./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF --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 b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:34:57,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:34:57,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:34:57,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:34:57,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:34:57,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:34:57,278 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:34:57,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:34:57,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:34:57,292 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:34:57,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:34:57,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:34:57,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:34:57,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:34:57,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:34:57,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:34:57,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:34:57,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:34:57,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:34:57,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:34:57,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:34:57,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:34:57,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:34:57,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:34:57,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:34:57,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:34:57,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:34:57,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:34:57,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:34:57,360 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:34:57,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:34:57,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:34:57,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:34:57,366 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:34:57,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:34:57,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:34:57,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:34:57,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:34:57,370 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:34:57,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:34:57,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:34:57,373 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:34:57,426 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:34:57,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:34:57,428 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:34:57,428 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:34:57,428 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:34:57,429 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:34:57,429 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:34:57,429 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:34:57,437 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:34:57,437 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:34:57,438 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:34:57,438 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:34:57,439 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:34:57,439 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:34:57,439 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:34:57,440 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:34:57,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:34:57,441 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:34:57,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:34:57,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:34:57,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:34:57,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:34:57,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:34:57,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:34:57,443 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:34:57,443 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:34:57,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:34:57,444 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:34:57,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:34:57,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:34:57,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:34:57,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:34:57,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:34:57,448 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:34:57,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:34:57,448 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:34:57,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:34:57,449 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:34:57,449 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:34:57,449 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:34:57,449 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_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 [2021-11-12 23:34:57,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:34:57,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:34:57,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:34:57,799 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:34:57,800 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:34:57,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2021-11-12 23:34:57,875 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/data/2d426d55e/3f078bfb6d564dd49aee3b9238fd886c/FLAG581f62d47 [2021-11-12 23:34:58,623 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:34:58,624 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2021-11-12 23:34:58,668 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/data/2d426d55e/3f078bfb6d564dd49aee3b9238fd886c/FLAG581f62d47 [2021-11-12 23:34:58,792 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/data/2d426d55e/3f078bfb6d564dd49aee3b9238fd886c [2021-11-12 23:34:58,795 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:34:58,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:34:58,803 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:34:58,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:34:58,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:34:58,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:34:58" (1/1) ... [2021-11-12 23:34:58,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cd53483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:34:58, skipping insertion in model container [2021-11-12 23:34:58,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:34:58" (1/1) ... [2021-11-12 23:34:58,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:34:58,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:34:59,418 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2021-11-12 23:34:59,656 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:34:59,674 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) [2021-11-12 23:34:59,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6da42afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:34:59, skipping insertion in model container [2021-11-12 23:34:59,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:34:59,675 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:34:59,678 INFO L158 Benchmark]: Toolchain (without parser) took 879.38ms. Allocated memory was 88.1MB in the beginning and 115.3MB in the end (delta: 27.3MB). Free memory was 47.6MB in the beginning and 75.6MB in the end (delta: -28.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 23:34:59,680 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 88.1MB. Free memory is still 67.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:34:59,682 INFO L158 Benchmark]: CACSL2BoogieTranslator took 871.81ms. Allocated memory was 88.1MB in the beginning and 115.3MB in the end (delta: 27.3MB). Free memory was 47.5MB in the beginning and 75.6MB in the end (delta: -28.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 23:34:59,685 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 88.1MB. Free memory is still 67.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 871.81ms. Allocated memory was 88.1MB in the beginning and 115.3MB in the end (delta: 27.3MB). Free memory was 47.5MB in the beginning and 75.6MB in the end (delta: -28.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1281]: 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_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF --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 b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:35:02,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:35:02,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:35:02,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:35:02,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:35:02,488 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:35:02,490 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:35:02,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:35:02,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:35:02,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:35:02,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:35:02,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:35:02,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:35:02,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:35:02,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:35:02,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:35:02,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:35:02,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:35:02,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:35:02,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:35:02,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:35:02,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:35:02,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:35:02,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:35:02,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:35:02,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:35:02,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:35:02,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:35:02,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:35:02,562 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:35:02,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:35:02,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:35:02,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:35:02,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:35:02,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:35:02,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:35:02,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:35:02,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:35:02,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:35:02,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:35:02,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:35:02,577 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:35:02,633 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:35:02,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:35:02,635 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:35:02,636 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:35:02,636 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:35:02,636 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:35:02,637 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:35:02,637 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:35:02,637 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:35:02,637 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:35:02,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:35:02,641 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:35:02,641 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:35:02,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:35:02,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:35:02,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:35:02,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:35:02,643 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:35:02,643 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:35:02,644 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:35:02,644 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:35:02,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:35:02,644 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:35:02,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:35:02,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:35:02,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:35:02,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:35:02,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:35:02,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:35:02,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:35:02,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:35:02,647 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:35:02,647 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:35:02,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:35:02,648 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:35:02,649 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:35:02,649 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_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b90339f9090766921b1c16763101e1e0bf56713d98b802bfaa51b02dabc40a61 [2021-11-12 23:35:03,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:35:03,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:35:03,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:35:03,230 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:35:03,232 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:35:03,234 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2021-11-12 23:35:03,331 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/data/ebb335d59/4dfa3fcf588843fd8f2d68f8853b4d70/FLAG556c35f18 [2021-11-12 23:35:04,154 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:35:04,155 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c [2021-11-12 23:35:04,186 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/data/ebb335d59/4dfa3fcf588843fd8f2d68f8853b4d70/FLAG556c35f18 [2021-11-12 23:35:04,287 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/data/ebb335d59/4dfa3fcf588843fd8f2d68f8853b4d70 [2021-11-12 23:35:04,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:35:04,296 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:35:04,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:35:04,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:35:04,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:35:04,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:35:04" (1/1) ... [2021-11-12 23:35:04,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@104d2f0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:04, skipping insertion in model container [2021-11-12 23:35:04,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:35:04" (1/1) ... [2021-11-12 23:35:04,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:35:04,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:35:05,029 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2021-11-12 23:35:05,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:35:05,295 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:35:05,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:35:05,424 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2021-11-12 23:35:05,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:35:05,481 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:35:05,567 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/sv-benchmarks/c/product-lines/elevator_spec1_product27.cil.c[35415,35428] [2021-11-12 23:35:05,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:35:05,714 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:35:05,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:05 WrapperNode [2021-11-12 23:35:05,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:35:05,716 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:35:05,716 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:35:05,717 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:35:05,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:05" (1/1) ... [2021-11-12 23:35:05,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:05" (1/1) ... [2021-11-12 23:35:05,907 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:35:05,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:35:05,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:35:05,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:35:05,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:05" (1/1) ... [2021-11-12 23:35:05,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:05" (1/1) ... [2021-11-12 23:35:05,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:05" (1/1) ... [2021-11-12 23:35:05,945 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:05" (1/1) ... [2021-11-12 23:35:05,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:05" (1/1) ... [2021-11-12 23:35:06,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:05" (1/1) ... [2021-11-12 23:35:06,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:05" (1/1) ... [2021-11-12 23:35:06,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:35:06,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:35:06,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:35:06,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:35:06,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:05" (1/1) ... [2021-11-12 23:35:06,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:35:06,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:35:06,112 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:35:06,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:35:06,187 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-12 23:35:06,187 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-12 23:35:06,187 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:35:06,187 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:35:06,188 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 23:35:06,188 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 23:35:06,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:35:06,188 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:35:06,188 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:35:06,189 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 23:35:06,189 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 23:35:06,189 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:35:06,189 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:35:06,189 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:35:06,190 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:35:06,190 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:35:06,190 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:35:06,190 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:35:06,190 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:35:06,191 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-12 23:35:06,191 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-12 23:35:06,191 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-12 23:35:06,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-12 23:35:06,191 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:35:06,192 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:35:06,192 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:35:06,192 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:35:06,192 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:35:06,192 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:35:06,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:35:06,193 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 23:35:06,194 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 23:35:06,194 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:35:06,194 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:35:06,194 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 23:35:06,194 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-12 23:35:06,195 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:35:06,195 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:35:06,195 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:35:06,195 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:35:06,195 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:35:06,196 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:35:06,196 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:35:06,196 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:35:06,196 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:35:06,196 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:35:06,197 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:35:06,197 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:35:06,198 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:35:06,199 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:35:06,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:35:06,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:35:06,201 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:35:06,201 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:35:10,581 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:35:10,581 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:35:10,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:35:10 BoogieIcfgContainer [2021-11-12 23:35:10,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:35:10,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:35:10,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:35:10,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:35:10,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:35:04" (1/3) ... [2021-11-12 23:35:10,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@506d782b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:35:10, skipping insertion in model container [2021-11-12 23:35:10,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:35:05" (2/3) ... [2021-11-12 23:35:10,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@506d782b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:35:10, skipping insertion in model container [2021-11-12 23:35:10,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:35:10" (3/3) ... [2021-11-12 23:35:10,596 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product27.cil.c [2021-11-12 23:35:10,602 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:35:10,602 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:35:10,655 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:35:10,662 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 [2021-11-12 23:35:10,662 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:35:10,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 576 states, 450 states have (on average 1.6866666666666668) internal successors, (759), 471 states have internal predecessors, (759), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-12 23:35:10,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 23:35:10,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:10,743 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] [2021-11-12 23:35:10,743 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:10,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:10,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2046185368, now seen corresponding path program 1 times [2021-11-12 23:35:10,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:10,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324205990] [2021-11-12 23:35:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:10,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:10,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:10,776 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:10,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:35:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:11,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:35:11,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:35:11,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:35:12,188 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:12,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324205990] [2021-11-12 23:35:12,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324205990] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:12,190 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:35:12,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:35:12,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866379772] [2021-11-12 23:35:12,193 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:12,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:35:12,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:12,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:35:12,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:35:12,232 INFO L87 Difference]: Start difference. First operand has 576 states, 450 states have (on average 1.6866666666666668) internal successors, (759), 471 states have internal predecessors, (759), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-12 23:35:12,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:12,315 INFO L93 Difference]: Finished difference Result 597 states and 987 transitions. [2021-11-12 23:35:12,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:35:12,320 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 125 [2021-11-12 23:35:12,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:12,358 INFO L225 Difference]: With dead ends: 597 [2021-11-12 23:35:12,358 INFO L226 Difference]: Without dead ends: 568 [2021-11-12 23:35:12,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:35:12,371 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.65ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:12,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 13.65ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:35:12,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-12 23:35:12,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-12 23:35:12,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 444 states have (on average 1.6846846846846846) internal successors, (748), 463 states have internal predecessors, (748), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:35:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 941 transitions. [2021-11-12 23:35:12,492 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 941 transitions. Word has length 125 [2021-11-12 23:35:12,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:12,494 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 941 transitions. [2021-11-12 23:35:12,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-12 23:35:12,495 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 941 transitions. [2021-11-12 23:35:12,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:35:12,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:12,506 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] [2021-11-12 23:35:12,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:12,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:12,720 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:12,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:12,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1473529241, now seen corresponding path program 1 times [2021-11-12 23:35:12,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:12,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615455384] [2021-11-12 23:35:12,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:12,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:12,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:12,724 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:12,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:35:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:13,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:35:13,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:35:13,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:35:14,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:14,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615455384] [2021-11-12 23:35:14,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615455384] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:14,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:35:14,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:35:14,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810094552] [2021-11-12 23:35:14,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:14,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:35:14,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:14,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:35:14,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:35:14,160 INFO L87 Difference]: Start difference. First operand 568 states and 941 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:14,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:14,334 INFO L93 Difference]: Finished difference Result 1127 states and 1874 transitions. [2021-11-12 23:35:14,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:35:14,335 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 127 [2021-11-12 23:35:14,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:14,348 INFO L225 Difference]: With dead ends: 1127 [2021-11-12 23:35:14,348 INFO L226 Difference]: Without dead ends: 568 [2021-11-12 23:35:14,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:14,361 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 14 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.51ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.72ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:14,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2774 Invalid, 35 Unknown, 0 Unchecked, 18.51ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 46.72ms Time] [2021-11-12 23:35:14,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-12 23:35:14,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-12 23:35:14,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 444 states have (on average 1.6824324324324325) internal successors, (747), 463 states have internal predecessors, (747), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:35:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 940 transitions. [2021-11-12 23:35:14,445 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 940 transitions. Word has length 127 [2021-11-12 23:35:14,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:14,446 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 940 transitions. [2021-11-12 23:35:14,447 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, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:14,447 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 940 transitions. [2021-11-12 23:35:14,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-12 23:35:14,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:14,460 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] [2021-11-12 23:35:14,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:14,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:14,679 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:14,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:14,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1802520523, now seen corresponding path program 1 times [2021-11-12 23:35:14,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:14,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568666413] [2021-11-12 23:35:14,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:14,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:14,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:14,683 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:14,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:35:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:15,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 1039 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:35:15,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:15,849 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:35:15,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:35:16,285 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:16,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568666413] [2021-11-12 23:35:16,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568666413] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:16,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:35:16,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:35:16,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848440996] [2021-11-12 23:35:16,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:16,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:35:16,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:16,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:35:16,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:35:16,298 INFO L87 Difference]: Start difference. First operand 568 states and 940 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:16,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:16,430 INFO L93 Difference]: Finished difference Result 1127 states and 1872 transitions. [2021-11-12 23:35:16,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:35:16,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 129 [2021-11-12 23:35:16,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:16,440 INFO L225 Difference]: With dead ends: 1127 [2021-11-12 23:35:16,440 INFO L226 Difference]: Without dead ends: 568 [2021-11-12 23:35:16,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:16,449 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 12 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.96ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:16,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2774 Invalid, 33 Unknown, 0 Unchecked, 19.96ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 48.54ms Time] [2021-11-12 23:35:16,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-11-12 23:35:16,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2021-11-12 23:35:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 444 states have (on average 1.6801801801801801) internal successors, (746), 463 states have internal predecessors, (746), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:35:16,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 939 transitions. [2021-11-12 23:35:16,512 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 939 transitions. Word has length 129 [2021-11-12 23:35:16,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:16,513 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 939 transitions. [2021-11-12 23:35:16,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:16,513 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 939 transitions. [2021-11-12 23:35:16,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 23:35:16,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:16,522 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] [2021-11-12 23:35:16,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:16,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:16,736 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:16,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:16,737 INFO L85 PathProgramCache]: Analyzing trace with hash 33674215, now seen corresponding path program 1 times [2021-11-12 23:35:16,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:16,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374668824] [2021-11-12 23:35:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:16,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:16,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:16,743 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:16,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:35:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:17,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:35:17,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:35:17,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:35:18,104 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:18,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374668824] [2021-11-12 23:35:18,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374668824] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:18,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:35:18,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:35:18,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116546923] [2021-11-12 23:35:18,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:18,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:35:18,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:18,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:35:18,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:35:18,107 INFO L87 Difference]: Start difference. First operand 568 states and 939 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:18,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:18,227 INFO L93 Difference]: Finished difference Result 1131 states and 1875 transitions. [2021-11-12 23:35:18,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:35:18,228 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 131 [2021-11-12 23:35:18,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:18,234 INFO L225 Difference]: With dead ends: 1131 [2021-11-12 23:35:18,234 INFO L226 Difference]: Without dead ends: 574 [2021-11-12 23:35:18,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:18,238 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 13 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.24ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:18,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2774 Invalid, 35 Unknown, 0 Unchecked, 7.24ms Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 39.28ms Time] [2021-11-12 23:35:18,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-12 23:35:18,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-12 23:35:18,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 449 states have (on average 1.6726057906458798) internal successors, (751), 468 states have internal predecessors, (751), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:35:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 944 transitions. [2021-11-12 23:35:18,270 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 944 transitions. Word has length 131 [2021-11-12 23:35:18,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:18,270 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 944 transitions. [2021-11-12 23:35:18,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:18,271 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 944 transitions. [2021-11-12 23:35:18,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-12 23:35:18,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:18,276 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] [2021-11-12 23:35:18,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:18,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:18,497 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:18,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:18,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1047710980, now seen corresponding path program 1 times [2021-11-12 23:35:18,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:18,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [33817641] [2021-11-12 23:35:18,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:18,499 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:18,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:18,500 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:18,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:35:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:19,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:35:19,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:35:19,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:35:19,755 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:19,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [33817641] [2021-11-12 23:35:19,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [33817641] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:19,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:35:19,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:35:19,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128601694] [2021-11-12 23:35:19,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:19,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:35:19,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:19,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:35:19,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:35:19,758 INFO L87 Difference]: Start difference. First operand 574 states and 944 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:19,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:19,836 INFO L93 Difference]: Finished difference Result 1130 states and 1866 transitions. [2021-11-12 23:35:19,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:35:19,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 132 [2021-11-12 23:35:19,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:19,843 INFO L225 Difference]: With dead ends: 1130 [2021-11-12 23:35:19,843 INFO L226 Difference]: Without dead ends: 574 [2021-11-12 23:35:19,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:19,850 INFO L933 BasicCegarLoop]: 928 mSDtfsCounter, 8 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2775 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.09ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:19,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2775 Invalid, 30 Unknown, 0 Unchecked, 7.09ms Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 30.45ms Time] [2021-11-12 23:35:19,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-12 23:35:19,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-12 23:35:19,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 449 states have (on average 1.670378619153675) internal successors, (750), 468 states have internal predecessors, (750), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:35:19,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 943 transitions. [2021-11-12 23:35:19,882 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 943 transitions. Word has length 132 [2021-11-12 23:35:19,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:19,883 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 943 transitions. [2021-11-12 23:35:19,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:19,887 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 943 transitions. [2021-11-12 23:35:19,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-12 23:35:19,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:19,892 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] [2021-11-12 23:35:19,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:20,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:20,116 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:20,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:20,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1025925749, now seen corresponding path program 1 times [2021-11-12 23:35:20,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:20,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889150006] [2021-11-12 23:35:20,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:20,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:20,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:20,118 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:20,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:35:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:20,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:35:20,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:35:20,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:35:21,431 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:21,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889150006] [2021-11-12 23:35:21,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889150006] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:21,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:35:21,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:35:21,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514147114] [2021-11-12 23:35:21,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:21,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:35:21,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:21,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:35:21,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:35:21,435 INFO L87 Difference]: Start difference. First operand 574 states and 943 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:21,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:21,534 INFO L93 Difference]: Finished difference Result 1130 states and 1865 transitions. [2021-11-12 23:35:21,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:35:21,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 133 [2021-11-12 23:35:21,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:21,545 INFO L225 Difference]: With dead ends: 1130 [2021-11-12 23:35:21,546 INFO L226 Difference]: Without dead ends: 574 [2021-11-12 23:35:21,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:21,555 INFO L933 BasicCegarLoop]: 928 mSDtfsCounter, 6 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2775 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.41ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.55ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:21,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2775 Invalid, 28 Unknown, 0 Unchecked, 7.41ms Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 36.55ms Time] [2021-11-12 23:35:21,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-12 23:35:21,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-12 23:35:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 449 states have (on average 1.6681514476614698) internal successors, (749), 468 states have internal predecessors, (749), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:35:21,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 942 transitions. [2021-11-12 23:35:21,589 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 942 transitions. Word has length 133 [2021-11-12 23:35:21,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:21,589 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 942 transitions. [2021-11-12 23:35:21,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:21,590 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 942 transitions. [2021-11-12 23:35:21,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 23:35:21,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:21,595 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] [2021-11-12 23:35:21,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:21,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:21,812 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:21,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:21,812 INFO L85 PathProgramCache]: Analyzing trace with hash -33192984, now seen corresponding path program 1 times [2021-11-12 23:35:21,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:21,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119467622] [2021-11-12 23:35:21,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:21,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:21,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:21,816 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:21,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:35:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:22,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:35:22,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:35:22,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:35:23,341 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:23,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119467622] [2021-11-12 23:35:23,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119467622] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:23,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:35:23,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-12 23:35:23,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784953078] [2021-11-12 23:35:23,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:23,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:35:23,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:23,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:35:23,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:35:23,344 INFO L87 Difference]: Start difference. First operand 574 states and 942 transitions. Second operand has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 23:35:23,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:23,587 INFO L93 Difference]: Finished difference Result 1147 states and 1893 transitions. [2021-11-12 23:35:23,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:35:23,589 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 134 [2021-11-12 23:35:23,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:23,599 INFO L225 Difference]: With dead ends: 1147 [2021-11-12 23:35:23,599 INFO L226 Difference]: Without dead ends: 595 [2021-11-12 23:35:23,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:35:23,604 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 148 mSDsluCounter, 4523 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 155.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5449 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.90ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 171.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:23,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5449 Invalid, 85 Unknown, 0 Unchecked, 11.90ms Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 171.68ms Time] [2021-11-12 23:35:23,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-12 23:35:23,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 593. [2021-11-12 23:35:23,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 465 states have (on average 1.6666666666666667) internal successors, (775), 486 states have internal predecessors, (775), 100 states have call successors, (100), 26 states have call predecessors, (100), 27 states have return successors, (98), 93 states have call predecessors, (98), 95 states have call successors, (98) [2021-11-12 23:35:23,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 973 transitions. [2021-11-12 23:35:23,645 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 973 transitions. Word has length 134 [2021-11-12 23:35:23,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:23,646 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 973 transitions. [2021-11-12 23:35:23,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 23:35:23,646 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 973 transitions. [2021-11-12 23:35:23,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-12 23:35:23,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:23,655 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] [2021-11-12 23:35:23,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:23,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:23,868 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:23,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:23,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1253289321, now seen corresponding path program 1 times [2021-11-12 23:35:23,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:23,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1694430075] [2021-11-12 23:35:23,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:23,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:23,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:23,873 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:23,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:35:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:24,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:35:24,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:35:24,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-12 23:35:25,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:25,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1694430075] [2021-11-12 23:35:25,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1694430075] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:25,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:35:25,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-12 23:35:25,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908397894] [2021-11-12 23:35:25,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:25,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:35:25,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:25,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:35:25,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:35:25,306 INFO L87 Difference]: Start difference. First operand 593 states and 973 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:25,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:25,386 INFO L93 Difference]: Finished difference Result 1160 states and 1915 transitions. [2021-11-12 23:35:25,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:35:25,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 134 [2021-11-12 23:35:25,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:25,393 INFO L225 Difference]: With dead ends: 1160 [2021-11-12 23:35:25,393 INFO L226 Difference]: Without dead ends: 589 [2021-11-12 23:35:25,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:35:25,397 INFO L933 BasicCegarLoop]: 927 mSDtfsCounter, 8 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.02ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.32ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:25,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2774 Invalid, 30 Unknown, 0 Unchecked, 6.02ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 35.32ms Time] [2021-11-12 23:35:25,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-12 23:35:25,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2021-11-12 23:35:25,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 463 states have (on average 1.6673866090712743) internal successors, (772), 483 states have internal predecessors, (772), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (95), 92 states have call predecessors, (95), 94 states have call successors, (95) [2021-11-12 23:35:25,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 966 transitions. [2021-11-12 23:35:25,427 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 966 transitions. Word has length 134 [2021-11-12 23:35:25,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:25,428 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 966 transitions. [2021-11-12 23:35:25,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:25,428 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 966 transitions. [2021-11-12 23:35:25,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-12 23:35:25,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:25,434 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:35:25,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:25,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:25,654 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:25,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:25,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1916228868, now seen corresponding path program 1 times [2021-11-12 23:35:25,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:25,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [42900404] [2021-11-12 23:35:25,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:25,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:25,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:25,657 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:25,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:35:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:26,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:35:26,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:35:26,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:35:26,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:26,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [42900404] [2021-11-12 23:35:26,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [42900404] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:26,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:35:26,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:35:26,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897680166] [2021-11-12 23:35:26,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:26,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:35:26,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:26,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:35:26,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:35:26,772 INFO L87 Difference]: Start difference. First operand 589 states and 966 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:26,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:26,982 INFO L93 Difference]: Finished difference Result 1186 states and 1960 transitions. [2021-11-12 23:35:26,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:35:26,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 135 [2021-11-12 23:35:26,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:26,989 INFO L225 Difference]: With dead ends: 1186 [2021-11-12 23:35:26,989 INFO L226 Difference]: Without dead ends: 589 [2021-11-12 23:35:26,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:26,994 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 134 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.31ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 159.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:26,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2582 Invalid, 131 Unknown, 0 Unchecked, 7.31ms Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 159.92ms Time] [2021-11-12 23:35:26,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-12 23:35:27,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2021-11-12 23:35:27,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 463 states have (on average 1.65658747300216) internal successors, (767), 483 states have internal predecessors, (767), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (95), 92 states have call predecessors, (95), 94 states have call successors, (95) [2021-11-12 23:35:27,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 961 transitions. [2021-11-12 23:35:27,021 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 961 transitions. Word has length 135 [2021-11-12 23:35:27,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:27,021 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 961 transitions. [2021-11-12 23:35:27,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:27,022 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 961 transitions. [2021-11-12 23:35:27,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 23:35:27,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:27,027 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:35:27,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:27,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:27,240 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:27,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:27,241 INFO L85 PathProgramCache]: Analyzing trace with hash -693688392, now seen corresponding path program 1 times [2021-11-12 23:35:27,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:27,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211902428] [2021-11-12 23:35:27,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:27,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:27,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:27,243 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:27,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:35:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:27,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1047 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:35:27,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:28,061 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:35:28,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:28,482 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:35:28,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:28,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211902428] [2021-11-12 23:35:28,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211902428] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:28,482 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:35:28,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:35:28,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894777042] [2021-11-12 23:35:28,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:28,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:35:28,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:28,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:35:28,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:35:28,484 INFO L87 Difference]: Start difference. First operand 589 states and 961 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:28,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:28,697 INFO L93 Difference]: Finished difference Result 1186 states and 1950 transitions. [2021-11-12 23:35:28,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:35:28,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 137 [2021-11-12 23:35:28,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:28,705 INFO L225 Difference]: With dead ends: 1186 [2021-11-12 23:35:28,705 INFO L226 Difference]: Without dead ends: 589 [2021-11-12 23:35:28,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:28,710 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 128 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2582 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.81ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 157.41ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:28,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2582 Invalid, 121 Unknown, 0 Unchecked, 7.81ms Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 157.41ms Time] [2021-11-12 23:35:28,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-11-12 23:35:28,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 589. [2021-11-12 23:35:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 463 states have (on average 1.6457883369330453) internal successors, (762), 483 states have internal predecessors, (762), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (95), 92 states have call predecessors, (95), 94 states have call successors, (95) [2021-11-12 23:35:28,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 956 transitions. [2021-11-12 23:35:28,738 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 956 transitions. Word has length 137 [2021-11-12 23:35:28,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:28,738 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 956 transitions. [2021-11-12 23:35:28,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:28,739 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 956 transitions. [2021-11-12 23:35:28,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 23:35:28,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:28,744 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:35:28,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:28,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:28,966 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:28,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:28,966 INFO L85 PathProgramCache]: Analyzing trace with hash 875821148, now seen corresponding path program 1 times [2021-11-12 23:35:28,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:28,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814764596] [2021-11-12 23:35:28,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:28,967 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:28,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:28,968 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:28,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:35:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:29,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:35:29,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:35:29,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:35:30,277 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:30,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814764596] [2021-11-12 23:35:30,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814764596] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:30,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:35:30,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:35:30,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961008964] [2021-11-12 23:35:30,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:30,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:35:30,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:30,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:35:30,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:35:30,282 INFO L87 Difference]: Start difference. First operand 589 states and 956 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:30,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:30,533 INFO L93 Difference]: Finished difference Result 1207 states and 1971 transitions. [2021-11-12 23:35:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:35:30,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 139 [2021-11-12 23:35:30,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:30,543 INFO L225 Difference]: With dead ends: 1207 [2021-11-12 23:35:30,543 INFO L226 Difference]: Without dead ends: 619 [2021-11-12 23:35:30,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:30,551 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 143 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 166.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2592 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.03ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 192.42ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:30,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2592 Invalid, 131 Unknown, 0 Unchecked, 8.03ms Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 192.42ms Time] [2021-11-12 23:35:30,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-11-12 23:35:30,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 604. [2021-11-12 23:35:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 478 states have (on average 1.6255230125523012) internal successors, (777), 497 states have internal predecessors, (777), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:35:30,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 970 transitions. [2021-11-12 23:35:30,584 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 970 transitions. Word has length 139 [2021-11-12 23:35:30,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:30,586 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 970 transitions. [2021-11-12 23:35:30,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:30,586 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 970 transitions. [2021-11-12 23:35:30,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 23:35:30,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:30,593 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:35:30,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:30,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:30,812 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:30,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:30,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1483641892, now seen corresponding path program 1 times [2021-11-12 23:35:30,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:30,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103659801] [2021-11-12 23:35:30,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:30,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:30,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:30,814 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:30,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:35:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:31,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:35:31,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:35:31,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:35:32,271 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:32,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103659801] [2021-11-12 23:35:32,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103659801] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:32,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:35:32,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-12 23:35:32,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229323275] [2021-11-12 23:35:32,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:32,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:35:32,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:32,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:35:32,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:35:32,274 INFO L87 Difference]: Start difference. First operand 604 states and 970 transitions. Second operand has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 23:35:32,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:32,509 INFO L93 Difference]: Finished difference Result 1171 states and 1892 transitions. [2021-11-12 23:35:32,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:35:32,511 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 139 [2021-11-12 23:35:32,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:32,519 INFO L225 Difference]: With dead ends: 1171 [2021-11-12 23:35:32,519 INFO L226 Difference]: Without dead ends: 598 [2021-11-12 23:35:32,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:35:32,524 INFO L933 BasicCegarLoop]: 929 mSDtfsCounter, 131 mSDsluCounter, 4488 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 130.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5417 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.60ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 150.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:32,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5417 Invalid, 75 Unknown, 0 Unchecked, 11.60ms Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 150.13ms Time] [2021-11-12 23:35:32,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-12 23:35:32,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 583. [2021-11-12 23:35:32,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 457 states have (on average 1.6192560175054704) internal successors, (740), 476 states have internal predecessors, (740), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:35:32,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 933 transitions. [2021-11-12 23:35:32,556 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 933 transitions. Word has length 139 [2021-11-12 23:35:32,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:32,557 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 933 transitions. [2021-11-12 23:35:32,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 23:35:32,557 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 933 transitions. [2021-11-12 23:35:32,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-12 23:35:32,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:32,564 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:35:32,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:32,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:32,788 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:32,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:32,788 INFO L85 PathProgramCache]: Analyzing trace with hash 2020187941, now seen corresponding path program 1 times [2021-11-12 23:35:32,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:32,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158945024] [2021-11-12 23:35:32,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:32,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:32,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:32,791 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:32,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:35:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:33,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:35:33,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:35:33,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:35:34,001 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:34,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158945024] [2021-11-12 23:35:34,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158945024] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:34,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:35:34,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:35:34,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329471756] [2021-11-12 23:35:34,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:34,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:35:34,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:34,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:35:34,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:35:34,003 INFO L87 Difference]: Start difference. First operand 583 states and 933 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:34,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:34,157 INFO L93 Difference]: Finished difference Result 1135 states and 1830 transitions. [2021-11-12 23:35:34,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:35:34,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 140 [2021-11-12 23:35:34,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:34,164 INFO L225 Difference]: With dead ends: 1135 [2021-11-12 23:35:34,164 INFO L226 Difference]: Without dead ends: 583 [2021-11-12 23:35:34,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:34,168 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 69 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2606 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.65ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 118.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:34,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2606 Invalid, 54 Unknown, 0 Unchecked, 4.65ms Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 118.92ms Time] [2021-11-12 23:35:34,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-12 23:35:34,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-12 23:35:34,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 457 states have (on average 1.6170678336980306) internal successors, (739), 476 states have internal predecessors, (739), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:35:34,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 932 transitions. [2021-11-12 23:35:34,193 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 932 transitions. Word has length 140 [2021-11-12 23:35:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:34,193 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 932 transitions. [2021-11-12 23:35:34,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:34,194 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 932 transitions. [2021-11-12 23:35:34,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-12 23:35:34,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:34,199 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:35:34,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:34,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:34,420 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:34,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:34,420 INFO L85 PathProgramCache]: Analyzing trace with hash 19243735, now seen corresponding path program 1 times [2021-11-12 23:35:34,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:34,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [69505398] [2021-11-12 23:35:34,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:34,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:34,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:34,422 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:34,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:35:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:34,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:35:34,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:35:35,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:35,575 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 23:35:35,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:35,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [69505398] [2021-11-12 23:35:35,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [69505398] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:35,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:35:35,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:35:35,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204820349] [2021-11-12 23:35:35,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:35,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:35:35,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:35,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:35:35,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:35:35,578 INFO L87 Difference]: Start difference. First operand 583 states and 932 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:35,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:35,702 INFO L93 Difference]: Finished difference Result 1135 states and 1829 transitions. [2021-11-12 23:35:35,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:35:35,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 141 [2021-11-12 23:35:35,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:35,709 INFO L225 Difference]: With dead ends: 1135 [2021-11-12 23:35:35,710 INFO L226 Difference]: Without dead ends: 583 [2021-11-12 23:35:35,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:35:35,714 INFO L933 BasicCegarLoop]: 898 mSDtfsCounter, 67 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2606 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.84ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.41ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:35,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2606 Invalid, 52 Unknown, 0 Unchecked, 4.84ms Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 86.41ms Time] [2021-11-12 23:35:35,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-12 23:35:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-12 23:35:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 457 states have (on average 1.6148796498905909) internal successors, (738), 476 states have internal predecessors, (738), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:35:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 931 transitions. [2021-11-12 23:35:35,737 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 931 transitions. Word has length 141 [2021-11-12 23:35:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:35,738 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 931 transitions. [2021-11-12 23:35:35,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:35:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 931 transitions. [2021-11-12 23:35:35,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 23:35:35,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:35,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:35:35,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:35,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:35,964 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:35,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:35,964 INFO L85 PathProgramCache]: Analyzing trace with hash -702093632, now seen corresponding path program 1 times [2021-11-12 23:35:35,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:35,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825198840] [2021-11-12 23:35:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:35,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:35,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:35,966 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:35,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:35:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:36,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:35:36,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:35:36,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:35:37,411 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:37,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825198840] [2021-11-12 23:35:37,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825198840] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:37,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:35:37,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:35:37,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458970015] [2021-11-12 23:35:37,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:37,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:35:37,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:37,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:35:37,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:35:37,414 INFO L87 Difference]: Start difference. First operand 583 states and 931 transitions. Second operand has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 23:35:37,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:37,685 INFO L93 Difference]: Finished difference Result 1140 states and 1836 transitions. [2021-11-12 23:35:37,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:35:37,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 142 [2021-11-12 23:35:37,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:37,693 INFO L225 Difference]: With dead ends: 1140 [2021-11-12 23:35:37,693 INFO L226 Difference]: Without dead ends: 594 [2021-11-12 23:35:37,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:35:37,700 INFO L933 BasicCegarLoop]: 873 mSDtfsCounter, 109 mSDsluCounter, 5174 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 159.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6047 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.32ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 192.40ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:37,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 6047 Invalid, 152 Unknown, 0 Unchecked, 10.32ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 192.40ms Time] [2021-11-12 23:35:37,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-11-12 23:35:37,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 585. [2021-11-12 23:35:37,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 459 states have (on average 1.6100217864923747) internal successors, (739), 478 states have internal predecessors, (739), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:35:37,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 932 transitions. [2021-11-12 23:35:37,730 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 932 transitions. Word has length 142 [2021-11-12 23:35:37,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:37,731 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 932 transitions. [2021-11-12 23:35:37,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 23:35:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 932 transitions. [2021-11-12 23:35:37,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-12 23:35:37,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:37,739 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:35:37,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:37,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:37,964 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:37,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:37,964 INFO L85 PathProgramCache]: Analyzing trace with hash -692040062, now seen corresponding path program 1 times [2021-11-12 23:35:37,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:37,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960750770] [2021-11-12 23:35:37,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:37,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:37,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:37,966 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:37,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:35:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:38,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:35:38,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 23:35:38,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:35:39,556 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:39,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960750770] [2021-11-12 23:35:39,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960750770] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:39,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:35:39,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-12 23:35:39,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003889368] [2021-11-12 23:35:39,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:39,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:35:39,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:35:39,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:35:39,558 INFO L87 Difference]: Start difference. First operand 585 states and 932 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 23:35:39,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:39,855 INFO L93 Difference]: Finished difference Result 1132 states and 1817 transitions. [2021-11-12 23:35:39,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:35:39,857 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 143 [2021-11-12 23:35:39,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:39,863 INFO L225 Difference]: With dead ends: 1132 [2021-11-12 23:35:39,863 INFO L226 Difference]: Without dead ends: 590 [2021-11-12 23:35:39,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:35:39,868 INFO L933 BasicCegarLoop]: 875 mSDtfsCounter, 77 mSDsluCounter, 5180 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 183.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6055 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.54ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 213.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:39,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 6055 Invalid, 152 Unknown, 0 Unchecked, 10.54ms Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 213.30ms Time] [2021-11-12 23:35:39,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-11-12 23:35:39,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 587. [2021-11-12 23:35:39,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 461 states have (on average 1.6052060737527114) internal successors, (740), 480 states have internal predecessors, (740), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:35:39,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 933 transitions. [2021-11-12 23:35:39,896 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 933 transitions. Word has length 143 [2021-11-12 23:35:39,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:39,896 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 933 transitions. [2021-11-12 23:35:39,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-12 23:35:39,897 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 933 transitions. [2021-11-12 23:35:39,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-12 23:35:39,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:39,903 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 23:35:39,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:40,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:40,124 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:40,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:40,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1806094774, now seen corresponding path program 1 times [2021-11-12 23:35:40,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:40,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575596173] [2021-11-12 23:35:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:40,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:40,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:40,126 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:40,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:35:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:40,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:35:40,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:35:41,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:35:41,581 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:41,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575596173] [2021-11-12 23:35:41,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575596173] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:41,582 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:35:41,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:35:41,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006591830] [2021-11-12 23:35:41,582 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:41,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:35:41,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:41,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:35:41,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:35:41,583 INFO L87 Difference]: Start difference. First operand 587 states and 933 transitions. Second operand has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:35:41,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:41,789 INFO L93 Difference]: Finished difference Result 1078 states and 1744 transitions. [2021-11-12 23:35:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:35:41,791 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 144 [2021-11-12 23:35:41,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:41,796 INFO L225 Difference]: With dead ends: 1078 [2021-11-12 23:35:41,796 INFO L226 Difference]: Without dead ends: 580 [2021-11-12 23:35:41,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:35:41,801 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 55 mSDsluCounter, 5253 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 6140 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.22ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 120.51ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:41,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 6140 Invalid, 96 Unknown, 0 Unchecked, 43.22ms Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 120.51ms Time] [2021-11-12 23:35:41,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-12 23:35:41,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2021-11-12 23:35:41,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 454 states have (on average 1.6123348017621146) internal successors, (732), 473 states have internal predecessors, (732), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:35:41,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 925 transitions. [2021-11-12 23:35:41,825 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 925 transitions. Word has length 144 [2021-11-12 23:35:41,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:41,826 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 925 transitions. [2021-11-12 23:35:41,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:35:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 925 transitions. [2021-11-12 23:35:41,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-12 23:35:41,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:41,831 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] [2021-11-12 23:35:41,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:42,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:42,048 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:42,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:42,048 INFO L85 PathProgramCache]: Analyzing trace with hash -396347874, now seen corresponding path program 1 times [2021-11-12 23:35:42,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:42,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476863937] [2021-11-12 23:35:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:42,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:42,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:42,050 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:42,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:35:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:42,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:35:42,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:35:42,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:35:43,338 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:43,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476863937] [2021-11-12 23:35:43,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476863937] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:43,339 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:35:43,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:35:43,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450802989] [2021-11-12 23:35:43,339 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:43,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:35:43,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:43,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:35:43,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:35:43,341 INFO L87 Difference]: Start difference. First operand 580 states and 925 transitions. Second operand has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:35:43,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:43,512 INFO L93 Difference]: Finished difference Result 1083 states and 1758 transitions. [2021-11-12 23:35:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:35:43,513 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 145 [2021-11-12 23:35:43,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:43,518 INFO L225 Difference]: With dead ends: 1083 [2021-11-12 23:35:43,518 INFO L226 Difference]: Without dead ends: 577 [2021-11-12 23:35:43,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:35:43,522 INFO L933 BasicCegarLoop]: 879 mSDtfsCounter, 98 mSDsluCounter, 6049 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 6928 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.45ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:43,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 6928 Invalid, 92 Unknown, 0 Unchecked, 9.45ms Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 122.05ms Time] [2021-11-12 23:35:43,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-12 23:35:43,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2021-11-12 23:35:43,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 451 states have (on average 1.6119733924611974) internal successors, (727), 470 states have internal predecessors, (727), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:35:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 920 transitions. [2021-11-12 23:35:43,548 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 920 transitions. Word has length 145 [2021-11-12 23:35:43,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:43,549 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 920 transitions. [2021-11-12 23:35:43,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:35:43,549 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 920 transitions. [2021-11-12 23:35:43,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-12 23:35:43,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:43,555 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:35:43,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:43,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:43,768 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:43,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:43,768 INFO L85 PathProgramCache]: Analyzing trace with hash 598987422, now seen corresponding path program 1 times [2021-11-12 23:35:43,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:43,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063492104] [2021-11-12 23:35:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:43,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:43,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:43,770 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:43,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:35:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:44,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:35:44,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:35:44,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:35:45,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:45,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063492104] [2021-11-12 23:35:45,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063492104] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:45,176 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:35:45,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:35:45,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627285070] [2021-11-12 23:35:45,177 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:45,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:35:45,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:45,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:35:45,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:35:45,179 INFO L87 Difference]: Start difference. First operand 577 states and 920 transitions. Second operand has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 23:35:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:45,326 INFO L93 Difference]: Finished difference Result 1080 states and 1753 transitions. [2021-11-12 23:35:45,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:35:45,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 145 [2021-11-12 23:35:45,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:45,333 INFO L225 Difference]: With dead ends: 1080 [2021-11-12 23:35:45,333 INFO L226 Difference]: Without dead ends: 569 [2021-11-12 23:35:45,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:35:45,336 INFO L933 BasicCegarLoop]: 878 mSDtfsCounter, 142 mSDsluCounter, 4327 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 94.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 5205 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.42ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 109.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:45,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 5205 Invalid, 68 Unknown, 0 Unchecked, 6.42ms Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 109.03ms Time] [2021-11-12 23:35:45,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-12 23:35:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2021-11-12 23:35:45,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 443 states have (on average 1.6162528216704288) internal successors, (716), 462 states have internal predecessors, (716), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:35:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 909 transitions. [2021-11-12 23:35:45,360 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 909 transitions. Word has length 145 [2021-11-12 23:35:45,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:45,360 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 909 transitions. [2021-11-12 23:35:45,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 23:35:45,361 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 909 transitions. [2021-11-12 23:35:45,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-12 23:35:45,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:45,366 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:35:45,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:45,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:45,587 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:45,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:45,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1606904338, now seen corresponding path program 1 times [2021-11-12 23:35:45,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:45,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726190842] [2021-11-12 23:35:45,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:45,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:45,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:45,589 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:45,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:35:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:46,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:35:46,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:35:46,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:35:46,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:46,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726190842] [2021-11-12 23:35:46,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726190842] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:46,955 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:35:46,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:35:46,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131413494] [2021-11-12 23:35:46,955 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:46,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:35:46,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:46,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:35:46,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:35:46,957 INFO L87 Difference]: Start difference. First operand 569 states and 909 transitions. Second operand has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:35:47,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:47,122 INFO L93 Difference]: Finished difference Result 1066 states and 1731 transitions. [2021-11-12 23:35:47,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:35:47,124 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 146 [2021-11-12 23:35:47,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:47,128 INFO L225 Difference]: With dead ends: 1066 [2021-11-12 23:35:47,128 INFO L226 Difference]: Without dead ends: 569 [2021-11-12 23:35:47,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:35:47,132 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 100 mSDsluCounter, 6030 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 6904 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.63ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 112.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:47,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 6904 Invalid, 125 Unknown, 0 Unchecked, 7.63ms Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 112.07ms Time] [2021-11-12 23:35:47,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-11-12 23:35:47,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2021-11-12 23:35:47,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 443 states have (on average 1.6139954853273137) internal successors, (715), 462 states have internal predecessors, (715), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:35:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 908 transitions. [2021-11-12 23:35:47,153 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 908 transitions. Word has length 146 [2021-11-12 23:35:47,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:47,153 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 908 transitions. [2021-11-12 23:35:47,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:35:47,154 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 908 transitions. [2021-11-12 23:35:47,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-12 23:35:47,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:47,158 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] [2021-11-12 23:35:47,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:47,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:47,380 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:47,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:47,380 INFO L85 PathProgramCache]: Analyzing trace with hash 896794396, now seen corresponding path program 1 times [2021-11-12 23:35:47,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:47,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468925828] [2021-11-12 23:35:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:47,381 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:47,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:47,382 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:47,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 23:35:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:47,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:35:47,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:35:48,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:35:48,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:48,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468925828] [2021-11-12 23:35:48,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468925828] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:48,722 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:35:48,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:35:48,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642231111] [2021-11-12 23:35:48,722 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:48,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:35:48,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:48,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:35:48,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:35:48,724 INFO L87 Difference]: Start difference. First operand 569 states and 908 transitions. Second operand has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:35:49,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:49,072 INFO L93 Difference]: Finished difference Result 1110 states and 1788 transitions. [2021-11-12 23:35:49,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:35:49,074 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 147 [2021-11-12 23:35:49,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:49,079 INFO L225 Difference]: With dead ends: 1110 [2021-11-12 23:35:49,080 INFO L226 Difference]: Without dead ends: 566 [2021-11-12 23:35:49,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:35:49,084 INFO L933 BasicCegarLoop]: 862 mSDtfsCounter, 127 mSDsluCounter, 6835 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 198.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 7697 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.74ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 220.05ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:49,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 7697 Invalid, 137 Unknown, 0 Unchecked, 10.74ms Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 220.05ms Time] [2021-11-12 23:35:49,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-12 23:35:49,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2021-11-12 23:35:49,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 440 states have (on average 1.606818181818182) internal successors, (707), 459 states have internal predecessors, (707), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:35:49,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 900 transitions. [2021-11-12 23:35:49,109 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 900 transitions. Word has length 147 [2021-11-12 23:35:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:49,109 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 900 transitions. [2021-11-12 23:35:49,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:35:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 900 transitions. [2021-11-12 23:35:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-12 23:35:49,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:49,116 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:35:49,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:49,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:49,332 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:49,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:49,332 INFO L85 PathProgramCache]: Analyzing trace with hash -549200077, now seen corresponding path program 1 times [2021-11-12 23:35:49,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:49,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1648922712] [2021-11-12 23:35:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:49,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:49,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:49,334 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:49,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:35:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:49,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:35:49,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:35:50,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:35:50,817 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:50,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1648922712] [2021-11-12 23:35:50,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1648922712] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:50,817 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:35:50,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:35:50,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629537603] [2021-11-12 23:35:50,818 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:50,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:35:50,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:50,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:35:50,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:35:50,820 INFO L87 Difference]: Start difference. First operand 566 states and 900 transitions. Second operand has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:35:51,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:51,112 INFO L93 Difference]: Finished difference Result 1057 states and 1711 transitions. [2021-11-12 23:35:51,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:35:51,116 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 148 [2021-11-12 23:35:51,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:51,122 INFO L225 Difference]: With dead ends: 1057 [2021-11-12 23:35:51,122 INFO L226 Difference]: Without dead ends: 566 [2021-11-12 23:35:51,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:35:51,129 INFO L933 BasicCegarLoop]: 863 mSDtfsCounter, 69 mSDsluCounter, 5976 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 190.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 6839 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.08ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 210.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:51,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 6839 Invalid, 122 Unknown, 0 Unchecked, 10.08ms Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 210.24ms Time] [2021-11-12 23:35:51,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-12 23:35:51,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2021-11-12 23:35:51,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 440 states have (on average 1.6045454545454545) internal successors, (706), 459 states have internal predecessors, (706), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:35:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 899 transitions. [2021-11-12 23:35:51,161 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 899 transitions. Word has length 148 [2021-11-12 23:35:51,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:51,162 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 899 transitions. [2021-11-12 23:35:51,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:35:51,163 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 899 transitions. [2021-11-12 23:35:51,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-12 23:35:51,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:51,169 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] [2021-11-12 23:35:51,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:51,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:51,389 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:51,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:51,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1483735021, now seen corresponding path program 1 times [2021-11-12 23:35:51,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:51,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107564705] [2021-11-12 23:35:51,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:51,391 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:51,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:51,393 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:51,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 23:35:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:52,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:35:52,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:52,408 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:35:52,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:35:52,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:52,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107564705] [2021-11-12 23:35:52,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107564705] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:35:52,918 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:35:52,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:35:52,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072559788] [2021-11-12 23:35:52,918 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:52,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:35:52,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:52,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:35:52,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:35:52,920 INFO L87 Difference]: Start difference. First operand 566 states and 899 transitions. Second operand has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:35:53,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:53,139 INFO L93 Difference]: Finished difference Result 1095 states and 1756 transitions. [2021-11-12 23:35:53,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:35:53,141 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 149 [2021-11-12 23:35:53,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:53,144 INFO L225 Difference]: With dead ends: 1095 [2021-11-12 23:35:53,144 INFO L226 Difference]: Without dead ends: 563 [2021-11-12 23:35:53,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:35:53,148 INFO L933 BasicCegarLoop]: 861 mSDtfsCounter, 114 mSDsluCounter, 6829 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 143.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 7690 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.20ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 159.01ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:53,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 7690 Invalid, 140 Unknown, 0 Unchecked, 7.20ms Time], IncrementalHoareTripleChecker [4 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 159.01ms Time] [2021-11-12 23:35:53,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-12 23:35:53,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2021-11-12 23:35:53,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 437 states have (on average 1.597254004576659) internal successors, (698), 456 states have internal predecessors, (698), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-12 23:35:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 891 transitions. [2021-11-12 23:35:53,169 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 891 transitions. Word has length 149 [2021-11-12 23:35:53,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:53,170 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 891 transitions. [2021-11-12 23:35:53,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-12 23:35:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 891 transitions. [2021-11-12 23:35:53,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 23:35:53,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:53,175 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] [2021-11-12 23:35:53,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:35:53,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:35:53,389 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:35:53,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:35:53,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1244870456, now seen corresponding path program 1 times [2021-11-12 23:35:53,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:35:53,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488170012] [2021-11-12 23:35:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:35:53,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:35:53,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:35:53,391 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:35:53,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:35:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:35:53,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:35:53,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:35:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:35:54,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:35:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:35:54,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:35:54,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488170012] [2021-11-12 23:35:54,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488170012] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:35:54,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:35:54,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:35:54,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574085508] [2021-11-12 23:35:54,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:35:54,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:35:54,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:35:54,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:35:54,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:35:54,813 INFO L87 Difference]: Start difference. First operand 563 states and 891 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:35:56,846 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:58,852 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:35:59,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:35:59,902 INFO L93 Difference]: Finished difference Result 1050 states and 1720 transitions. [2021-11-12 23:35:59,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:35:59,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 150 [2021-11-12 23:35:59,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:35:59,908 INFO L225 Difference]: With dead ends: 1050 [2021-11-12 23:35:59,908 INFO L226 Difference]: Without dead ends: 567 [2021-11-12 23:35:59,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:35:59,912 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 795 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4871.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.74ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5008.84ms IncrementalHoareTripleChecker+Time [2021-11-12 23:35:59,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [813 Valid, 2187 Invalid, 449 Unknown, 0 Unchecked, 16.74ms Time], IncrementalHoareTripleChecker [16 Valid, 431 Invalid, 2 Unknown, 0 Unchecked, 5008.84ms Time] [2021-11-12 23:35:59,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-12 23:35:59,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2021-11-12 23:35:59,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 440 states have (on average 1.5931818181818183) internal successors, (701), 459 states have internal predecessors, (701), 99 states have call successors, (99), 28 states have call predecessors, (99), 27 states have return successors, (95), 92 states have call predecessors, (95), 94 states have call successors, (95) [2021-11-12 23:35:59,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 895 transitions. [2021-11-12 23:35:59,944 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 895 transitions. Word has length 150 [2021-11-12 23:35:59,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:35:59,945 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 895 transitions. [2021-11-12 23:35:59,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:35:59,945 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 895 transitions. [2021-11-12 23:35:59,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-12 23:35:59,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:35:59,951 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] [2021-11-12 23:35:59,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:36:00,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:36:00,176 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:00,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:00,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1610470090, now seen corresponding path program 1 times [2021-11-12 23:36:00,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:36:00,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041315094] [2021-11-12 23:36:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:00,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:36:00,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:36:00,178 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:36:00,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 23:36:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:00,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:36:00,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:36:01,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:36:02,093 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:36:02,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041315094] [2021-11-12 23:36:02,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041315094] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:36:02,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:36:02,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:36:02,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695186466] [2021-11-12 23:36:02,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:02,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:36:02,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:36:02,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:36:02,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:36:02,096 INFO L87 Difference]: Start difference. First operand 567 states and 895 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:36:04,126 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:06,130 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:06,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:06,986 INFO L93 Difference]: Finished difference Result 1059 states and 1727 transitions. [2021-11-12 23:36:06,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:36:06,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 152 [2021-11-12 23:36:06,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:06,991 INFO L225 Difference]: With dead ends: 1059 [2021-11-12 23:36:06,991 INFO L226 Difference]: Without dead ends: 572 [2021-11-12 23:36:06,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:36:06,994 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 802 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4693.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.42ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4834.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:06,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [819 Valid, 2188 Invalid, 451 Unknown, 0 Unchecked, 8.42ms Time], IncrementalHoareTripleChecker [14 Valid, 435 Invalid, 2 Unknown, 0 Unchecked, 4834.57ms Time] [2021-11-12 23:36:06,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-12 23:36:07,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 572. [2021-11-12 23:36:07,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 444 states have (on average 1.587837837837838) internal successors, (705), 463 states have internal predecessors, (705), 99 states have call successors, (99), 29 states have call predecessors, (99), 28 states have return successors, (96), 92 states have call predecessors, (96), 94 states have call successors, (96) [2021-11-12 23:36:07,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 900 transitions. [2021-11-12 23:36:07,018 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 900 transitions. Word has length 152 [2021-11-12 23:36:07,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:07,019 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 900 transitions. [2021-11-12 23:36:07,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:36:07,019 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 900 transitions. [2021-11-12 23:36:07,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-12 23:36:07,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:07,024 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] [2021-11-12 23:36:07,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:36:07,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:36:07,240 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:07,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:07,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1349907192, now seen corresponding path program 1 times [2021-11-12 23:36:07,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:36:07,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978857436] [2021-11-12 23:36:07,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:07,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:36:07,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:36:07,242 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:36:07,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-12 23:36:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:07,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:36:07,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:36:08,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:08,749 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:36:08,750 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:36:08,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978857436] [2021-11-12 23:36:08,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978857436] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:36:08,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:36:08,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:36:08,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97363189] [2021-11-12 23:36:08,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:08,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:36:08,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:36:08,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:36:08,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:36:08,754 INFO L87 Difference]: Start difference. First operand 572 states and 900 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:36:10,789 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:12,795 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:13,869 INFO L93 Difference]: Finished difference Result 1070 states and 1736 transitions. [2021-11-12 23:36:13,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:36:13,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 154 [2021-11-12 23:36:13,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:13,876 INFO L225 Difference]: With dead ends: 1070 [2021-11-12 23:36:13,876 INFO L226 Difference]: Without dead ends: 578 [2021-11-12 23:36:13,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:36:13,881 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 805 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4909.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.98ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5044.57ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:13,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 2188 Invalid, 450 Unknown, 0 Unchecked, 9.98ms Time], IncrementalHoareTripleChecker [12 Valid, 436 Invalid, 2 Unknown, 0 Unchecked, 5044.57ms Time] [2021-11-12 23:36:13,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-11-12 23:36:13,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2021-11-12 23:36:13,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 449 states have (on average 1.581291759465479) internal successors, (710), 468 states have internal predecessors, (710), 99 states have call successors, (99), 30 states have call predecessors, (99), 29 states have return successors, (97), 92 states have call predecessors, (97), 94 states have call successors, (97) [2021-11-12 23:36:13,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 906 transitions. [2021-11-12 23:36:13,950 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 906 transitions. Word has length 154 [2021-11-12 23:36:13,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:13,950 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 906 transitions. [2021-11-12 23:36:13,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:36:13,951 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 906 transitions. [2021-11-12 23:36:13,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-12 23:36:13,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:13,959 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] [2021-11-12 23:36:13,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:36:14,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:36:14,170 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:14,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:14,171 INFO L85 PathProgramCache]: Analyzing trace with hash -318794002, now seen corresponding path program 1 times [2021-11-12 23:36:14,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:36:14,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359068177] [2021-11-12 23:36:14,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:14,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:36:14,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:36:14,173 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:36:14,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:36:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:14,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:36:14,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:36:15,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:36:15,879 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:36:15,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359068177] [2021-11-12 23:36:15,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359068177] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:36:15,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:36:15,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:36:15,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978245762] [2021-11-12 23:36:15,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:15,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:36:15,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:36:15,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:36:15,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:36:15,882 INFO L87 Difference]: Start difference. First operand 578 states and 906 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:36:17,923 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:19,929 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:20,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:20,787 INFO L93 Difference]: Finished difference Result 1083 states and 1747 transitions. [2021-11-12 23:36:20,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:36:20,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 156 [2021-11-12 23:36:20,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:20,791 INFO L225 Difference]: With dead ends: 1083 [2021-11-12 23:36:20,791 INFO L226 Difference]: Without dead ends: 585 [2021-11-12 23:36:20,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:36:20,794 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 797 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4734.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.84ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4851.46ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:20,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 2188 Invalid, 449 Unknown, 0 Unchecked, 6.84ms Time], IncrementalHoareTripleChecker [10 Valid, 437 Invalid, 2 Unknown, 0 Unchecked, 4851.46ms Time] [2021-11-12 23:36:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-11-12 23:36:20,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 585. [2021-11-12 23:36:20,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 455 states have (on average 1.5736263736263736) internal successors, (716), 474 states have internal predecessors, (716), 99 states have call successors, (99), 31 states have call predecessors, (99), 30 states have return successors, (98), 92 states have call predecessors, (98), 94 states have call successors, (98) [2021-11-12 23:36:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 913 transitions. [2021-11-12 23:36:20,818 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 913 transitions. Word has length 156 [2021-11-12 23:36:20,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:20,818 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 913 transitions. [2021-11-12 23:36:20,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:36:20,819 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 913 transitions. [2021-11-12 23:36:20,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-12 23:36:20,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:20,823 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] [2021-11-12 23:36:20,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:36:21,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:36:21,040 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:21,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:21,040 INFO L85 PathProgramCache]: Analyzing trace with hash 604279128, now seen corresponding path program 1 times [2021-11-12 23:36:21,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:36:21,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [803095750] [2021-11-12 23:36:21,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:21,041 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:36:21,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:36:21,042 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:36:21,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 23:36:21,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:21,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:36:21,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:36:21,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:36:22,542 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:36:22,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [803095750] [2021-11-12 23:36:22,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [803095750] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:36:22,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:36:22,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-12 23:36:22,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077591643] [2021-11-12 23:36:22,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:22,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:36:22,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:36:22,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:36:22,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:36:22,544 INFO L87 Difference]: Start difference. First operand 585 states and 913 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:36:24,573 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:26,579 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:27,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:27,439 INFO L93 Difference]: Finished difference Result 1092 states and 1749 transitions. [2021-11-12 23:36:27,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:36:27,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 158 [2021-11-12 23:36:27,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:27,445 INFO L225 Difference]: With dead ends: 1092 [2021-11-12 23:36:27,445 INFO L226 Difference]: Without dead ends: 587 [2021-11-12 23:36:27,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:36:27,449 INFO L933 BasicCegarLoop]: 848 mSDtfsCounter, 786 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4722.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.88ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4842.18ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:27,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 2187 Invalid, 445 Unknown, 0 Unchecked, 6.88ms Time], IncrementalHoareTripleChecker [19 Valid, 424 Invalid, 2 Unknown, 0 Unchecked, 4842.18ms Time] [2021-11-12 23:36:27,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-11-12 23:36:27,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2021-11-12 23:36:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 456 states have (on average 1.5723684210526316) internal successors, (717), 476 states have internal predecessors, (717), 99 states have call successors, (99), 31 states have call predecessors, (99), 31 states have return successors, (99), 92 states have call predecessors, (99), 94 states have call successors, (99) [2021-11-12 23:36:27,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 915 transitions. [2021-11-12 23:36:27,491 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 915 transitions. Word has length 158 [2021-11-12 23:36:27,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:27,492 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 915 transitions. [2021-11-12 23:36:27,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:36:27,492 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 915 transitions. [2021-11-12 23:36:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-12 23:36:27,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:27,496 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] [2021-11-12 23:36:27,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-12 23:36:27,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:36:27,713 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:27,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:27,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1551819592, now seen corresponding path program 1 times [2021-11-12 23:36:27,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:36:27,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78514922] [2021-11-12 23:36:27,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:27,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:36:27,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:36:27,717 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:36:27,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 23:36:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:28,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:36:28,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:36:29,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:36:30,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:36:30,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78514922] [2021-11-12 23:36:30,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78514922] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:36:30,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1954027057] [2021-11-12 23:36:30,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:30,312 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:36:30,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:36:30,317 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:36:30,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-12 23:36:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:30,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:36:30,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 23:36:31,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-12 23:36:32,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1954027057] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:36:32,191 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:36:32,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-12 23:36:32,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631532875] [2021-11-12 23:36:32,191 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:36:32,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:36:32,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:36:32,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:36:32,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:36:32,193 INFO L87 Difference]: Start difference. First operand 587 states and 915 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 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) [2021-11-12 23:36:34,212 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:34,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:36:34,831 INFO L93 Difference]: Finished difference Result 1090 states and 1737 transitions. [2021-11-12 23:36:34,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:36:34,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 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 158 [2021-11-12 23:36:34,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:36:34,835 INFO L225 Difference]: With dead ends: 1090 [2021-11-12 23:36:34,835 INFO L226 Difference]: Without dead ends: 583 [2021-11-12 23:36:34,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:36:34,838 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 1910 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 529 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2470.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1910 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.79ms SdHoareTripleChecker+Time, 529 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2587.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:36:34,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1910 Valid, 789 Invalid, 630 Unknown, 0 Unchecked, 4.79ms Time], IncrementalHoareTripleChecker [529 Valid, 100 Invalid, 1 Unknown, 0 Unchecked, 2587.93ms Time] [2021-11-12 23:36:34,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-11-12 23:36:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2021-11-12 23:36:34,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 454 states have (on average 1.5682819383259912) internal successors, (712), 473 states have internal predecessors, (712), 97 states have call successors, (97), 31 states have call predecessors, (97), 31 states have return successors, (98), 91 states have call predecessors, (98), 93 states have call successors, (98) [2021-11-12 23:36:34,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 907 transitions. [2021-11-12 23:36:34,865 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 907 transitions. Word has length 158 [2021-11-12 23:36:34,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:36:34,865 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 907 transitions. [2021-11-12 23:36:34,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 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) [2021-11-12 23:36:34,866 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 907 transitions. [2021-11-12 23:36:34,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-12 23:36:34,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:36:34,869 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] [2021-11-12 23:36:34,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-12 23:36:35,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-12 23:36:35,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:36:35,273 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:36:35,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:36:35,273 INFO L85 PathProgramCache]: Analyzing trace with hash -861911061, now seen corresponding path program 1 times [2021-11-12 23:36:35,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:36:35,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406237892] [2021-11-12 23:36:35,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:35,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:36:35,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:36:35,275 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:36:35,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 23:36:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:35,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:36:35,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:36:36,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:36:37,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:36:37,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406237892] [2021-11-12 23:36:37,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406237892] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:36:37,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1275006000] [2021-11-12 23:36:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:37,416 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:36:37,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:36:37,417 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:36:37,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-12 23:36:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:37,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:36:37,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:36:38,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:36:39,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1275006000] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:36:39,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778937800] [2021-11-12 23:36:39,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:36:39,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:36:39,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:36:39,513 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:36:39,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-12 23:36:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:36:39,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:36:39,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:36:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:36:40,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:36:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-12 23:36:41,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778937800] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:36:41,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:36:41,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-12 23:36:41,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767476157] [2021-11-12 23:36:41,488 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:36:41,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:36:41,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:36:41,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:36:41,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:36:41,490 INFO L87 Difference]: Start difference. First operand 583 states and 907 transitions. Second operand has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 23:36:43,519 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:45,526 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:47,533 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:49,538 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:51,544 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:53,550 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:36:55,555 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:06,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:37:06,101 INFO L93 Difference]: Finished difference Result 1709 states and 2750 transitions. [2021-11-12 23:37:06,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:37:06,103 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) Word has length 159 [2021-11-12 23:37:06,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:37:06,111 INFO L225 Difference]: With dead ends: 1709 [2021-11-12 23:37:06,111 INFO L226 Difference]: Without dead ends: 1206 [2021-11-12 23:37:06,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 934 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:37:06,116 INFO L933 BasicCegarLoop]: 1628 mSDtfsCounter, 4680 mSDsluCounter, 4800 mSDsCounter, 0 mSdLazyCounter, 9187 mSolverCounterSat, 1455 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22779.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4705 SdHoareTripleChecker+Valid, 6428 SdHoareTripleChecker+Invalid, 10649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 59.56ms SdHoareTripleChecker+Time, 1455 IncrementalHoareTripleChecker+Valid, 9187 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24132.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:37:06,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4705 Valid, 6428 Invalid, 10649 Unknown, 0 Unchecked, 59.56ms Time], IncrementalHoareTripleChecker [1455 Valid, 9187 Invalid, 7 Unknown, 0 Unchecked, 24132.30ms Time] [2021-11-12 23:37:06,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-11-12 23:37:06,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1192. [2021-11-12 23:37:06,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 908 states have (on average 1.592511013215859) internal successors, (1446), 949 states have internal predecessors, (1446), 222 states have call successors, (222), 55 states have call predecessors, (222), 61 states have return successors, (240), 218 states have call predecessors, (240), 218 states have call successors, (240) [2021-11-12 23:37:06,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1908 transitions. [2021-11-12 23:37:06,233 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1908 transitions. Word has length 159 [2021-11-12 23:37:06,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:37:06,234 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 1908 transitions. [2021-11-12 23:37:06,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 23:37:06,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1908 transitions. [2021-11-12 23:37:06,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-12 23:37:06,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:37:06,242 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] [2021-11-12 23:37:06,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-12 23:37:06,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2021-11-12 23:37:06,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-12 23:37:06,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:37:06,857 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:37:06,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:37:06,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1378524794, now seen corresponding path program 1 times [2021-11-12 23:37:06,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:37:06,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93139718] [2021-11-12 23:37:06,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:06,859 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:37:06,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:37:06,860 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:37:06,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 23:37:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:07,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:37:07,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:37:07,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:37:08,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:37:08,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93139718] [2021-11-12 23:37:08,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93139718] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:37:08,466 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:37:08,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 23:37:08,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505598809] [2021-11-12 23:37:08,466 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:37:08,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:37:08,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:37:08,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:37:08,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:37:08,468 INFO L87 Difference]: Start difference. First operand 1192 states and 1908 transitions. Second operand has 10 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 23:37:08,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:37:08,686 INFO L93 Difference]: Finished difference Result 1698 states and 2726 transitions. [2021-11-12 23:37:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:37:08,688 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 161 [2021-11-12 23:37:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:37:08,693 INFO L225 Difference]: With dead ends: 1698 [2021-11-12 23:37:08,693 INFO L226 Difference]: Without dead ends: 576 [2021-11-12 23:37:08,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:37:08,700 INFO L933 BasicCegarLoop]: 844 mSDtfsCounter, 112 mSDsluCounter, 5008 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 124.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 5852 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.67ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 138.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:37:08,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 5852 Invalid, 98 Unknown, 0 Unchecked, 5.67ms Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 138.92ms Time] [2021-11-12 23:37:08,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-11-12 23:37:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2021-11-12 23:37:08,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 449 states have (on average 1.5634743875278396) internal successors, (702), 468 states have internal predecessors, (702), 95 states have call successors, (95), 31 states have call predecessors, (95), 31 states have return successors, (96), 89 states have call predecessors, (96), 91 states have call successors, (96) [2021-11-12 23:37:08,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 893 transitions. [2021-11-12 23:37:08,728 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 893 transitions. Word has length 161 [2021-11-12 23:37:08,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:37:08,729 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 893 transitions. [2021-11-12 23:37:08,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-12 23:37:08,729 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 893 transitions. [2021-11-12 23:37:08,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-12 23:37:08,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:37:08,732 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] [2021-11-12 23:37:08,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-12 23:37:08,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:37:08,948 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:37:08,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:37:08,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1629577450, now seen corresponding path program 1 times [2021-11-12 23:37:08,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:37:08,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139531695] [2021-11-12 23:37:08,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:08,949 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:37:08,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:37:08,950 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:37:08,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-12 23:37:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:09,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:37:09,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:37:10,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:37:11,087 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:37:11,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139531695] [2021-11-12 23:37:11,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139531695] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:37:11,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1754651405] [2021-11-12 23:37:11,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:11,087 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:37:11,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:37:11,091 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:37:11,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-12 23:37:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:11,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:37:11,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:37:12,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:37:12,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1754651405] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:37:12,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112515357] [2021-11-12 23:37:12,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:12,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:37:12,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:37:12,929 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:37:12,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-12 23:37:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:13,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 1079 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 23:37:13,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:37:13,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:37:14,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112515357] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:37:14,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:37:14,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-12 23:37:14,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370128191] [2021-11-12 23:37:14,551 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:37:14,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:37:14,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:37:14,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:37:14,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:37:14,553 INFO L87 Difference]: Start difference. First operand 576 states and 893 transitions. Second operand has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 23:37:16,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:18,603 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:20,610 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:22,615 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:25,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:37:25,197 INFO L93 Difference]: Finished difference Result 1078 states and 1710 transitions. [2021-11-12 23:37:25,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:37:25,203 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) Word has length 165 [2021-11-12 23:37:25,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:37:25,207 INFO L225 Difference]: With dead ends: 1078 [2021-11-12 23:37:25,207 INFO L226 Difference]: Without dead ends: 580 [2021-11-12 23:37:25,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 974 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:37:25,210 INFO L933 BasicCegarLoop]: 762 mSDtfsCounter, 1327 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 2312 mSolverCounterSat, 365 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10159.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1327 SdHoareTripleChecker+Valid, 1968 SdHoareTripleChecker+Invalid, 2681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.80ms SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 2312 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10504.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:37:25,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1327 Valid, 1968 Invalid, 2681 Unknown, 0 Unchecked, 14.80ms Time], IncrementalHoareTripleChecker [365 Valid, 2312 Invalid, 4 Unknown, 0 Unchecked, 10504.22ms Time] [2021-11-12 23:37:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-12 23:37:25,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 578. [2021-11-12 23:37:25,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 451 states have (on average 1.5609756097560976) internal successors, (704), 469 states have internal predecessors, (704), 95 states have call successors, (95), 31 states have call predecessors, (95), 31 states have return successors, (96), 90 states have call predecessors, (96), 91 states have call successors, (96) [2021-11-12 23:37:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 895 transitions. [2021-11-12 23:37:25,271 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 895 transitions. Word has length 165 [2021-11-12 23:37:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:37:25,271 INFO L470 AbstractCegarLoop]: Abstraction has 578 states and 895 transitions. [2021-11-12 23:37:25,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-12 23:37:25,272 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 895 transitions. [2021-11-12 23:37:25,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-12 23:37:25,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:37:25,275 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] [2021-11-12 23:37:25,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-12 23:37:25,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-12 23:37:25,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2021-11-12 23:37:25,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:37:25,889 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:37:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:37:25,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1821259940, now seen corresponding path program 1 times [2021-11-12 23:37:25,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:37:25,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166497464] [2021-11-12 23:37:25,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:25,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:37:25,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:37:25,891 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:37:25,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-12 23:37:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:26,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:37:26,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:37:26,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:37:27,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:37:27,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166497464] [2021-11-12 23:37:27,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166497464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:37:27,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1790864956] [2021-11-12 23:37:27,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:27,554 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:37:27,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:37:27,554 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:37:27,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-12 23:37:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:27,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:37:27,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:37:28,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:37:29,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1790864956] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:37:29,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002854039] [2021-11-12 23:37:29,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:29,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:37:29,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:37:29,039 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:37:29,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-12 23:37:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:29,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 1080 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:37:29,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:37:29,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-12 23:37:30,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002854039] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:37:30,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:37:30,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-12 23:37:30,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028790318] [2021-11-12 23:37:30,211 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:37:30,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:37:30,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:37:30,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:37:30,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:37:30,212 INFO L87 Difference]: Start difference. First operand 578 states and 895 transitions. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-12 23:37:32,235 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:34,240 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:41,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:37:41,167 INFO L93 Difference]: Finished difference Result 2071 states and 3327 transitions. [2021-11-12 23:37:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-12 23:37:41,169 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) Word has length 166 [2021-11-12 23:37:41,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:37:41,179 INFO L225 Difference]: With dead ends: 2071 [2021-11-12 23:37:41,179 INFO L226 Difference]: Without dead ends: 1569 [2021-11-12 23:37:41,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 990 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:37:41,183 INFO L933 BasicCegarLoop]: 1364 mSDtfsCounter, 3998 mSDsluCounter, 2133 mSDsCounter, 0 mSdLazyCounter, 4915 mSolverCounterSat, 1127 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9630.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4079 SdHoareTripleChecker+Valid, 3497 SdHoareTripleChecker+Invalid, 6044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.61ms SdHoareTripleChecker+Time, 1127 IncrementalHoareTripleChecker+Valid, 4915 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10547.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:37:41,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4079 Valid, 3497 Invalid, 6044 Unknown, 0 Unchecked, 42.61ms Time], IncrementalHoareTripleChecker [1127 Valid, 4915 Invalid, 2 Unknown, 0 Unchecked, 10547.03ms Time] [2021-11-12 23:37:41,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-11-12 23:37:41,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1513. [2021-11-12 23:37:41,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1173 states have (on average 1.5831202046035806) internal successors, (1857), 1218 states have internal predecessors, (1857), 259 states have call successors, (259), 80 states have call predecessors, (259), 80 states have return successors, (281), 251 states have call predecessors, (281), 255 states have call successors, (281) [2021-11-12 23:37:41,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 2397 transitions. [2021-11-12 23:37:41,285 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 2397 transitions. Word has length 166 [2021-11-12 23:37:41,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:37:41,286 INFO L470 AbstractCegarLoop]: Abstraction has 1513 states and 2397 transitions. [2021-11-12 23:37:41,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-12 23:37:41,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 2397 transitions. [2021-11-12 23:37:41,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-12 23:37:41,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:37:41,290 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] [2021-11-12 23:37:41,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-12 23:37:41,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2021-11-12 23:37:41,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-12 23:37:41,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:37:41,904 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:37:41,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:37:41,905 INFO L85 PathProgramCache]: Analyzing trace with hash 776281684, now seen corresponding path program 1 times [2021-11-12 23:37:41,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:37:41,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1108242955] [2021-11-12 23:37:41,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:37:41,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:37:41,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:37:41,907 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:37:41,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-12 23:37:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:37:42,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:37:42,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:37:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:37:43,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:37:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:37:43,833 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:37:43,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1108242955] [2021-11-12 23:37:43,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1108242955] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:37:43,833 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:37:43,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 23:37:43,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035495235] [2021-11-12 23:37:43,834 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:37:43,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:37:43,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:37:43,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:37:43,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:37:43,836 INFO L87 Difference]: Start difference. First operand 1513 states and 2397 transitions. Second operand has 12 states, 12 states have (on average 16.75) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-12 23:37:45,856 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:47,864 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:49,870 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:51,875 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:37:53,881 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:02,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:02,576 INFO L93 Difference]: Finished difference Result 5359 states and 8808 transitions. [2021-11-12 23:38:02,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:38:02,578 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.75) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) Word has length 168 [2021-11-12 23:38:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:02,610 INFO L225 Difference]: With dead ends: 5359 [2021-11-12 23:38:02,611 INFO L226 Difference]: Without dead ends: 3924 [2021-11-12 23:38:02,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:38:02,620 INFO L933 BasicCegarLoop]: 1692 mSDtfsCounter, 4817 mSDsluCounter, 2557 mSDsCounter, 0 mSdLazyCounter, 6292 mSolverCounterSat, 1670 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17108.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4917 SdHoareTripleChecker+Valid, 4249 SdHoareTripleChecker+Invalid, 7967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 50.37ms SdHoareTripleChecker+Time, 1670 IncrementalHoareTripleChecker+Valid, 6292 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18203.76ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:02,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4917 Valid, 4249 Invalid, 7967 Unknown, 0 Unchecked, 50.37ms Time], IncrementalHoareTripleChecker [1670 Valid, 6292 Invalid, 5 Unknown, 0 Unchecked, 18203.76ms Time] [2021-11-12 23:38:02,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3924 states. [2021-11-12 23:38:02,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3924 to 3470. [2021-11-12 23:38:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3470 states, 2576 states have (on average 1.5811335403726707) internal successors, (4073), 2717 states have internal predecessors, (4073), 728 states have call successors, (728), 152 states have call predecessors, (728), 165 states have return successors, (838), 722 states have call predecessors, (838), 724 states have call successors, (838) [2021-11-12 23:38:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 5639 transitions. [2021-11-12 23:38:02,912 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 5639 transitions. Word has length 168 [2021-11-12 23:38:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:02,913 INFO L470 AbstractCegarLoop]: Abstraction has 3470 states and 5639 transitions. [2021-11-12 23:38:02,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.75) internal successors, (201), 12 states have internal predecessors, (201), 8 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (31), 8 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-12 23:38:02,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 5639 transitions. [2021-11-12 23:38:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-12 23:38:02,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:02,916 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] [2021-11-12 23:38:02,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:03,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:03,132 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:03,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:03,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1398398413, now seen corresponding path program 1 times [2021-11-12 23:38:03,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:03,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935584501] [2021-11-12 23:38:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:03,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:03,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:03,133 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:03,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-12 23:38:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:03,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:38:03,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:38:04,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:38:04,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:04,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935584501] [2021-11-12 23:38:04,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935584501] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:04,787 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:04,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-12 23:38:04,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575731880] [2021-11-12 23:38:04,787 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:04,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-12 23:38:04,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:04,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-12 23:38:04,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:38:04,789 INFO L87 Difference]: Start difference. First operand 3470 states and 5639 transitions. Second operand has 12 states, 12 states have (on average 13.75) internal successors, (165), 12 states have internal predecessors, (165), 8 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2021-11-12 23:38:06,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:08,815 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:15,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:15,952 INFO L93 Difference]: Finished difference Result 9578 states and 15655 transitions. [2021-11-12 23:38:15,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:38:15,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.75) internal successors, (165), 12 states have internal predecessors, (165), 8 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) Word has length 168 [2021-11-12 23:38:15,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:16,036 INFO L225 Difference]: With dead ends: 9578 [2021-11-12 23:38:16,036 INFO L226 Difference]: Without dead ends: 7005 [2021-11-12 23:38:16,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-11-12 23:38:16,048 INFO L933 BasicCegarLoop]: 1027 mSDtfsCounter, 3246 mSDsluCounter, 2168 mSDsCounter, 0 mSdLazyCounter, 5120 mSolverCounterSat, 681 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9588.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3320 SdHoareTripleChecker+Valid, 3195 SdHoareTripleChecker+Invalid, 5803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.90ms SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 5120 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10463.91ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:16,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3320 Valid, 3195 Invalid, 5803 Unknown, 0 Unchecked, 36.90ms Time], IncrementalHoareTripleChecker [681 Valid, 5120 Invalid, 2 Unknown, 0 Unchecked, 10463.91ms Time] [2021-11-12 23:38:16,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7005 states. [2021-11-12 23:38:16,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7005 to 6727. [2021-11-12 23:38:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6727 states, 5025 states have (on average 1.5749253731343285) internal successors, (7914), 5293 states have internal predecessors, (7914), 1350 states have call successors, (1350), 290 states have call predecessors, (1350), 351 states have return successors, (1677), 1345 states have call predecessors, (1677), 1346 states have call successors, (1677) [2021-11-12 23:38:16,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6727 states to 6727 states and 10941 transitions. [2021-11-12 23:38:16,521 INFO L78 Accepts]: Start accepts. Automaton has 6727 states and 10941 transitions. Word has length 168 [2021-11-12 23:38:16,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:16,522 INFO L470 AbstractCegarLoop]: Abstraction has 6727 states and 10941 transitions. [2021-11-12 23:38:16,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.75) internal successors, (165), 12 states have internal predecessors, (165), 8 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2021-11-12 23:38:16,523 INFO L276 IsEmpty]: Start isEmpty. Operand 6727 states and 10941 transitions. [2021-11-12 23:38:16,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-12 23:38:16,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:16,527 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] [2021-11-12 23:38:16,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:16,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:16,753 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:16,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:16,753 INFO L85 PathProgramCache]: Analyzing trace with hash 697507379, now seen corresponding path program 1 times [2021-11-12 23:38:16,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:16,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372736937] [2021-11-12 23:38:16,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:16,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:16,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:16,757 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:16,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-12 23:38:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:17,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 1086 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:38:17,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:38:18,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 23:38:19,362 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:19,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372736937] [2021-11-12 23:38:19,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372736937] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:19,362 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:19,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 18 [2021-11-12 23:38:19,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536673534] [2021-11-12 23:38:19,363 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:19,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:38:19,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:19,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:38:19,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-12 23:38:19,365 INFO L87 Difference]: Start difference. First operand 6727 states and 10941 transitions. Second operand has 18 states, 18 states have (on average 10.0) internal successors, (180), 14 states have internal predecessors, (180), 8 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-12 23:38:21,385 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:23,390 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:25,394 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:27,400 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:29,406 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:31,411 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:33,416 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:35,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:39,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:39,992 INFO L93 Difference]: Finished difference Result 12501 states and 20397 transitions. [2021-11-12 23:38:39,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:38:39,993 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.0) internal successors, (180), 14 states have internal predecessors, (180), 8 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) Word has length 170 [2021-11-12 23:38:39,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:40,039 INFO L225 Difference]: With dead ends: 12501 [2021-11-12 23:38:40,040 INFO L226 Difference]: Without dead ends: 6679 [2021-11-12 23:38:40,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:38:40,062 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 1428 mSDsluCounter, 2691 mSDsCounter, 0 mSdLazyCounter, 4789 mSolverCounterSat, 367 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19524.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1428 SdHoareTripleChecker+Valid, 3450 SdHoareTripleChecker+Invalid, 5164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.39ms SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 4789 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20088.67ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:40,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1428 Valid, 3450 Invalid, 5164 Unknown, 0 Unchecked, 22.39ms Time], IncrementalHoareTripleChecker [367 Valid, 4789 Invalid, 8 Unknown, 0 Unchecked, 20088.67ms Time] [2021-11-12 23:38:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6679 states. [2021-11-12 23:38:40,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6679 to 6679. [2021-11-12 23:38:40,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6679 states, 4999 states have (on average 1.575115023004601) internal successors, (7874), 5263 states have internal predecessors, (7874), 1336 states have call successors, (1336), 286 states have call predecessors, (1336), 343 states have return successors, (1655), 1331 states have call predecessors, (1655), 1332 states have call successors, (1655) [2021-11-12 23:38:40,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6679 states to 6679 states and 10865 transitions. [2021-11-12 23:38:40,753 INFO L78 Accepts]: Start accepts. Automaton has 6679 states and 10865 transitions. Word has length 170 [2021-11-12 23:38:40,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:40,754 INFO L470 AbstractCegarLoop]: Abstraction has 6679 states and 10865 transitions. [2021-11-12 23:38:40,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.0) internal successors, (180), 14 states have internal predecessors, (180), 8 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-12 23:38:40,754 INFO L276 IsEmpty]: Start isEmpty. Operand 6679 states and 10865 transitions. [2021-11-12 23:38:40,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-12 23:38:40,758 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:40,759 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] [2021-11-12 23:38:40,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-12 23:38:40,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:38:40,984 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:38:40,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:38:40,985 INFO L85 PathProgramCache]: Analyzing trace with hash 2058923736, now seen corresponding path program 1 times [2021-11-12 23:38:40,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:38:40,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849892177] [2021-11-12 23:38:40,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:38:40,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:38:40,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:38:40,988 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:38:41,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-12 23:38:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:38:41,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:38:41,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:38:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:38:42,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:38:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:38:43,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:38:43,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849892177] [2021-11-12 23:38:43,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849892177] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:38:43,141 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:38:43,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-12 23:38:43,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904908219] [2021-11-12 23:38:43,141 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:38:43,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 23:38:43,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:38:43,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 23:38:43,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:38:43,143 INFO L87 Difference]: Start difference. First operand 6679 states and 10865 transitions. Second operand has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 7 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) [2021-11-12 23:38:45,164 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:47,170 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:49,174 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:51,182 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:38:58,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:38:58,841 INFO L93 Difference]: Finished difference Result 17733 states and 28871 transitions. [2021-11-12 23:38:58,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:38:58,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 7 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) Word has length 173 [2021-11-12 23:38:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:38:58,918 INFO L225 Difference]: With dead ends: 17733 [2021-11-12 23:38:58,918 INFO L226 Difference]: Without dead ends: 11827 [2021-11-12 23:38:58,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:38:58,948 INFO L933 BasicCegarLoop]: 967 mSDtfsCounter, 3522 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 5624 mSolverCounterSat, 928 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13592.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3599 SdHoareTripleChecker+Valid, 2878 SdHoareTripleChecker+Invalid, 6556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.55ms SdHoareTripleChecker+Time, 928 IncrementalHoareTripleChecker+Valid, 5624 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14523.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:38:58,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3599 Valid, 2878 Invalid, 6556 Unknown, 0 Unchecked, 31.55ms Time], IncrementalHoareTripleChecker [928 Valid, 5624 Invalid, 4 Unknown, 0 Unchecked, 14523.34ms Time] [2021-11-12 23:38:59,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11827 states. [2021-11-12 23:38:59,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11827 to 11759. [2021-11-12 23:38:59,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11759 states, 8755 states have (on average 1.5607081667618503) internal successors, (13664), 9226 states have internal predecessors, (13664), 2368 states have call successors, (2368), 535 states have call predecessors, (2368), 635 states have return successors, (2981), 2357 states have call predecessors, (2981), 2364 states have call successors, (2981) [2021-11-12 23:38:59,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11759 states to 11759 states and 19013 transitions. [2021-11-12 23:38:59,878 INFO L78 Accepts]: Start accepts. Automaton has 11759 states and 19013 transitions. Word has length 173 [2021-11-12 23:38:59,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:38:59,879 INFO L470 AbstractCegarLoop]: Abstraction has 11759 states and 19013 transitions. [2021-11-12 23:38:59,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 7 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) [2021-11-12 23:38:59,879 INFO L276 IsEmpty]: Start isEmpty. Operand 11759 states and 19013 transitions. [2021-11-12 23:38:59,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-12 23:38:59,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:38:59,882 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] [2021-11-12 23:38:59,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:00,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:00,083 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:00,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:00,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1651518826, now seen corresponding path program 1 times [2021-11-12 23:39:00,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:00,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714727596] [2021-11-12 23:39:00,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:00,084 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:00,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:00,086 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:00,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-12 23:39:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:00,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 1102 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:39:00,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:00,873 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:39:00,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-12 23:39:01,326 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:01,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714727596] [2021-11-12 23:39:01,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714727596] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:01,326 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:01,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:39:01,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657687842] [2021-11-12 23:39:01,327 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:01,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:39:01,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:01,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:39:01,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:39:01,384 INFO L87 Difference]: Start difference. First operand 11759 states and 19013 transitions. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-12 23:39:02,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:02,314 INFO L93 Difference]: Finished difference Result 23265 states and 37913 transitions. [2021-11-12 23:39:02,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:39:02,314 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 180 [2021-11-12 23:39:02,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:02,391 INFO L225 Difference]: With dead ends: 23265 [2021-11-12 23:39:02,391 INFO L226 Difference]: Without dead ends: 11759 [2021-11-12 23:39:02,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:39:02,436 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 604 mSDsluCounter, 2897 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 3781 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.24ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.65ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:02,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [604 Valid, 3781 Invalid, 128 Unknown, 0 Unchecked, 4.24ms Time], IncrementalHoareTripleChecker [58 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 101.65ms Time] [2021-11-12 23:39:02,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11759 states. [2021-11-12 23:39:03,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11759 to 11759. [2021-11-12 23:39:03,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11759 states, 8755 states have (on average 1.546544831524843) internal successors, (13540), 9226 states have internal predecessors, (13540), 2368 states have call successors, (2368), 535 states have call predecessors, (2368), 635 states have return successors, (2981), 2357 states have call predecessors, (2981), 2364 states have call successors, (2981) [2021-11-12 23:39:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11759 states to 11759 states and 18889 transitions. [2021-11-12 23:39:03,495 INFO L78 Accepts]: Start accepts. Automaton has 11759 states and 18889 transitions. Word has length 180 [2021-11-12 23:39:03,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:03,495 INFO L470 AbstractCegarLoop]: Abstraction has 11759 states and 18889 transitions. [2021-11-12 23:39:03,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-12 23:39:03,496 INFO L276 IsEmpty]: Start isEmpty. Operand 11759 states and 18889 transitions. [2021-11-12 23:39:03,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-12 23:39:03,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:03,500 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] [2021-11-12 23:39:03,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:03,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:03,702 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:03,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:03,702 INFO L85 PathProgramCache]: Analyzing trace with hash -429316175, now seen corresponding path program 1 times [2021-11-12 23:39:03,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:03,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623306826] [2021-11-12 23:39:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:03,704 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:03,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:03,704 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:03,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-12 23:39:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:04,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:39:04,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:04,694 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:39:04,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 23:39:05,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:05,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623306826] [2021-11-12 23:39:05,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623306826] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:05,404 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:05,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-12 23:39:05,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036444189] [2021-11-12 23:39:05,405 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:05,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:39:05,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:05,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:39:05,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:39:05,406 INFO L87 Difference]: Start difference. First operand 11759 states and 18889 transitions. Second operand has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-12 23:39:07,443 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:09,448 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:14,677 INFO L93 Difference]: Finished difference Result 23494 states and 37913 transitions. [2021-11-12 23:39:14,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:39:14,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) Word has length 185 [2021-11-12 23:39:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:14,757 INFO L225 Difference]: With dead ends: 23494 [2021-11-12 23:39:14,757 INFO L226 Difference]: Without dead ends: 12821 [2021-11-12 23:39:14,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:39:14,794 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 3961 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 3135 mSolverCounterSat, 1077 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7620.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4040 SdHoareTripleChecker+Valid, 2137 SdHoareTripleChecker+Invalid, 4214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.88ms SdHoareTripleChecker+Time, 1077 IncrementalHoareTripleChecker+Valid, 3135 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8216.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:14,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4040 Valid, 2137 Invalid, 4214 Unknown, 0 Unchecked, 26.88ms Time], IncrementalHoareTripleChecker [1077 Valid, 3135 Invalid, 2 Unknown, 0 Unchecked, 8216.14ms Time] [2021-11-12 23:39:14,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12821 states. [2021-11-12 23:39:15,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12821 to 12123. [2021-11-12 23:39:15,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12123 states, 9027 states have (on average 1.53938185443669) internal successors, (13896), 9518 states have internal predecessors, (13896), 2406 states have call successors, (2406), 571 states have call predecessors, (2406), 689 states have return successors, (3067), 2393 states have call predecessors, (3067), 2402 states have call successors, (3067) [2021-11-12 23:39:15,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12123 states to 12123 states and 19369 transitions. [2021-11-12 23:39:15,686 INFO L78 Accepts]: Start accepts. Automaton has 12123 states and 19369 transitions. Word has length 185 [2021-11-12 23:39:15,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:15,687 INFO L470 AbstractCegarLoop]: Abstraction has 12123 states and 19369 transitions. [2021-11-12 23:39:15,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-12 23:39:15,687 INFO L276 IsEmpty]: Start isEmpty. Operand 12123 states and 19369 transitions. [2021-11-12 23:39:15,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-12 23:39:15,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:15,693 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, 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] [2021-11-12 23:39:15,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-11-12 23:39:15,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:15,912 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:15,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:15,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1129128741, now seen corresponding path program 1 times [2021-11-12 23:39:15,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:15,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386729416] [2021-11-12 23:39:15,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:15,914 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:15,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:15,915 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:15,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-12 23:39:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:16,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:39:16,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-12 23:39:17,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-12 23:39:18,161 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:18,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386729416] [2021-11-12 23:39:18,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386729416] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:18,161 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:18,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:39:18,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170788854] [2021-11-12 23:39:18,161 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:18,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:39:18,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:18,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:39:18,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:39:18,162 INFO L87 Difference]: Start difference. First operand 12123 states and 19369 transitions. Second operand has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 11 states have internal predecessors, (187), 7 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (32), 9 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-12 23:39:20,187 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:22,194 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:32,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:32,741 INFO L93 Difference]: Finished difference Result 32462 states and 52373 transitions. [2021-11-12 23:39:32,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-12 23:39:32,742 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 11 states have internal predecessors, (187), 7 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (32), 9 states have call predecessors, (32), 6 states have call successors, (32) Word has length 190 [2021-11-12 23:39:32,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:32,874 INFO L225 Difference]: With dead ends: 32462 [2021-11-12 23:39:32,874 INFO L226 Difference]: Without dead ends: 21422 [2021-11-12 23:39:32,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-12 23:39:32,922 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 3704 mSDsluCounter, 2519 mSDsCounter, 0 mSdLazyCounter, 6667 mSolverCounterSat, 1033 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11404.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3778 SdHoareTripleChecker+Valid, 3379 SdHoareTripleChecker+Invalid, 7702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 46.77ms SdHoareTripleChecker+Time, 1033 IncrementalHoareTripleChecker+Valid, 6667 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12571.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:32,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3778 Valid, 3379 Invalid, 7702 Unknown, 0 Unchecked, 46.77ms Time], IncrementalHoareTripleChecker [1033 Valid, 6667 Invalid, 2 Unknown, 0 Unchecked, 12571.27ms Time] [2021-11-12 23:39:32,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21422 states. [2021-11-12 23:39:34,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21422 to 21342. [2021-11-12 23:39:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21342 states, 15852 states have (on average 1.545987887963664) internal successors, (24507), 16693 states have internal predecessors, (24507), 4326 states have call successors, (4326), 1032 states have call predecessors, (4326), 1163 states have return successors, (5418), 4296 states have call predecessors, (5418), 4322 states have call successors, (5418) [2021-11-12 23:39:34,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21342 states to 21342 states and 34251 transitions. [2021-11-12 23:39:34,986 INFO L78 Accepts]: Start accepts. Automaton has 21342 states and 34251 transitions. Word has length 190 [2021-11-12 23:39:34,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:34,987 INFO L470 AbstractCegarLoop]: Abstraction has 21342 states and 34251 transitions. [2021-11-12 23:39:34,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 11 states have internal predecessors, (187), 7 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (32), 9 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-12 23:39:34,987 INFO L276 IsEmpty]: Start isEmpty. Operand 21342 states and 34251 transitions. [2021-11-12 23:39:34,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-12 23:39:34,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:34,992 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, 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] [2021-11-12 23:39:35,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:35,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:35,193 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:35,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:35,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1779635161, now seen corresponding path program 1 times [2021-11-12 23:39:35,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:35,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415209975] [2021-11-12 23:39:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:35,194 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:35,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:35,195 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:35,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-12 23:39:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:35,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 23:39:35,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:39:36,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:39:37,289 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:37,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415209975] [2021-11-12 23:39:37,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415209975] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:37,289 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:37,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-11-12 23:39:37,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359245646] [2021-11-12 23:39:37,289 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:37,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-12 23:39:37,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:37,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-12 23:39:37,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:39:37,291 INFO L87 Difference]: Start difference. First operand 21342 states and 34251 transitions. Second operand has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 13 states have internal predecessors, (193), 7 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (33), 11 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-12 23:39:39,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:41,319 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:43,326 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:45,331 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:58,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:58,411 INFO L93 Difference]: Finished difference Result 56448 states and 93028 transitions. [2021-11-12 23:39:58,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-12 23:39:58,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 13 states have internal predecessors, (193), 7 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (33), 11 states have call predecessors, (33), 6 states have call successors, (33) Word has length 190 [2021-11-12 23:39:58,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:58,690 INFO L225 Difference]: With dead ends: 56448 [2021-11-12 23:39:58,690 INFO L226 Difference]: Without dead ends: 33612 [2021-11-12 23:39:58,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-11-12 23:39:58,825 INFO L933 BasicCegarLoop]: 1044 mSDtfsCounter, 3589 mSDsluCounter, 3323 mSDsCounter, 0 mSdLazyCounter, 8308 mSolverCounterSat, 1020 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16941.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3689 SdHoareTripleChecker+Valid, 4367 SdHoareTripleChecker+Invalid, 9332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.94ms SdHoareTripleChecker+Time, 1020 IncrementalHoareTripleChecker+Valid, 8308 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18372.48ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:58,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3689 Valid, 4367 Invalid, 9332 Unknown, 0 Unchecked, 48.94ms Time], IncrementalHoareTripleChecker [1020 Valid, 8308 Invalid, 4 Unknown, 0 Unchecked, 18372.48ms Time] [2021-11-12 23:39:58,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33612 states. [2021-11-12 23:40:01,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33612 to 31968. [2021-11-12 23:40:01,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31968 states, 23732 states have (on average 1.5381341648407214) internal successors, (36503), 25046 states have internal predecessors, (36503), 6470 states have call successors, (6470), 1583 states have call predecessors, (6470), 1765 states have return successors, (8270), 6338 states have call predecessors, (8270), 6466 states have call successors, (8270) [2021-11-12 23:40:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31968 states to 31968 states and 51243 transitions. [2021-11-12 23:40:01,522 INFO L78 Accepts]: Start accepts. Automaton has 31968 states and 51243 transitions. Word has length 190 [2021-11-12 23:40:01,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:01,522 INFO L470 AbstractCegarLoop]: Abstraction has 31968 states and 51243 transitions. [2021-11-12 23:40:01,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 13 states have internal predecessors, (193), 7 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (33), 11 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-12 23:40:01,522 INFO L276 IsEmpty]: Start isEmpty. Operand 31968 states and 51243 transitions. [2021-11-12 23:40:01,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-12 23:40:01,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:01,526 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, 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] [2021-11-12 23:40:01,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (49)] Ended with exit code 0 [2021-11-12 23:40:01,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:01,727 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:01,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:01,727 INFO L85 PathProgramCache]: Analyzing trace with hash 902028657, now seen corresponding path program 1 times [2021-11-12 23:40:01,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:01,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [702206228] [2021-11-12 23:40:01,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:01,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:01,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:01,729 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:01,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-12 23:40:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:02,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:40:02,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:40:02,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:40:03,561 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:03,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [702206228] [2021-11-12 23:40:03,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [702206228] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:03,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [261475770] [2021-11-12 23:40:03,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:03,562 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:03,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:40:03,563 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:40:03,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-11-12 23:40:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:03,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:40:03,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:40:04,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:40:04,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [261475770] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:04,809 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:40:04,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 23:40:04,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965154134] [2021-11-12 23:40:04,809 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:04,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:40:04,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:04,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:40:04,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:40:04,811 INFO L87 Difference]: Start difference. First operand 31968 states and 51243 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-12 23:40:09,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:09,049 INFO L93 Difference]: Finished difference Result 95284 states and 154037 transitions. [2021-11-12 23:40:09,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:40:09,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 191 [2021-11-12 23:40:09,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:09,684 INFO L225 Difference]: With dead ends: 95284 [2021-11-12 23:40:09,685 INFO L226 Difference]: Without dead ends: 63395 [2021-11-12 23:40:09,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 753 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:40:09,941 INFO L933 BasicCegarLoop]: 1452 mSDtfsCounter, 783 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 2254 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.33ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.45ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:09,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 2254 Invalid, 10 Unknown, 0 Unchecked, 3.33ms Time], IncrementalHoareTripleChecker [5 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 33.45ms Time] [2021-11-12 23:40:09,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63395 states. [2021-11-12 23:40:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63395 to 62697. [2021-11-12 23:40:14,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62697 states, 46564 states have (on average 1.5335667038914182) internal successors, (71409), 49140 states have internal predecessors, (71409), 12632 states have call successors, (12632), 3134 states have call predecessors, (12632), 3500 states have return successors, (16862), 12422 states have call predecessors, (16862), 12628 states have call successors, (16862) [2021-11-12 23:40:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62697 states to 62697 states and 100903 transitions. [2021-11-12 23:40:15,157 INFO L78 Accepts]: Start accepts. Automaton has 62697 states and 100903 transitions. Word has length 191 [2021-11-12 23:40:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:15,158 INFO L470 AbstractCegarLoop]: Abstraction has 62697 states and 100903 transitions. [2021-11-12 23:40:15,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-12 23:40:15,158 INFO L276 IsEmpty]: Start isEmpty. Operand 62697 states and 100903 transitions. [2021-11-12 23:40:15,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-12 23:40:15,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:15,176 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, 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] [2021-11-12 23:40:15,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:15,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:15,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:15,581 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:15,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:15,582 INFO L85 PathProgramCache]: Analyzing trace with hash -2102022764, now seen corresponding path program 1 times [2021-11-12 23:40:15,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:15,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341069727] [2021-11-12 23:40:15,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:15,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:15,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:15,587 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:15,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-12 23:40:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:16,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:40:16,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:40:16,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:40:17,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:17,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341069727] [2021-11-12 23:40:17,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341069727] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:17,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [661522794] [2021-11-12 23:40:17,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:17,318 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:40:17,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:40:17,318 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:40:17,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-11-12 23:40:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:17,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 23:40:17,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:40:18,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:40:18,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [661522794] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:18,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843030444] [2021-11-12 23:40:18,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:18,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:40:18,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:40:18,811 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:40:18,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-12 23:40:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:19,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:40:19,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:40:19,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-12 23:40:20,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843030444] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:40:20,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:40:20,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 4, 5, 5] total 9 [2021-11-12 23:40:20,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11803675] [2021-11-12 23:40:20,366 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:40:20,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:40:20,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:20,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:40:20,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:40:20,368 INFO L87 Difference]: Start difference. First operand 62697 states and 100903 transitions. Second operand has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-12 23:40:22,387 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:24,393 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:26,398 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:34,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:34,297 INFO L93 Difference]: Finished difference Result 95906 states and 154242 transitions. [2021-11-12 23:40:34,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:40:34,298 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) Word has length 192 [2021-11-12 23:40:34,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:34,845 INFO L225 Difference]: With dead ends: 95906 [2021-11-12 23:40:34,845 INFO L226 Difference]: Without dead ends: 65169 [2021-11-12 23:40:34,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1149 GetRequests, 1140 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:40:34,956 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 2309 mSDsluCounter, 1252 mSDsCounter, 0 mSdLazyCounter, 3150 mSolverCounterSat, 592 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9108.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2383 SdHoareTripleChecker+Valid, 2194 SdHoareTripleChecker+Invalid, 3745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.60ms SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 3150 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9632.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:34,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2383 Valid, 2194 Invalid, 3745 Unknown, 0 Unchecked, 22.60ms Time], IncrementalHoareTripleChecker [592 Valid, 3150 Invalid, 3 Unknown, 0 Unchecked, 9632.79ms Time] [2021-11-12 23:40:35,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65169 states. [2021-11-12 23:40:39,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65169 to 63373. [2021-11-12 23:40:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63373 states, 47036 states have (on average 1.5276809252487455) internal successors, (71856), 49776 states have internal predecessors, (71856), 12680 states have call successors, (12680), 3142 states have call predecessors, (12680), 3656 states have return successors, (16818), 12454 states have call predecessors, (16818), 12676 states have call successors, (16818) [2021-11-12 23:40:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63373 states to 63373 states and 101354 transitions. [2021-11-12 23:40:40,085 INFO L78 Accepts]: Start accepts. Automaton has 63373 states and 101354 transitions. Word has length 192 [2021-11-12 23:40:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:40,086 INFO L470 AbstractCegarLoop]: Abstraction has 63373 states and 101354 transitions. [2021-11-12 23:40:40,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-12 23:40:40,086 INFO L276 IsEmpty]: Start isEmpty. Operand 63373 states and 101354 transitions. [2021-11-12 23:40:40,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-12 23:40:40,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:40,090 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, 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] [2021-11-12 23:40:40,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2021-11-12 23:40:40,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:40,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-11-12 23:40:40,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:40:40,691 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:40,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:40,692 INFO L85 PathProgramCache]: Analyzing trace with hash 651211552, now seen corresponding path program 1 times [2021-11-12 23:40:40,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:40,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123938119] [2021-11-12 23:40:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:40,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:40,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:40,694 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:40,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07c22278-bb0f-4baf-b617-e9bbd2f3102f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-12 23:40:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:41,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:40:41,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 23:40:41,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:40:42,018 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:42,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123938119] [2021-11-12 23:40:42,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123938119] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:42,019 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:42,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-12 23:40:42,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561143105] [2021-11-12 23:40:42,019 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:42,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:40:42,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:42,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:40:42,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:40:42,020 INFO L87 Difference]: Start difference. First operand 63373 states and 101354 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-12 23:40:44,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:46,044 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []