./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:39:19,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:39:19,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:39:20,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:39:20,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:39:20,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:39:20,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:39:20,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:39:20,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:39:20,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:39:20,055 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:39:20,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:39:20,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:39:20,062 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:39:20,064 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:39:20,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:39:20,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:39:20,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:39:20,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:39:20,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:39:20,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:39:20,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:39:20,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:39:20,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:39:20,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:39:20,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:39:20,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:39:20,086 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:39:20,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:39:20,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:39:20,088 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:39:20,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:39:20,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:39:20,091 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:39:20,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:39:20,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:39:20,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:39:20,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:39:20,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:39:20,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:39:20,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:39:20,098 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:39:20,129 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:39:20,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:39:20,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:39:20,131 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:39:20,131 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:39:20,131 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:39:20,131 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:39:20,131 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:39:20,132 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:39:20,132 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:39:20,132 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:39:20,132 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:39:20,133 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:39:20,133 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:39:20,133 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:39:20,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:39:20,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:39:20,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:39:20,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:39:20,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:39:20,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:39:20,135 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:39:20,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:39:20,136 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:39:20,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:39:20,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:39:20,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:39:20,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:39:20,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:39:20,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:39:20,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:39:20,137 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:39:20,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:39:20,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:39:20,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:39:20,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:39:20,138 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d [2021-11-07 01:39:20,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:39:20,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:39:20,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:39:20,444 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:39:20,445 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:39:20,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-07 01:39:20,541 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/data/a9e53207f/6e8c9014542b4eb58eb05803930609d4/FLAGb1b450503 [2021-11-07 01:39:21,406 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:39:21,406 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-07 01:39:21,463 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/data/a9e53207f/6e8c9014542b4eb58eb05803930609d4/FLAGb1b450503 [2021-11-07 01:39:21,490 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/data/a9e53207f/6e8c9014542b4eb58eb05803930609d4 [2021-11-07 01:39:21,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:39:21,496 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:39:21,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:21,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:39:21,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:39:21,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:21" (1/1) ... [2021-11-07 01:39:21,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fae39aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:21, skipping insertion in model container [2021-11-07 01:39:21,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:21" (1/1) ... [2021-11-07 01:39:21,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:39:21,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:39:21,987 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-07 01:39:21,997 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-07 01:39:22,025 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 01:39:22,041 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 01:39:22,970 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:22,971 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:22,972 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:22,973 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:22,974 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:22,991 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:22,992 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:22,994 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:22,995 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:22,998 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:22,999 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:23,000 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:23,001 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:23,338 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 01:39:23,340 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 01:39:23,341 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 01:39:23,342 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 01:39:23,344 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 01:39:23,345 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 01:39:23,346 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 01:39:23,347 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 01:39:23,347 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 01:39:23,348 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 01:39:23,490 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 01:39:23,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:23,532 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:39:23,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@73b492f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:23, skipping insertion in model container [2021-11-07 01:39:23,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:23,534 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:39:23,536 INFO L168 Benchmark]: Toolchain (without parser) took 2038.93 ms. Allocated memory was 94.4 MB in the beginning and 127.9 MB in the end (delta: 33.6 MB). Free memory was 56.9 MB in the beginning and 70.8 MB in the end (delta: -13.9 MB). Peak memory consumption was 20.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:39:23,536 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 94.4 MB. Free memory is still 47.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:39:23,537 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2036.06 ms. Allocated memory was 94.4 MB in the beginning and 127.9 MB in the end (delta: 33.6 MB). Free memory was 56.7 MB in the beginning and 70.8 MB in the end (delta: -14.1 MB). Peak memory consumption was 20.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:39:23,539 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 94.4 MB. Free memory is still 47.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 2036.06 ms. Allocated memory was 94.4 MB in the beginning and 127.9 MB in the end (delta: 33.6 MB). Free memory was 56.7 MB in the beginning and 70.8 MB in the end (delta: -14.1 MB). Peak memory consumption was 20.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7037]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:39:25,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:39:25,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:39:25,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:39:25,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:39:25,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:39:25,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:39:25,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:39:25,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:39:25,824 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:39:25,825 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:39:25,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:39:25,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:39:25,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:39:25,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:39:25,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:39:25,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:39:25,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:39:25,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:39:25,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:39:25,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:39:25,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:39:25,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:39:25,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:39:25,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:39:25,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:39:25,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:39:25,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:39:25,851 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:39:25,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:39:25,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:39:25,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:39:25,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:39:25,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:39:25,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:39:25,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:39:25,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:39:25,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:39:25,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:39:25,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:39:25,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:39:25,862 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:39:25,911 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:39:25,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:39:25,913 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:39:25,913 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:39:25,913 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:39:25,913 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:39:25,914 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:39:25,914 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:39:25,914 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:39:25,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:39:25,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:39:25,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:39:25,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:39:25,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:39:25,918 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:39:25,918 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:39:25,918 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:39:25,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:39:25,919 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:39:25,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:39:25,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:39:25,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:39:25,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:39:25,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:39:25,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:39:25,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:39:25,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:39:25,921 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:39:25,921 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:25,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:39:25,922 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:39:25,922 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:39:25,922 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d [2021-11-07 01:39:26,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:39:26,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:39:26,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:39:26,400 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:39:26,400 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:39:26,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-07 01:39:26,476 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/data/3852feb8e/87ee127e86864eefa1540e0cb023ee63/FLAG3e96c3690 [2021-11-07 01:39:27,527 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:39:27,528 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-07 01:39:27,572 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/data/3852feb8e/87ee127e86864eefa1540e0cb023ee63/FLAG3e96c3690 [2021-11-07 01:39:27,881 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/data/3852feb8e/87ee127e86864eefa1540e0cb023ee63 [2021-11-07 01:39:27,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:39:27,885 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:39:27,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:27,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:39:27,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:39:27,890 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:27" (1/1) ... [2021-11-07 01:39:27,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2776ddd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:27, skipping insertion in model container [2021-11-07 01:39:27,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:39:27" (1/1) ... [2021-11-07 01:39:27,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:39:27,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:39:28,336 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-07 01:39:28,348 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-07 01:39:28,372 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 01:39:28,379 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 01:39:29,305 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:29,306 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:29,307 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:29,308 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:29,309 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:29,322 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:29,323 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:29,325 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:29,326 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:29,328 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:29,329 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:29,330 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:29,330 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:29,680 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 01:39:29,682 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 01:39:29,683 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 01:39:29,684 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 01:39:29,685 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 01:39:29,686 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 01:39:29,710 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 01:39:29,711 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 01:39:29,711 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 01:39:29,712 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 01:39:29,852 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 01:39:29,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:29,925 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:39:29,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:39:29,974 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-07 01:39:29,975 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-07 01:39:29,978 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 01:39:29,979 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 01:39:30,049 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,052 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,053 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,057 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,057 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,064 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,064 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,065 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,066 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,067 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,067 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,068 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,068 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,102 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 01:39:30,103 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 01:39:30,104 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 01:39:30,105 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 01:39:30,105 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 01:39:30,106 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 01:39:30,107 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 01:39:30,107 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 01:39:30,108 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 01:39:30,108 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 01:39:30,137 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 01:39:30,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:30,178 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:39:30,210 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-07 01:39:30,211 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-07 01:39:30,218 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-07 01:39:30,219 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-07 01:39:30,304 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,305 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,305 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,305 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,306 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,311 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,312 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,313 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,316 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,317 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,317 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,318 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,318 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-07 01:39:30,357 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-07 01:39:30,359 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-07 01:39:30,360 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-07 01:39:30,361 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-07 01:39:30,362 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-07 01:39:30,362 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-07 01:39:30,363 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-07 01:39:30,364 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-07 01:39:30,364 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-07 01:39:30,365 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-07 01:39:30,394 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-07 01:39:30,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:39:30,641 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:39:30,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:30 WrapperNode [2021-11-07 01:39:30,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:39:30,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:39:30,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:39:30,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:39:30,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:30" (1/1) ... [2021-11-07 01:39:30,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:30" (1/1) ... [2021-11-07 01:39:30,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:39:30,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:39:30,866 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:39:30,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:39:30,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:30" (1/1) ... [2021-11-07 01:39:30,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:30" (1/1) ... [2021-11-07 01:39:30,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:30" (1/1) ... [2021-11-07 01:39:30,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:30" (1/1) ... [2021-11-07 01:39:30,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:30" (1/1) ... [2021-11-07 01:39:30,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:30" (1/1) ... [2021-11-07 01:39:30,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:30" (1/1) ... [2021-11-07 01:39:30,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:39:30,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:39:30,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:39:30,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:39:30,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:30" (1/1) ... [2021-11-07 01:39:30,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:39:31,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:39:31,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:39:31,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:39:31,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:39:31,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:39:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:39:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:39:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:39:31,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:39:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:39:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:39:31,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:39:33,375 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:39:33,375 INFO L299 CfgBuilder]: Removed 138 assume(true) statements. [2021-11-07 01:39:33,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:33 BoogieIcfgContainer [2021-11-07 01:39:33,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:39:33,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:39:33,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:39:33,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:39:33,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:39:27" (1/3) ... [2021-11-07 01:39:33,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b4265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:33, skipping insertion in model container [2021-11-07 01:39:33,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:39:30" (2/3) ... [2021-11-07 01:39:33,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b4265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:39:33, skipping insertion in model container [2021-11-07 01:39:33,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:39:33" (3/3) ... [2021-11-07 01:39:33,422 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_swap_contents_harness.i [2021-11-07 01:39:33,443 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:39:33,444 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2021-11-07 01:39:33,518 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:39:33,524 INFO L339 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:39:33,525 INFO L340 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2021-11-07 01:39:33,561 INFO L276 IsEmpty]: Start isEmpty. Operand has 267 states, 252 states have (on average 1.5674603174603174) internal successors, (395), 266 states have internal predecessors, (395), 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) [2021-11-07 01:39:33,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:39:33,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:33,576 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:33,576 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:39:33,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:33,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2109692067, now seen corresponding path program 1 times [2021-11-07 01:39:33,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:33,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538611031] [2021-11-07 01:39:33,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:33,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:33,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:33,620 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:33,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:39:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:34,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:39:34,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:34,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:34,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:34,443 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:34,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538611031] [2021-11-07 01:39:34,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538611031] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:34,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:34,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:39:34,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249296085] [2021-11-07 01:39:34,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:39:34,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:34,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:39:34,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:39:34,473 INFO L87 Difference]: Start difference. First operand has 267 states, 252 states have (on average 1.5674603174603174) internal successors, (395), 266 states have internal predecessors, (395), 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) Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 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) [2021-11-07 01:39:34,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:34,534 INFO L93 Difference]: Finished difference Result 530 states and 785 transitions. [2021-11-07 01:39:34,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:39:34,536 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 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 53 [2021-11-07 01:39:34,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:34,560 INFO L225 Difference]: With dead ends: 530 [2021-11-07 01:39:34,560 INFO L226 Difference]: Without dead ends: 260 [2021-11-07 01:39:34,568 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:39:34,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-07 01:39:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2021-11-07 01:39:34,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 246 states have (on average 1.4308943089430894) internal successors, (352), 259 states have internal predecessors, (352), 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) [2021-11-07 01:39:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 352 transitions. [2021-11-07 01:39:34,646 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 352 transitions. Word has length 53 [2021-11-07 01:39:34,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:34,647 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 352 transitions. [2021-11-07 01:39:34,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 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) [2021-11-07 01:39:34,648 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 352 transitions. [2021-11-07 01:39:34,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:39:34,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:34,652 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:34,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:34,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:34,853 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:39:34,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:34,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1639619295, now seen corresponding path program 1 times [2021-11-07 01:39:34,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:34,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943143039] [2021-11-07 01:39:34,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:34,856 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:34,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:34,857 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:34,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:39:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:35,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:39:35,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:35,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:35,509 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:35,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943143039] [2021-11-07 01:39:35,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943143039] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:35,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:35,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:39:35,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489977368] [2021-11-07 01:39:35,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:39:35,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:35,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:39:35,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:39:35,515 INFO L87 Difference]: Start difference. First operand 260 states and 352 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-07 01:39:35,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:35,988 INFO L93 Difference]: Finished difference Result 563 states and 782 transitions. [2021-11-07 01:39:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:39:35,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2021-11-07 01:39:35,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:35,995 INFO L225 Difference]: With dead ends: 563 [2021-11-07 01:39:35,997 INFO L226 Difference]: Without dead ends: 324 [2021-11-07 01:39:35,998 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:39:35,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-07 01:39:36,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 276. [2021-11-07 01:39:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 262 states have (on average 1.4045801526717556) internal successors, (368), 275 states have internal predecessors, (368), 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) [2021-11-07 01:39:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 368 transitions. [2021-11-07 01:39:36,011 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 368 transitions. Word has length 53 [2021-11-07 01:39:36,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:36,011 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 368 transitions. [2021-11-07 01:39:36,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-07 01:39:36,012 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 368 transitions. [2021-11-07 01:39:36,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:39:36,014 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:36,014 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:36,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 01:39:36,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:36,229 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:39:36,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:36,230 INFO L85 PathProgramCache]: Analyzing trace with hash 795613793, now seen corresponding path program 1 times [2021-11-07 01:39:36,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:36,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302948817] [2021-11-07 01:39:36,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:36,232 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:36,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:36,233 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:36,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:39:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:36,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:39:36,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:36,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:36,970 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:36,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302948817] [2021-11-07 01:39:36,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302948817] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:36,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:36,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:39:36,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745603344] [2021-11-07 01:39:36,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:39:36,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:36,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:39:36,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:39:36,973 INFO L87 Difference]: Start difference. First operand 276 states and 368 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2021-11-07 01:39:37,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:37,634 INFO L93 Difference]: Finished difference Result 583 states and 801 transitions. [2021-11-07 01:39:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:39:37,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 53 [2021-11-07 01:39:37,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:37,640 INFO L225 Difference]: With dead ends: 583 [2021-11-07 01:39:37,640 INFO L226 Difference]: Without dead ends: 332 [2021-11-07 01:39:37,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:39:37,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-07 01:39:37,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 300. [2021-11-07 01:39:37,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 286 states have (on average 1.3706293706293706) internal successors, (392), 299 states have internal predecessors, (392), 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) [2021-11-07 01:39:37,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 392 transitions. [2021-11-07 01:39:37,661 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 392 transitions. Word has length 53 [2021-11-07 01:39:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:37,662 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 392 transitions. [2021-11-07 01:39:37,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2021-11-07 01:39:37,672 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 392 transitions. [2021-11-07 01:39:37,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 01:39:37,678 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:37,678 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:37,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:37,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:37,889 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:39:37,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:37,890 INFO L85 PathProgramCache]: Analyzing trace with hash 725074277, now seen corresponding path program 1 times [2021-11-07 01:39:37,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:37,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1334022237] [2021-11-07 01:39:37,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:37,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:37,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:37,895 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:37,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:39:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:38,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:39:38,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:38,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:38,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:38,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:38,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1334022237] [2021-11-07 01:39:38,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1334022237] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:38,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:38,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:39:38,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448775640] [2021-11-07 01:39:38,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:39:38,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:38,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:39:38,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:39:38,672 INFO L87 Difference]: Start difference. First operand 300 states and 392 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-07 01:39:38,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:38,969 INFO L93 Difference]: Finished difference Result 642 states and 814 transitions. [2021-11-07 01:39:38,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:39:38,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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 53 [2021-11-07 01:39:38,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:38,977 INFO L225 Difference]: With dead ends: 642 [2021-11-07 01:39:38,977 INFO L226 Difference]: Without dead ends: 370 [2021-11-07 01:39:38,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:39:38,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-07 01:39:38,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 290. [2021-11-07 01:39:38,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 276 states have (on average 1.355072463768116) internal successors, (374), 289 states have internal predecessors, (374), 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) [2021-11-07 01:39:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 374 transitions. [2021-11-07 01:39:38,989 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 374 transitions. Word has length 53 [2021-11-07 01:39:38,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:38,990 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 374 transitions. [2021-11-07 01:39:38,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2021-11-07 01:39:38,990 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 374 transitions. [2021-11-07 01:39:38,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:39:38,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:38,992 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:39,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:39,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:39,214 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:39:39,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:39,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1019459681, now seen corresponding path program 1 times [2021-11-07 01:39:39,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:39,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [390626689] [2021-11-07 01:39:39,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:39,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:39,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:39,218 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:39,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:39:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:39,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:39:39,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:39,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:40,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:40,150 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:40,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [390626689] [2021-11-07 01:39:40,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [390626689] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:40,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:40,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:39:40,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617215267] [2021-11-07 01:39:40,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:39:40,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:40,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:39:40,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:39:40,151 INFO L87 Difference]: Start difference. First operand 290 states and 374 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2021-11-07 01:39:40,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:40,590 INFO L93 Difference]: Finished difference Result 600 states and 764 transitions. [2021-11-07 01:39:40,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:39:40,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 57 [2021-11-07 01:39:40,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:40,595 INFO L225 Difference]: With dead ends: 600 [2021-11-07 01:39:40,595 INFO L226 Difference]: Without dead ends: 344 [2021-11-07 01:39:40,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:39:40,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-07 01:39:40,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 290. [2021-11-07 01:39:40,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 276 states have (on average 1.3478260869565217) internal successors, (372), 289 states have internal predecessors, (372), 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) [2021-11-07 01:39:40,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 372 transitions. [2021-11-07 01:39:40,606 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 372 transitions. Word has length 57 [2021-11-07 01:39:40,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:40,606 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 372 transitions. [2021-11-07 01:39:40,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2021-11-07 01:39:40,607 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 372 transitions. [2021-11-07 01:39:40,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:39:40,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:40,608 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:40,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:40,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:40,824 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:39:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:40,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1178542337, now seen corresponding path program 1 times [2021-11-07 01:39:40,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:40,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544573352] [2021-11-07 01:39:40,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:40,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:40,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:40,827 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:40,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:39:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:41,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:39:41,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:41,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:41,701 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:41,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544573352] [2021-11-07 01:39:41,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1544573352] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:41,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:41,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-07 01:39:41,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244437105] [2021-11-07 01:39:41,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:39:41,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:41,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:39:41,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:39:41,703 INFO L87 Difference]: Start difference. First operand 290 states and 372 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:42,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:42,301 INFO L93 Difference]: Finished difference Result 686 states and 863 transitions. [2021-11-07 01:39:42,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:39:42,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:39:42,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:42,305 INFO L225 Difference]: With dead ends: 686 [2021-11-07 01:39:42,305 INFO L226 Difference]: Without dead ends: 429 [2021-11-07 01:39:42,306 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:39:42,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-07 01:39:42,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 292. [2021-11-07 01:39:42,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 278 states have (on average 1.3453237410071943) internal successors, (374), 291 states have internal predecessors, (374), 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) [2021-11-07 01:39:42,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 374 transitions. [2021-11-07 01:39:42,318 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 374 transitions. Word has length 59 [2021-11-07 01:39:42,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:42,319 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 374 transitions. [2021-11-07 01:39:42,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:42,319 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 374 transitions. [2021-11-07 01:39:42,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:39:42,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:42,320 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:42,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:42,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:42,534 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:39:42,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:42,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1951801708, now seen corresponding path program 1 times [2021-11-07 01:39:42,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:42,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488007963] [2021-11-07 01:39:42,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:42,535 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:42,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:42,536 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:42,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:39:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:43,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:39:43,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:43,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:43,475 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:43,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488007963] [2021-11-07 01:39:43,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488007963] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:43,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:43,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 3] imperfect sequences [] total 7 [2021-11-07 01:39:43,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036384513] [2021-11-07 01:39:43,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:39:43,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:43,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:39:43,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:39:43,477 INFO L87 Difference]: Start difference. First operand 292 states and 374 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 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) [2021-11-07 01:39:44,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:44,810 INFO L93 Difference]: Finished difference Result 1033 states and 1297 transitions. [2021-11-07 01:39:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:39:44,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 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 60 [2021-11-07 01:39:44,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:44,816 INFO L225 Difference]: With dead ends: 1033 [2021-11-07 01:39:44,816 INFO L226 Difference]: Without dead ends: 775 [2021-11-07 01:39:44,817 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:39:44,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-11-07 01:39:44,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 306. [2021-11-07 01:39:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 292 states have (on average 1.3493150684931507) internal successors, (394), 305 states have internal predecessors, (394), 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) [2021-11-07 01:39:44,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 394 transitions. [2021-11-07 01:39:44,836 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 394 transitions. Word has length 60 [2021-11-07 01:39:44,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:44,836 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 394 transitions. [2021-11-07 01:39:44,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 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) [2021-11-07 01:39:44,836 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 394 transitions. [2021-11-07 01:39:44,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:39:44,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:44,837 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:39:44,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:45,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:45,057 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:39:45,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:45,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1906919633, now seen corresponding path program 1 times [2021-11-07 01:39:45,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:45,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693385815] [2021-11-07 01:39:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:45,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:45,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:45,059 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:45,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:39:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:45,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:39:45,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:46,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 27 [2021-11-07 01:39:46,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 19 [2021-11-07 01:39:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:46,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:46,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:46,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693385815] [2021-11-07 01:39:46,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693385815] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:46,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:39:46,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 12 [2021-11-07 01:39:46,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106771375] [2021-11-07 01:39:46,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:39:46,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:46,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:39:46,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:39:46,595 INFO L87 Difference]: Start difference. First operand 306 states and 394 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:13,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:13,115 INFO L93 Difference]: Finished difference Result 2017 states and 2424 transitions. [2021-11-07 01:40:13,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 01:40:13,117 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:40:13,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:13,126 INFO L225 Difference]: With dead ends: 2017 [2021-11-07 01:40:13,126 INFO L226 Difference]: Without dead ends: 1738 [2021-11-07 01:40:13,128 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=454, Invalid=1438, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 01:40:13,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2021-11-07 01:40:13,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 330. [2021-11-07 01:40:13,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 316 states have (on average 1.3481012658227849) internal successors, (426), 329 states have internal predecessors, (426), 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) [2021-11-07 01:40:13,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 426 transitions. [2021-11-07 01:40:13,158 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 426 transitions. Word has length 65 [2021-11-07 01:40:13,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:13,159 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 426 transitions. [2021-11-07 01:40:13,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 12 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:40:13,159 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 426 transitions. [2021-11-07 01:40:13,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:40:13,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:13,160 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:13,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:13,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:13,380 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:40:13,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:13,380 INFO L85 PathProgramCache]: Analyzing trace with hash -877560335, now seen corresponding path program 1 times [2021-11-07 01:40:13,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:13,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407765380] [2021-11-07 01:40:13,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:13,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:13,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:13,383 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:13,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:40:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:13,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:40:13,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:14,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:14,321 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:14,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407765380] [2021-11-07 01:40:14,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407765380] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:14,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:14,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:40:14,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495986076] [2021-11-07 01:40:14,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:40:14,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:14,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:40:14,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:40:14,323 INFO L87 Difference]: Start difference. First operand 330 states and 426 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2021-11-07 01:40:14,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:14,865 INFO L93 Difference]: Finished difference Result 855 states and 1065 transitions. [2021-11-07 01:40:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:40:14,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 65 [2021-11-07 01:40:14,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:14,869 INFO L225 Difference]: With dead ends: 855 [2021-11-07 01:40:14,870 INFO L226 Difference]: Without dead ends: 561 [2021-11-07 01:40:14,871 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:40:14,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-07 01:40:14,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 330. [2021-11-07 01:40:14,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 316 states have (on average 1.3386075949367089) internal successors, (423), 329 states have internal predecessors, (423), 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) [2021-11-07 01:40:14,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 423 transitions. [2021-11-07 01:40:14,897 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 423 transitions. Word has length 65 [2021-11-07 01:40:14,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:14,897 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 423 transitions. [2021-11-07 01:40:14,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2021-11-07 01:40:14,898 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 423 transitions. [2021-11-07 01:40:14,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:40:14,899 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:14,899 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:14,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:15,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:15,121 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:40:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:15,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1143795921, now seen corresponding path program 1 times [2021-11-07 01:40:15,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:15,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130011835] [2021-11-07 01:40:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:15,123 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:15,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:15,123 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:15,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:40:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:15,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:40:15,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:16,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 24 [2021-11-07 01:40:16,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-07 01:40:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:16,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:16,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:16,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130011835] [2021-11-07 01:40:16,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130011835] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:16,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2023256372] [2021-11-07 01:40:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:16,711 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:16,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:40:16,717 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:40:16,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-07 01:40:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:17,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:40:17,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:40:17,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:40:17,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2023256372] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:17,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:40:17,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [8, 8] total 12 [2021-11-07 01:40:17,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983080671] [2021-11-07 01:40:17,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:40:17,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:17,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:40:17,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:40:17,760 INFO L87 Difference]: Start difference. First operand 330 states and 423 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-11-07 01:40:18,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:18,062 INFO L93 Difference]: Finished difference Result 705 states and 894 transitions. [2021-11-07 01:40:18,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:40:18,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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 69 [2021-11-07 01:40:18,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:18,065 INFO L225 Difference]: With dead ends: 705 [2021-11-07 01:40:18,066 INFO L226 Difference]: Without dead ends: 390 [2021-11-07 01:40:18,066 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:40:18,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-11-07 01:40:18,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 342. [2021-11-07 01:40:18,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 328 states have (on average 1.3201219512195121) internal successors, (433), 341 states have internal predecessors, (433), 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) [2021-11-07 01:40:18,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 433 transitions. [2021-11-07 01:40:18,087 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 433 transitions. Word has length 69 [2021-11-07 01:40:18,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:18,088 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 433 transitions. [2021-11-07 01:40:18,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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) [2021-11-07 01:40:18,088 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 433 transitions. [2021-11-07 01:40:18,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:40:18,089 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:18,089 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:18,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:18,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:18,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:18,514 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:40:18,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:18,515 INFO L85 PathProgramCache]: Analyzing trace with hash 869036307, now seen corresponding path program 1 times [2021-11-07 01:40:18,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:18,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872322960] [2021-11-07 01:40:18,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:18,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:18,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:18,517 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:18,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:40:19,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:19,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 01:40:19,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:19,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 24 [2021-11-07 01:40:19,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-07 01:40:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:19,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:40:20,128 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:20,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872322960] [2021-11-07 01:40:20,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872322960] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:20,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1678236752] [2021-11-07 01:40:20,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:20,129 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:20,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:40:20,130 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:40:20,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 01:40:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:20,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:40:20,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:40:21,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 01:40:21,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1678236752] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:21,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:40:21,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [8, 8] total 14 [2021-11-07 01:40:21,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994114820] [2021-11-07 01:40:21,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:40:21,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:21,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:40:21,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:40:21,226 INFO L87 Difference]: Start difference. First operand 342 states and 433 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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) [2021-11-07 01:40:21,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:21,825 INFO L93 Difference]: Finished difference Result 1057 states and 1285 transitions. [2021-11-07 01:40:21,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:40:21,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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 69 [2021-11-07 01:40:21,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:21,838 INFO L225 Difference]: With dead ends: 1057 [2021-11-07 01:40:21,838 INFO L226 Difference]: Without dead ends: 749 [2021-11-07 01:40:21,839 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:40:21,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-11-07 01:40:21,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 342. [2021-11-07 01:40:21,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 328 states have (on average 1.3109756097560976) internal successors, (430), 341 states have internal predecessors, (430), 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) [2021-11-07 01:40:21,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 430 transitions. [2021-11-07 01:40:21,862 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 430 transitions. Word has length 69 [2021-11-07 01:40:21,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:21,863 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 430 transitions. [2021-11-07 01:40:21,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 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) [2021-11-07 01:40:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 430 transitions. [2021-11-07 01:40:21,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:40:21,864 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:21,864 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:21,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:40:22,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 01:40:22,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:22,269 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:40:22,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:22,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1498389026, now seen corresponding path program 1 times [2021-11-07 01:40:22,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:22,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206183029] [2021-11-07 01:40:22,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:22,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:22,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:22,271 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:22,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:40:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:22,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 01:40:22,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:40:23,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:40:23,589 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:23,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206183029] [2021-11-07 01:40:23,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206183029] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:40:23,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:40:23,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-07 01:40:23,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329073564] [2021-11-07 01:40:23,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:40:23,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:23,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:40:23,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:40:23,591 INFO L87 Difference]: Start difference. First operand 342 states and 430 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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) [2021-11-07 01:40:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:40:25,748 INFO L93 Difference]: Finished difference Result 876 states and 1084 transitions. [2021-11-07 01:40:25,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:40:25,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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 79 [2021-11-07 01:40:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:40:25,752 INFO L225 Difference]: With dead ends: 876 [2021-11-07 01:40:25,752 INFO L226 Difference]: Without dead ends: 591 [2021-11-07 01:40:25,753 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:40:25,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-07 01:40:25,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 342. [2021-11-07 01:40:25,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 328 states have (on average 1.2896341463414633) internal successors, (423), 341 states have internal predecessors, (423), 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) [2021-11-07 01:40:25,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 423 transitions. [2021-11-07 01:40:25,776 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 423 transitions. Word has length 79 [2021-11-07 01:40:25,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:40:25,777 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 423 transitions. [2021-11-07 01:40:25,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 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) [2021-11-07 01:40:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 423 transitions. [2021-11-07 01:40:25,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:40:25,778 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:40:25,778 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:40:25,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:40:25,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:40:26,000 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:40:26,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:40:26,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1475756772, now seen corresponding path program 1 times [2021-11-07 01:40:26,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:40:26,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718672301] [2021-11-07 01:40:26,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:26,002 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:40:26,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:40:26,003 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:40:26,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:40:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:26,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 01:40:26,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:40:27,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:28,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:28,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 39 [2021-11-07 01:40:28,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:28,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 38 [2021-11-07 01:40:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:40:28,830 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:40:28,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718672301] [2021-11-07 01:40:28,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718672301] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:28,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1991473516] [2021-11-07 01:40:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:28,831 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:40:28,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:40:28,832 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:40:28,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:40:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:30,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 01:40:30,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:31,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-07 01:40:31,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-07 01:40:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:40:31,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:32,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:32,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 39 [2021-11-07 01:40:32,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:32,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 38 [2021-11-07 01:40:33,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:40:33,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1991473516] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:33,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211731476] [2021-11-07 01:40:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:40:33,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:40:33,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:40:33,286 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:40:33,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 01:40:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:40:34,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 01:40:34,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:40:35,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-07 01:40:35,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-07 01:40:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:40:35,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:40:35,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:35,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 39 [2021-11-07 01:40:35,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:40:35,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 38 [2021-11-07 01:40:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 01:40:36,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211731476] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:40:36,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:40:36,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9, 8, 9, 8] total 33 [2021-11-07 01:40:36,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340087444] [2021-11-07 01:40:36,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-07 01:40:36,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:40:36,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-07 01:40:36,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 01:40:36,098 INFO L87 Difference]: Start difference. First operand 342 states and 423 transitions. Second operand has 33 states, 33 states have (on average 7.878787878787879) internal successors, (260), 33 states have internal predecessors, (260), 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) [2021-11-07 01:41:43,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:43,527 INFO L93 Difference]: Finished difference Result 7053 states and 8235 transitions. [2021-11-07 01:41:43,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-11-07 01:41:43,529 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 7.878787878787879) internal successors, (260), 33 states have internal predecessors, (260), 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 79 [2021-11-07 01:41:43,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:43,554 INFO L225 Difference]: With dead ends: 7053 [2021-11-07 01:41:43,555 INFO L226 Difference]: Without dead ends: 6830 [2021-11-07 01:41:43,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15500 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=4675, Invalid=37555, Unknown=0, NotChecked=0, Total=42230 [2021-11-07 01:41:43,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6830 states. [2021-11-07 01:41:43,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6830 to 455. [2021-11-07 01:41:43,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 441 states have (on average 1.2675736961451247) internal successors, (559), 454 states have internal predecessors, (559), 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) [2021-11-07 01:41:43,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 559 transitions. [2021-11-07 01:41:43,669 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 559 transitions. Word has length 79 [2021-11-07 01:41:43,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:43,669 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 559 transitions. [2021-11-07 01:41:43,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.878787878787879) internal successors, (260), 33 states have internal predecessors, (260), 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) [2021-11-07 01:41:43,670 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 559 transitions. [2021-11-07 01:41:43,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:41:43,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:43,671 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:43,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:43,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-07 01:41:44,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:44,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:44,279 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:41:44,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:44,280 INFO L85 PathProgramCache]: Analyzing trace with hash 378673426, now seen corresponding path program 1 times [2021-11-07 01:41:44,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:44,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873735693] [2021-11-07 01:41:44,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:44,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:44,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:44,282 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:44,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:41:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:45,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 01:41:45,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:45,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 29 [2021-11-07 01:41:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:41:45,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:46,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 26 [2021-11-07 01:41:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:41:46,490 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:46,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873735693] [2021-11-07 01:41:46,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873735693] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:46,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:46,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-07 01:41:46,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561688493] [2021-11-07 01:41:46,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:41:46,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:46,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:41:46,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:41:46,495 INFO L87 Difference]: Start difference. First operand 455 states and 559 transitions. Second operand has 12 states, 12 states have (on average 11.916666666666666) internal successors, (143), 12 states have internal predecessors, (143), 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) [2021-11-07 01:41:50,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:50,879 INFO L93 Difference]: Finished difference Result 896 states and 1105 transitions. [2021-11-07 01:41:50,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:41:50,881 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 11.916666666666666) internal successors, (143), 12 states have internal predecessors, (143), 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 79 [2021-11-07 01:41:50,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:50,883 INFO L225 Difference]: With dead ends: 896 [2021-11-07 01:41:50,883 INFO L226 Difference]: Without dead ends: 642 [2021-11-07 01:41:50,884 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-11-07 01:41:50,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-11-07 01:41:50,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 455. [2021-11-07 01:41:50,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 441 states have (on average 1.2630385487528344) internal successors, (557), 454 states have internal predecessors, (557), 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) [2021-11-07 01:41:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 557 transitions. [2021-11-07 01:41:50,949 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 557 transitions. Word has length 79 [2021-11-07 01:41:50,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:50,950 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 557 transitions. [2021-11-07 01:41:50,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.916666666666666) internal successors, (143), 12 states have internal predecessors, (143), 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) [2021-11-07 01:41:50,950 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 557 transitions. [2021-11-07 01:41:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:41:50,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:50,952 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:50,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:51,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:51,174 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:41:51,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:51,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2078239348, now seen corresponding path program 1 times [2021-11-07 01:41:51,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:51,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1934348734] [2021-11-07 01:41:51,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:51,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:51,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:51,176 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:51,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:41:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:52,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:41:52,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:52,494 INFO L354 Elim1Store]: treesize reduction 157, result has 15.1 percent of original size [2021-11-07 01:41:52,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 28 treesize of output 37 [2021-11-07 01:41:52,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:52,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:52,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:52,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:52,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:52,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:41:52,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2021-11-07 01:41:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:41:53,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:41:53,446 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:41:53,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1934348734] [2021-11-07 01:41:53,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1934348734] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:41:53,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:41:53,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:41:53,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499208563] [2021-11-07 01:41:53,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:41:53,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:41:53,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:41:53,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:41:53,448 INFO L87 Difference]: Start difference. First operand 455 states and 557 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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) [2021-11-07 01:41:57,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:41:57,286 INFO L93 Difference]: Finished difference Result 704 states and 867 transitions. [2021-11-07 01:41:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:41:57,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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 79 [2021-11-07 01:41:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:41:57,290 INFO L225 Difference]: With dead ends: 704 [2021-11-07 01:41:57,290 INFO L226 Difference]: Without dead ends: 460 [2021-11-07 01:41:57,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:41:57,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-07 01:41:57,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 455. [2021-11-07 01:41:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 441 states have (on average 1.256235827664399) internal successors, (554), 454 states have internal predecessors, (554), 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) [2021-11-07 01:41:57,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 554 transitions. [2021-11-07 01:41:57,340 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 554 transitions. Word has length 79 [2021-11-07 01:41:57,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:41:57,340 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 554 transitions. [2021-11-07 01:41:57,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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) [2021-11-07 01:41:57,341 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 554 transitions. [2021-11-07 01:41:57,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:41:57,342 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:41:57,342 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:41:57,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:41:57,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:41:57,566 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:41:57,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:41:57,567 INFO L85 PathProgramCache]: Analyzing trace with hash -2076392306, now seen corresponding path program 1 times [2021-11-07 01:41:57,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:41:57,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398407867] [2021-11-07 01:41:57,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:41:57,568 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:41:57,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:41:57,570 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:41:57,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:41:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:41:58,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 01:41:58,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:41:59,321 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-11-07 01:41:59,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 35 [2021-11-07 01:41:59,619 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 01:41:59,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 38 [2021-11-07 01:41:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:41:59,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:41:59,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 26 [2021-11-07 01:42:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:42:00,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:00,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398407867] [2021-11-07 01:42:00,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398407867] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:00,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:00,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2021-11-07 01:42:00,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206393346] [2021-11-07 01:42:00,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:42:00,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:00,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:42:00,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:42:00,150 INFO L87 Difference]: Start difference. First operand 455 states and 554 transitions. Second operand has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 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) [2021-11-07 01:42:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:07,272 INFO L93 Difference]: Finished difference Result 882 states and 1085 transitions. [2021-11-07 01:42:07,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:42:07,274 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 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 79 [2021-11-07 01:42:07,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:07,276 INFO L225 Difference]: With dead ends: 882 [2021-11-07 01:42:07,277 INFO L226 Difference]: Without dead ends: 636 [2021-11-07 01:42:07,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:42:07,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-11-07 01:42:07,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 455. [2021-11-07 01:42:07,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 441 states have (on average 1.251700680272109) internal successors, (552), 454 states have internal predecessors, (552), 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) [2021-11-07 01:42:07,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 552 transitions. [2021-11-07 01:42:07,346 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 552 transitions. Word has length 79 [2021-11-07 01:42:07,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:07,347 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 552 transitions. [2021-11-07 01:42:07,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 9 states have internal predecessors, (83), 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) [2021-11-07 01:42:07,347 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 552 transitions. [2021-11-07 01:42:07,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:42:07,348 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:07,348 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:07,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:07,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:07,574 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:42:07,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:07,574 INFO L85 PathProgramCache]: Analyzing trace with hash -301384944, now seen corresponding path program 1 times [2021-11-07 01:42:07,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:07,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [687095517] [2021-11-07 01:42:07,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:07,575 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:07,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:07,576 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:07,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:42:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:08,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:42:08,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:09,250 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-11-07 01:42:09,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 26 treesize of output 35 [2021-11-07 01:42:09,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:09,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:09,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:09,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:09,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:09,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:09,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2021-11-07 01:42:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:42:09,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:09,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 25 [2021-11-07 01:42:09,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 27 [2021-11-07 01:42:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:42:09,804 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:09,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [687095517] [2021-11-07 01:42:09,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [687095517] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:09,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:09,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-07 01:42:09,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466093256] [2021-11-07 01:42:09,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:42:09,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:09,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:42:09,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:42:09,806 INFO L87 Difference]: Start difference. First operand 455 states and 552 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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) [2021-11-07 01:42:12,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:12,969 INFO L93 Difference]: Finished difference Result 711 states and 868 transitions. [2021-11-07 01:42:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:42:12,971 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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 79 [2021-11-07 01:42:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:12,975 INFO L225 Difference]: With dead ends: 711 [2021-11-07 01:42:12,975 INFO L226 Difference]: Without dead ends: 461 [2021-11-07 01:42:12,976 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:42:12,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-07 01:42:13,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 455. [2021-11-07 01:42:13,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 441 states have (on average 1.2448979591836735) internal successors, (549), 454 states have internal predecessors, (549), 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) [2021-11-07 01:42:13,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 549 transitions. [2021-11-07 01:42:13,038 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 549 transitions. Word has length 79 [2021-11-07 01:42:13,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:13,039 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 549 transitions. [2021-11-07 01:42:13,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 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) [2021-11-07 01:42:13,039 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 549 transitions. [2021-11-07 01:42:13,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:42:13,040 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:13,041 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:13,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-07 01:42:13,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:13,266 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:42:13,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:13,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1079738004, now seen corresponding path program 1 times [2021-11-07 01:42:13,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:13,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128638662] [2021-11-07 01:42:13,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:13,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:13,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:13,268 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:13,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:42:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:14,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 01:42:14,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:14,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:42:14,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:42:15,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:15,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128638662] [2021-11-07 01:42:15,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128638662] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:15,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:15,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-07 01:42:15,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281373602] [2021-11-07 01:42:15,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:42:15,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:15,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:42:15,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:42:15,198 INFO L87 Difference]: Start difference. First operand 455 states and 549 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2021-11-07 01:42:17,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:17,099 INFO L93 Difference]: Finished difference Result 870 states and 1067 transitions. [2021-11-07 01:42:17,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:42:17,101 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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 79 [2021-11-07 01:42:17,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:17,105 INFO L225 Difference]: With dead ends: 870 [2021-11-07 01:42:17,106 INFO L226 Difference]: Without dead ends: 612 [2021-11-07 01:42:17,107 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:42:17,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-07 01:42:17,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 437. [2021-11-07 01:42:17,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 423 states have (on average 1.2458628841607564) internal successors, (527), 436 states have internal predecessors, (527), 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) [2021-11-07 01:42:17,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 527 transitions. [2021-11-07 01:42:17,169 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 527 transitions. Word has length 79 [2021-11-07 01:42:17,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:17,170 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 527 transitions. [2021-11-07 01:42:17,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2021-11-07 01:42:17,170 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 527 transitions. [2021-11-07 01:42:17,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 01:42:17,171 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:17,172 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:17,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-07 01:42:17,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:17,397 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:42:17,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:17,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1446027407, now seen corresponding path program 1 times [2021-11-07 01:42:17,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:17,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875009027] [2021-11-07 01:42:17,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:17,399 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:17,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:17,399 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:17,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:42:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:18,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:42:18,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:42:19,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:42:19,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:19,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875009027] [2021-11-07 01:42:19,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875009027] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:19,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:19,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-11-07 01:42:19,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982365527] [2021-11-07 01:42:19,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:42:19,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:19,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:42:19,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:42:19,414 INFO L87 Difference]: Start difference. First operand 437 states and 527 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 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) [2021-11-07 01:42:22,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:22,557 INFO L93 Difference]: Finished difference Result 1067 states and 1286 transitions. [2021-11-07 01:42:22,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:42:22,559 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 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 81 [2021-11-07 01:42:22,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:22,563 INFO L225 Difference]: With dead ends: 1067 [2021-11-07 01:42:22,563 INFO L226 Difference]: Without dead ends: 825 [2021-11-07 01:42:22,563 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:42:22,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-11-07 01:42:22,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 437. [2021-11-07 01:42:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 423 states have (on average 1.2387706855791962) internal successors, (524), 436 states have internal predecessors, (524), 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) [2021-11-07 01:42:22,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 524 transitions. [2021-11-07 01:42:22,641 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 524 transitions. Word has length 81 [2021-11-07 01:42:22,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:22,641 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 524 transitions. [2021-11-07 01:42:22,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 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) [2021-11-07 01:42:22,642 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 524 transitions. [2021-11-07 01:42:22,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:42:22,643 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:22,643 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:22,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:22,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:22,846 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:42:22,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:22,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1562028301, now seen corresponding path program 1 times [2021-11-07 01:42:22,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:22,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401775439] [2021-11-07 01:42:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:22,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:22,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:22,848 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:22,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:42:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:24,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:42:24,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:42:24,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:25,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 01:42:25,082 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:25,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401775439] [2021-11-07 01:42:25,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401775439] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:25,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:25,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-07 01:42:25,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768323321] [2021-11-07 01:42:25,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:42:25,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:25,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:42:25,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:42:25,087 INFO L87 Difference]: Start difference. First operand 437 states and 524 transitions. Second operand has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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) [2021-11-07 01:42:28,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:28,346 INFO L93 Difference]: Finished difference Result 1380 states and 1648 transitions. [2021-11-07 01:42:28,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 01:42:28,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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 83 [2021-11-07 01:42:28,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:28,353 INFO L225 Difference]: With dead ends: 1380 [2021-11-07 01:42:28,353 INFO L226 Difference]: Without dead ends: 1136 [2021-11-07 01:42:28,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:42:28,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-11-07 01:42:28,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 437. [2021-11-07 01:42:28,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 423 states have (on average 1.2316784869976358) internal successors, (521), 436 states have internal predecessors, (521), 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) [2021-11-07 01:42:28,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 521 transitions. [2021-11-07 01:42:28,401 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 521 transitions. Word has length 83 [2021-11-07 01:42:28,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:28,401 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 521 transitions. [2021-11-07 01:42:28,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.125) internal successors, (81), 8 states have internal predecessors, (81), 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) [2021-11-07 01:42:28,402 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 521 transitions. [2021-11-07 01:42:28,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:42:28,403 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:28,403 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:28,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-07 01:42:28,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:28,622 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:42:28,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:28,622 INFO L85 PathProgramCache]: Analyzing trace with hash 215042257, now seen corresponding path program 1 times [2021-11-07 01:42:28,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:28,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823617370] [2021-11-07 01:42:28,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:28,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:28,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:28,624 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:28,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:42:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:30,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:42:30,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:42:30,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:42:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:42:30,551 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:42:30,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823617370] [2021-11-07 01:42:30,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823617370] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:42:30,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:42:30,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:42:30,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708633357] [2021-11-07 01:42:30,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:42:30,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:42:30,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:42:30,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:42:30,553 INFO L87 Difference]: Start difference. First operand 437 states and 521 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2021-11-07 01:42:30,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:42:30,904 INFO L93 Difference]: Finished difference Result 1016 states and 1204 transitions. [2021-11-07 01:42:30,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:42:30,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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 88 [2021-11-07 01:42:30,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:42:30,908 INFO L225 Difference]: With dead ends: 1016 [2021-11-07 01:42:30,908 INFO L226 Difference]: Without dead ends: 609 [2021-11-07 01:42:30,909 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:42:30,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-11-07 01:42:30,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 435. [2021-11-07 01:42:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 421 states have (on average 1.190023752969121) internal successors, (501), 434 states have internal predecessors, (501), 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) [2021-11-07 01:42:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 501 transitions. [2021-11-07 01:42:30,965 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 501 transitions. Word has length 88 [2021-11-07 01:42:30,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:42:30,965 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 501 transitions. [2021-11-07 01:42:30,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2021-11-07 01:42:30,966 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 501 transitions. [2021-11-07 01:42:30,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 01:42:30,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:42:30,967 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:42:30,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:42:31,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:42:31,168 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 11 more)] === [2021-11-07 01:42:31,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:42:31,168 INFO L85 PathProgramCache]: Analyzing trace with hash -486557617, now seen corresponding path program 1 times [2021-11-07 01:42:31,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:42:31,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [373228078] [2021-11-07 01:42:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:42:31,169 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:42:31,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:42:31,172 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:42:31,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c70ca258-d337-4aad-bfaa-e543a05bf7de/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:42:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:42:32,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-07 01:42:32,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:42:33,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:33,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:33,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-07 01:42:33,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:42:33,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-07 01:42:37,427 INFO L354 Elim1Store]: treesize reduction 101, result has 2.9 percent of original size [2021-11-07 01:42:37,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 133 treesize of output 81 [2021-11-07 01:42:37,503 INFO L354 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2021-11-07 01:42:37,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 42 [2021-11-07 01:42:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:42:37,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:38,230 WARN L207 SmtUtils]: Spent 1.90 m on a formula simplification. DAG size of input: 234 DAG size of output: 173 [2021-11-07 01:44:38,232 INFO L354 Elim1Store]: treesize reduction 1465, result has 54.6 percent of original size [2021-11-07 01:44:38,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 14 new quantified variables, introduced 37 case distinctions, treesize of input 41513 treesize of output 35792