./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/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_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/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 32bit --witnessprinter.graph.data.programhash 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:26:46,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:26:46,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:26:46,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:26:46,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:26:46,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:26:46,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:26:46,416 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:26:46,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:26:46,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:26:46,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:26:46,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:26:46,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:26:46,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:26:46,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:26:46,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:26:46,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:26:46,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:26:46,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:26:46,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:26:46,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:26:46,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:26:46,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:26:46,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:26:46,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:26:46,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:26:46,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:26:46,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:26:46,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:26:46,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:26:46,473 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:26:46,474 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:26:46,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:26:46,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:26:46,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:26:46,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:26:46,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:26:46,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:26:46,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:26:46,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:26:46,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:26:46,483 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:26:46,526 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:26:46,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:26:46,528 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:26:46,528 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:26:46,529 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:26:46,529 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:26:46,529 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:26:46,529 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:26:46,530 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:26:46,530 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:26:46,537 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:26:46,537 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:26:46,538 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:26:46,538 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:26:46,538 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:26:46,538 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:26:46,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:26:46,539 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:26:46,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:26:46,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:26:46,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:26:46,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:26:46,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:26:46,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:26:46,541 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:26:46,541 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:26:46,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:26:46,542 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:26:46,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:26:46,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:26:46,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:26:46,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:26:46,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:26:46,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:26:46,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:26:46,545 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:26:46,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:26:46,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:26:46,546 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:26:46,546 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:26:46,546 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_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d [2021-11-19 14:26:46,829 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:26:46,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:26:46,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:26:46,864 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:26:46,864 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:26:46,866 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2021-11-19 14:26:46,945 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/data/a5863866d/8282f037a88e465cb618f94e7d96e689/FLAG8cb4e8279 [2021-11-19 14:26:47,571 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:26:47,572 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2021-11-19 14:26:47,596 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/data/a5863866d/8282f037a88e465cb618f94e7d96e689/FLAG8cb4e8279 [2021-11-19 14:26:47,808 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/data/a5863866d/8282f037a88e465cb618f94e7d96e689 [2021-11-19 14:26:47,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:26:47,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:26:47,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:26:47,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:26:47,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:26:47,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:26:47" (1/1) ... [2021-11-19 14:26:47,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f391f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:47, skipping insertion in model container [2021-11-19 14:26:47,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:26:47" (1/1) ... [2021-11-19 14:26:47,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:26:47,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:26:48,361 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_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2021-11-19 14:26:48,498 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:26:48,509 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 14:26:48,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@15182c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:48, skipping insertion in model container [2021-11-19 14:26:48,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:26:48,510 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:26:48,512 INFO L158 Benchmark]: Toolchain (without parser) took 699.65ms. Allocated memory is still 107.0MB. Free memory was 69.2MB in the beginning and 69.4MB in the end (delta: -282.9kB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-19 14:26:48,513 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 79.7MB. Free memory was 55.1MB in the beginning and 55.1MB in the end (delta: 27.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:26:48,514 INFO L158 Benchmark]: CACSL2BoogieTranslator took 688.74ms. Allocated memory is still 107.0MB. Free memory was 68.8MB in the beginning and 69.4MB in the end (delta: -620.3kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 14:26:48,516 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 79.7MB. Free memory was 55.1MB in the beginning and 55.1MB in the end (delta: 27.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 688.74ms. Allocated memory is still 107.0MB. Free memory was 68.8MB in the beginning and 69.4MB in the end (delta: -620.3kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1668]: 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_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/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_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/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 32bit --witnessprinter.graph.data.programhash 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:26:50,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:26:50,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:26:50,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:26:50,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:26:50,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:26:50,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:26:50,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:26:50,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:26:50,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:26:50,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:26:50,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:26:50,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:26:50,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:26:50,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:26:50,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:26:50,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:26:50,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:26:50,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:26:50,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:26:50,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:26:50,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:26:50,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:26:50,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:26:50,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:26:50,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:26:50,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:26:50,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:26:50,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:26:50,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:26:50,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:26:50,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:26:50,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:26:50,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:26:50,934 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:26:50,935 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:26:50,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:26:50,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:26:50,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:26:50,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:26:50,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:26:50,955 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:26:50,991 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:26:50,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:26:50,992 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:26:50,993 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:26:50,993 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:26:50,993 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:26:50,994 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:26:50,994 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:26:50,994 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:26:50,994 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:26:50,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:26:50,995 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:26:50,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:26:50,996 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:26:50,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:26:50,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:26:50,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:26:50,997 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:26:50,997 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:26:50,997 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:26:50,998 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:26:50,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:26:50,998 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:26:50,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:26:50,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:26:50,999 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:26:50,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:26:50,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:26:51,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:26:51,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:26:51,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:26:51,000 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:26:51,001 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:26:51,001 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:26:51,001 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:26:51,001 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:26:51,001 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_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f11976cf57fe8d65e71fe2317840ceb817472b70b756607274947c31f43df4d [2021-11-19 14:26:51,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:26:51,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:26:51,381 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:26:51,382 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:26:51,384 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:26:51,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2021-11-19 14:26:51,455 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/data/2aee47a1a/b2116cd7b49c48a98f4269abe0320e22/FLAG34daf8688 [2021-11-19 14:26:52,130 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:26:52,131 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c [2021-11-19 14:26:52,159 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/data/2aee47a1a/b2116cd7b49c48a98f4269abe0320e22/FLAG34daf8688 [2021-11-19 14:26:52,303 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/data/2aee47a1a/b2116cd7b49c48a98f4269abe0320e22 [2021-11-19 14:26:52,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:26:52,306 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:26:52,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:26:52,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:26:52,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:26:52,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:26:52" (1/1) ... [2021-11-19 14:26:52,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ae971c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:52, skipping insertion in model container [2021-11-19 14:26:52,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:26:52" (1/1) ... [2021-11-19 14:26:52,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:26:52,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:26:52,907 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_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2021-11-19 14:26:52,983 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:26:53,003 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:26:53,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:26:53,155 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_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2021-11-19 14:26:53,186 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:26:53,191 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:26:53,273 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_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/sv-benchmarks/c/product-lines/elevator_spec1_product20.cil.c[45414,45427] [2021-11-19 14:26:53,331 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:26:53,361 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:26:53,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53 WrapperNode [2021-11-19 14:26:53,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:26:53,363 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:26:53,364 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:26:53,364 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:26:53,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,433 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,507 INFO L137 Inliner]: procedures = 98, calls = 347, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 1062 [2021-11-19 14:26:53,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:26:53,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:26:53,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:26:53,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:26:53,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:26:53,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:26:53,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:26:53,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:26:53,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (1/1) ... [2021-11-19 14:26:53,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:26:53,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:26:53,678 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:26:53,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:26:53,728 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 14:26:53,728 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 14:26:53,728 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-19 14:26:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-19 14:26:53,729 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:26:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:26:53,729 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:26:53,729 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:26:53,729 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:26:53,730 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:26:53,730 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:26:53,730 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:26:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:26:53,731 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:26:53,731 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 14:26:53,753 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 14:26:53,754 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:26:53,754 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:26:53,754 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:26:53,754 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:26:53,754 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 14:26:53,754 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 14:26:53,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:26:53,755 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 14:26:53,755 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 14:26:53,755 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 14:26:53,755 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 14:26:53,755 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:26:53,756 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:26:53,756 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:26:53,756 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:26:53,757 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 14:26:53,757 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 14:26:53,758 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:26:53,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:26:53,758 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:26:53,758 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:26:53,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:26:53,758 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:26:53,759 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:26:53,759 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:26:53,759 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:26:53,759 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:26:53,759 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:26:53,759 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:26:53,759 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:26:53,760 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:26:53,760 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:26:53,761 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:26:53,762 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:26:53,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:26:53,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:26:53,764 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:26:53,764 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:26:53,764 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-19 14:26:53,764 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-19 14:26:53,979 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:26:53,981 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:26:55,223 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:26:55,236 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:26:55,236 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:26:55,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:26:55 BoogieIcfgContainer [2021-11-19 14:26:55,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:26:55,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:26:55,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:26:55,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:26:55,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:26:52" (1/3) ... [2021-11-19 14:26:55,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a877106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:26:55, skipping insertion in model container [2021-11-19 14:26:55,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:26:53" (2/3) ... [2021-11-19 14:26:55,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a877106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:26:55, skipping insertion in model container [2021-11-19 14:26:55,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:26:55" (3/3) ... [2021-11-19 14:26:55,247 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product20.cil.c [2021-11-19 14:26:55,252 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:26:55,252 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:26:55,304 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:26:55,313 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 14:26:55,314 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:26:55,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 576 states, 446 states have (on average 1.6816143497757847) internal successors, (750), 469 states have internal predecessors, (750), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 95 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-19 14:26:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-19 14:26:55,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:55,394 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 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 14:26:55,395 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:55,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:55,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1381610677, now seen corresponding path program 1 times [2021-11-19 14:26:55,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:55,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625212047] [2021-11-19 14:26:55,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:55,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:55,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:55,419 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:55,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:26:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:55,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:26:56,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:26:56,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:56,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:26:56,498 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:56,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625212047] [2021-11-19 14:26:56,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625212047] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:26:56,500 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:26:56,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:26:56,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552009681] [2021-11-19 14:26:56,503 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:56,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:26:56,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:56,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:26:56,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:26:56,556 INFO L87 Difference]: Start difference. First operand has 576 states, 446 states have (on average 1.6816143497757847) internal successors, (750), 469 states have internal predecessors, (750), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 95 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 14:26:56,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:56,655 INFO L93 Difference]: Finished difference Result 597 states and 984 transitions. [2021-11-19 14:26:56,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:26:56,657 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 83 [2021-11-19 14:26:56,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:56,685 INFO L225 Difference]: With dead ends: 597 [2021-11-19 14:26:56,686 INFO L226 Difference]: Without dead ends: 568 [2021-11-19 14:26:56,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 164 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 14:26:56,694 INFO L933 BasicCegarLoop]: 945 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, 945 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 14:26:56,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:26:56,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-19 14:26:56,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-19 14:26:56,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 440 states have (on average 1.6795454545454545) internal successors, (739), 461 states have internal predecessors, (739), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:26:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 938 transitions. [2021-11-19 14:26:56,827 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 938 transitions. Word has length 83 [2021-11-19 14:26:56,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:56,829 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 938 transitions. [2021-11-19 14:26:56,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.0) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-19 14:26:56,830 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 938 transitions. [2021-11-19 14:26:56,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 14:26:56,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:56,837 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 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 14:26:56,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:57,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:57,056 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:57,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:57,057 INFO L85 PathProgramCache]: Analyzing trace with hash 806951007, now seen corresponding path program 1 times [2021-11-19 14:26:57,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:57,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969542187] [2021-11-19 14:26:57,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:57,058 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:57,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:57,061 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:57,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:26:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:57,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:26:57,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:26:57,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:26:57,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:57,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969542187] [2021-11-19 14:26:57,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969542187] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:57,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:26:57,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:26:57,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490326199] [2021-11-19 14:26:57,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:57,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:26:57,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:57,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:26:57,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:26:57,969 INFO L87 Difference]: Start difference. First operand 568 states and 938 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:26:58,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:58,116 INFO L93 Difference]: Finished difference Result 1127 states and 1868 transitions. [2021-11-19 14:26:58,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:26:58,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 85 [2021-11-19 14:26:58,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:58,153 INFO L225 Difference]: With dead ends: 1127 [2021-11-19 14:26:58,153 INFO L226 Difference]: Without dead ends: 568 [2021-11-19 14:26:58,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:26:58,164 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 14 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:58,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2765 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:26:58,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-19 14:26:58,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-19 14:26:58,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 440 states have (on average 1.6772727272727272) internal successors, (738), 461 states have internal predecessors, (738), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:26:58,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 937 transitions. [2021-11-19 14:26:58,244 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 937 transitions. Word has length 85 [2021-11-19 14:26:58,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:58,247 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 937 transitions. [2021-11-19 14:26:58,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:26:58,248 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 937 transitions. [2021-11-19 14:26:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-19 14:26:58,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:58,261 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:26:58,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:58,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:58,483 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:58,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:58,484 INFO L85 PathProgramCache]: Analyzing trace with hash 103183749, now seen corresponding path program 1 times [2021-11-19 14:26:58,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:58,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832934697] [2021-11-19 14:26:58,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:58,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:58,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:58,486 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:58,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:26:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:26:58,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:26:58,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:26:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:26:59,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:26:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:26:59,319 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:26:59,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832934697] [2021-11-19 14:26:59,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832934697] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:26:59,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:26:59,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:26:59,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710438438] [2021-11-19 14:26:59,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:26:59,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:26:59,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:26:59,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:26:59,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:26:59,323 INFO L87 Difference]: Start difference. First operand 568 states and 937 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:26:59,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:26:59,396 INFO L93 Difference]: Finished difference Result 1127 states and 1866 transitions. [2021-11-19 14:26:59,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:26:59,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 87 [2021-11-19 14:26:59,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:26:59,403 INFO L225 Difference]: With dead ends: 1127 [2021-11-19 14:26:59,403 INFO L226 Difference]: Without dead ends: 568 [2021-11-19 14:26:59,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:26:59,408 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 12 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:26:59,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2765 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:26:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-19 14:26:59,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-19 14:26:59,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 440 states have (on average 1.675) internal successors, (737), 461 states have internal predecessors, (737), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:26:59,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 936 transitions. [2021-11-19 14:26:59,440 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 936 transitions. Word has length 87 [2021-11-19 14:26:59,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:26:59,441 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 936 transitions. [2021-11-19 14:26:59,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:26:59,442 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 936 transitions. [2021-11-19 14:26:59,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 14:26:59,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:26:59,444 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 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 14:26:59,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:26:59,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:26:59,657 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:26:59,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:26:59,660 INFO L85 PathProgramCache]: Analyzing trace with hash -713435681, now seen corresponding path program 1 times [2021-11-19 14:26:59,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:26:59,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010536555] [2021-11-19 14:26:59,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:26:59,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:26:59,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:26:59,662 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:26:59,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:27:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:00,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:27:00,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:27:00,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:27:00,527 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:00,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010536555] [2021-11-19 14:27:00,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010536555] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:00,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:27:00,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:27:00,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72176709] [2021-11-19 14:27:00,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:00,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:27:00,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:00,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:27:00,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:27:00,530 INFO L87 Difference]: Start difference. First operand 568 states and 936 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:27:00,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:00,603 INFO L93 Difference]: Finished difference Result 1131 states and 1869 transitions. [2021-11-19 14:27:00,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:27:00,604 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 89 [2021-11-19 14:27:00,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:00,610 INFO L225 Difference]: With dead ends: 1131 [2021-11-19 14:27:00,610 INFO L226 Difference]: Without dead ends: 574 [2021-11-19 14:27:00,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:27:00,615 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 13 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:00,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2765 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:27:00,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-19 14:27:00,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-19 14:27:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 445 states have (on average 1.6674157303370787) internal successors, (742), 466 states have internal predecessors, (742), 102 states have call successors, (102), 27 states have call predecessors, (102), 26 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:27:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 941 transitions. [2021-11-19 14:27:00,646 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 941 transitions. Word has length 89 [2021-11-19 14:27:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:00,647 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 941 transitions. [2021-11-19 14:27:00,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:27:00,647 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 941 transitions. [2021-11-19 14:27:00,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-19 14:27:00,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:00,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:00,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:00,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:00,865 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:00,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:00,866 INFO L85 PathProgramCache]: Analyzing trace with hash 691765280, now seen corresponding path program 1 times [2021-11-19 14:27:00,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:00,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1274371225] [2021-11-19 14:27:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:00,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:00,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:00,870 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:00,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:27:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:01,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:27:01,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:27:01,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:27:01,768 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:01,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1274371225] [2021-11-19 14:27:01,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1274371225] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:01,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:27:01,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:27:01,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37680329] [2021-11-19 14:27:01,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:01,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:27:01,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:01,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:27:01,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:27:01,773 INFO L87 Difference]: Start difference. First operand 574 states and 941 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:27:01,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:01,844 INFO L93 Difference]: Finished difference Result 1130 states and 1860 transitions. [2021-11-19 14:27:01,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:27:01,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 90 [2021-11-19 14:27:01,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:01,851 INFO L225 Difference]: With dead ends: 1130 [2021-11-19 14:27:01,851 INFO L226 Difference]: Without dead ends: 574 [2021-11-19 14:27:01,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:27:01,859 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 8 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2766 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:01,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2766 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:27:01,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-19 14:27:01,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-19 14:27:01,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 445 states have (on average 1.6651685393258426) internal successors, (741), 466 states have internal predecessors, (741), 102 states have call successors, (102), 27 states have call predecessors, (102), 26 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:27:01,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 940 transitions. [2021-11-19 14:27:01,887 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 940 transitions. Word has length 90 [2021-11-19 14:27:01,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:01,888 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 940 transitions. [2021-11-19 14:27:01,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:27:01,888 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 940 transitions. [2021-11-19 14:27:01,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 14:27:01,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:01,891 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:01,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:02,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:02,112 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:02,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:02,112 INFO L85 PathProgramCache]: Analyzing trace with hash 476563715, now seen corresponding path program 1 times [2021-11-19 14:27:02,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:02,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305189722] [2021-11-19 14:27:02,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:02,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:02,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:02,115 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:02,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:27:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:02,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:27:02,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:27:02,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:27:02,909 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:02,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305189722] [2021-11-19 14:27:02,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305189722] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:02,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:27:02,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:27:02,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573699746] [2021-11-19 14:27:02,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:02,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:27:02,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:02,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:27:02,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:27:02,912 INFO L87 Difference]: Start difference. First operand 574 states and 940 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:27:02,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:02,976 INFO L93 Difference]: Finished difference Result 1130 states and 1859 transitions. [2021-11-19 14:27:02,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:27:02,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 91 [2021-11-19 14:27:02,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:02,985 INFO L225 Difference]: With dead ends: 1130 [2021-11-19 14:27:02,987 INFO L226 Difference]: Without dead ends: 574 [2021-11-19 14:27:02,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:27:02,995 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 6 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2766 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 14:27:02,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2766 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:27:02,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-19 14:27:03,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-19 14:27:03,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 445 states have (on average 1.6629213483146068) internal successors, (740), 466 states have internal predecessors, (740), 102 states have call successors, (102), 27 states have call predecessors, (102), 26 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:27:03,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 939 transitions. [2021-11-19 14:27:03,027 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 939 transitions. Word has length 91 [2021-11-19 14:27:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:03,028 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 939 transitions. [2021-11-19 14:27:03,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:27:03,028 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 939 transitions. [2021-11-19 14:27:03,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 14:27:03,030 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:03,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:03,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:03,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:03,254 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:03,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:03,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1568491396, now seen corresponding path program 1 times [2021-11-19 14:27:03,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:03,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750543634] [2021-11-19 14:27:03,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:03,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:03,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:03,257 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:03,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:27:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:03,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:27:03,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:03,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:27:04,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:04,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750543634] [2021-11-19 14:27:04,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750543634] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:04,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:27:04,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 14:27:04,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003765588] [2021-11-19 14:27:04,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:04,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:27:04,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:04,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:27:04,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:27:04,183 INFO L87 Difference]: Start difference. First operand 574 states and 939 transitions. Second operand has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:27:04,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:04,391 INFO L93 Difference]: Finished difference Result 1147 states and 1887 transitions. [2021-11-19 14:27:04,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:27:04,392 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2021-11-19 14:27:04,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:04,398 INFO L225 Difference]: With dead ends: 1147 [2021-11-19 14:27:04,398 INFO L226 Difference]: Without dead ends: 595 [2021-11-19 14:27:04,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:27:04,403 INFO L933 BasicCegarLoop]: 923 mSDtfsCounter, 148 mSDsluCounter, 4508 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5431 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:04,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5431 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:27:04,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-19 14:27:04,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 593. [2021-11-19 14:27:04,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 461 states have (on average 1.6616052060737527) internal successors, (766), 484 states have internal predecessors, (766), 103 states have call successors, (103), 27 states have call predecessors, (103), 28 states have return successors, (101), 95 states have call predecessors, (101), 98 states have call successors, (101) [2021-11-19 14:27:04,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 970 transitions. [2021-11-19 14:27:04,434 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 970 transitions. Word has length 92 [2021-11-19 14:27:04,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:04,435 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 970 transitions. [2021-11-19 14:27:04,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:27:04,435 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 970 transitions. [2021-11-19 14:27:04,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-19 14:27:04,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:04,438 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:04,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:04,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:04,653 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:04,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:04,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1859423675, now seen corresponding path program 1 times [2021-11-19 14:27:04,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:04,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626595474] [2021-11-19 14:27:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:04,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:04,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:04,655 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:04,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:27:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:05,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:27:05,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 14:27:05,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:05,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:27:05,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:05,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626595474] [2021-11-19 14:27:05,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626595474] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:05,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:27:05,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 14:27:05,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608564471] [2021-11-19 14:27:05,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:05,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:27:05,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:05,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:27:05,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:27:05,485 INFO L87 Difference]: Start difference. First operand 593 states and 970 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:27:05,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:05,555 INFO L93 Difference]: Finished difference Result 1160 states and 1909 transitions. [2021-11-19 14:27:05,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:27:05,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) Word has length 92 [2021-11-19 14:27:05,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:05,561 INFO L225 Difference]: With dead ends: 1160 [2021-11-19 14:27:05,562 INFO L226 Difference]: Without dead ends: 589 [2021-11-19 14:27:05,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:27:05,566 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 8 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:05,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2765 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:27:05,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-19 14:27:05,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2021-11-19 14:27:05,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 459 states have (on average 1.6623093681917211) internal successors, (763), 481 states have internal predecessors, (763), 102 states have call successors, (102), 27 states have call predecessors, (102), 27 states have return successors, (98), 94 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-19 14:27:05,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 963 transitions. [2021-11-19 14:27:05,596 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 963 transitions. Word has length 92 [2021-11-19 14:27:05,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:05,596 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 963 transitions. [2021-11-19 14:27:05,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:27:05,597 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 963 transitions. [2021-11-19 14:27:05,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 14:27:05,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:05,599 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:05,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:05,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:05,819 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:05,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:05,820 INFO L85 PathProgramCache]: Analyzing trace with hash 890801676, now seen corresponding path program 1 times [2021-11-19 14:27:05,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:05,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123704893] [2021-11-19 14:27:05,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:05,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:05,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:05,822 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:05,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:27:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:06,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:27:06,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:06,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:27:06,596 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:06,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123704893] [2021-11-19 14:27:06,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123704893] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:06,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:27:06,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:27:06,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635205556] [2021-11-19 14:27:06,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:06,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:27:06,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:06,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:27:06,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:27:06,599 INFO L87 Difference]: Start difference. First operand 589 states and 963 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:27:06,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:06,795 INFO L93 Difference]: Finished difference Result 1186 states and 1954 transitions. [2021-11-19 14:27:06,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:27:06,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 93 [2021-11-19 14:27:06,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:06,808 INFO L225 Difference]: With dead ends: 1186 [2021-11-19 14:27:06,809 INFO L226 Difference]: Without dead ends: 589 [2021-11-19 14:27:06,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:27:06,814 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 134 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2573 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:06,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2573 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:27:06,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-19 14:27:06,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2021-11-19 14:27:06,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 459 states have (on average 1.6514161220043573) internal successors, (758), 481 states have internal predecessors, (758), 102 states have call successors, (102), 27 states have call predecessors, (102), 27 states have return successors, (98), 94 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-19 14:27:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 958 transitions. [2021-11-19 14:27:06,841 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 958 transitions. Word has length 93 [2021-11-19 14:27:06,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:06,842 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 958 transitions. [2021-11-19 14:27:06,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:27:06,842 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 958 transitions. [2021-11-19 14:27:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 14:27:06,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:06,844 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:06,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:07,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:07,065 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:07,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:07,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1117985264, now seen corresponding path program 1 times [2021-11-19 14:27:07,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:07,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [510527822] [2021-11-19 14:27:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:07,066 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:07,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:07,066 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:07,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:27:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:07,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:27:07,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:07,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:27:07,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:07,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [510527822] [2021-11-19 14:27:07,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [510527822] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:07,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:27:07,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:27:07,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639305275] [2021-11-19 14:27:07,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:07,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:27:07,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:07,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:27:07,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:27:07,843 INFO L87 Difference]: Start difference. First operand 589 states and 958 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:27:08,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:08,040 INFO L93 Difference]: Finished difference Result 1186 states and 1944 transitions. [2021-11-19 14:27:08,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:27:08,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 95 [2021-11-19 14:27:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:08,047 INFO L225 Difference]: With dead ends: 1186 [2021-11-19 14:27:08,047 INFO L226 Difference]: Without dead ends: 589 [2021-11-19 14:27:08,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:27:08,051 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 128 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2573 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:08,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2573 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:27:08,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-19 14:27:08,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2021-11-19 14:27:08,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 459 states have (on average 1.6405228758169934) internal successors, (753), 481 states have internal predecessors, (753), 102 states have call successors, (102), 27 states have call predecessors, (102), 27 states have return successors, (98), 94 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-19 14:27:08,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 953 transitions. [2021-11-19 14:27:08,076 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 953 transitions. Word has length 95 [2021-11-19 14:27:08,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:08,076 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 953 transitions. [2021-11-19 14:27:08,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:27:08,077 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 953 transitions. [2021-11-19 14:27:08,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 14:27:08,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:08,080 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:08,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:08,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:08,300 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:08,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:08,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1819505812, now seen corresponding path program 1 times [2021-11-19 14:27:08,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:08,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423178982] [2021-11-19 14:27:08,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:08,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:08,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:08,303 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:08,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:27:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:08,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:27:08,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:08,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:09,211 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:27:09,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:09,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423178982] [2021-11-19 14:27:09,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423178982] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:09,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:27:09,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:27:09,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914916177] [2021-11-19 14:27:09,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:09,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:27:09,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:09,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:27:09,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:27:09,214 INFO L87 Difference]: Start difference. First operand 589 states and 953 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:27:09,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:09,392 INFO L93 Difference]: Finished difference Result 1207 states and 1965 transitions. [2021-11-19 14:27:09,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:27:09,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 97 [2021-11-19 14:27:09,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:09,399 INFO L225 Difference]: With dead ends: 1207 [2021-11-19 14:27:09,400 INFO L226 Difference]: Without dead ends: 619 [2021-11-19 14:27:09,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:27:09,406 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 143 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2583 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:09,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2583 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:27:09,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-11-19 14:27:09,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 604. [2021-11-19 14:27:09,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 474 states have (on average 1.620253164556962) internal successors, (768), 495 states have internal predecessors, (768), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:27:09,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 967 transitions. [2021-11-19 14:27:09,430 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 967 transitions. Word has length 97 [2021-11-19 14:27:09,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:09,431 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 967 transitions. [2021-11-19 14:27:09,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:27:09,431 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 967 transitions. [2021-11-19 14:27:09,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 14:27:09,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:09,433 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:09,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:09,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:09,647 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:09,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:09,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1943380244, now seen corresponding path program 1 times [2021-11-19 14:27:09,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:09,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1436068004] [2021-11-19 14:27:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:09,648 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:09,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:09,649 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:09,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:27:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:10,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:27:10,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:10,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:27:10,536 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:10,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1436068004] [2021-11-19 14:27:10,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1436068004] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:10,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:27:10,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 14:27:10,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100786873] [2021-11-19 14:27:10,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:10,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:27:10,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:10,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:27:10,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:27:10,539 INFO L87 Difference]: Start difference. First operand 604 states and 967 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:27:10,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:10,707 INFO L93 Difference]: Finished difference Result 1171 states and 1886 transitions. [2021-11-19 14:27:10,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:27:10,708 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 97 [2021-11-19 14:27:10,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:10,713 INFO L225 Difference]: With dead ends: 1171 [2021-11-19 14:27:10,714 INFO L226 Difference]: Without dead ends: 598 [2021-11-19 14:27:10,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:27:10,718 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 131 mSDsluCounter, 4473 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5399 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:10,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5399 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:27:10,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-19 14:27:10,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 583. [2021-11-19 14:27:10,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 453 states have (on average 1.6136865342163356) internal successors, (731), 474 states have internal predecessors, (731), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:27:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 930 transitions. [2021-11-19 14:27:10,743 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 930 transitions. Word has length 97 [2021-11-19 14:27:10,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:10,744 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 930 transitions. [2021-11-19 14:27:10,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:27:10,745 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 930 transitions. [2021-11-19 14:27:10,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-19 14:27:10,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:10,748 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:10,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:10,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:10,968 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:10,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:10,968 INFO L85 PathProgramCache]: Analyzing trace with hash 886108033, now seen corresponding path program 1 times [2021-11-19 14:27:10,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:10,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782874291] [2021-11-19 14:27:10,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:10,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:10,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:10,970 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:10,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:27:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:11,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:27:11,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:11,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:27:11,769 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:11,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782874291] [2021-11-19 14:27:11,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782874291] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:11,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:27:11,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:27:11,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201985932] [2021-11-19 14:27:11,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:11,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:27:11,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:11,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:27:11,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:27:11,772 INFO L87 Difference]: Start difference. First operand 583 states and 930 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:27:11,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:11,905 INFO L93 Difference]: Finished difference Result 1135 states and 1824 transitions. [2021-11-19 14:27:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:27:11,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 98 [2021-11-19 14:27:11,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:11,912 INFO L225 Difference]: With dead ends: 1135 [2021-11-19 14:27:11,912 INFO L226 Difference]: Without dead ends: 583 [2021-11-19 14:27:11,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:27:11,916 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 69 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2597 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:11,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2597 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:27:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-19 14:27:11,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-19 14:27:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 453 states have (on average 1.6114790286975718) internal successors, (730), 474 states have internal predecessors, (730), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:27:11,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 929 transitions. [2021-11-19 14:27:11,944 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 929 transitions. Word has length 98 [2021-11-19 14:27:11,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:11,944 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 929 transitions. [2021-11-19 14:27:11,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:27:11,945 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 929 transitions. [2021-11-19 14:27:11,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-19 14:27:11,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:11,947 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:11,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:12,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:12,167 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:12,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:12,167 INFO L85 PathProgramCache]: Analyzing trace with hash -663031513, now seen corresponding path program 1 times [2021-11-19 14:27:12,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:12,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1986413549] [2021-11-19 14:27:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:12,168 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:12,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:12,169 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:12,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:27:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:12,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:27:12,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:12,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 14:27:12,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:12,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1986413549] [2021-11-19 14:27:12,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1986413549] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:12,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:27:12,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 14:27:12,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132978472] [2021-11-19 14:27:12,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:12,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:27:12,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:12,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:27:12,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:27:12,974 INFO L87 Difference]: Start difference. First operand 583 states and 929 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:27:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:13,085 INFO L93 Difference]: Finished difference Result 1135 states and 1823 transitions. [2021-11-19 14:27:13,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:27:13,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2021-11-19 14:27:13,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:13,091 INFO L225 Difference]: With dead ends: 1135 [2021-11-19 14:27:13,091 INFO L226 Difference]: Without dead ends: 583 [2021-11-19 14:27:13,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:27:13,095 INFO L933 BasicCegarLoop]: 895 mSDtfsCounter, 67 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2597 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:13,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2597 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:27:13,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-19 14:27:13,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-19 14:27:13,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 453 states have (on average 1.609271523178808) internal successors, (729), 474 states have internal predecessors, (729), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:27:13,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 928 transitions. [2021-11-19 14:27:13,120 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 928 transitions. Word has length 99 [2021-11-19 14:27:13,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:13,121 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 928 transitions. [2021-11-19 14:27:13,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-19 14:27:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 928 transitions. [2021-11-19 14:27:13,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-19 14:27:13,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:13,123 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:13,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:13,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:13,343 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:13,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:13,343 INFO L85 PathProgramCache]: Analyzing trace with hash -965540004, now seen corresponding path program 1 times [2021-11-19 14:27:13,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:13,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657163246] [2021-11-19 14:27:13,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:13,344 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:13,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:13,352 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:13,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:27:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:13,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:27:13,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:13,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:27:14,394 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:14,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657163246] [2021-11-19 14:27:14,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657163246] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:14,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:27:14,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:27:14,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271839460] [2021-11-19 14:27:14,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:14,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:27:14,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:14,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:27:14,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:27:14,396 INFO L87 Difference]: Start difference. First operand 583 states and 928 transitions. Second operand has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:27:14,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:14,633 INFO L93 Difference]: Finished difference Result 1140 states and 1830 transitions. [2021-11-19 14:27:14,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:27:14,635 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 100 [2021-11-19 14:27:14,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:14,640 INFO L225 Difference]: With dead ends: 1140 [2021-11-19 14:27:14,640 INFO L226 Difference]: Without dead ends: 594 [2021-11-19 14:27:14,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:27:14,645 INFO L933 BasicCegarLoop]: 870 mSDtfsCounter, 109 mSDsluCounter, 5156 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6026 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:14,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6026 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:27:14,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-19 14:27:14,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 585. [2021-11-19 14:27:14,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 455 states have (on average 1.6043956043956045) internal successors, (730), 476 states have internal predecessors, (730), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:27:14,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 929 transitions. [2021-11-19 14:27:14,672 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 929 transitions. Word has length 100 [2021-11-19 14:27:14,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:14,672 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 929 transitions. [2021-11-19 14:27:14,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:27:14,673 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 929 transitions. [2021-11-19 14:27:14,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 14:27:14,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:14,675 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:14,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:14,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:14,889 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:14,889 INFO L85 PathProgramCache]: Analyzing trace with hash 581923858, now seen corresponding path program 1 times [2021-11-19 14:27:14,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:14,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422477773] [2021-11-19 14:27:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:14,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:14,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:14,892 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:14,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:27:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:15,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:27:15,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:27:15,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:15,884 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:27:15,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:15,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422477773] [2021-11-19 14:27:15,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422477773] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:15,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:27:15,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 14:27:15,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379946099] [2021-11-19 14:27:15,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:15,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:27:15,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:15,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:27:15,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:27:15,887 INFO L87 Difference]: Start difference. First operand 585 states and 929 transitions. Second operand has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:27:16,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:16,109 INFO L93 Difference]: Finished difference Result 1132 states and 1811 transitions. [2021-11-19 14:27:16,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:27:16,111 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 101 [2021-11-19 14:27:16,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:16,116 INFO L225 Difference]: With dead ends: 1132 [2021-11-19 14:27:16,116 INFO L226 Difference]: Without dead ends: 590 [2021-11-19 14:27:16,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:27:16,120 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 77 mSDsluCounter, 5162 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6034 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:16,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 6034 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:27:16,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-11-19 14:27:16,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 587. [2021-11-19 14:27:16,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 457 states have (on average 1.599562363238512) internal successors, (731), 478 states have internal predecessors, (731), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:27:16,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 930 transitions. [2021-11-19 14:27:16,144 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 930 transitions. Word has length 101 [2021-11-19 14:27:16,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:16,144 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 930 transitions. [2021-11-19 14:27:16,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-19 14:27:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 930 transitions. [2021-11-19 14:27:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 14:27:16,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:16,148 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:16,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:16,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:16,364 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:16,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:16,364 INFO L85 PathProgramCache]: Analyzing trace with hash 27937254, now seen corresponding path program 1 times [2021-11-19 14:27:16,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:16,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248660360] [2021-11-19 14:27:16,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:16,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:16,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:16,365 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:16,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:27:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:16,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:27:16,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:27:16,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:27:17,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:17,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248660360] [2021-11-19 14:27:17,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248660360] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:27:17,212 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:27:17,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:27:17,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786457244] [2021-11-19 14:27:17,213 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:17,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:27:17,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:17,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:27:17,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:27:17,215 INFO L87 Difference]: Start difference. First operand 587 states and 930 transitions. Second operand has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:27:17,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:17,381 INFO L93 Difference]: Finished difference Result 1078 states and 1738 transitions. [2021-11-19 14:27:17,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:27:17,383 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 102 [2021-11-19 14:27:17,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:17,388 INFO L225 Difference]: With dead ends: 1078 [2021-11-19 14:27:17,388 INFO L226 Difference]: Without dead ends: 580 [2021-11-19 14:27:17,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:27:17,392 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 55 mSDsluCounter, 6068 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 6952 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:17,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 6952 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:27:17,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-19 14:27:17,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-11-19 14:27:17,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 450 states have (on average 1.6066666666666667) internal successors, (723), 471 states have internal predecessors, (723), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:27:17,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 922 transitions. [2021-11-19 14:27:17,414 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 922 transitions. Word has length 102 [2021-11-19 14:27:17,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:17,414 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 922 transitions. [2021-11-19 14:27:17,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:27:17,415 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 922 transitions. [2021-11-19 14:27:17,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 14:27:17,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:17,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:17,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:17,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:17,637 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:17,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:17,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2098890538, now seen corresponding path program 1 times [2021-11-19 14:27:17,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:17,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162902412] [2021-11-19 14:27:17,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:17,638 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:17,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:17,639 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:17,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:27:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:17,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:27:17,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:27:18,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:27:18,421 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:18,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162902412] [2021-11-19 14:27:18,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162902412] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:27:18,422 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:27:18,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:27:18,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320369064] [2021-11-19 14:27:18,422 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:18,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:27:18,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:18,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:27:18,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:27:18,424 INFO L87 Difference]: Start difference. First operand 580 states and 922 transitions. Second operand has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:27:18,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:18,545 INFO L93 Difference]: Finished difference Result 1083 states and 1752 transitions. [2021-11-19 14:27:18,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:27:18,546 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 103 [2021-11-19 14:27:18,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:18,551 INFO L225 Difference]: With dead ends: 1083 [2021-11-19 14:27:18,551 INFO L226 Difference]: Without dead ends: 577 [2021-11-19 14:27:18,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:27:18,555 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 170 mSDsluCounter, 4362 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 5238 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:18,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 5238 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:27:18,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-19 14:27:18,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-19 14:27:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 447 states have (on average 1.6062639821029083) internal successors, (718), 468 states have internal predecessors, (718), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:27:18,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 917 transitions. [2021-11-19 14:27:18,576 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 917 transitions. Word has length 103 [2021-11-19 14:27:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:18,576 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 917 transitions. [2021-11-19 14:27:18,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:27:18,577 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 917 transitions. [2021-11-19 14:27:18,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-19 14:27:18,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:18,579 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:18,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:18,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:18,793 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:18,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:18,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2018293078, now seen corresponding path program 1 times [2021-11-19 14:27:18,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:18,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797150800] [2021-11-19 14:27:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:18,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:18,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:18,795 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:18,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:27:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:19,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:27:19,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:27:19,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:27:19,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:19,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797150800] [2021-11-19 14:27:19,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797150800] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:27:19,659 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:27:19,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:27:19,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554524570] [2021-11-19 14:27:19,659 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:19,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:27:19,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:19,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:27:19,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:27:19,661 INFO L87 Difference]: Start difference. First operand 577 states and 917 transitions. Second operand has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 14:27:19,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:19,810 INFO L93 Difference]: Finished difference Result 1080 states and 1747 transitions. [2021-11-19 14:27:19,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:27:19,811 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 103 [2021-11-19 14:27:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:19,817 INFO L225 Difference]: With dead ends: 1080 [2021-11-19 14:27:19,817 INFO L226 Difference]: Without dead ends: 569 [2021-11-19 14:27:19,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:27:19,821 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 105 mSDsluCounter, 5145 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 6020 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:19,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 6020 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:27:19,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-19 14:27:19,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2021-11-19 14:27:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 439 states have (on average 1.6104783599088839) internal successors, (707), 460 states have internal predecessors, (707), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:27:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 906 transitions. [2021-11-19 14:27:19,846 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 906 transitions. Word has length 103 [2021-11-19 14:27:19,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:19,847 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 906 transitions. [2021-11-19 14:27:19,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 3 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 14:27:19,847 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 906 transitions. [2021-11-19 14:27:19,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 14:27:19,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:19,849 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:19,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:20,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:20,069 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:20,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:20,070 INFO L85 PathProgramCache]: Analyzing trace with hash -408190454, now seen corresponding path program 1 times [2021-11-19 14:27:20,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:20,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708286731] [2021-11-19 14:27:20,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:20,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:20,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:20,071 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:20,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:27:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:20,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:27:20,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:27:20,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:27:21,027 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:21,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708286731] [2021-11-19 14:27:21,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708286731] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:27:21,028 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:27:21,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:27:21,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302769696] [2021-11-19 14:27:21,028 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:21,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:27:21,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:21,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:27:21,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:27:21,030 INFO L87 Difference]: Start difference. First operand 569 states and 906 transitions. Second operand has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:27:21,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:21,232 INFO L93 Difference]: Finished difference Result 1066 states and 1725 transitions. [2021-11-19 14:27:21,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:27:21,233 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 104 [2021-11-19 14:27:21,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:21,238 INFO L225 Difference]: With dead ends: 1066 [2021-11-19 14:27:21,238 INFO L226 Difference]: Without dead ends: 569 [2021-11-19 14:27:21,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:27:21,242 INFO L933 BasicCegarLoop]: 871 mSDtfsCounter, 101 mSDsluCounter, 6008 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 6879 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:21,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 6879 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:27:21,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-19 14:27:21,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2021-11-19 14:27:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 439 states have (on average 1.6082004555808656) internal successors, (706), 460 states have internal predecessors, (706), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:27:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 905 transitions. [2021-11-19 14:27:21,269 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 905 transitions. Word has length 104 [2021-11-19 14:27:21,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:21,270 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 905 transitions. [2021-11-19 14:27:21,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:27:21,270 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 905 transitions. [2021-11-19 14:27:21,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-19 14:27:21,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:21,272 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:21,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:21,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:21,485 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:21,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:21,485 INFO L85 PathProgramCache]: Analyzing trace with hash 421063636, now seen corresponding path program 1 times [2021-11-19 14:27:21,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:21,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567147378] [2021-11-19 14:27:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:21,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:21,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:21,487 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:21,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:27:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:21,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:27:21,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:27:21,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:22,430 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:27:22,430 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:22,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567147378] [2021-11-19 14:27:22,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567147378] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:27:22,431 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:27:22,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:27:22,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715857632] [2021-11-19 14:27:22,431 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:22,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:27:22,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:22,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:27:22,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:27:22,433 INFO L87 Difference]: Start difference. First operand 569 states and 905 transitions. Second operand has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:27:22,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:22,615 INFO L93 Difference]: Finished difference Result 1110 states and 1782 transitions. [2021-11-19 14:27:22,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:27:22,617 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 105 [2021-11-19 14:27:22,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:22,622 INFO L225 Difference]: With dead ends: 1110 [2021-11-19 14:27:22,622 INFO L226 Difference]: Without dead ends: 566 [2021-11-19 14:27:22,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:27:22,626 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 143 mSDsluCounter, 6808 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 7667 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:22,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 7667 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:27:22,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-19 14:27:22,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2021-11-19 14:27:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 436 states have (on average 1.6009174311926606) internal successors, (698), 457 states have internal predecessors, (698), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:27:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 897 transitions. [2021-11-19 14:27:22,647 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 897 transitions. Word has length 105 [2021-11-19 14:27:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:22,647 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 897 transitions. [2021-11-19 14:27:22,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.636363636363637) internal successors, (117), 11 states have internal predecessors, (117), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:27:22,648 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 897 transitions. [2021-11-19 14:27:22,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:27:22,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:22,650 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:22,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:22,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:22,869 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:22,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:22,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1885346545, now seen corresponding path program 1 times [2021-11-19 14:27:22,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:22,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062703241] [2021-11-19 14:27:22,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:22,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:22,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:22,871 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:22,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:27:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:23,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:27:23,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:27:23,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:27:23,742 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:23,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062703241] [2021-11-19 14:27:23,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062703241] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:27:23,742 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:27:23,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:27:23,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428722735] [2021-11-19 14:27:23,742 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:23,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:27:23,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:23,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:27:23,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:27:23,744 INFO L87 Difference]: Start difference. First operand 566 states and 897 transitions. Second operand has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:27:23,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:23,960 INFO L93 Difference]: Finished difference Result 1057 states and 1705 transitions. [2021-11-19 14:27:23,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:27:23,962 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 106 [2021-11-19 14:27:23,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:23,965 INFO L225 Difference]: With dead ends: 1057 [2021-11-19 14:27:23,965 INFO L226 Difference]: Without dead ends: 566 [2021-11-19 14:27:23,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:27:23,968 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 51 mSDsluCounter, 7655 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 8515 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:23,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 8515 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:27:23,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-19 14:27:23,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2021-11-19 14:27:23,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 436 states have (on average 1.598623853211009) internal successors, (697), 457 states have internal predecessors, (697), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:27:23,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 896 transitions. [2021-11-19 14:27:23,988 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 896 transitions. Word has length 106 [2021-11-19 14:27:23,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:23,988 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 896 transitions. [2021-11-19 14:27:23,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 11.0) internal successors, (121), 11 states have internal predecessors, (121), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:27:23,989 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 896 transitions. [2021-11-19 14:27:23,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 14:27:23,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:23,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:24,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-19 14:27:24,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:24,205 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:24,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:24,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1223713179, now seen corresponding path program 1 times [2021-11-19 14:27:24,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:24,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171755741] [2021-11-19 14:27:24,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:24,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:24,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:24,207 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:24,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:27:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:24,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:27:24,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:27:24,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 14:27:25,071 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:25,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171755741] [2021-11-19 14:27:25,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171755741] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:27:25,072 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:27:25,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:27:25,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136354314] [2021-11-19 14:27:25,072 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:25,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:27:25,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:25,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:27:25,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:27:25,074 INFO L87 Difference]: Start difference. First operand 566 states and 896 transitions. Second operand has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:27:25,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:25,261 INFO L93 Difference]: Finished difference Result 1095 states and 1750 transitions. [2021-11-19 14:27:25,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:27:25,262 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 107 [2021-11-19 14:27:25,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:25,267 INFO L225 Difference]: With dead ends: 1095 [2021-11-19 14:27:25,267 INFO L226 Difference]: Without dead ends: 563 [2021-11-19 14:27:25,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:27:25,271 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 76 mSDsluCounter, 7638 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 8496 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:25,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 8496 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:27:25,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-19 14:27:25,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2021-11-19 14:27:25,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 433 states have (on average 1.5912240184757507) internal successors, (689), 454 states have internal predecessors, (689), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:27:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 888 transitions. [2021-11-19 14:27:25,291 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 888 transitions. Word has length 107 [2021-11-19 14:27:25,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:25,291 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 888 transitions. [2021-11-19 14:27:25,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 11.181818181818182) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-19 14:27:25,292 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 888 transitions. [2021-11-19 14:27:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-19 14:27:25,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:25,294 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:25,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:25,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:25,513 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:25,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:25,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1018685140, now seen corresponding path program 1 times [2021-11-19 14:27:25,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:25,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096032325] [2021-11-19 14:27:25,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:25,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:25,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:25,515 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:25,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:27:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:25,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 914 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:27:25,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:27:26,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:27:26,911 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:26,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096032325] [2021-11-19 14:27:26,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096032325] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:27:26,912 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:27:26,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2021-11-19 14:27:26,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616164780] [2021-11-19 14:27:26,912 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:26,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:27:26,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:26,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:27:26,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:27:26,913 INFO L87 Difference]: Start difference. First operand 563 states and 888 transitions. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-19 14:27:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:33,435 INFO L93 Difference]: Finished difference Result 2713 states and 4483 transitions. [2021-11-19 14:27:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 14:27:33,436 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 108 [2021-11-19 14:27:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:33,451 INFO L225 Difference]: With dead ends: 2713 [2021-11-19 14:27:33,451 INFO L226 Difference]: Without dead ends: 2230 [2021-11-19 14:27:33,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:27:33,456 INFO L933 BasicCegarLoop]: 1540 mSDtfsCounter, 4998 mSDsluCounter, 1819 mSDsCounter, 0 mSdLazyCounter, 4497 mSolverCounterSat, 1360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5182 SdHoareTripleChecker+Valid, 3359 SdHoareTripleChecker+Invalid, 5857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1360 IncrementalHoareTripleChecker+Valid, 4497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:33,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5182 Valid, 3359 Invalid, 5857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1360 Valid, 4497 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-11-19 14:27:33,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-11-19 14:27:33,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2048. [2021-11-19 14:27:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 1565 states have (on average 1.6492012779552716) internal successors, (2581), 1630 states have internal predecessors, (2581), 398 states have call successors, (398), 81 states have call predecessors, (398), 84 states have return successors, (406), 363 states have call predecessors, (406), 393 states have call successors, (406) [2021-11-19 14:27:33,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3385 transitions. [2021-11-19 14:27:33,562 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3385 transitions. Word has length 108 [2021-11-19 14:27:33,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:33,563 INFO L470 AbstractCegarLoop]: Abstraction has 2048 states and 3385 transitions. [2021-11-19 14:27:33,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 8 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-11-19 14:27:33,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3385 transitions. [2021-11-19 14:27:33,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-19 14:27:33,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:33,570 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:33,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:33,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:33,789 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:33,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:33,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1628897051, now seen corresponding path program 1 times [2021-11-19 14:27:33,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:33,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422727751] [2021-11-19 14:27:33,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:33,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:33,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:33,791 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:33,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:27:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:34,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:27:34,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:27:34,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:27:35,123 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:35,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422727751] [2021-11-19 14:27:35,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422727751] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:27:35,123 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:27:35,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:27:35,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103754182] [2021-11-19 14:27:35,124 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:35,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:27:35,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:35,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:27:35,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:27:35,126 INFO L87 Difference]: Start difference. First operand 2048 states and 3385 transitions. Second operand has 13 states, 13 states have (on average 12.153846153846153) internal successors, (158), 11 states have internal predecessors, (158), 7 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-19 14:27:42,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:42,499 INFO L93 Difference]: Finished difference Result 5415 states and 8990 transitions. [2021-11-19 14:27:42,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 14:27:42,501 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.153846153846153) internal successors, (158), 11 states have internal predecessors, (158), 7 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) Word has length 160 [2021-11-19 14:27:42,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:42,523 INFO L225 Difference]: With dead ends: 5415 [2021-11-19 14:27:42,523 INFO L226 Difference]: Without dead ends: 3447 [2021-11-19 14:27:42,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-11-19 14:27:42,539 INFO L933 BasicCegarLoop]: 1784 mSDtfsCounter, 3927 mSDsluCounter, 3424 mSDsCounter, 0 mSdLazyCounter, 7756 mSolverCounterSat, 1641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4017 SdHoareTripleChecker+Valid, 5208 SdHoareTripleChecker+Invalid, 9397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1641 IncrementalHoareTripleChecker+Valid, 7756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:42,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4017 Valid, 5208 Invalid, 9397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1641 Valid, 7756 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-11-19 14:27:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3447 states. [2021-11-19 14:27:42,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3447 to 2981. [2021-11-19 14:27:42,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2226 states have (on average 1.6127583108715184) internal successors, (3590), 2317 states have internal predecessors, (3590), 624 states have call successors, (624), 114 states have call predecessors, (624), 130 states have return successors, (660), 582 states have call predecessors, (660), 619 states have call successors, (660) [2021-11-19 14:27:42,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 4874 transitions. [2021-11-19 14:27:42,747 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 4874 transitions. Word has length 160 [2021-11-19 14:27:42,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:42,747 INFO L470 AbstractCegarLoop]: Abstraction has 2981 states and 4874 transitions. [2021-11-19 14:27:42,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.153846153846153) internal successors, (158), 11 states have internal predecessors, (158), 7 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-19 14:27:42,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 4874 transitions. [2021-11-19 14:27:42,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-19 14:27:42,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:42,753 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:42,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:42,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:42,969 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:42,969 INFO L85 PathProgramCache]: Analyzing trace with hash 594199647, now seen corresponding path program 1 times [2021-11-19 14:27:42,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:42,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [809324121] [2021-11-19 14:27:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:42,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:42,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:42,971 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:42,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:27:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:43,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:27:43,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:27:43,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:27:44,180 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:44,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [809324121] [2021-11-19 14:27:44,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [809324121] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:44,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:27:44,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:27:44,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153994359] [2021-11-19 14:27:44,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:44,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:27:44,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:44,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:27:44,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:27:44,190 INFO L87 Difference]: Start difference. First operand 2981 states and 4874 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:27:45,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:45,004 INFO L93 Difference]: Finished difference Result 5922 states and 9889 transitions. [2021-11-19 14:27:45,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:27:45,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 161 [2021-11-19 14:27:45,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:45,021 INFO L225 Difference]: With dead ends: 5922 [2021-11-19 14:27:45,021 INFO L226 Difference]: Without dead ends: 3021 [2021-11-19 14:27:45,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:27:45,037 INFO L933 BasicCegarLoop]: 845 mSDtfsCounter, 792 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 2166 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:45,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 2166 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:27:45,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3021 states. [2021-11-19 14:27:45,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3021 to 3021. [2021-11-19 14:27:45,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 2256 states have (on average 1.6046099290780143) internal successors, (3620), 2347 states have internal predecessors, (3620), 624 states have call successors, (624), 124 states have call predecessors, (624), 140 states have return successors, (666), 582 states have call predecessors, (666), 619 states have call successors, (666) [2021-11-19 14:27:45,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 4910 transitions. [2021-11-19 14:27:45,205 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 4910 transitions. Word has length 161 [2021-11-19 14:27:45,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:45,206 INFO L470 AbstractCegarLoop]: Abstraction has 3021 states and 4910 transitions. [2021-11-19 14:27:45,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:27:45,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 4910 transitions. [2021-11-19 14:27:45,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-19 14:27:45,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:45,212 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:45,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-19 14:27:45,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:45,429 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:45,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:45,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1903542457, now seen corresponding path program 1 times [2021-11-19 14:27:45,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:45,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647371364] [2021-11-19 14:27:45,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:45,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:45,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:45,431 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:45,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:27:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:45,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:27:45,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:27:46,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:27:46,615 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:46,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647371364] [2021-11-19 14:27:46,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647371364] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:46,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:27:46,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:27:46,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815910770] [2021-11-19 14:27:46,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:46,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:27:46,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:46,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:27:46,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:27:46,616 INFO L87 Difference]: Start difference. First operand 3021 states and 4910 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:27:47,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:47,355 INFO L93 Difference]: Finished difference Result 6012 states and 9961 transitions. [2021-11-19 14:27:47,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:27:47,356 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 163 [2021-11-19 14:27:47,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:47,380 INFO L225 Difference]: With dead ends: 6012 [2021-11-19 14:27:47,380 INFO L226 Difference]: Without dead ends: 3071 [2021-11-19 14:27:47,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:27:47,390 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 780 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 2167 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:47,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [797 Valid, 2167 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:27:47,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-11-19 14:27:47,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 3071. [2021-11-19 14:27:47,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3071 states, 2296 states have (on average 1.5940766550522647) internal successors, (3660), 2387 states have internal predecessors, (3660), 624 states have call successors, (624), 134 states have call predecessors, (624), 150 states have return successors, (672), 582 states have call predecessors, (672), 619 states have call successors, (672) [2021-11-19 14:27:47,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3071 states to 3071 states and 4956 transitions. [2021-11-19 14:27:47,607 INFO L78 Accepts]: Start accepts. Automaton has 3071 states and 4956 transitions. Word has length 163 [2021-11-19 14:27:47,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:47,608 INFO L470 AbstractCegarLoop]: Abstraction has 3071 states and 4956 transitions. [2021-11-19 14:27:47,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:27:47,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3071 states and 4956 transitions. [2021-11-19 14:27:47,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-19 14:27:47,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:47,613 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:47,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:47,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:47,834 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:47,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:47,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1228195551, now seen corresponding path program 1 times [2021-11-19 14:27:47,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:47,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173779627] [2021-11-19 14:27:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:47,836 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:47,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:47,836 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:47,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 14:27:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:48,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:27:48,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:27:48,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:27:49,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:49,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173779627] [2021-11-19 14:27:49,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173779627] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:49,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:27:49,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:27:49,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70623012] [2021-11-19 14:27:49,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:49,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:27:49,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:49,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:27:49,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:27:49,021 INFO L87 Difference]: Start difference. First operand 3071 states and 4956 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:27:49,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:49,910 INFO L93 Difference]: Finished difference Result 6122 states and 10053 transitions. [2021-11-19 14:27:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:27:49,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 165 [2021-11-19 14:27:49,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:49,941 INFO L225 Difference]: With dead ends: 6122 [2021-11-19 14:27:49,942 INFO L226 Difference]: Without dead ends: 3131 [2021-11-19 14:27:49,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:27:49,958 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 781 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 2167 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:49,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 2167 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:27:49,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2021-11-19 14:27:50,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 3131. [2021-11-19 14:27:50,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 2346 states have (on average 1.5814151747655585) internal successors, (3710), 2437 states have internal predecessors, (3710), 624 states have call successors, (624), 144 states have call predecessors, (624), 160 states have return successors, (678), 582 states have call predecessors, (678), 619 states have call successors, (678) [2021-11-19 14:27:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 5012 transitions. [2021-11-19 14:27:50,134 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 5012 transitions. Word has length 165 [2021-11-19 14:27:50,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:50,136 INFO L470 AbstractCegarLoop]: Abstraction has 3131 states and 5012 transitions. [2021-11-19 14:27:50,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:27:50,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 5012 transitions. [2021-11-19 14:27:50,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-19 14:27:50,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:50,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:50,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:50,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:50,364 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:50,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:50,364 INFO L85 PathProgramCache]: Analyzing trace with hash -887593935, now seen corresponding path program 1 times [2021-11-19 14:27:50,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:50,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564895573] [2021-11-19 14:27:50,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:50,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:50,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:50,367 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:50,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-19 14:27:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:50,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:27:50,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:27:51,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:27:51,727 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:51,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564895573] [2021-11-19 14:27:51,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564895573] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:27:51,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:27:51,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:27:51,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292272386] [2021-11-19 14:27:51,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:51,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:27:51,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:51,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:27:51,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:27:51,729 INFO L87 Difference]: Start difference. First operand 3131 states and 5012 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:27:52,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:52,511 INFO L93 Difference]: Finished difference Result 6252 states and 10165 transitions. [2021-11-19 14:27:52,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:27:52,512 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 167 [2021-11-19 14:27:52,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:52,530 INFO L225 Difference]: With dead ends: 6252 [2021-11-19 14:27:52,531 INFO L226 Difference]: Without dead ends: 3201 [2021-11-19 14:27:52,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:27:52,544 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 785 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 2167 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:52,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 2167 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:27:52,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-11-19 14:27:52,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 3201. [2021-11-19 14:27:52,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 2406 states have (on average 1.5669160432252702) internal successors, (3770), 2497 states have internal predecessors, (3770), 624 states have call successors, (624), 154 states have call predecessors, (624), 170 states have return successors, (684), 582 states have call predecessors, (684), 619 states have call successors, (684) [2021-11-19 14:27:52,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 5078 transitions. [2021-11-19 14:27:52,706 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 5078 transitions. Word has length 167 [2021-11-19 14:27:52,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:52,707 INFO L470 AbstractCegarLoop]: Abstraction has 3201 states and 5078 transitions. [2021-11-19 14:27:52,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-19 14:27:52,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 5078 transitions. [2021-11-19 14:27:52,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-19 14:27:52,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:52,713 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:52,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:52,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:52,934 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:52,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:52,935 INFO L85 PathProgramCache]: Analyzing trace with hash 65419103, now seen corresponding path program 1 times [2021-11-19 14:27:52,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:52,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553702862] [2021-11-19 14:27:52,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:52,935 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:52,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:52,936 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:52,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:27:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:53,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 14:27:53,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:27:53,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:54,877 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:27:54,877 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:27:54,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553702862] [2021-11-19 14:27:54,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553702862] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:27:54,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [478870834] [2021-11-19 14:27:54,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:54,878 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:27:54,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:27:54,886 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:27:54,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-19 14:27:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:55,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:27:55,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:27:55,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:27:56,448 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:27:56,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [478870834] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:27:56,449 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:27:56,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 14:27:56,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866465246] [2021-11-19 14:27:56,449 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:27:56,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:27:56,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:27:56,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:27:56,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:27:56,451 INFO L87 Difference]: Start difference. First operand 3201 states and 5078 transitions. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:27:57,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:27:57,184 INFO L93 Difference]: Finished difference Result 6273 states and 10020 transitions. [2021-11-19 14:27:57,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:27:57,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 169 [2021-11-19 14:27:57,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:27:57,203 INFO L225 Difference]: With dead ends: 6273 [2021-11-19 14:27:57,203 INFO L226 Difference]: Without dead ends: 3152 [2021-11-19 14:27:57,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:27:57,216 INFO L933 BasicCegarLoop]: 769 mSDtfsCounter, 1895 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1895 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:27:57,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1895 Valid, 783 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:27:57,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2021-11-19 14:27:57,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 3152. [2021-11-19 14:27:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3152 states, 2374 states have (on average 1.5606571187868576) internal successors, (3705), 2464 states have internal predecessors, (3705), 607 states have call successors, (607), 154 states have call predecessors, (607), 170 states have return successors, (668), 566 states have call predecessors, (668), 603 states have call successors, (668) [2021-11-19 14:27:57,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 4980 transitions. [2021-11-19 14:27:57,392 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 4980 transitions. Word has length 169 [2021-11-19 14:27:57,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:27:57,392 INFO L470 AbstractCegarLoop]: Abstraction has 3152 states and 4980 transitions. [2021-11-19 14:27:57,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:27:57,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 4980 transitions. [2021-11-19 14:27:57,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-19 14:27:57,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:27:57,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:27:57,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:57,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:27:57,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:27:57,809 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:27:57,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:27:57,810 INFO L85 PathProgramCache]: Analyzing trace with hash 2027705661, now seen corresponding path program 1 times [2021-11-19 14:27:57,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:27:57,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329953674] [2021-11-19 14:27:57,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:27:57,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:27:57,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:27:57,812 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:27:57,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-19 14:27:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:27:58,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 14:27:58,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:27:58,913 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:27:58,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:28:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:28:00,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:28:00,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329953674] [2021-11-19 14:28:00,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329953674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:28:00,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [134454135] [2021-11-19 14:28:00,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:00,066 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:28:00,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:28:00,090 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:28:00,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-19 14:28:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:00,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 14:28:00,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:28:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:28:00,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:28:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:28:01,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [134454135] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:28:01,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729486938] [2021-11-19 14:28:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:01,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:28:01,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:28:01,849 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:28:01,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-19 14:28:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:02,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 14:28:02,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:28:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:28:02,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:28:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:28:03,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729486938] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:28:03,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:28:03,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-19 14:28:03,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032098147] [2021-11-19 14:28:03,577 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:28:03,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 14:28:03,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:28:03,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 14:28:03,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:28:03,579 INFO L87 Difference]: Start difference. First operand 3152 states and 4980 transitions. Second operand has 18 states, 18 states have (on average 11.277777777777779) internal successors, (203), 14 states have internal predecessors, (203), 8 states have call successors, (35), 5 states have call predecessors, (35), 10 states have return successors, (36), 12 states have call predecessors, (36), 7 states have call successors, (36) [2021-11-19 14:28:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:10,923 INFO L93 Difference]: Finished difference Result 10889 states and 17739 transitions. [2021-11-19 14:28:10,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:28:10,925 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 11.277777777777779) internal successors, (203), 14 states have internal predecessors, (203), 8 states have call successors, (35), 5 states have call predecessors, (35), 10 states have return successors, (36), 12 states have call predecessors, (36), 7 states have call successors, (36) Word has length 170 [2021-11-19 14:28:10,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:11,053 INFO L225 Difference]: With dead ends: 10889 [2021-11-19 14:28:11,053 INFO L226 Difference]: Without dead ends: 7817 [2021-11-19 14:28:11,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 1000 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-11-19 14:28:11,069 INFO L933 BasicCegarLoop]: 1693 mSDtfsCounter, 6396 mSDsluCounter, 4266 mSDsCounter, 0 mSdLazyCounter, 7837 mSolverCounterSat, 2592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6475 SdHoareTripleChecker+Valid, 5959 SdHoareTripleChecker+Invalid, 10429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2592 IncrementalHoareTripleChecker+Valid, 7837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:11,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6475 Valid, 5959 Invalid, 10429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2592 Valid, 7837 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-11-19 14:28:11,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7817 states. [2021-11-19 14:28:11,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7817 to 7006. [2021-11-19 14:28:11,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7006 states, 5217 states have (on average 1.5597086448150277) internal successors, (8137), 5411 states have internal predecessors, (8137), 1416 states have call successors, (1416), 301 states have call predecessors, (1416), 372 states have return successors, (1701), 1374 states have call predecessors, (1701), 1412 states have call successors, (1701) [2021-11-19 14:28:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7006 states to 7006 states and 11254 transitions. [2021-11-19 14:28:11,556 INFO L78 Accepts]: Start accepts. Automaton has 7006 states and 11254 transitions. Word has length 170 [2021-11-19 14:28:11,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:11,556 INFO L470 AbstractCegarLoop]: Abstraction has 7006 states and 11254 transitions. [2021-11-19 14:28:11,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.277777777777779) internal successors, (203), 14 states have internal predecessors, (203), 8 states have call successors, (35), 5 states have call predecessors, (35), 10 states have return successors, (36), 12 states have call predecessors, (36), 7 states have call successors, (36) [2021-11-19 14:28:11,557 INFO L276 IsEmpty]: Start isEmpty. Operand 7006 states and 11254 transitions. [2021-11-19 14:28:11,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-19 14:28:11,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:11,565 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:28:11,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-19 14:28:11,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-19 14:28:11,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-11-19 14:28:12,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:28:12,185 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:12,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:12,186 INFO L85 PathProgramCache]: Analyzing trace with hash 969850946, now seen corresponding path program 1 times [2021-11-19 14:28:12,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:28:12,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286255915] [2021-11-19 14:28:12,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:12,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:28:12,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:28:12,188 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:28:12,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-19 14:28:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:12,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:28:12,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:28:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:28:12,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:28:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:28:13,401 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:28:13,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286255915] [2021-11-19 14:28:13,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286255915] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:13,401 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:13,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 14:28:13,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849531164] [2021-11-19 14:28:13,401 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:13,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:28:13,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:28:13,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:28:13,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:28:13,403 INFO L87 Difference]: Start difference. First operand 7006 states and 11254 transitions. Second operand has 10 states, 9 states have (on average 21.22222222222222) internal successors, (191), 9 states have internal predecessors, (191), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-19 14:28:13,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:13,693 INFO L93 Difference]: Finished difference Result 10056 states and 16100 transitions. [2021-11-19 14:28:13,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:28:13,694 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 21.22222222222222) internal successors, (191), 9 states have internal predecessors, (191), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 172 [2021-11-19 14:28:13,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:13,709 INFO L225 Difference]: With dead ends: 10056 [2021-11-19 14:28:13,709 INFO L226 Difference]: Without dead ends: 3120 [2021-11-19 14:28:13,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:28:13,733 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 82 mSDsluCounter, 5806 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 6647 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:13,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 6647 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:28:13,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2021-11-19 14:28:13,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 3120. [2021-11-19 14:28:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 2354 states have (on average 1.5590484282073067) internal successors, (3670), 2444 states have internal predecessors, (3670), 595 states have call successors, (595), 154 states have call predecessors, (595), 170 states have return successors, (656), 554 states have call predecessors, (656), 591 states have call successors, (656) [2021-11-19 14:28:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 4921 transitions. [2021-11-19 14:28:13,919 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 4921 transitions. Word has length 172 [2021-11-19 14:28:13,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:13,920 INFO L470 AbstractCegarLoop]: Abstraction has 3120 states and 4921 transitions. [2021-11-19 14:28:13,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 21.22222222222222) internal successors, (191), 9 states have internal predecessors, (191), 3 states have call successors, (29), 2 states have call predecessors, (29), 4 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-19 14:28:13,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 4921 transitions. [2021-11-19 14:28:13,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-19 14:28:13,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:13,925 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:28:13,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-19 14:28:14,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:28:14,141 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:14,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:14,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1407399397, now seen corresponding path program 1 times [2021-11-19 14:28:14,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:28:14,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670803271] [2021-11-19 14:28:14,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:14,142 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:28:14,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:28:14,143 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:28:14,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-19 14:28:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:14,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 14:28:14,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:28:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:28:15,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:28:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:28:15,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:28:15,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670803271] [2021-11-19 14:28:15,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670803271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:28:15,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [43237456] [2021-11-19 14:28:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:15,909 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:28:15,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:28:15,909 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:28:15,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-19 14:28:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:16,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 14:28:16,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:28:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:28:16,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:28:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:28:17,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [43237456] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:28:17,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733095110] [2021-11-19 14:28:17,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:17,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:28:17,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:28:17,555 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:28:17,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-19 14:28:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:17,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 14:28:17,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:28:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:28:18,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:28:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:28:19,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733095110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:28:19,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:28:19,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-19 14:28:19,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843738134] [2021-11-19 14:28:19,097 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:28:19,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:28:19,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:28:19,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:28:19,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:28:19,098 INFO L87 Difference]: Start difference. First operand 3120 states and 4921 transitions. Second operand has 14 states, 14 states have (on average 14.5) internal successors, (203), 12 states have internal predecessors, (203), 8 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (36), 10 states have call predecessors, (36), 7 states have call successors, (36) [2021-11-19 14:28:21,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:21,560 INFO L93 Difference]: Finished difference Result 6206 states and 9890 transitions. [2021-11-19 14:28:21,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:28:21,560 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.5) internal successors, (203), 12 states have internal predecessors, (203), 8 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (36), 10 states have call predecessors, (36), 7 states have call successors, (36) Word has length 176 [2021-11-19 14:28:21,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:21,580 INFO L225 Difference]: With dead ends: 6206 [2021-11-19 14:28:21,580 INFO L226 Difference]: Without dead ends: 3164 [2021-11-19 14:28:21,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1056 GetRequests, 1040 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:28:21,592 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 1920 mSDsluCounter, 1842 mSDsCounter, 0 mSdLazyCounter, 3405 mSolverCounterSat, 556 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1920 SdHoareTripleChecker+Valid, 2598 SdHoareTripleChecker+Invalid, 3961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 556 IncrementalHoareTripleChecker+Valid, 3405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:21,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1920 Valid, 2598 Invalid, 3961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [556 Valid, 3405 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:28:21,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2021-11-19 14:28:21,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 3144. [2021-11-19 14:28:21,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3144 states, 2372 states have (on average 1.554806070826307) internal successors, (3688), 2462 states have internal predecessors, (3688), 595 states have call successors, (595), 154 states have call predecessors, (595), 176 states have return successors, (680), 560 states have call predecessors, (680), 591 states have call successors, (680) [2021-11-19 14:28:21,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3144 states to 3144 states and 4963 transitions. [2021-11-19 14:28:21,899 INFO L78 Accepts]: Start accepts. Automaton has 3144 states and 4963 transitions. Word has length 176 [2021-11-19 14:28:21,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:21,900 INFO L470 AbstractCegarLoop]: Abstraction has 3144 states and 4963 transitions. [2021-11-19 14:28:21,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.5) internal successors, (203), 12 states have internal predecessors, (203), 8 states have call successors, (36), 5 states have call predecessors, (36), 8 states have return successors, (36), 10 states have call predecessors, (36), 7 states have call successors, (36) [2021-11-19 14:28:21,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3144 states and 4963 transitions. [2021-11-19 14:28:21,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-19 14:28:21,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:21,905 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:28:21,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-19 14:28:22,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-19 14:28:22,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-19 14:28:22,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:28:22,517 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:22,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:22,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1818812850, now seen corresponding path program 1 times [2021-11-19 14:28:22,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:28:22,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958617186] [2021-11-19 14:28:22,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:22,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:28:22,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:28:22,520 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:28:22,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-19 14:28:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:22,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:28:22,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:28:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:28:23,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:28:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:28:23,816 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:28:23,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958617186] [2021-11-19 14:28:23,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958617186] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:28:23,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [604801695] [2021-11-19 14:28:23,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:23,816 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:28:23,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:28:23,817 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:28:23,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-19 14:28:24,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:24,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:28:24,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:28:24,465 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:28:24,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:28:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:28:25,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [604801695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:28:25,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778805495] [2021-11-19 14:28:25,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:25,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:28:25,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:28:25,018 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:28:25,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-19 14:28:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:25,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:28:25,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:28:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:28:25,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:28:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:28:26,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778805495] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:28:26,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:28:26,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-19 14:28:26,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098695185] [2021-11-19 14:28:26,111 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:28:26,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:28:26,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:28:26,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:28:26,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:28:26,113 INFO L87 Difference]: Start difference. First operand 3144 states and 4963 transitions. Second operand has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 6 states have call successors, (31), 5 states have call predecessors, (31), 6 states have return successors, (30), 7 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-19 14:28:30,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:30,466 INFO L93 Difference]: Finished difference Result 10922 states and 17404 transitions. [2021-11-19 14:28:30,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:28:30,467 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 6 states have call successors, (31), 5 states have call predecessors, (31), 6 states have return successors, (30), 7 states have call predecessors, (30), 5 states have call successors, (30) Word has length 177 [2021-11-19 14:28:30,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:30,500 INFO L225 Difference]: With dead ends: 10922 [2021-11-19 14:28:30,500 INFO L226 Difference]: Without dead ends: 7844 [2021-11-19 14:28:30,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1076 GetRequests, 1056 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:28:30,568 INFO L933 BasicCegarLoop]: 1353 mSDtfsCounter, 3987 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 3601 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4069 SdHoareTripleChecker+Valid, 2790 SdHoareTripleChecker+Invalid, 4806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 3601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:30,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4069 Valid, 2790 Invalid, 4806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1205 Valid, 3601 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-19 14:28:30,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7844 states. [2021-11-19 14:28:30,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7844 to 7792. [2021-11-19 14:28:31,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7792 states, 5892 states have (on average 1.5295315682281059) internal successors, (9012), 6098 states have internal predecessors, (9012), 1423 states have call successors, (1423), 434 states have call predecessors, (1423), 476 states have return successors, (1734), 1336 states have call predecessors, (1734), 1419 states have call successors, (1734) [2021-11-19 14:28:31,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7792 states to 7792 states and 12169 transitions. [2021-11-19 14:28:31,046 INFO L78 Accepts]: Start accepts. Automaton has 7792 states and 12169 transitions. Word has length 177 [2021-11-19 14:28:31,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:31,047 INFO L470 AbstractCegarLoop]: Abstraction has 7792 states and 12169 transitions. [2021-11-19 14:28:31,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 6 states have call successors, (31), 5 states have call predecessors, (31), 6 states have return successors, (30), 7 states have call predecessors, (30), 5 states have call successors, (30) [2021-11-19 14:28:31,047 INFO L276 IsEmpty]: Start isEmpty. Operand 7792 states and 12169 transitions. [2021-11-19 14:28:31,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-19 14:28:31,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:31,050 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:28:31,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-19 14:28:31,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-11-19 14:28:31,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-19 14:28:31,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:28:31,653 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:31,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:31,654 INFO L85 PathProgramCache]: Analyzing trace with hash 66120968, now seen corresponding path program 1 times [2021-11-19 14:28:31,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:28:31,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269580727] [2021-11-19 14:28:31,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:31,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:28:31,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:28:31,655 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:28:31,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-19 14:28:32,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:32,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:28:32,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:28:32,475 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:28:32,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:28:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:28:33,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:28:33,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269580727] [2021-11-19 14:28:33,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269580727] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:33,135 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:33,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 14:28:33,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663946070] [2021-11-19 14:28:33,135 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:33,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:28:33,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:28:33,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:28:33,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:28:33,136 INFO L87 Difference]: Start difference. First operand 7792 states and 12169 transitions. Second operand has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 8 states have call successors, (36), 6 states have call predecessors, (36), 5 states have return successors, (35), 8 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-19 14:28:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:38,635 INFO L93 Difference]: Finished difference Result 21938 states and 35275 transitions. [2021-11-19 14:28:38,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 14:28:38,637 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 8 states have call successors, (36), 6 states have call predecessors, (36), 5 states have return successors, (35), 8 states have call predecessors, (35), 7 states have call successors, (35) Word has length 179 [2021-11-19 14:28:38,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:38,810 INFO L225 Difference]: With dead ends: 21938 [2021-11-19 14:28:38,811 INFO L226 Difference]: Without dead ends: 14218 [2021-11-19 14:28:38,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-11-19 14:28:38,851 INFO L933 BasicCegarLoop]: 1575 mSDtfsCounter, 4447 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 5264 mSolverCounterSat, 1429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4549 SdHoareTripleChecker+Valid, 3408 SdHoareTripleChecker+Invalid, 6693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1429 IncrementalHoareTripleChecker+Valid, 5264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:38,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4549 Valid, 3408 Invalid, 6693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1429 Valid, 5264 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-11-19 14:28:38,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2021-11-19 14:28:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 13128. [2021-11-19 14:28:39,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13128 states, 9787 states have (on average 1.5296822315316236) internal successors, (14971), 10191 states have internal predecessors, (14971), 2571 states have call successors, (2571), 651 states have call predecessors, (2571), 769 states have return successors, (3184), 2474 states have call predecessors, (3184), 2567 states have call successors, (3184) [2021-11-19 14:28:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13128 states to 13128 states and 20726 transitions. [2021-11-19 14:28:39,858 INFO L78 Accepts]: Start accepts. Automaton has 13128 states and 20726 transitions. Word has length 179 [2021-11-19 14:28:39,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:39,859 INFO L470 AbstractCegarLoop]: Abstraction has 13128 states and 20726 transitions. [2021-11-19 14:28:39,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 8 states have call successors, (36), 6 states have call predecessors, (36), 5 states have return successors, (35), 8 states have call predecessors, (35), 7 states have call successors, (35) [2021-11-19 14:28:39,859 INFO L276 IsEmpty]: Start isEmpty. Operand 13128 states and 20726 transitions. [2021-11-19 14:28:39,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-19 14:28:39,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:39,862 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:28:39,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-19 14:28:40,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:28:40,077 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:40,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:40,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1847620903, now seen corresponding path program 1 times [2021-11-19 14:28:40,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:28:40,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639940218] [2021-11-19 14:28:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:40,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:28:40,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:28:40,079 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:28:40,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-19 14:28:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:40,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:28:40,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:28:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:28:40,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:28:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:28:41,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:28:41,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639940218] [2021-11-19 14:28:41,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639940218] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:41,553 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:41,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 14:28:41,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296453252] [2021-11-19 14:28:41,554 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:41,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:28:41,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:28:41,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:28:41,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:28:41,555 INFO L87 Difference]: Start difference. First operand 13128 states and 20726 transitions. Second operand has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 8 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-19 14:28:47,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:47,618 INFO L93 Difference]: Finished difference Result 39640 states and 64095 transitions. [2021-11-19 14:28:47,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 14:28:47,619 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 8 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) Word has length 179 [2021-11-19 14:28:47,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:47,777 INFO L225 Difference]: With dead ends: 39640 [2021-11-19 14:28:47,777 INFO L226 Difference]: Without dead ends: 28365 [2021-11-19 14:28:47,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-11-19 14:28:47,815 INFO L933 BasicCegarLoop]: 1022 mSDtfsCounter, 3169 mSDsluCounter, 2028 mSDsCounter, 0 mSdLazyCounter, 4563 mSolverCounterSat, 725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3242 SdHoareTripleChecker+Valid, 3050 SdHoareTripleChecker+Invalid, 5288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 725 IncrementalHoareTripleChecker+Valid, 4563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:47,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3242 Valid, 3050 Invalid, 5288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [725 Valid, 4563 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-19 14:28:47,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28365 states. [2021-11-19 14:28:49,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28365 to 26912. [2021-11-19 14:28:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26912 states, 20043 states have (on average 1.5288130519383325) internal successors, (30642), 20930 states have internal predecessors, (30642), 5180 states have call successors, (5180), 1260 states have call predecessors, (5180), 1688 states have return successors, (7165), 5072 states have call predecessors, (7165), 5176 states have call successors, (7165) [2021-11-19 14:28:49,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26912 states to 26912 states and 42987 transitions. [2021-11-19 14:28:49,638 INFO L78 Accepts]: Start accepts. Automaton has 26912 states and 42987 transitions. Word has length 179 [2021-11-19 14:28:49,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:49,639 INFO L470 AbstractCegarLoop]: Abstraction has 26912 states and 42987 transitions. [2021-11-19 14:28:49,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.666666666666666) internal successors, (176), 12 states have internal predecessors, (176), 8 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-19 14:28:49,639 INFO L276 IsEmpty]: Start isEmpty. Operand 26912 states and 42987 transitions. [2021-11-19 14:28:49,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-19 14:28:49,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:49,643 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:28:49,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Ended with exit code 0 [2021-11-19 14:28:49,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:28:49,845 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:49,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:49,845 INFO L85 PathProgramCache]: Analyzing trace with hash 579887911, now seen corresponding path program 1 times [2021-11-19 14:28:49,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:28:49,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38469642] [2021-11-19 14:28:49,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:49,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:28:49,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:28:49,848 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:28:49,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-19 14:28:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:50,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 14:28:50,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:28:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:28:50,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:28:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:28:51,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:28:51,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38469642] [2021-11-19 14:28:51,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38469642] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:28:51,829 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:28:51,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 18 [2021-11-19 14:28:51,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452705644] [2021-11-19 14:28:51,830 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:28:51,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 14:28:51,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:28:51,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 14:28:51,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:28:51,831 INFO L87 Difference]: Start difference. First operand 26912 states and 42987 transitions. Second operand has 18 states, 18 states have (on average 10.666666666666666) internal successors, (192), 14 states have internal predecessors, (192), 8 states have call successors, (36), 5 states have call predecessors, (36), 10 states have return successors, (38), 12 states have call predecessors, (38), 7 states have call successors, (38) [2021-11-19 14:28:56,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:28:56,117 INFO L93 Difference]: Finished difference Result 51758 states and 83509 transitions. [2021-11-19 14:28:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:28:56,117 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.666666666666666) internal successors, (192), 14 states have internal predecessors, (192), 8 states have call successors, (36), 5 states have call predecessors, (36), 10 states have return successors, (38), 12 states have call predecessors, (38), 7 states have call successors, (38) Word has length 181 [2021-11-19 14:28:56,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:28:56,244 INFO L225 Difference]: With dead ends: 51758 [2021-11-19 14:28:56,244 INFO L226 Difference]: Without dead ends: 26699 [2021-11-19 14:28:56,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:28:56,315 INFO L933 BasicCegarLoop]: 753 mSDtfsCounter, 1537 mSDsluCounter, 1842 mSDsCounter, 0 mSdLazyCounter, 3223 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 2595 SdHoareTripleChecker+Invalid, 3611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 3223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:28:56,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 2595 Invalid, 3611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 3223 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 14:28:56,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26699 states. [2021-11-19 14:28:58,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26699 to 26699. [2021-11-19 14:28:58,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26699 states, 19926 states have (on average 1.5290575127973502) internal successors, (30468), 20795 states have internal predecessors, (30468), 5123 states have call successors, (5123), 1239 states have call predecessors, (5123), 1649 states have return successors, (7072), 5015 states have call predecessors, (7072), 5119 states have call successors, (7072) [2021-11-19 14:28:58,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26699 states to 26699 states and 42663 transitions. [2021-11-19 14:28:58,393 INFO L78 Accepts]: Start accepts. Automaton has 26699 states and 42663 transitions. Word has length 181 [2021-11-19 14:28:58,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:28:58,394 INFO L470 AbstractCegarLoop]: Abstraction has 26699 states and 42663 transitions. [2021-11-19 14:28:58,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.666666666666666) internal successors, (192), 14 states have internal predecessors, (192), 8 states have call successors, (36), 5 states have call predecessors, (36), 10 states have return successors, (38), 12 states have call predecessors, (38), 7 states have call successors, (38) [2021-11-19 14:28:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 26699 states and 42663 transitions. [2021-11-19 14:28:58,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-19 14:28:58,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:28:58,401 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:28:58,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-11-19 14:28:58,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:28:58,613 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:28:58,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:28:58,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1511258106, now seen corresponding path program 1 times [2021-11-19 14:28:58,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:28:58,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059333460] [2021-11-19 14:28:58,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:28:58,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:28:58,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:28:58,615 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:28:58,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-19 14:28:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:28:59,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:28:59,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:28:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:28:59,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:29:00,529 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:00,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059333460] [2021-11-19 14:29:00,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059333460] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:00,529 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:00,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-19 14:29:00,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498366833] [2021-11-19 14:29:00,530 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:00,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:29:00,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:00,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:29:00,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:29:00,531 INFO L87 Difference]: Start difference. First operand 26699 states and 42663 transitions. Second operand has 14 states, 14 states have (on average 13.142857142857142) internal successors, (184), 12 states have internal predecessors, (184), 7 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (33), 9 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-19 14:29:11,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:11,704 INFO L93 Difference]: Finished difference Result 73450 states and 118430 transitions. [2021-11-19 14:29:11,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 14:29:11,704 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.142857142857142) internal successors, (184), 12 states have internal predecessors, (184), 7 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (33), 9 states have call predecessors, (33), 6 states have call successors, (33) Word has length 184 [2021-11-19 14:29:11,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:11,945 INFO L225 Difference]: With dead ends: 73450 [2021-11-19 14:29:11,945 INFO L226 Difference]: Without dead ends: 47899 [2021-11-19 14:29:12,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-19 14:29:12,030 INFO L933 BasicCegarLoop]: 964 mSDtfsCounter, 3968 mSDsluCounter, 3320 mSDsCounter, 0 mSdLazyCounter, 8754 mSolverCounterSat, 1152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4045 SdHoareTripleChecker+Valid, 4284 SdHoareTripleChecker+Invalid, 9906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1152 IncrementalHoareTripleChecker+Valid, 8754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:12,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4045 Valid, 4284 Invalid, 9906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1152 Valid, 8754 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-11-19 14:29:12,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47899 states. [2021-11-19 14:29:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47899 to 47101. [2021-11-19 14:29:15,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47101 states, 34850 states have (on average 1.5104447632711622) internal successors, (52639), 36480 states have internal predecessors, (52639), 9256 states have call successors, (9256), 2291 states have call predecessors, (9256), 2994 states have return successors, (12959), 9004 states have call predecessors, (12959), 9252 states have call successors, (12959) [2021-11-19 14:29:15,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47101 states to 47101 states and 74854 transitions. [2021-11-19 14:29:15,500 INFO L78 Accepts]: Start accepts. Automaton has 47101 states and 74854 transitions. Word has length 184 [2021-11-19 14:29:15,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:15,501 INFO L470 AbstractCegarLoop]: Abstraction has 47101 states and 74854 transitions. [2021-11-19 14:29:15,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.142857142857142) internal successors, (184), 12 states have internal predecessors, (184), 7 states have call successors, (33), 5 states have call predecessors, (33), 6 states have return successors, (33), 9 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-19 14:29:15,501 INFO L276 IsEmpty]: Start isEmpty. Operand 47101 states and 74854 transitions. [2021-11-19 14:29:15,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-19 14:29:15,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:15,506 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:29:15,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Ended with exit code 0 [2021-11-19 14:29:15,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:15,707 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:15,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:15,707 INFO L85 PathProgramCache]: Analyzing trace with hash -598961750, now seen corresponding path program 1 times [2021-11-19 14:29:15,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:15,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474900327] [2021-11-19 14:29:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:15,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:15,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:15,710 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:15,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-19 14:29:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:16,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:29:16,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:29:16,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:29:16,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:16,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474900327] [2021-11-19 14:29:16,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474900327] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:16,884 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:16,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:29:16,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019859] [2021-11-19 14:29:16,884 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:16,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:29:16,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:16,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:29:16,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:29:16,885 INFO L87 Difference]: Start difference. First operand 47101 states and 74854 transitions. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 6 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-19 14:29:20,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:20,695 INFO L93 Difference]: Finished difference Result 95184 states and 153652 transitions. [2021-11-19 14:29:20,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:29:20,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 6 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 191 [2021-11-19 14:29:20,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:20,999 INFO L225 Difference]: With dead ends: 95184 [2021-11-19 14:29:20,999 INFO L226 Difference]: Without dead ends: 47101 [2021-11-19 14:29:21,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:29:21,358 INFO L933 BasicCegarLoop]: 881 mSDtfsCounter, 528 mSDsluCounter, 3004 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 3885 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:21,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [528 Valid, 3885 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:29:21,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47101 states. [2021-11-19 14:29:24,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47101 to 47101. [2021-11-19 14:29:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47101 states, 34850 states have (on average 1.4951219512195122) internal successors, (52105), 36480 states have internal predecessors, (52105), 9256 states have call successors, (9256), 2291 states have call predecessors, (9256), 2994 states have return successors, (12959), 9004 states have call predecessors, (12959), 9252 states have call successors, (12959) [2021-11-19 14:29:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47101 states to 47101 states and 74320 transitions. [2021-11-19 14:29:24,722 INFO L78 Accepts]: Start accepts. Automaton has 47101 states and 74320 transitions. Word has length 191 [2021-11-19 14:29:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:29:24,722 INFO L470 AbstractCegarLoop]: Abstraction has 47101 states and 74320 transitions. [2021-11-19 14:29:24,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 8 states have internal predecessors, (148), 6 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2021-11-19 14:29:24,723 INFO L276 IsEmpty]: Start isEmpty. Operand 47101 states and 74320 transitions. [2021-11-19 14:29:24,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-19 14:29:24,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:29:24,727 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:29:24,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2021-11-19 14:29:24,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:29:24,928 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:29:24,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:29:24,928 INFO L85 PathProgramCache]: Analyzing trace with hash 557313171, now seen corresponding path program 1 times [2021-11-19 14:29:24,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:29:24,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990478931] [2021-11-19 14:29:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:29:24,929 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:29:24,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:29:24,930 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:29:24,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6dc07d2-8712-44a6-82f7-44a2aaf8be73/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-19 14:29:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:29:25,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:29:25,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:29:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-19 14:29:25,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:29:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-19 14:29:26,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:29:26,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990478931] [2021-11-19 14:29:26,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990478931] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:29:26,386 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:29:26,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-19 14:29:26,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144015992] [2021-11-19 14:29:26,387 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:29:26,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:29:26,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:29:26,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:29:26,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:29:26,388 INFO L87 Difference]: Start difference. First operand 47101 states and 74320 transitions. Second operand has 9 states, 9 states have (on average 20.333333333333332) internal successors, (183), 9 states have internal predecessors, (183), 6 states have call successors, (35), 5 states have call predecessors, (35), 4 states have return successors, (33), 6 states have call predecessors, (33), 5 states have call successors, (33) [2021-11-19 14:29:33,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:29:33,312 INFO L93 Difference]: Finished difference Result 97142 states and 155138 transitions. [2021-11-19 14:29:33,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:29:33,313 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 20.333333333333332) internal successors, (183), 9 states have internal predecessors, (183), 6 states have call successors, (35), 5 states have call predecessors, (35), 4 states have return successors, (33), 6 states have call predecessors, (33), 5 states have call successors, (33) Word has length 196 [2021-11-19 14:29:33,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:29:33,563 INFO L225 Difference]: With dead ends: 97142 [2021-11-19 14:29:33,563 INFO L226 Difference]: Without dead ends: 52144 [2021-11-19 14:29:33,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:29:33,687 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 2010 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 3508 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2089 SdHoareTripleChecker+Valid, 2388 SdHoareTripleChecker+Invalid, 4026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 3508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:29:33,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2089 Valid, 2388 Invalid, 4026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 3508 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-19 14:29:33,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52144 states.