./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs --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 ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:50:17,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:50:17,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:50:17,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:50:17,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:50:17,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:50:17,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:50:17,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:50:17,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:50:17,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:50:17,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:50:17,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:50:17,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:50:17,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:50:17,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:50:17,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:50:17,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:50:17,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:50:17,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:50:17,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:50:17,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:50:17,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:50:17,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:50:17,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:50:17,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:50:17,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:50:17,461 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:50:17,462 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:50:17,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:50:17,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:50:17,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:50:17,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:50:17,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:50:17,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:50:17,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:50:17,470 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:50:17,471 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:50:17,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:50:17,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:50:17,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:50:17,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:50:17,475 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-19 15:50:17,515 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:50:17,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:50:17,517 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:50:17,517 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:50:17,517 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:50:17,518 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:50:17,518 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:50:17,518 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:50:17,521 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:50:17,522 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:50:17,523 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:50:17,523 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:50:17,523 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:50:17,524 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:50:17,524 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:50:17,524 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:50:17,525 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:50:17,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:50:17,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:50:17,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:50:17,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:50:17,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:50:17,526 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:50:17,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:50:17,527 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:50:17,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:50:17,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:50:17,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:50:17,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:50:17,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:50:17,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:50:17,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:50:17,529 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:50:17,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:50:17,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:50:17,530 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:50:17,530 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:50:17,530 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_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 [2021-11-19 15:50:17,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:50:17,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:50:17,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:50:17,816 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:50:17,817 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:50:17,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2021-11-19 15:50:17,885 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/data/0ecbf39b7/b75f6923f1f44ff197042f745444c3ce/FLAG7cee31e23 [2021-11-19 15:50:18,665 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:50:18,666 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2021-11-19 15:50:18,712 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/data/0ecbf39b7/b75f6923f1f44ff197042f745444c3ce/FLAG7cee31e23 [2021-11-19 15:50:18,773 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/data/0ecbf39b7/b75f6923f1f44ff197042f745444c3ce [2021-11-19 15:50:18,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:50:18,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:50:18,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:50:18,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:50:18,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:50:18,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:50:18" (1/1) ... [2021-11-19 15:50:18,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a3afeeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:18, skipping insertion in model container [2021-11-19 15:50:18,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:50:18" (1/1) ... [2021-11-19 15:50:18,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:50:18,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:50:19,213 WARN L230 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_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2021-11-19 15:50:19,220 WARN L230 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_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2021-11-19 15:50:19,242 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:50:19,248 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:50:20,207 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,214 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,215 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,215 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,217 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,253 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,260 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,263 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,263 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,265 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,266 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,267 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,268 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:20,634 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:50:20,636 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:50:20,638 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:50:20,640 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:50:20,645 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:50:20,645 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:50:20,646 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:50:20,649 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:50:20,650 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:50:20,665 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:50:20,806 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:50:20,830 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:20,852 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) [2021-11-19 15:50:20,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@48e991f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:20, skipping insertion in model container [2021-11-19 15:50:20,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:50:20,854 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:50:20,857 INFO L158 Benchmark]: Toolchain (without parser) took 2077.78ms. Allocated memory was 92.3MB in the beginning and 115.3MB in the end (delta: 23.1MB). Free memory was 58.2MB in the beginning and 59.3MB in the end (delta: -1.1MB). Peak memory consumption was 21.5MB. Max. memory is 16.1GB. [2021-11-19 15:50:20,858 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 92.3MB. Free memory is still 48.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:50:20,860 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2073.33ms. Allocated memory was 92.3MB in the beginning and 115.3MB in the end (delta: 23.1MB). Free memory was 57.9MB in the beginning and 59.3MB in the end (delta: -1.3MB). Peak memory consumption was 21.5MB. Max. memory is 16.1GB. [2021-11-19 15:50:20,862 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 92.3MB. Free memory is still 48.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2073.33ms. Allocated memory was 92.3MB in the beginning and 115.3MB in the end (delta: 23.1MB). Free memory was 57.9MB in the beginning and 59.3MB in the end (delta: -1.3MB). Peak memory consumption was 21.5MB. Max. memory is 16.1GB. * 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_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs --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 ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:50:23,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:50:23,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:50:23,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:50:23,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:50:23,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:50:23,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:50:23,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:50:23,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:50:23,273 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:50:23,274 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:50:23,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:50:23,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:50:23,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:50:23,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:50:23,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:50:23,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:50:23,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:50:23,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:50:23,287 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:50:23,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:50:23,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:50:23,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:50:23,293 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:50:23,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:50:23,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:50:23,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:50:23,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:50:23,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:50:23,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:50:23,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:50:23,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:50:23,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:50:23,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:50:23,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:50:23,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:50:23,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:50:23,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:50:23,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:50:23,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:50:23,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:50:23,316 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-19 15:50:23,365 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:50:23,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:50:23,367 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:50:23,367 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:50:23,368 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:50:23,368 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:50:23,368 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:50:23,368 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:50:23,369 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:50:23,369 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:50:23,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:50:23,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:50:23,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:50:23,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:50:23,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:50:23,373 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:50:23,373 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:50:23,373 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:50:23,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:50:23,374 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:50:23,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:50:23,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:50:23,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:50:23,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:50:23,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:50:23,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:50:23,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:50:23,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:50:23,376 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:50:23,376 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:23,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:50:23,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:50:23,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:50:23,377 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_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce5362e495562dfaea277a751eacbf753e9d90aa85c88e38ea1b10dbc078ec49 [2021-11-19 15:50:23,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:50:23,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:50:23,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:50:23,861 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:50:23,862 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:50:23,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2021-11-19 15:50:23,932 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/data/1a52ca5dc/58fb897b25dd428489844e6785cac6bd/FLAG0b4b43893 [2021-11-19 15:50:24,802 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:50:24,804 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i [2021-11-19 15:50:24,859 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/data/1a52ca5dc/58fb897b25dd428489844e6785cac6bd/FLAG0b4b43893 [2021-11-19 15:50:25,310 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/data/1a52ca5dc/58fb897b25dd428489844e6785cac6bd [2021-11-19 15:50:25,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:50:25,315 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:50:25,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:50:25,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:50:25,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:50:25,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:50:25" (1/1) ... [2021-11-19 15:50:25,330 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22aa5cb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:25, skipping insertion in model container [2021-11-19 15:50:25,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:50:25" (1/1) ... [2021-11-19 15:50:25,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:50:25,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:50:25,761 WARN L230 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_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2021-11-19 15:50:25,767 WARN L230 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_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2021-11-19 15:50:25,788 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:50:25,793 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:50:26,675 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:26,676 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:26,677 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:26,678 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:26,679 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:26,699 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:26,700 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:26,702 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:26,703 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:26,705 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:26,707 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:26,708 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:26,709 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,143 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:50:27,145 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:50:27,145 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:50:27,147 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:50:27,148 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:50:27,149 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:50:27,150 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:50:27,151 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:50:27,152 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:50:27,153 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:50:27,312 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:50:27,339 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:27,363 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:50:27,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:50:27,418 WARN L230 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_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2021-11-19 15:50:27,422 WARN L230 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_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2021-11-19 15:50:27,423 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:50:27,424 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:50:27,511 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,512 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,512 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,513 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,514 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,522 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,522 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,523 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,524 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,540 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,541 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,541 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,542 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,631 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:50:27,632 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:50:27,633 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:50:27,634 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:50:27,640 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:50:27,641 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:50:27,642 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:50:27,643 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:50:27,643 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:50:27,644 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:50:27,681 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:50:27,707 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:27,723 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:50:27,747 WARN L230 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_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4494,4507] [2021-11-19 15:50:27,748 WARN L230 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_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/sv-benchmarks/c/aws-c-common/aws_linked_list_rend_harness.i[4554,4567] [2021-11-19 15:50:27,750 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-19 15:50:27,751 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-19 15:50:27,814 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,815 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,815 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,815 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,816 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,823 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,823 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,824 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,825 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,826 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,827 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,827 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,827 WARN L1537 CHandler]: Possible shadowing of function index [2021-11-19 15:50:27,891 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-19 15:50:27,892 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-19 15:50:27,892 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-19 15:50:27,893 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-19 15:50:27,894 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-19 15:50:27,895 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-19 15:50:27,896 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-19 15:50:27,896 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-19 15:50:27,897 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-19 15:50:27,901 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-19 15:50:27,937 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-19 15:50:27,953 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:50:28,316 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:50:28,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28 WrapperNode [2021-11-19 15:50:28,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:50:28,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:50:28,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:50:28,336 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:50:28,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,462 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,506 INFO L137 Inliner]: procedures = 700, calls = 1042, calls flagged for inlining = 52, calls inlined = 6, statements flattened = 136 [2021-11-19 15:50:28,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:50:28,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:50:28,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:50:28,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:50:28,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:50:28,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:50:28,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:50:28,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:50:28,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (1/1) ... [2021-11-19 15:50:28,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:50:28,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:50:28,626 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:50:28,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:50:28,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 15:50:28,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:50:28,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 15:50:28,694 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 15:50:28,695 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-19 15:50:28,695 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-19 15:50:28,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 15:50:28,695 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-19 15:50:28,695 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-19 15:50:28,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:50:28,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 15:50:28,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:50:28,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:50:28,696 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 15:50:28,696 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 15:50:28,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 15:50:28,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 15:50:28,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 15:50:28,697 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-19 15:50:28,697 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-19 15:50:28,978 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:50:28,985 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:50:29,369 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:50:29,376 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:50:29,376 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 15:50:29,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:50:29 BoogieIcfgContainer [2021-11-19 15:50:29,387 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:50:29,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:50:29,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:50:29,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:50:29,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:50:25" (1/3) ... [2021-11-19 15:50:29,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a17ed39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:50:29, skipping insertion in model container [2021-11-19 15:50:29,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:50:28" (2/3) ... [2021-11-19 15:50:29,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a17ed39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:50:29, skipping insertion in model container [2021-11-19 15:50:29,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:50:29" (3/3) ... [2021-11-19 15:50:29,394 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_rend_harness.i [2021-11-19 15:50:29,400 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:50:29,400 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:50:29,452 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:50:29,459 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 [2021-11-19 15:50:29,459 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:50:29,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 15:50:29,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 15:50:29,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:29,493 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:29,493 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:29,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:29,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2107862704, now seen corresponding path program 1 times [2021-11-19 15:50:29,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:29,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887373936] [2021-11-19 15:50:29,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:29,524 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:29,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:29,529 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:29,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:50:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:29,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 15:50:29,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 15:50:30,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 15:50:30,214 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:30,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887373936] [2021-11-19 15:50:30,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887373936] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:30,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:30,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-19 15:50:30,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064887696] [2021-11-19 15:50:30,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:30,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 15:50:30,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:30,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 15:50:30,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:50:30,254 INFO L87 Difference]: Start difference. First operand has 68 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 49 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 15:50:30,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:30,285 INFO L93 Difference]: Finished difference Result 128 states and 184 transitions. [2021-11-19 15:50:30,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 15:50:30,287 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2021-11-19 15:50:30,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:30,296 INFO L225 Difference]: With dead ends: 128 [2021-11-19 15:50:30,296 INFO L226 Difference]: Without dead ends: 63 [2021-11-19 15:50:30,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 15:50:30,304 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:30,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:50:30,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-19 15:50:30,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-19 15:50:30,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 15:50:30,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2021-11-19 15:50:30,352 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 68 [2021-11-19 15:50:30,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:30,352 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2021-11-19 15:50:30,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 15:50:30,353 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2021-11-19 15:50:30,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 15:50:30,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:30,357 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:30,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:30,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:30,585 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:30,586 INFO L85 PathProgramCache]: Analyzing trace with hash 900796622, now seen corresponding path program 1 times [2021-11-19 15:50:30,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:30,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385562193] [2021-11-19 15:50:30,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:30,587 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:30,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:30,589 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:30,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:50:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:30,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:50:30,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 15:50:31,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 15:50:31,297 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:31,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385562193] [2021-11-19 15:50:31,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385562193] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:31,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:31,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-19 15:50:31,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450650705] [2021-11-19 15:50:31,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:31,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:50:31,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:31,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:50:31,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:50:31,302 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-19 15:50:31,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:31,382 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2021-11-19 15:50:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:50:31,383 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2021-11-19 15:50:31,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:31,386 INFO L225 Difference]: With dead ends: 114 [2021-11-19 15:50:31,387 INFO L226 Difference]: Without dead ends: 65 [2021-11-19 15:50:31,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:50:31,389 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 2 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:31,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 376 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:50:31,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-19 15:50:31,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-11-19 15:50:31,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 45 states have (on average 1.288888888888889) internal successors, (58), 47 states have internal predecessors, (58), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2021-11-19 15:50:31,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 86 transitions. [2021-11-19 15:50:31,404 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 86 transitions. Word has length 68 [2021-11-19 15:50:31,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:31,405 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 86 transitions. [2021-11-19 15:50:31,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-19 15:50:31,405 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 86 transitions. [2021-11-19 15:50:31,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 15:50:31,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:31,407 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 15:50:31,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:31,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:31,624 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:31,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:31,631 INFO L85 PathProgramCache]: Analyzing trace with hash 577933322, now seen corresponding path program 1 times [2021-11-19 15:50:31,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:31,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864693943] [2021-11-19 15:50:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:31,632 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:31,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:31,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:31,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:50:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:31,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:50:31,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 15:50:32,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 15:50:32,388 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:32,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864693943] [2021-11-19 15:50:32,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864693943] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:32,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:32,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2021-11-19 15:50:32,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337979549] [2021-11-19 15:50:32,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:32,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:50:32,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:32,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:50:32,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:50:32,392 INFO L87 Difference]: Start difference. First operand 65 states and 86 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 15:50:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:32,606 INFO L93 Difference]: Finished difference Result 119 states and 161 transitions. [2021-11-19 15:50:32,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:50:32,607 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2021-11-19 15:50:32,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:32,609 INFO L225 Difference]: With dead ends: 119 [2021-11-19 15:50:32,609 INFO L226 Difference]: Without dead ends: 68 [2021-11-19 15:50:32,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:50:32,611 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 38 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:32,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 285 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:50:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-19 15:50:32,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-19 15:50:32,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 50 states have internal predecessors, (60), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-19 15:50:32,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-11-19 15:50:32,637 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 70 [2021-11-19 15:50:32,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:32,638 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-11-19 15:50:32,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 15:50:32,638 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-11-19 15:50:32,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-19 15:50:32,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:32,644 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 15:50:32,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:32,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:32,857 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:32,858 INFO L85 PathProgramCache]: Analyzing trace with hash -34807881, now seen corresponding path program 1 times [2021-11-19 15:50:32,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:32,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776685473] [2021-11-19 15:50:32,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:32,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:32,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:32,861 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:32,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:50:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:33,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:50:33,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 15:50:33,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 15:50:33,637 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:33,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776685473] [2021-11-19 15:50:33,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776685473] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:33,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:33,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-11-19 15:50:33,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061587439] [2021-11-19 15:50:33,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:33,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:50:33,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:33,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:50:33,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:50:33,640 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 15:50:33,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:33,935 INFO L93 Difference]: Finished difference Result 134 states and 185 transitions. [2021-11-19 15:50:33,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:50:33,936 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-11-19 15:50:33,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:33,938 INFO L225 Difference]: With dead ends: 134 [2021-11-19 15:50:33,939 INFO L226 Difference]: Without dead ends: 80 [2021-11-19 15:50:33,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-19 15:50:33,944 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 66 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:33,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 343 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:50:33,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-19 15:50:33,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2021-11-19 15:50:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 52 states have internal predecessors, (63), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-19 15:50:33,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 93 transitions. [2021-11-19 15:50:33,971 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 93 transitions. Word has length 72 [2021-11-19 15:50:33,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:33,972 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 93 transitions. [2021-11-19 15:50:33,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 15:50:33,972 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 93 transitions. [2021-11-19 15:50:33,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-19 15:50:33,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:33,979 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 15:50:34,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:34,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:34,193 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:34,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:34,194 INFO L85 PathProgramCache]: Analyzing trace with hash 387052583, now seen corresponding path program 1 times [2021-11-19 15:50:34,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:34,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446962374] [2021-11-19 15:50:34,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:34,195 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:34,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:34,197 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:34,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:50:34,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:34,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:50:34,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:50:34,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-19 15:50:34,847 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:34,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446962374] [2021-11-19 15:50:34,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446962374] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:34,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:34,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3] total 7 [2021-11-19 15:50:34,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755552613] [2021-11-19 15:50:34,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:34,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:50:34,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:34,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:50:34,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:50:34,849 INFO L87 Difference]: Start difference. First operand 70 states and 93 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 15:50:35,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:35,051 INFO L93 Difference]: Finished difference Result 135 states and 189 transitions. [2021-11-19 15:50:35,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:50:35,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-11-19 15:50:35,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:35,053 INFO L225 Difference]: With dead ends: 135 [2021-11-19 15:50:35,053 INFO L226 Difference]: Without dead ends: 79 [2021-11-19 15:50:35,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:50:35,055 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 51 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:35,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 226 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:50:35,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-19 15:50:35,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2021-11-19 15:50:35,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.28) internal successors, (64), 53 states have internal predecessors, (64), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-19 15:50:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2021-11-19 15:50:35,068 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 73 [2021-11-19 15:50:35,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:35,069 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2021-11-19 15:50:35,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 15:50:35,069 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2021-11-19 15:50:35,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 15:50:35,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:35,071 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 15:50:35,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:35,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:35,291 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:35,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:35,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1595103561, now seen corresponding path program 1 times [2021-11-19 15:50:35,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:35,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956060204] [2021-11-19 15:50:35,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:35,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:35,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:35,294 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:35,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:50:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:35,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:50:35,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 15:50:35,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 15:50:35,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:35,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956060204] [2021-11-19 15:50:35,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956060204] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:35,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:35,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 15:50:35,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597608681] [2021-11-19 15:50:35,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:35,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:50:35,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:35,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:50:35,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:50:35,909 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 15:50:35,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:35,992 INFO L93 Difference]: Finished difference Result 134 states and 181 transitions. [2021-11-19 15:50:35,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:50:35,993 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2021-11-19 15:50:35,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:35,997 INFO L225 Difference]: With dead ends: 134 [2021-11-19 15:50:36,002 INFO L226 Difference]: Without dead ends: 77 [2021-11-19 15:50:36,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 15:50:36,004 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 4 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:36,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 467 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:50:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-19 15:50:36,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2021-11-19 15:50:36,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 54 states have internal predecessors, (65), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-19 15:50:36,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 95 transitions. [2021-11-19 15:50:36,022 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 95 transitions. Word has length 81 [2021-11-19 15:50:36,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:36,023 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 95 transitions. [2021-11-19 15:50:36,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 15:50:36,024 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 95 transitions. [2021-11-19 15:50:36,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 15:50:36,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:36,038 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 15:50:36,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:36,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:36,253 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:36,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:36,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1786751690, now seen corresponding path program 1 times [2021-11-19 15:50:36,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:36,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127880759] [2021-11-19 15:50:36,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:36,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:36,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:36,255 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:36,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 15:50:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:36,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 15:50:36,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 15:50:37,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 15:50:37,903 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:37,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127880759] [2021-11-19 15:50:37,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127880759] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:50:37,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1373630577] [2021-11-19 15:50:37,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:37,904 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:37,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:50:37,910 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:50:37,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-19 15:50:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:38,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:50:38,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 15:50:38,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:38,732 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 15:50:38,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1373630577] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:38,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:50:38,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8, 8] total 19 [2021-11-19 15:50:38,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302183550] [2021-11-19 15:50:38,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:38,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:50:38,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:38,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:50:38,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-11-19 15:50:38,735 INFO L87 Difference]: Start difference. First operand 72 states and 95 transitions. Second operand has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 15:50:38,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:38,947 INFO L93 Difference]: Finished difference Result 139 states and 188 transitions. [2021-11-19 15:50:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 15:50:38,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 83 [2021-11-19 15:50:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:38,951 INFO L225 Difference]: With dead ends: 139 [2021-11-19 15:50:38,951 INFO L226 Difference]: Without dead ends: 81 [2021-11-19 15:50:38,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-11-19 15:50:38,953 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 8 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:38,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 551 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:50:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-19 15:50:38,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2021-11-19 15:50:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.2692307692307692) internal successors, (66), 55 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-19 15:50:38,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2021-11-19 15:50:38,968 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 83 [2021-11-19 15:50:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:38,968 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2021-11-19 15:50:38,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 15:50:38,968 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2021-11-19 15:50:38,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 15:50:38,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:38,974 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:38,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:39,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:39,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:39,382 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:39,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:39,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1911369352, now seen corresponding path program 1 times [2021-11-19 15:50:39,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:39,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511311365] [2021-11-19 15:50:39,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:39,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:39,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:39,387 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:39,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 15:50:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:39,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 15:50:39,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 15:50:41,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:44,648 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 15:50:44,649 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 40 treesize of output 35 [2021-11-19 15:50:44,665 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-19 15:50:44,665 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 31 treesize of output 19 [2021-11-19 15:50:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 15:50:44,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:44,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511311365] [2021-11-19 15:50:44,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511311365] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:50:44,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1723050250] [2021-11-19 15:50:44,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:44,753 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:44,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:50:44,759 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:50:44,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-19 15:50:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:44,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 15:50:44,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 15:50:45,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 15:50:45,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1723050250] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:45,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:50:45,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13, 10, 6] total 24 [2021-11-19 15:50:45,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599446383] [2021-11-19 15:50:45,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:45,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:50:45,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:45,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:50:45,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-11-19 15:50:45,516 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 15:50:45,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:45,587 INFO L93 Difference]: Finished difference Result 127 states and 169 transitions. [2021-11-19 15:50:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:50:45,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2021-11-19 15:50:45,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:45,589 INFO L225 Difference]: With dead ends: 127 [2021-11-19 15:50:45,589 INFO L226 Difference]: Without dead ends: 75 [2021-11-19 15:50:45,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 307 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-11-19 15:50:45,591 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 2 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:45,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 376 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 15:50:45,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-19 15:50:45,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-19 15:50:45,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 57 states have internal predecessors, (67), 13 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2021-11-19 15:50:45,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 99 transitions. [2021-11-19 15:50:45,601 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 99 transitions. Word has length 84 [2021-11-19 15:50:45,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:45,602 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 99 transitions. [2021-11-19 15:50:45,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 15:50:45,602 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 99 transitions. [2021-11-19 15:50:45,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-19 15:50:45,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:45,604 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 15:50:45,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:45,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:46,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:50:46,023 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:46,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:46,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1945074884, now seen corresponding path program 1 times [2021-11-19 15:50:46,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:46,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287647978] [2021-11-19 15:50:46,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:46,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:46,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:46,026 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:46,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 15:50:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:46,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 15:50:46,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:50:46,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 15:50:46,704 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:46,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287647978] [2021-11-19 15:50:46,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287647978] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:46,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:46,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-11-19 15:50:46,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293193400] [2021-11-19 15:50:46,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:46,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:50:46,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:46,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:50:46,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:50:46,706 INFO L87 Difference]: Start difference. First operand 75 states and 99 transitions. Second operand has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 15:50:46,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:46,910 INFO L93 Difference]: Finished difference Result 136 states and 178 transitions. [2021-11-19 15:50:46,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:50:46,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 86 [2021-11-19 15:50:46,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:46,912 INFO L225 Difference]: With dead ends: 136 [2021-11-19 15:50:46,912 INFO L226 Difference]: Without dead ends: 75 [2021-11-19 15:50:46,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-19 15:50:46,914 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 42 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:46,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 342 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:50:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-19 15:50:46,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-19 15:50:46,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 57 states have internal predecessors, (66), 13 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (19), 12 states have call predecessors, (19), 12 states have call successors, (19) [2021-11-19 15:50:46,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-11-19 15:50:46,924 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 86 [2021-11-19 15:50:46,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:46,924 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-11-19 15:50:46,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.833333333333334) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 15:50:46,925 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-11-19 15:50:46,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-19 15:50:46,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:46,926 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:46,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:47,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:47,148 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:47,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:47,148 INFO L85 PathProgramCache]: Analyzing trace with hash -110525007, now seen corresponding path program 1 times [2021-11-19 15:50:47,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:47,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132643923] [2021-11-19 15:50:47,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:47,149 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:47,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:47,150 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:47,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 15:50:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:47,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 15:50:47,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 15:50:47,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 15:50:47,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:47,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132643923] [2021-11-19 15:50:47,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132643923] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:50:47,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 15:50:47,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2021-11-19 15:50:47,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232623212] [2021-11-19 15:50:47,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:47,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:50:47,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:47,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:50:47,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-19 15:50:47,929 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 15:50:48,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:48,209 INFO L93 Difference]: Finished difference Result 138 states and 181 transitions. [2021-11-19 15:50:48,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:50:48,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 88 [2021-11-19 15:50:48,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:48,212 INFO L225 Difference]: With dead ends: 138 [2021-11-19 15:50:48,212 INFO L226 Difference]: Without dead ends: 76 [2021-11-19 15:50:48,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-19 15:50:48,213 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 63 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:48,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 394 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 15:50:48,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-19 15:50:48,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2021-11-19 15:50:48,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.24) internal successors, (62), 53 states have internal predecessors, (62), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-19 15:50:48,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2021-11-19 15:50:48,223 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 88 [2021-11-19 15:50:48,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:48,224 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2021-11-19 15:50:48,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 8 states have internal predecessors, (67), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 15:50:48,224 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2021-11-19 15:50:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 15:50:48,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:48,226 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:48,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:48,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:48,441 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:48,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:48,442 INFO L85 PathProgramCache]: Analyzing trace with hash -803958397, now seen corresponding path program 1 times [2021-11-19 15:50:48,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:48,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866504980] [2021-11-19 15:50:48,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:48,442 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:48,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:48,443 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:48,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 15:50:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:48,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 15:50:48,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 51 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:50:56,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:18,919 INFO L354 Elim1Store]: treesize reduction 21, result has 79.6 percent of original size [2021-11-19 15:51:18,920 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 129 [2021-11-19 15:51:19,412 INFO L354 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2021-11-19 15:51:19,413 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 143 [2021-11-19 15:51:25,980 INFO L354 Elim1Store]: treesize reduction 21, result has 79.6 percent of original size [2021-11-19 15:51:25,980 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 125 [2021-11-19 15:51:26,373 INFO L354 Elim1Store]: treesize reduction 8, result has 88.1 percent of original size [2021-11-19 15:51:26,373 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 143 [2021-11-19 15:51:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 15:51:28,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:28,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866504980] [2021-11-19 15:51:28,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866504980] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:51:28,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [460001356] [2021-11-19 15:51:28,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:28,567 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:51:28,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:51:28,568 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:51:28,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 15:51:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:28,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 15:51:28,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 15:51:29,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-19 15:51:29,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [460001356] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:51:29,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:51:29,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [24, 21, 7] total 46 [2021-11-19 15:51:29,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352685249] [2021-11-19 15:51:29,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:29,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:51:29,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:29,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:51:29,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1913, Unknown=4, NotChecked=0, Total=2070 [2021-11-19 15:51:29,882 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 15:51:30,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:30,106 INFO L93 Difference]: Finished difference Result 124 states and 163 transitions. [2021-11-19 15:51:30,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 15:51:30,107 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 97 [2021-11-19 15:51:30,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:30,108 INFO L225 Difference]: With dead ends: 124 [2021-11-19 15:51:30,108 INFO L226 Difference]: Without dead ends: 74 [2021-11-19 15:51:30,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 339 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=162, Invalid=2090, Unknown=4, NotChecked=0, Total=2256 [2021-11-19 15:51:30,110 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 4 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:30,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 456 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:51:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-19 15:51:30,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-11-19 15:51:30,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 54 states have internal predecessors, (63), 13 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (17), 12 states have call predecessors, (17), 12 states have call successors, (17) [2021-11-19 15:51:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2021-11-19 15:51:30,120 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 97 [2021-11-19 15:51:30,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:30,120 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2021-11-19 15:51:30,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-19 15:51:30,120 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2021-11-19 15:51:30,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 15:51:30,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:30,121 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:51:30,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:30,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-19 15:51:30,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 15:51:30,522 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:51:30,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:30,522 INFO L85 PathProgramCache]: Analyzing trace with hash -526621008, now seen corresponding path program 2 times [2021-11-19 15:51:30,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:30,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158777314] [2021-11-19 15:51:30,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:51:30,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:30,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:30,524 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:30,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 15:51:30,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:51:30,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:51:30,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 15:51:30,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:33,026 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 35 proven. 23 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 15:51:33,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:36,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:51:36,356 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 40 treesize of output 43 [2021-11-19 15:51:36,373 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 15:51:36,373 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 39 treesize of output 34 [2021-11-19 15:51:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-19 15:51:36,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:36,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158777314] [2021-11-19 15:51:36,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158777314] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:51:36,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1550176615] [2021-11-19 15:51:36,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:51:36,470 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:51:36,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:51:36,471 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:51:36,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 15:51:36,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:51:36,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:51:36,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 15:51:36,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 15:51:37,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 15:51:37,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1550176615] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 15:51:37,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-19 15:51:37,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13, 10, 8] total 26 [2021-11-19 15:51:37,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700191914] [2021-11-19 15:51:37,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:37,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:51:37,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:37,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:51:37,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-11-19 15:51:37,628 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 8 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-19 15:51:37,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:37,771 INFO L93 Difference]: Finished difference Result 125 states and 163 transitions. [2021-11-19 15:51:37,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 15:51:37,773 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 99 [2021-11-19 15:51:37,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:37,774 INFO L225 Difference]: With dead ends: 125 [2021-11-19 15:51:37,774 INFO L226 Difference]: Without dead ends: 74 [2021-11-19 15:51:37,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 362 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-11-19 15:51:37,776 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 8 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:37,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 520 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:51:37,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-19 15:51:37,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2021-11-19 15:51:37,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 51 states have internal predecessors, (61), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-19 15:51:37,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2021-11-19 15:51:37,784 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 99 [2021-11-19 15:51:37,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:37,784 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2021-11-19 15:51:37,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.714285714285714) internal successors, (61), 7 states have internal predecessors, (61), 4 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-19 15:51:37,785 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2021-11-19 15:51:37,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 15:51:37,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:37,786 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:51:37,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:38,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:38,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:51:38,209 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:51:38,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:38,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1438193982, now seen corresponding path program 2 times [2021-11-19 15:51:38,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:38,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1121274731] [2021-11-19 15:51:38,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:51:38,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:38,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:38,211 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:38,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 15:51:38,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:51:38,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:51:38,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-19 15:51:38,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 15:51:40,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:43,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:51:43,941 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 40 treesize of output 43 [2021-11-19 15:51:43,960 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-11-19 15:51:43,960 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 39 treesize of output 34 [2021-11-19 15:51:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 15:51:44,041 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:44,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1121274731] [2021-11-19 15:51:44,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1121274731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 15:51:44,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1252731182] [2021-11-19 15:51:44,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 15:51:44,042 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 15:51:44,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 15:51:44,049 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 15:51:44,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4cc4bcc6-7dd7-44bb-a28d-782a0815e57f/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 15:51:44,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 15:51:44,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 15:51:44,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-19 15:51:44,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:50,950 WARN L227 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 19 DAG size of output: 7 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 15:51:50,950 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-19 15:51:50,950 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 1 case distinctions, treesize of input 63 treesize of output 50 [2021-11-19 15:51:59,366 WARN L227 SmtUtils]: Spent 8.41s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-19 15:51:59,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:51:59,366 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 1 case distinctions, treesize of input 71 treesize of output 84