (on average 1.8) internal successors, (72), 67 states have internal predecessors, (72), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 21:45:21,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2023-11-24 21:45:21,401 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 6 [2023-11-24 21:45:21,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:45:21,406 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2023-11-24 21:45:21,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2023-11-24 21:45:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2023-11-24 21:45:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 21:45:21,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:45:21,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:21,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:21,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:21,610 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)] === [2023-11-24 21:45:21,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:21,611 INFO L85 PathProgramCache]: Analyzing trace with hash -10941867, now seen corresponding path program 1 times [2023-11-24 21:45:21,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:45:21,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242413949] [2023-11-24 21:45:21,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:21,612 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 [2023-11-24 21:45:21,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:45:21,614 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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) [2023-11-24 21:45:21,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:21,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:45:21,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:21,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:45:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:21,727 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:45:21,728 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:45:21,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242413949] [2023-11-24 21:45:21,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242413949] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:21,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:21,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:45:21,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446633408] [2023-11-24 21:45:21,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:21,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:45:21,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:45:21,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:45:21,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:45:21,730 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-24 21:45:21,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:45:21,864 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2023-11-24 21:45:21,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:45:21,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2023-11-24 21:45:21,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:45:21,866 INFO L225 Difference]: With dead ends: 77 [2023-11-24 21:45:21,866 INFO L226 Difference]: Without dead ends: 77 [2023-11-24 21:45:21,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:45:21,867 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 2 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:45:21,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:45:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-24 21:45:21,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-24 21:45:21,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 40 states have (on average 1.775) internal successors, (71), 66 states have internal predecessors, (71), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 21:45:21,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2023-11-24 21:45:21,877 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 10 [2023-11-24 21:45:21,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:45:21,877 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2023-11-24 21:45:21,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-24 21:45:21,878 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2023-11-24 21:45:21,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 21:45:21,878 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:45:21,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:21,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:22,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:22,081 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)] === [2023-11-24 21:45:22,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:22,082 INFO L85 PathProgramCache]: Analyzing trace with hash -10941866, now seen corresponding path program 1 times [2023-11-24 21:45:22,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:45:22,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1911234847] [2023-11-24 21:45:22,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:22,083 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 [2023-11-24 21:45:22,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:45:22,085 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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) [2023-11-24 21:45:22,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:22,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:45:22,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:22,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:45:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:22,228 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:45:22,228 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:45:22,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1911234847] [2023-11-24 21:45:22,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1911234847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:22,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:22,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:45:22,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143526405] [2023-11-24 21:45:22,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:22,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:45:22,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:45:22,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:45:22,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:45:22,235 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-24 21:45:22,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:45:22,409 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2023-11-24 21:45:22,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:45:22,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2023-11-24 21:45:22,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:45:22,427 INFO L225 Difference]: With dead ends: 76 [2023-11-24 21:45:22,428 INFO L226 Difference]: Without dead ends: 76 [2023-11-24 21:45:22,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:45:22,429 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:45:22,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 116 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:45:22,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-24 21:45:22,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-11-24 21:45:22,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 40 states have (on average 1.75) internal successors, (70), 65 states have internal predecessors, (70), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 21:45:22,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2023-11-24 21:45:22,436 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 10 [2023-11-24 21:45:22,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:45:22,437 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2023-11-24 21:45:22,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-24 21:45:22,437 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2023-11-24 21:45:22,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:45:22,440 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:45:22,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:22,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:22,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:22,643 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)] === [2023-11-24 21:45:22,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:22,643 INFO L85 PathProgramCache]: Analyzing trace with hash 448465278, now seen corresponding path program 1 times [2023-11-24 21:45:22,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:45:22,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102466709] [2023-11-24 21:45:22,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:22,644 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 [2023-11-24 21:45:22,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:45:22,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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) [2023-11-24 21:45:22,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:22,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-24 21:45:22,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:22,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:45:22,914 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-24 21:45:22,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-24 21:45:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:23,068 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:45:23,069 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:45:23,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102466709] [2023-11-24 21:45:23,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102466709] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:23,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:23,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:45:23,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638823610] [2023-11-24 21:45:23,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:23,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:45:23,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:45:23,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:45:23,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:45:23,071 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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) [2023-11-24 21:45:23,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:45:23,836 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2023-11-24 21:45:23,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:45:23,837 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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 13 [2023-11-24 21:45:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:45:23,838 INFO L225 Difference]: With dead ends: 92 [2023-11-24 21:45:23,838 INFO L226 Difference]: Without dead ends: 92 [2023-11-24 21:45:23,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:45:23,839 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 60 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:45:23,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 235 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:45:23,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-24 21:45:23,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2023-11-24 21:45:23,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 71 states have internal predecessors, (85), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 21:45:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2023-11-24 21:45:23,847 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 13 [2023-11-24 21:45:23,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:45:23,848 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2023-11-24 21:45:23,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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) [2023-11-24 21:45:23,848 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2023-11-24 21:45:23,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:45:23,848 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:45:23,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:23,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:24,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:24,053 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)] === [2023-11-24 21:45:24,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:24,053 INFO L85 PathProgramCache]: Analyzing trace with hash 448465279, now seen corresponding path program 1 times [2023-11-24 21:45:24,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:45:24,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1873827021] [2023-11-24 21:45:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:24,054 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 [2023-11-24 21:45:24,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:45:24,055 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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) [2023-11-24 21:45:24,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:24,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-24 21:45:24,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:24,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:45:24,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:45:24,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:45:24,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:45:24,393 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-24 21:45:24,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-24 21:45:24,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:24,490 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:45:24,490 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:45:24,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1873827021] [2023-11-24 21:45:24,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1873827021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:24,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:24,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:45:24,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546401060] [2023-11-24 21:45:24,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:24,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:45:24,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:45:24,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:45:24,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:45:24,493 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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) [2023-11-24 21:45:25,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:45:25,252 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2023-11-24 21:45:25,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:45:25,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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 13 [2023-11-24 21:45:25,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:45:25,254 INFO L225 Difference]: With dead ends: 106 [2023-11-24 21:45:25,254 INFO L226 Difference]: Without dead ends: 106 [2023-11-24 21:45:25,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:45:25,255 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 42 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:45:25,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 267 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:45:25,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-24 21:45:25,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 98. [2023-11-24 21:45:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 58 states have (on average 1.8275862068965518) internal successors, (106), 84 states have internal predecessors, (106), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 21:45:25,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2023-11-24 21:45:25,264 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 13 [2023-11-24 21:45:25,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:45:25,264 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2023-11-24 21:45:25,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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) [2023-11-24 21:45:25,264 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2023-11-24 21:45:25,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 21:45:25,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:45:25,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:25,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:25,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:25,470 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting list_add_tailErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 21:45:25,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:25,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1017524743, now seen corresponding path program 1 times [2023-11-24 21:45:25,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:45:25,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336993579] [2023-11-24 21:45:25,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:25,472 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 [2023-11-24 21:45:25,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:45:25,474 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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) [2023-11-24 21:45:25,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:25,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:45:25,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:25,615 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:45:25,615 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:45:25,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336993579] [2023-11-24 21:45:25,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336993579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:25,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:25,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:45:25,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324363234] [2023-11-24 21:45:25,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:25,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:45:25,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:45:25,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:45:25,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:45:25,617 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-11-24 21:45:25,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:45:25,735 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2023-11-24 21:45:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:45:25,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 14 [2023-11-24 21:45:25,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:45:25,737 INFO L225 Difference]: With dead ends: 97 [2023-11-24 21:45:25,737 INFO L226 Difference]: Without dead ends: 97 [2023-11-24 21:45:25,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:45:25,738 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 10 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:45:25,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 105 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:45:25,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-24 21:45:25,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-11-24 21:45:25,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 58 states have (on average 1.7758620689655173) internal successors, (103), 83 states have internal predecessors, (103), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 21:45:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2023-11-24 21:45:25,744 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 14 [2023-11-24 21:45:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:45:25,744 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2023-11-24 21:45:25,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-11-24 21:45:25,745 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2023-11-24 21:45:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 21:45:25,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:45:25,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:25,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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)] Ended with exit code 0 [2023-11-24 21:45:25,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:25,947 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting list_add_tailErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 21:45:25,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:25,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1017524744, now seen corresponding path program 1 times [2023-11-24 21:45:25,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:45:25,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1728582124] [2023-11-24 21:45:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:25,948 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 [2023-11-24 21:45:25,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:45:25,949 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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) [2023-11-24 21:45:25,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:26,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-24 21:45:26,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:26,196 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:45:26,197 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:45:26,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1728582124] [2023-11-24 21:45:26,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1728582124] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:26,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:26,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 21:45:26,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688389422] [2023-11-24 21:45:26,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:26,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:45:26,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:45:26,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:45:26,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:45:26,199 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 7 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) [2023-11-24 21:45:26,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:45:26,732 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2023-11-24 21:45:26,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:45:26,733 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 7 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 [2023-11-24 21:45:26,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:45:26,734 INFO L225 Difference]: With dead ends: 103 [2023-11-24 21:45:26,734 INFO L226 Difference]: Without dead ends: 103 [2023-11-24 21:45:26,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:45:26,735 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 49 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:45:26,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 438 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:45:26,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-24 21:45:26,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2023-11-24 21:45:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 83 states have internal predecessors, (102), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 21:45:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2023-11-24 21:45:26,742 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 14 [2023-11-24 21:45:26,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:45:26,742 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2023-11-24 21:45:26,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 7 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) [2023-11-24 21:45:26,743 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2023-11-24 21:45:26,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 21:45:26,743 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:45:26,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:26,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:26,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:26,947 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)] === [2023-11-24 21:45:26,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:26,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1478496001, now seen corresponding path program 1 times [2023-11-24 21:45:26,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:45:26,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11047296] [2023-11-24 21:45:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:26,949 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 [2023-11-24 21:45:26,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:45:26,950 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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) [2023-11-24 21:45:26,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:27,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:45:27,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:27,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:45:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:27,177 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:45:27,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:45:27,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11047296] [2023-11-24 21:45:27,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11047296] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:27,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:27,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:45:27,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351089705] [2023-11-24 21:45:27,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:27,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:45:27,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:45:27,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:45:27,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:45:27,181 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-11-24 21:45:27,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:45:27,551 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2023-11-24 21:45:27,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:45:27,551 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 15 [2023-11-24 21:45:27,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:45:27,552 INFO L225 Difference]: With dead ends: 102 [2023-11-24 21:45:27,553 INFO L226 Difference]: Without dead ends: 102 [2023-11-24 21:45:27,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:45:27,554 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 34 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:45:27,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 222 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:45:27,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-24 21:45:27,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2023-11-24 21:45:27,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 82 states have internal predecessors, (97), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 21:45:27,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2023-11-24 21:45:27,560 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 15 [2023-11-24 21:45:27,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:45:27,560 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2023-11-24 21:45:27,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-11-24 21:45:27,561 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2023-11-24 21:45:27,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 21:45:27,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:45:27,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:27,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:27,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:27,774 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)] === [2023-11-24 21:45:27,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:27,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1478496002, now seen corresponding path program 1 times [2023-11-24 21:45:27,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:45:27,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155889739] [2023-11-24 21:45:27,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:27,775 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 [2023-11-24 21:45:27,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:45:27,776 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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) [2023-11-24 21:45:27,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:27,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:45:27,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:27,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:45:28,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:28,049 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:45:28,049 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:45:28,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155889739] [2023-11-24 21:45:28,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155889739] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:28,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:28,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:45:28,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538388128] [2023-11-24 21:45:28,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:28,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:45:28,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:45:28,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:45:28,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:45:28,052 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-11-24 21:45:28,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:45:28,516 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2023-11-24 21:45:28,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:45:28,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 15 [2023-11-24 21:45:28,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:45:28,519 INFO L225 Difference]: With dead ends: 100 [2023-11-24 21:45:28,519 INFO L226 Difference]: Without dead ends: 100 [2023-11-24 21:45:28,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:45:28,520 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 24 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:45:28,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 236 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:45:28,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-24 21:45:28,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2023-11-24 21:45:28,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 58 states have (on average 1.603448275862069) internal successors, (93), 82 states have internal predecessors, (93), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-11-24 21:45:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2023-11-24 21:45:28,528 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 15 [2023-11-24 21:45:28,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:45:28,528 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2023-11-24 21:45:28,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-11-24 21:45:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2023-11-24 21:45:28,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 21:45:28,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:45:28,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:28,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:28,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:28,733 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)] === [2023-11-24 21:45:28,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:28,734 INFO L85 PathProgramCache]: Analyzing trace with hash -799516636, now seen corresponding path program 1 times [2023-11-24 21:45:28,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:45:28,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144951937] [2023-11-24 21:45:28,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:28,735 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 [2023-11-24 21:45:28,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:45:28,736 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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) [2023-11-24 21:45:28,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:28,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-24 21:45:28,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:28,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:45:29,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-24 21:45:29,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-24 21:45:29,129 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-24 21:45:29,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-24 21:45:29,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-11-24 21:45:29,338 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:45:29,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2023-11-24 21:45:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:29,374 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:45:29,375 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:45:29,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144951937] [2023-11-24 21:45:29,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144951937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:29,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:29,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-24 21:45:29,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194033431] [2023-11-24 21:45:29,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:29,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 21:45:29,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:45:29,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 21:45:29,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:45:29,376 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 10 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) [2023-11-24 21:45:30,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:45:30,622 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2023-11-24 21:45:30,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:45:30,623 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.5) internal successors, (15), 10 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 [2023-11-24 21:45:30,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:45:30,626 INFO L225 Difference]: With dead ends: 119 [2023-11-24 21:45:30,626 INFO L226 Difference]: Without dead ends: 119 [2023-11-24 21:45:30,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-24 21:45:30,627 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 33 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:45:30,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 354 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 21:45:30,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-24 21:45:30,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2023-11-24 21:45:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 76 states have (on average 1.513157894736842) internal successors, (115), 100 states have internal predecessors, (115), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-24 21:45:30,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 133 transitions. [2023-11-24 21:45:30,635 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 133 transitions. Word has length 17 [2023-11-24 21:45:30,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:45:30,635 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 133 transitions. [2023-11-24 21:45:30,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.5) internal successors, (15), 10 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) [2023-11-24 21:45:30,636 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 133 transitions. [2023-11-24 21:45:30,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 21:45:30,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:45:30,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:30,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:30,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:30,842 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)] === [2023-11-24 21:45:30,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:30,842 INFO L85 PathProgramCache]: Analyzing trace with hash -799516635, now seen corresponding path program 1 times [2023-11-24 21:45:30,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:45:30,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096532135] [2023-11-24 21:45:30,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:30,843 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 [2023-11-24 21:45:30,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:45:30,844 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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) [2023-11-24 21:45:30,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:31,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-24 21:45:31,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:31,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:45:31,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:45:31,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:45:31,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:45:31,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-24 21:45:31,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-24 21:45:31,407 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-24 21:45:31,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-24 21:45:31,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:45:31,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-24 21:45:31,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-24 21:45:31,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-24 21:45:31,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-24 21:45:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:31,779 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:45:31,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:45:31,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096532135] [2023-11-24 21:45:31,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096532135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:45:31,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:45:31,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-24 21:45:31,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085165454] [2023-11-24 21:45:31,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:45:31,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 21:45:31,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:45:31,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 21:45:31,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:45:31,781 INFO L87 Difference]: Start difference. First operand 116 states and 133 transitions. Second operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 10 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) [2023-11-24 21:45:33,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:45:33,211 INFO L93 Difference]: Finished difference Result 116 states and 132 transitions. [2023-11-24 21:45:33,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:45:33,212 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.5) internal successors, (15), 10 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 [2023-11-24 21:45:33,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:45:33,213 INFO L225 Difference]: With dead ends: 116 [2023-11-24 21:45:33,214 INFO L226 Difference]: Without dead ends: 116 [2023-11-24 21:45:33,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-24 21:45:33,215 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 23 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-24 21:45:33,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 366 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-24 21:45:33,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-24 21:45:33,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2023-11-24 21:45:33,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 76 states have (on average 1.5) internal successors, (114), 100 states have internal predecessors, (114), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-24 21:45:33,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2023-11-24 21:45:33,221 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 17 [2023-11-24 21:45:33,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:45:33,222 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2023-11-24 21:45:33,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.5) internal successors, (15), 10 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) [2023-11-24 21:45:33,222 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2023-11-24 21:45:33,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 21:45:33,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:45:33,223 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] [2023-11-24 21:45:33,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:33,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:33,428 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)] === [2023-11-24 21:45:33,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:33,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1100203245, now seen corresponding path program 1 times [2023-11-24 21:45:33,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:45:33,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532176289] [2023-11-24 21:45:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:33,430 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 [2023-11-24 21:45:33,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:45:33,431 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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) [2023-11-24 21:45:33,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:33,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-24 21:45:33,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:33,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:45:33,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:45:33,743 WARN L876 $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 [2023-11-24 21:45:33,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:45:33,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:45:33,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:45:33,857 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-24 21:45:33,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-24 21:45:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:33,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:45:38,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:45:38,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532176289] [2023-11-24 21:45:38,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532176289] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:45:38,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1931395618] [2023-11-24 21:45:38,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:38,339 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-24 21:45:38,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/cvc4 [2023-11-24 21:45:38,352 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-24 21:45:38,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2023-11-24 21:45:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:38,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-24 21:45:38,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:38,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:45:38,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:45:39,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:45:39,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:45:39,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:45:39,458 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-24 21:45:39,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-24 21:45:39,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:39,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:45:40,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1931395618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:45:40,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:45:40,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12] total 13 [2023-11-24 21:45:40,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581527971] [2023-11-24 21:45:40,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:45:40,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-24 21:45:40,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:45:40,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-24 21:45:40,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=264, Unknown=2, NotChecked=32, Total=342 [2023-11-24 21:45:40,233 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand has 14 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 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) [2023-11-24 21:45:42,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:45:42,033 INFO L93 Difference]: Finished difference Result 143 states and 165 transitions. [2023-11-24 21:45:42,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:45:42,034 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 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 25 [2023-11-24 21:45:42,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:45:42,036 INFO L225 Difference]: With dead ends: 143 [2023-11-24 21:45:42,036 INFO L226 Difference]: Without dead ends: 143 [2023-11-24 21:45:42,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=80, Invalid=474, Unknown=2, NotChecked=44, Total=600 [2023-11-24 21:45:42,037 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 67 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:45:42,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 225 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 554 Invalid, 0 Unknown, 102 Unchecked, 1.4s Time] [2023-11-24 21:45:42,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-24 21:45:42,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 124. [2023-11-24 21:45:42,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 82 states have (on average 1.475609756097561) internal successors, (121), 105 states have internal predecessors, (121), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2023-11-24 21:45:42,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2023-11-24 21:45:42,044 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 25 [2023-11-24 21:45:42,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:45:42,044 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2023-11-24 21:45:42,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 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) [2023-11-24 21:45:42,045 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2023-11-24 21:45:42,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-24 21:45:42,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:45:42,046 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:45:42,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:42,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2023-11-24 21:45:42,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/cvc4 --incremental --print-success --lang smt [2023-11-24 21:45:42,451 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting list_add_tailErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 21:45:42,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:45:42,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1756385434, now seen corresponding path program 1 times [2023-11-24 21:45:42,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:45:42,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714951310] [2023-11-24 21:45:42,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:42,452 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 [2023-11-24 21:45:42,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:45:42,454 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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) [2023-11-24 21:45:42,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:45:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:42,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-24 21:45:42,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:42,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:45:42,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:45:42,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:45:43,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-24 21:45:43,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-24 21:45:43,142 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-11-24 21:45:43,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-11-24 21:45:43,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-24 21:45:43,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-24 21:45:43,344 INFO L378 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 15 treesize of output 7 [2023-11-24 21:45:43,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-24 21:45:44,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-24 21:45:44,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 73 [2023-11-24 21:45:44,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:45:44,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2023-11-24 21:45:44,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 18 [2023-11-24 21:45:44,853 INFO L349 Elim1Store]: treesize reduction 156, result has 25.4 percent of original size [2023-11-24 21:45:44,854 INFO L378 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 [2023-11-24 21:45:45,188 INFO L378 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 [2023-11-24 21:45:45,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2023-11-24 21:45:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:45,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:45:47,731 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-24 21:45:47,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714951310] [2023-11-24 21:45:47,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714951310] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:45:47,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1167710934] [2023-11-24 21:45:47,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:45:47,732 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-24 21:45:47,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/cvc4 [2023-11-24 21:45:47,733 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-24 21:45:47,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2023-11-24 21:45:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:45:48,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-24 21:45:48,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:45:48,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:45:48,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:45:48,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:45:48,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-24 21:45:48,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-24 21:45:48,744 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-11-24 21:45:48,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-11-24 21:45:48,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-24 21:45:48,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-24 21:45:48,904 INFO L378 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 15 treesize of output 7 [2023-11-24 21:45:48,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-24 21:45:49,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 73 [2023-11-24 21:45:49,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:45:49,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2023-11-24 21:45:49,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 18 [2023-11-24 21:45:49,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-24 21:45:49,758 INFO L349 Elim1Store]: treesize reduction 156, result has 25.4 percent of original size [2023-11-24 21:45:49,758 INFO L378 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 [2023-11-24 21:45:49,952 INFO L378 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 [2023-11-24 21:45:50,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2023-11-24 21:45:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:45:50,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:45:54,372 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_620 (Array (_ BitVec 32) (_ BitVec 32))) (|v_create_sub_list_insert_sub_~sub~0#1.base_29| (_ BitVec 32)) (v_ArrVal_735 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_29| v_ArrVal_735) (select (select (store |c_#memory_$Pointer$#1.base| |v_create_sub_list_insert_sub_~sub~0#1.base_29| v_ArrVal_620) |c_create_sub_list_~sub#1.base|) (bvadd (_ bv4 32) |c_create_sub_list_~sub#1.offset|))) (_ bv1 1))) (not (= (_ bv0 1) (select |c_#valid| |v_create_sub_list_insert_sub_~sub~0#1.base_29|))))) is different from false [2023-11-24 21:45:55,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1167710934] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:45:55,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:45:55,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2023-11-24 21:45:55,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120781442] [2023-11-24 21:45:55,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:45:55,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 21:45:55,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-24 21:45:55,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 21:45:55,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=618, Unknown=11, NotChecked=50, Total=756 [2023-11-24 21:45:55,347 INFO L87 Difference]: Start difference. First operand 124 states and 142 transitions. Second operand has 20 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:46:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:46:01,238 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2023-11-24 21:46:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 21:46:01,239 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-11-24 21:46:01,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:46:01,240 INFO L225 Difference]: With dead ends: 136 [2023-11-24 21:46:01,241 INFO L226 Difference]: Without dead ends: 136 [2023-11-24 21:46:01,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=196, Invalid=1432, Unknown=16, NotChecked=78, Total=1722 [2023-11-24 21:46:01,242 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 33 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:46:01,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 481 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-24 21:46:01,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-24 21:46:01,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2023-11-24 21:46:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 91 states have (on average 1.4395604395604396) internal successors, (131), 115 states have internal predecessors, (131), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 11 states have call successors, (12) [2023-11-24 21:46:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 154 transitions. [2023-11-24 21:46:01,249 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 154 transitions. Word has length 30 [2023-11-24 21:46:01,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:46:01,250 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 154 transitions. [2023-11-24 21:46:01,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:46:01,250 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 154 transitions. [2023-11-24 21:46:01,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-24 21:46:01,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:46:01,251 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:46:01,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:46:01,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2023-11-24 21:46:01,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/cvc4 --incremental --print-success --lang smt [2023-11-24 21:46:01,658 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting list_add_tailErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [create_sub_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, create_sub_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-24 21:46:01,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:46:01,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1756385433, now seen corresponding path program 1 times [2023-11-24 21:46:01,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-24 21:46:01,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486594279] [2023-11-24 21:46:01,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:46:01,659 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 [2023-11-24 21:46:01,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/mathsat [2023-11-24 21:46:01,660 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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) [2023-11-24 21:46:01,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb182d6a-f6fb-40f1-9161-57d8f67a32ea/bin/uautomizer-verify-NlZe1sFDwI/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 [2023-11-24 21:46:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:46:02,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-24 21:46:02,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:46:02,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-24 21:46:02,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:46:02,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:46:02,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-24 21:46:02,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-24 21:46:02,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:46:02,358 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-24 21:46:02,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-24 21:46:02,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-24 21:46:02,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2023-11-24 21:46:02,548 INFO L378 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 15 treesize of output 7 [2023-11-24 21:46:02,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-24 21:46:04,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 116 [2023-11-24 21:46:04,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:46:04,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 36 [2023-11-24 21:46:04,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 18 [2023-11-24 21:46:04,082 INFO L378 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 [2023-11-24 21:46:04,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:46:04,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 19 [2023-11-24 21:46:04,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2023-11-24 21:46:04,383 INFO L349 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2023-11-24 21:46:04,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2023-11-24 21:46:04,426 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-24 21:46:04,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-24 21:46:04,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 26 [2023-11-24 21:46:04,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11