./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3c1ff6fd56cd2377d464f2b10cb9a0da8b8728fdfad0102577329687d925f1d9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:46:12,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:46:12,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:46:12,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:46:12,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:46:12,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:46:12,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:46:12,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:46:12,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:46:12,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:46:12,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:46:12,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:46:12,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:46:12,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:46:12,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:46:12,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:46:12,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:46:12,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:46:12,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:46:12,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:46:12,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:46:12,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:46:12,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:46:12,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:46:13,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:46:13,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:46:13,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:46:13,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:46:13,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:46:13,012 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:46:13,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:46:13,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:46:13,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:46:13,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:46:13,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:46:13,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:46:13,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:46:13,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:46:13,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:46:13,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:46:13,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:46:13,023 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:46:13,071 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:46:13,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:46:13,074 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:46:13,074 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:46:13,074 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:46:13,075 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:46:13,075 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:46:13,075 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:46:13,081 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:46:13,082 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:46:13,083 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:46:13,083 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:46:13,083 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:46:13,084 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:46:13,084 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:46:13,084 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:46:13,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:46:13,085 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:46:13,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:46:13,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:46:13,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:46:13,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:46:13,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:46:13,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:46:13,087 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:46:13,087 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:46:13,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:46:13,087 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:46:13,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:46:13,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:46:13,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:46:13,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:46:13,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:46:13,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:46:13,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:46:13,091 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:46:13,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:46:13,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:46:13,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:46:13,092 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:46:13,092 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_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c1ff6fd56cd2377d464f2b10cb9a0da8b8728fdfad0102577329687d925f1d9 [2021-11-19 14:46:13,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:46:13,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:46:13,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:46:13,422 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:46:13,423 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:46:13,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c [2021-11-19 14:46:13,518 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/data/7452d81a6/b890bf123070444f8d2d15f824047094/FLAGabbbcd830 [2021-11-19 14:46:14,257 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:46:14,258 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c [2021-11-19 14:46:14,280 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/data/7452d81a6/b890bf123070444f8d2d15f824047094/FLAGabbbcd830 [2021-11-19 14:46:14,418 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/data/7452d81a6/b890bf123070444f8d2d15f824047094 [2021-11-19 14:46:14,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:46:14,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:46:14,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:46:14,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:46:14,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:46:14,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:46:14" (1/1) ... [2021-11-19 14:46:14,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c19654e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:14, skipping insertion in model container [2021-11-19 14:46:14,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:46:14" (1/1) ... [2021-11-19 14:46:14,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:46:14,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:46:14,974 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c[35995,36008] [2021-11-19 14:46:15,129 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:46:15,139 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:46:15,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1be937fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:15, skipping insertion in model container [2021-11-19 14:46:15,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:46:15,142 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:46:15,146 INFO L158 Benchmark]: Toolchain (without parser) took 719.28ms. Allocated memory is still 100.7MB. Free memory was 57.3MB in the beginning and 60.5MB in the end (delta: -3.2MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. [2021-11-19 14:46:15,148 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 100.7MB. Free memory was 76.3MB in the beginning and 76.2MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:46:15,150 INFO L158 Benchmark]: CACSL2BoogieTranslator took 712.38ms. Allocated memory is still 100.7MB. Free memory was 57.1MB in the beginning and 60.5MB in the end (delta: -3.5MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. [2021-11-19 14:46:15,152 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 100.7MB. Free memory was 76.3MB in the beginning and 76.2MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 712.38ms. Allocated memory is still 100.7MB. Free memory was 57.1MB in the beginning and 60.5MB in the end (delta: -3.5MB). Peak memory consumption was 4.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 970]: 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_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3c1ff6fd56cd2377d464f2b10cb9a0da8b8728fdfad0102577329687d925f1d9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:46:17,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:46:17,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:46:17,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:46:17,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:46:17,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:46:17,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:46:17,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:46:17,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:46:17,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:46:17,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:46:17,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:46:17,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:46:17,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:46:17,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:46:17,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:46:17,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:46:17,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:46:17,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:46:17,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:46:17,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:46:17,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:46:17,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:46:17,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:46:17,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:46:17,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:46:17,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:46:17,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:46:17,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:46:17,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:46:17,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:46:17,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:46:17,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:46:17,492 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:46:17,493 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:46:17,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:46:17,494 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:46:17,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:46:17,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:46:17,509 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:46:17,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:46:17,510 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:46:17,554 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:46:17,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:46:17,555 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:46:17,555 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:46:17,556 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:46:17,556 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:46:17,556 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:46:17,557 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:46:17,557 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:46:17,557 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:46:17,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:46:17,559 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:46:17,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:46:17,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:46:17,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:46:17,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:46:17,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:46:17,561 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:46:17,561 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:46:17,561 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:46:17,562 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:46:17,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:46:17,562 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:46:17,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:46:17,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:46:17,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:46:17,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:46:17,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:46:17,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:46:17,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:46:17,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:46:17,564 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:46:17,565 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:46:17,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:46:17,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:46:17,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:46:17,566 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_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c1ff6fd56cd2377d464f2b10cb9a0da8b8728fdfad0102577329687d925f1d9 [2021-11-19 14:46:17,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:46:17,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:46:17,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:46:17,944 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:46:17,945 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:46:17,946 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c [2021-11-19 14:46:18,040 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/data/9ba711e6a/11f54955d65d40cf8f924bcc93155f18/FLAG3f0bdf60d [2021-11-19 14:46:18,767 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:46:18,768 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c [2021-11-19 14:46:18,802 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/data/9ba711e6a/11f54955d65d40cf8f924bcc93155f18/FLAG3f0bdf60d [2021-11-19 14:46:18,912 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/data/9ba711e6a/11f54955d65d40cf8f924bcc93155f18 [2021-11-19 14:46:18,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:46:18,918 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:46:18,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:46:18,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:46:18,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:46:18,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:46:18" (1/1) ... [2021-11-19 14:46:18,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@163681e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:18, skipping insertion in model container [2021-11-19 14:46:18,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:46:18" (1/1) ... [2021-11-19 14:46:18,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:46:19,041 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:46:19,553 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c[35995,36008] [2021-11-19 14:46:19,751 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:46:19,765 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:46:19,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:46:19,833 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c[35995,36008] [2021-11-19 14:46:19,883 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:46:19,889 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:46:19,949 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/sv-benchmarks/c/product-lines/elevator_spec2_product23.cil.c[35995,36008] [2021-11-19 14:46:20,017 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:46:20,054 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:46:20,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:20 WrapperNode [2021-11-19 14:46:20,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:46:20,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:46:20,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:46:20,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:46:20,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:20" (1/1) ... [2021-11-19 14:46:20,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:20" (1/1) ... [2021-11-19 14:46:20,156 INFO L137 Inliner]: procedures = 98, calls = 347, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 866 [2021-11-19 14:46:20,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:46:20,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:46:20,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:46:20,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:46:20,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:20" (1/1) ... [2021-11-19 14:46:20,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:20" (1/1) ... [2021-11-19 14:46:20,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:20" (1/1) ... [2021-11-19 14:46:20,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:20" (1/1) ... [2021-11-19 14:46:20,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:20" (1/1) ... [2021-11-19 14:46:20,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:20" (1/1) ... [2021-11-19 14:46:20,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:20" (1/1) ... [2021-11-19 14:46:20,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:46:20,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:46:20,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:46:20,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:46:20,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:20" (1/1) ... [2021-11-19 14:46:20,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:46:20,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:46:20,301 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:46:20,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:46:20,352 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 14:46:20,353 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 14:46:20,353 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:46:20,353 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:46:20,354 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:46:20,354 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:46:20,354 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:46:20,354 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:46:20,354 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:46:20,355 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:46:20,355 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:46:20,355 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:46:20,355 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 14:46:20,355 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 14:46:20,355 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 14:46:20,356 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 14:46:20,356 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:46:20,356 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:46:20,356 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:46:20,356 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:46:20,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:46:20,357 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 14:46:20,357 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-19 14:46:20,357 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-19 14:46:20,357 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-19 14:46:20,358 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 14:46:20,358 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 14:46:20,358 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:46:20,358 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:46:20,358 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:46:20,359 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:46:20,359 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 14:46:20,361 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 14:46:20,361 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:46:20,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:46:20,361 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:46:20,362 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:46:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:46:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:46:20,362 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:46:20,362 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:46:20,362 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:46:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:46:20,363 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:46:20,363 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:46:20,363 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:46:20,364 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:46:20,364 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:46:20,365 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:46:20,365 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:46:20,366 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-19 14:46:20,367 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-19 14:46:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:46:20,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:46:20,367 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:46:20,368 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:46:20,632 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:46:20,634 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:46:22,114 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:46:22,127 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:46:22,128 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:46:22,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:46:22 BoogieIcfgContainer [2021-11-19 14:46:22,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:46:22,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:46:22,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:46:22,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:46:22,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:46:18" (1/3) ... [2021-11-19 14:46:22,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d82107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:46:22, skipping insertion in model container [2021-11-19 14:46:22,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:46:20" (2/3) ... [2021-11-19 14:46:22,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66d82107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:46:22, skipping insertion in model container [2021-11-19 14:46:22,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:46:22" (3/3) ... [2021-11-19 14:46:22,143 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product23.cil.c [2021-11-19 14:46:22,149 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:46:22,149 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:46:22,202 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:46:22,209 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:46:22,209 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:46:22,244 INFO L276 IsEmpty]: Start isEmpty. Operand has 587 states, 457 states have (on average 1.6783369803063457) internal successors, (767), 478 states have internal predecessors, (767), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) [2021-11-19 14:46:22,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-19 14:46:22,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:22,278 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:22,279 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:22,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:22,285 INFO L85 PathProgramCache]: Analyzing trace with hash -586530928, now seen corresponding path program 1 times [2021-11-19 14:46:22,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:22,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362545108] [2021-11-19 14:46:22,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:22,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:22,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:22,304 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:22,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:46:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:22,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 14:46:22,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:46:23,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:46:23,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:23,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362545108] [2021-11-19 14:46:23,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362545108] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:23,498 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:23,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 14:46:23,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78916068] [2021-11-19 14:46:23,501 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:23,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 14:46:23,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:23,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 14:46:23,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:46:23,567 INFO L87 Difference]: Start difference. First operand has 587 states, 457 states have (on average 1.6783369803063457) internal successors, (767), 478 states have internal predecessors, (767), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:46:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:23,683 INFO L93 Difference]: Finished difference Result 608 states and 1001 transitions. [2021-11-19 14:46:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 14:46:23,686 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) Word has length 104 [2021-11-19 14:46:23,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:23,710 INFO L225 Difference]: With dead ends: 608 [2021-11-19 14:46:23,710 INFO L226 Difference]: Without dead ends: 579 [2021-11-19 14:46:23,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 14:46:23,719 INFO L933 BasicCegarLoop]: 962 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:23,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:46:23,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-19 14:46:23,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 579. [2021-11-19 14:46:23,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 451 states have (on average 1.6762749445676275) internal successors, (756), 470 states have internal predecessors, (756), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:46:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 955 transitions. [2021-11-19 14:46:23,822 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 955 transitions. Word has length 104 [2021-11-19 14:46:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:23,825 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 955 transitions. [2021-11-19 14:46:23,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 states have internal predecessors, (65), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-19 14:46:23,826 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 955 transitions. [2021-11-19 14:46:23,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 14:46:23,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:23,839 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:23,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:24,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:24,059 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:24,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:24,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1097067716, now seen corresponding path program 1 times [2021-11-19 14:46:24,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:24,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257133356] [2021-11-19 14:46:24,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:24,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:24,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:24,088 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:24,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:46:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:24,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:46:24,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:46:24,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:46:25,079 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:25,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257133356] [2021-11-19 14:46:25,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257133356] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:25,080 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:25,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:46:25,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133158300] [2021-11-19 14:46:25,081 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:25,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:46:25,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:25,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:46:25,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:46:25,084 INFO L87 Difference]: Start difference. First operand 579 states and 955 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-19 14:46:25,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:25,216 INFO L93 Difference]: Finished difference Result 1142 states and 1888 transitions. [2021-11-19 14:46:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:46:25,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 106 [2021-11-19 14:46:25,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:25,225 INFO L225 Difference]: With dead ends: 1142 [2021-11-19 14:46:25,226 INFO L226 Difference]: Without dead ends: 579 [2021-11-19 14:46:25,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:46:25,238 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 25 mSDsluCounter, 2819 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3761 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:25,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 3761 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:46:25,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-19 14:46:25,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 579. [2021-11-19 14:46:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 451 states have (on average 1.6629711751662972) internal successors, (750), 470 states have internal predecessors, (750), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:46:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 949 transitions. [2021-11-19 14:46:25,284 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 949 transitions. Word has length 106 [2021-11-19 14:46:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:25,285 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 949 transitions. [2021-11-19 14:46:25,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-19 14:46:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 949 transitions. [2021-11-19 14:46:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 14:46:25,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:25,304 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:25,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:25,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:25,526 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:25,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:25,527 INFO L85 PathProgramCache]: Analyzing trace with hash -25175193, now seen corresponding path program 1 times [2021-11-19 14:46:25,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:25,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345782753] [2021-11-19 14:46:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:25,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:25,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:25,530 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:25,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:46:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:25,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:46:25,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:46:26,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:46:26,573 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:26,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345782753] [2021-11-19 14:46:26,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345782753] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:26,574 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:26,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:46:26,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776471357] [2021-11-19 14:46:26,574 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:26,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:46:26,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:26,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:46:26,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:46:26,577 INFO L87 Difference]: Start difference. First operand 579 states and 949 transitions. Second operand has 11 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:46:26,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:26,770 INFO L93 Difference]: Finished difference Result 1100 states and 1805 transitions. [2021-11-19 14:46:26,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:46:26,772 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 111 [2021-11-19 14:46:26,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:26,780 INFO L225 Difference]: With dead ends: 1100 [2021-11-19 14:46:26,780 INFO L226 Difference]: Without dead ends: 573 [2021-11-19 14:46:26,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:46:26,786 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 193 mSDsluCounter, 5521 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 6457 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:26,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 6457 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:46:26,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-19 14:46:26,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 573. [2021-11-19 14:46:26,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 445 states have (on average 1.6561797752808989) internal successors, (737), 464 states have internal predecessors, (737), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:46:26,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 936 transitions. [2021-11-19 14:46:26,825 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 936 transitions. Word has length 111 [2021-11-19 14:46:26,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:26,825 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 936 transitions. [2021-11-19 14:46:26,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:46:26,826 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 936 transitions. [2021-11-19 14:46:26,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 14:46:26,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:26,832 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:26,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:27,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:27,045 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:27,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:27,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1953324253, now seen corresponding path program 1 times [2021-11-19 14:46:27,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:27,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586762342] [2021-11-19 14:46:27,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:27,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:27,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:27,049 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:27,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:46:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:27,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:46:27,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:46:27,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:46:28,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:28,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586762342] [2021-11-19 14:46:28,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586762342] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:28,005 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:28,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 14:46:28,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448358871] [2021-11-19 14:46:28,005 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:28,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:46:28,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:28,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:46:28,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:46:28,007 INFO L87 Difference]: Start difference. First operand 573 states and 936 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:46:28,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:28,214 INFO L93 Difference]: Finished difference Result 1103 states and 1806 transitions. [2021-11-19 14:46:28,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:46:28,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 112 [2021-11-19 14:46:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:28,221 INFO L225 Difference]: With dead ends: 1103 [2021-11-19 14:46:28,221 INFO L226 Difference]: Without dead ends: 573 [2021-11-19 14:46:28,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:46:28,227 INFO L933 BasicCegarLoop]: 887 mSDtfsCounter, 112 mSDsluCounter, 2633 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 3520 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:28,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 3520 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:46:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-19 14:46:28,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 573. [2021-11-19 14:46:28,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 445 states have (on average 1.602247191011236) internal successors, (713), 464 states have internal predecessors, (713), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:46:28,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 912 transitions. [2021-11-19 14:46:28,265 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 912 transitions. Word has length 112 [2021-11-19 14:46:28,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:28,266 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 912 transitions. [2021-11-19 14:46:28,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:46:28,266 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 912 transitions. [2021-11-19 14:46:28,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 14:46:28,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:28,272 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:28,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:28,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:28,495 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:28,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:28,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2078311102, now seen corresponding path program 1 times [2021-11-19 14:46:28,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:28,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62649219] [2021-11-19 14:46:28,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:28,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:28,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:28,498 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:28,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:46:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:28,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:46:28,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:46:29,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:46:29,523 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:29,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62649219] [2021-11-19 14:46:29,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62649219] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:29,524 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:29,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:46:29,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185078134] [2021-11-19 14:46:29,524 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:29,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:46:29,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:29,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:46:29,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:46:29,526 INFO L87 Difference]: Start difference. First operand 573 states and 912 transitions. Second operand has 8 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 14:46:29,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:29,664 INFO L93 Difference]: Finished difference Result 1094 states and 1768 transitions. [2021-11-19 14:46:29,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:46:29,666 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 114 [2021-11-19 14:46:29,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:29,672 INFO L225 Difference]: With dead ends: 1094 [2021-11-19 14:46:29,672 INFO L226 Difference]: Without dead ends: 552 [2021-11-19 14:46:29,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:46:29,678 INFO L933 BasicCegarLoop]: 900 mSDtfsCounter, 147 mSDsluCounter, 3575 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 4475 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:29,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 4475 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:46:29,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-19 14:46:29,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-11-19 14:46:29,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 424 states have (on average 1.6226415094339623) internal successors, (688), 443 states have internal predecessors, (688), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:46:29,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 887 transitions. [2021-11-19 14:46:29,715 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 887 transitions. Word has length 114 [2021-11-19 14:46:29,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:29,717 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 887 transitions. [2021-11-19 14:46:29,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 14:46:29,717 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 887 transitions. [2021-11-19 14:46:29,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 14:46:29,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:29,723 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:29,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:29,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:29,939 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:29,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:29,940 INFO L85 PathProgramCache]: Analyzing trace with hash -528624428, now seen corresponding path program 1 times [2021-11-19 14:46:29,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:29,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68546543] [2021-11-19 14:46:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:29,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:29,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:29,942 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:29,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:46:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:30,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:46:30,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:46:30,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:46:31,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:31,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68546543] [2021-11-19 14:46:31,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68546543] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:31,066 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:46:31,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:46:31,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039696789] [2021-11-19 14:46:31,066 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:31,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:46:31,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:31,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:46:31,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:46:31,068 INFO L87 Difference]: Start difference. First operand 552 states and 887 transitions. Second operand has 13 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:46:31,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:31,262 INFO L93 Difference]: Finished difference Result 1067 states and 1732 transitions. [2021-11-19 14:46:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:46:31,263 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 117 [2021-11-19 14:46:31,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:31,269 INFO L225 Difference]: With dead ends: 1067 [2021-11-19 14:46:31,269 INFO L226 Difference]: Without dead ends: 552 [2021-11-19 14:46:31,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:46:31,274 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 59 mSDsluCounter, 6083 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 6955 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:31,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 6955 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:46:31,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-19 14:46:31,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2021-11-19 14:46:31,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 424 states have (on average 1.6202830188679245) internal successors, (687), 443 states have internal predecessors, (687), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (97), 95 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 14:46:31,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 886 transitions. [2021-11-19 14:46:31,300 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 886 transitions. Word has length 117 [2021-11-19 14:46:31,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:31,301 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 886 transitions. [2021-11-19 14:46:31,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 4 states have call successors, (25), 2 states have call predecessors, (25), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:46:31,301 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 886 transitions. [2021-11-19 14:46:31,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 14:46:31,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:31,306 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:31,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:31,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:31,523 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:31,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:31,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2146297508, now seen corresponding path program 1 times [2021-11-19 14:46:31,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:31,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075139554] [2021-11-19 14:46:31,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:31,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:31,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:31,526 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:31,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:46:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:31,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:46:31,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:46:32,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:46:32,795 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:32,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075139554] [2021-11-19 14:46:32,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075139554] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:32,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:32,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:46:32,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719537815] [2021-11-19 14:46:32,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:32,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:46:32,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:32,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:46:32,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:46:32,797 INFO L87 Difference]: Start difference. First operand 552 states and 886 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:46:33,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:33,798 INFO L93 Difference]: Finished difference Result 1063 states and 1752 transitions. [2021-11-19 14:46:33,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:46:33,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 118 [2021-11-19 14:46:33,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:33,808 INFO L225 Difference]: With dead ends: 1063 [2021-11-19 14:46:33,808 INFO L226 Difference]: Without dead ends: 556 [2021-11-19 14:46:33,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:46:33,814 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 837 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 2199 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:33,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 2199 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:46:33,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-11-19 14:46:33,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 556. [2021-11-19 14:46:33,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 427 states have (on average 1.6159250585480094) internal successors, (690), 446 states have internal predecessors, (690), 102 states have call successors, (102), 27 states have call predecessors, (102), 26 states have return successors, (98), 95 states have call predecessors, (98), 97 states have call successors, (98) [2021-11-19 14:46:33,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 890 transitions. [2021-11-19 14:46:33,850 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 890 transitions. Word has length 118 [2021-11-19 14:46:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:33,850 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 890 transitions. [2021-11-19 14:46:33,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:46:33,851 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 890 transitions. [2021-11-19 14:46:33,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:46:33,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:33,856 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-19 14:46:33,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-19 14:46:34,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:34,072 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:34,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:34,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1366515930, now seen corresponding path program 1 times [2021-11-19 14:46:34,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:34,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765454901] [2021-11-19 14:46:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:34,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:34,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:34,076 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:34,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:46:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:34,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:46:34,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:46:34,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:46:35,312 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:35,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765454901] [2021-11-19 14:46:35,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765454901] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:35,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:35,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:46:35,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048441231] [2021-11-19 14:46:35,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:35,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:46:35,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:35,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:46:35,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:46:35,315 INFO L87 Difference]: Start difference. First operand 556 states and 890 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:46:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:36,183 INFO L93 Difference]: Finished difference Result 1072 states and 1759 transitions. [2021-11-19 14:46:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:46:36,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 120 [2021-11-19 14:46:36,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:36,190 INFO L225 Difference]: With dead ends: 1072 [2021-11-19 14:46:36,190 INFO L226 Difference]: Without dead ends: 561 [2021-11-19 14:46:36,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:46:36,197 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 825 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:36,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 2200 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:46:36,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-19 14:46:36,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-19 14:46:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 431 states have (on average 1.6102088167053363) internal successors, (694), 450 states have internal predecessors, (694), 102 states have call successors, (102), 28 states have call predecessors, (102), 27 states have return successors, (99), 95 states have call predecessors, (99), 97 states have call successors, (99) [2021-11-19 14:46:36,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 895 transitions. [2021-11-19 14:46:36,226 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 895 transitions. Word has length 120 [2021-11-19 14:46:36,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:36,227 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 895 transitions. [2021-11-19 14:46:36,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:46:36,227 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 895 transitions. [2021-11-19 14:46:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 14:46:36,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:36,233 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-19 14:46:36,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:36,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:36,451 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:36,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:36,451 INFO L85 PathProgramCache]: Analyzing trace with hash 50308444, now seen corresponding path program 1 times [2021-11-19 14:46:36,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:36,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821576605] [2021-11-19 14:46:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:36,452 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:36,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:36,453 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:36,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:46:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:36,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:46:36,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:46:37,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:46:37,715 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:37,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821576605] [2021-11-19 14:46:37,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821576605] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:37,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:37,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:46:37,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606286831] [2021-11-19 14:46:37,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:37,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:46:37,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:37,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:46:37,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:46:37,719 INFO L87 Difference]: Start difference. First operand 561 states and 895 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:46:38,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:38,567 INFO L93 Difference]: Finished difference Result 1083 states and 1768 transitions. [2021-11-19 14:46:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:46:38,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 122 [2021-11-19 14:46:38,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:38,573 INFO L225 Difference]: With dead ends: 1083 [2021-11-19 14:46:38,574 INFO L226 Difference]: Without dead ends: 567 [2021-11-19 14:46:38,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:46:38,579 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 835 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:38,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [852 Valid, 2200 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:46:38,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-19 14:46:38,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2021-11-19 14:46:38,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 436 states have (on average 1.603211009174312) internal successors, (699), 455 states have internal predecessors, (699), 102 states have call successors, (102), 29 states have call predecessors, (102), 28 states have return successors, (100), 95 states have call predecessors, (100), 97 states have call successors, (100) [2021-11-19 14:46:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 901 transitions. [2021-11-19 14:46:38,610 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 901 transitions. Word has length 122 [2021-11-19 14:46:38,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:38,610 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 901 transitions. [2021-11-19 14:46:38,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:46:38,611 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 901 transitions. [2021-11-19 14:46:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 14:46:38,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:38,616 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-19 14:46:38,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:38,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:38,833 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:38,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:38,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1457343278, now seen corresponding path program 1 times [2021-11-19 14:46:38,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:38,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519902014] [2021-11-19 14:46:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:38,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:38,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:38,835 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:38,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:46:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:39,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:46:39,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:39,497 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:46:39,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:46:40,041 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:40,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519902014] [2021-11-19 14:46:40,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519902014] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:46:40,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:46:40,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:46:40,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423823877] [2021-11-19 14:46:40,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:40,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:46:40,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:40,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:46:40,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:46:40,043 INFO L87 Difference]: Start difference. First operand 567 states and 901 transitions. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:46:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:40,931 INFO L93 Difference]: Finished difference Result 1096 states and 1779 transitions. [2021-11-19 14:46:40,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:46:40,932 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 124 [2021-11-19 14:46:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:40,937 INFO L225 Difference]: With dead ends: 1096 [2021-11-19 14:46:40,937 INFO L226 Difference]: Without dead ends: 574 [2021-11-19 14:46:40,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:46:40,943 INFO L933 BasicCegarLoop]: 857 mSDtfsCounter, 824 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 2200 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:40,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 2200 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:46:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-19 14:46:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2021-11-19 14:46:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 442 states have (on average 1.5950226244343892) internal successors, (705), 461 states have internal predecessors, (705), 102 states have call successors, (102), 30 states have call predecessors, (102), 29 states have return successors, (101), 95 states have call predecessors, (101), 97 states have call successors, (101) [2021-11-19 14:46:40,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 908 transitions. [2021-11-19 14:46:40,974 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 908 transitions. Word has length 124 [2021-11-19 14:46:40,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:40,974 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 908 transitions. [2021-11-19 14:46:40,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:46:40,975 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 908 transitions. [2021-11-19 14:46:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 14:46:40,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:40,980 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:41,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:41,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:41,211 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:41,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:41,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2074149028, now seen corresponding path program 1 times [2021-11-19 14:46:41,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:41,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310169181] [2021-11-19 14:46:41,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:41,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:41,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:41,214 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:41,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:46:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:41,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:46:41,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:46:42,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:46:43,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:43,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310169181] [2021-11-19 14:46:43,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310169181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:46:43,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [944136318] [2021-11-19 14:46:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:43,084 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:46:43,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:46:43,089 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:46:43,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-19 14:46:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:43,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:46:43,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-19 14:46:43,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:43,861 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:46:43,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [944136318] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:43,862 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:46:43,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11, 10] total 19 [2021-11-19 14:46:43,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951085930] [2021-11-19 14:46:43,862 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:43,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:46:43,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:43,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:46:43,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:46:43,864 INFO L87 Difference]: Start difference. First operand 574 states and 908 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:46:43,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:43,946 INFO L93 Difference]: Finished difference Result 1627 states and 2633 transitions. [2021-11-19 14:46:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:46:43,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 126 [2021-11-19 14:46:43,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:43,957 INFO L225 Difference]: With dead ends: 1627 [2021-11-19 14:46:43,957 INFO L226 Difference]: Without dead ends: 1098 [2021-11-19 14:46:43,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:46:43,961 INFO L933 BasicCegarLoop]: 1597 mSDtfsCounter, 830 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 2478 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:43,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [830 Valid, 2478 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:46:43,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-11-19 14:46:44,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 1078. [2021-11-19 14:46:44,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 833 states have (on average 1.617046818727491) internal successors, (1347), 865 states have internal predecessors, (1347), 190 states have call successors, (190), 54 states have call predecessors, (190), 54 states have return successors, (199), 184 states have call predecessors, (199), 185 states have call successors, (199) [2021-11-19 14:46:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 1736 transitions. [2021-11-19 14:46:44,017 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 1736 transitions. Word has length 126 [2021-11-19 14:46:44,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:44,018 INFO L470 AbstractCegarLoop]: Abstraction has 1078 states and 1736 transitions. [2021-11-19 14:46:44,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-19 14:46:44,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 1736 transitions. [2021-11-19 14:46:44,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 14:46:44,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:44,024 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:44,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-19 14:46:44,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:44,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:46:44,440 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:44,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:44,441 INFO L85 PathProgramCache]: Analyzing trace with hash -150920994, now seen corresponding path program 1 times [2021-11-19 14:46:44,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:44,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62765672] [2021-11-19 14:46:44,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:44,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:44,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:44,443 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:44,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:46:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:44,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:46:44,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:46:45,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:46,304 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:46:46,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:46,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62765672] [2021-11-19 14:46:46,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62765672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:46:46,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [135850943] [2021-11-19 14:46:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:46,305 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:46:46,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:46:46,307 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:46:46,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-19 14:46:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:46,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:46:46,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:46:47,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:46:47,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [135850943] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:47,572 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:46:47,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 14:46:47,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208445276] [2021-11-19 14:46:47,572 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:47,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:46:47,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:47,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:46:47,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:46:47,574 INFO L87 Difference]: Start difference. First operand 1078 states and 1736 transitions. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:46:50,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:50,081 INFO L93 Difference]: Finished difference Result 3416 states and 5629 transitions. [2021-11-19 14:46:50,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:46:50,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 126 [2021-11-19 14:46:50,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:50,100 INFO L225 Difference]: With dead ends: 3416 [2021-11-19 14:46:50,100 INFO L226 Difference]: Without dead ends: 2383 [2021-11-19 14:46:50,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:46:50,108 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 1941 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2025 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:50,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2025 Valid, 1599 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-19 14:46:50,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-11-19 14:46:50,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2315. [2021-11-19 14:46:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 1761 states have (on average 1.6246450880181715) internal successors, (2861), 1835 states have internal predecessors, (2861), 442 states have call successors, (442), 103 states have call predecessors, (442), 111 states have return successors, (515), 438 states have call predecessors, (515), 437 states have call successors, (515) [2021-11-19 14:46:50,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 3818 transitions. [2021-11-19 14:46:50,271 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 3818 transitions. Word has length 126 [2021-11-19 14:46:50,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:50,272 INFO L470 AbstractCegarLoop]: Abstraction has 2315 states and 3818 transitions. [2021-11-19 14:46:50,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:46:50,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 3818 transitions. [2021-11-19 14:46:50,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 14:46:50,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:50,278 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:50,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:50,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:50,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:46:50,695 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:50,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:50,696 INFO L85 PathProgramCache]: Analyzing trace with hash -383733082, now seen corresponding path program 1 times [2021-11-19 14:46:50,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:50,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687781563] [2021-11-19 14:46:50,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:50,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:50,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:50,698 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:50,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:46:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:50,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:46:50,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:51,506 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:46:51,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:46:52,332 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:52,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687781563] [2021-11-19 14:46:52,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687781563] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:46:52,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1843993873] [2021-11-19 14:46:52,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:52,333 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:46:52,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:46:52,333 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:46:52,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-19 14:46:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:52,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:46:52,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:46:52,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:46:53,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1843993873] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:53,317 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:46:53,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 14:46:53,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323014864] [2021-11-19 14:46:53,318 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:53,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:46:53,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:53,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:46:53,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:46:53,320 INFO L87 Difference]: Start difference. First operand 2315 states and 3818 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:46:55,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:46:55,818 INFO L93 Difference]: Finished difference Result 7635 states and 12950 transitions. [2021-11-19 14:46:55,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:46:55,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 127 [2021-11-19 14:46:55,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:46:55,868 INFO L225 Difference]: With dead ends: 7635 [2021-11-19 14:46:55,868 INFO L226 Difference]: Without dead ends: 5365 [2021-11-19 14:46:55,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:46:55,921 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 3227 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3310 SdHoareTripleChecker+Valid, 1280 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:46:55,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3310 Valid, 1280 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:46:55,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5365 states. [2021-11-19 14:46:56,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5365 to 5158. [2021-11-19 14:46:56,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5158 states, 3850 states have (on average 1.6236363636363635) internal successors, (6251), 4032 states have internal predecessors, (6251), 1072 states have call successors, (1072), 201 states have call predecessors, (1072), 235 states have return successors, (1415), 1076 states have call predecessors, (1415), 1067 states have call successors, (1415) [2021-11-19 14:46:56,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5158 states to 5158 states and 8738 transitions. [2021-11-19 14:46:56,276 INFO L78 Accepts]: Start accepts. Automaton has 5158 states and 8738 transitions. Word has length 127 [2021-11-19 14:46:56,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:46:56,276 INFO L470 AbstractCegarLoop]: Abstraction has 5158 states and 8738 transitions. [2021-11-19 14:46:56,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:46:56,295 INFO L276 IsEmpty]: Start isEmpty. Operand 5158 states and 8738 transitions. [2021-11-19 14:46:56,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-19 14:46:56,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:46:56,301 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:46:56,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:56,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:46:56,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:46:56,705 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:46:56,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:46:56,705 INFO L85 PathProgramCache]: Analyzing trace with hash 989030688, now seen corresponding path program 1 times [2021-11-19 14:46:56,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:46:56,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836754032] [2021-11-19 14:46:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:56,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:46:56,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:46:56,707 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:46:56,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:46:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:56,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:46:57,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:46:57,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:46:58,303 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:46:58,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836754032] [2021-11-19 14:46:58,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836754032] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:46:58,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [870845170] [2021-11-19 14:46:58,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:46:58,303 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:46:58,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:46:58,304 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:46:58,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-19 14:46:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:46:58,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:46:58,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:46:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:46:58,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:46:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:46:59,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [870845170] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:46:59,342 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:46:59,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 14:46:59,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713435307] [2021-11-19 14:46:59,343 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:46:59,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:46:59,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:46:59,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:46:59,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:46:59,345 INFO L87 Difference]: Start difference. First operand 5158 states and 8738 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:47:01,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:01,971 INFO L93 Difference]: Finished difference Result 17498 states and 30951 transitions. [2021-11-19 14:47:01,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:47:01,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 128 [2021-11-19 14:47:01,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:02,089 INFO L225 Difference]: With dead ends: 17498 [2021-11-19 14:47:02,090 INFO L226 Difference]: Without dead ends: 12385 [2021-11-19 14:47:02,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:47:02,134 INFO L933 BasicCegarLoop]: 899 mSDtfsCounter, 3194 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 822 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3276 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 822 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:02,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3276 Valid, 1285 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [822 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 14:47:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12385 states. [2021-11-19 14:47:02,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12385 to 11749. [2021-11-19 14:47:02,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11749 states, 8583 states have (on average 1.6165676336945125) internal successors, (13875), 9041 states have internal predecessors, (13875), 2660 states have call successors, (2660), 397 states have call predecessors, (2660), 505 states have return successors, (4046), 2692 states have call predecessors, (4046), 2655 states have call successors, (4046) [2021-11-19 14:47:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11749 states to 11749 states and 20581 transitions. [2021-11-19 14:47:03,087 INFO L78 Accepts]: Start accepts. Automaton has 11749 states and 20581 transitions. Word has length 128 [2021-11-19 14:47:03,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:03,088 INFO L470 AbstractCegarLoop]: Abstraction has 11749 states and 20581 transitions. [2021-11-19 14:47:03,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:47:03,089 INFO L276 IsEmpty]: Start isEmpty. Operand 11749 states and 20581 transitions. [2021-11-19 14:47:03,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 14:47:03,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:03,095 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:47:03,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:03,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:03,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:03,512 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:03,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:03,513 INFO L85 PathProgramCache]: Analyzing trace with hash 595038504, now seen corresponding path program 1 times [2021-11-19 14:47:03,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:03,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1066360309] [2021-11-19 14:47:03,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:03,513 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:03,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:03,514 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:03,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:47:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:03,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:47:03,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:47:04,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:47:05,078 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:05,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1066360309] [2021-11-19 14:47:05,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1066360309] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:05,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [315938607] [2021-11-19 14:47:05,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:05,079 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:05,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:47:05,080 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:47:05,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-19 14:47:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:05,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:47:05,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:47:05,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:47:06,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [315938607] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:47:06,136 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:47:06,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 14:47:06,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448425887] [2021-11-19 14:47:06,136 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:06,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:47:06,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:06,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:47:06,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:47:06,138 INFO L87 Difference]: Start difference. First operand 11749 states and 20581 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:47:09,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:09,139 INFO L93 Difference]: Finished difference Result 40543 states and 76124 transitions. [2021-11-19 14:47:09,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:47:09,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 129 [2021-11-19 14:47:09,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:09,407 INFO L225 Difference]: With dead ends: 40543 [2021-11-19 14:47:09,407 INFO L226 Difference]: Without dead ends: 28839 [2021-11-19 14:47:09,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:47:09,486 INFO L933 BasicCegarLoop]: 902 mSDtfsCounter, 2519 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 649 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2600 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 649 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:09,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2600 Valid, 1421 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [649 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-19 14:47:09,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28839 states. [2021-11-19 14:47:11,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28839 to 27356. [2021-11-19 14:47:11,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27356 states, 19528 states have (on average 1.605438344940598) internal successors, (31351), 20694 states have internal predecessors, (31351), 6728 states have call successors, (6728), 789 states have call predecessors, (6728), 1099 states have return successors, (12045), 6852 states have call predecessors, (12045), 6723 states have call successors, (12045) [2021-11-19 14:47:11,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27356 states to 27356 states and 50124 transitions. [2021-11-19 14:47:11,829 INFO L78 Accepts]: Start accepts. Automaton has 27356 states and 50124 transitions. Word has length 129 [2021-11-19 14:47:11,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:11,830 INFO L470 AbstractCegarLoop]: Abstraction has 27356 states and 50124 transitions. [2021-11-19 14:47:11,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:47:11,830 INFO L276 IsEmpty]: Start isEmpty. Operand 27356 states and 50124 transitions. [2021-11-19 14:47:11,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-19 14:47:11,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:11,837 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:47:11,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:12,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:12,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:12,254 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:12,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:12,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1266186594, now seen corresponding path program 1 times [2021-11-19 14:47:12,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:12,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879169781] [2021-11-19 14:47:12,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:12,255 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:12,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:12,258 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:12,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:47:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:12,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:47:12,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:47:13,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:47:13,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:13,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879169781] [2021-11-19 14:47:13,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879169781] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:47:13,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1650010398] [2021-11-19 14:47:13,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:13,885 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:13,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:47:13,892 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:47:13,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-19 14:47:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:14,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:47:14,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:14,490 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:47:14,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:47:15,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1650010398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:47:15,147 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:47:15,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 14:47:15,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933445916] [2021-11-19 14:47:15,147 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:15,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:47:15,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:15,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:47:15,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:47:15,149 INFO L87 Difference]: Start difference. First operand 27356 states and 50124 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:47:20,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:47:20,123 INFO L93 Difference]: Finished difference Result 95242 states and 195288 transitions. [2021-11-19 14:47:20,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:47:20,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 130 [2021-11-19 14:47:20,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:47:20,915 INFO L225 Difference]: With dead ends: 95242 [2021-11-19 14:47:20,915 INFO L226 Difference]: Without dead ends: 67921 [2021-11-19 14:47:21,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:47:21,150 INFO L933 BasicCegarLoop]: 987 mSDtfsCounter, 3134 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 817 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3214 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 817 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:47:21,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3214 Valid, 1366 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [817 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 14:47:21,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67921 states. [2021-11-19 14:47:25,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67921 to 65249. [2021-11-19 14:47:26,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65249 states, 45510 states have (on average 1.5916062403867282) internal successors, (72434), 48504 states have internal predecessors, (72434), 17312 states have call successors, (17312), 1571 states have call predecessors, (17312), 2426 states have return successors, (37435), 17727 states have call predecessors, (37435), 17307 states have call successors, (37435) [2021-11-19 14:47:27,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65249 states to 65249 states and 127181 transitions. [2021-11-19 14:47:27,186 INFO L78 Accepts]: Start accepts. Automaton has 65249 states and 127181 transitions. Word has length 130 [2021-11-19 14:47:27,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:47:27,187 INFO L470 AbstractCegarLoop]: Abstraction has 65249 states and 127181 transitions. [2021-11-19 14:47:27,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 5 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-19 14:47:27,187 INFO L276 IsEmpty]: Start isEmpty. Operand 65249 states and 127181 transitions. [2021-11-19 14:47:27,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-19 14:47:27,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:47:27,215 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:47:27,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:27,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:47:27,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:47:27,629 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:47:27,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:47:27,629 INFO L85 PathProgramCache]: Analyzing trace with hash -587356326, now seen corresponding path program 1 times [2021-11-19 14:47:27,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:47:27,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141839936] [2021-11-19 14:47:27,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:47:27,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:47:27,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:47:27,631 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:47:27,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f219b995-020c-461f-9aa5-5784e4b271bb/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:47:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:47:27,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 14:47:27,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:47:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 14:47:28,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:47:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-19 14:47:29,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:47:29,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141839936] [2021-11-19 14:47:29,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141839936] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:47:29,463 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:47:29,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2021-11-19 14:47:29,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688245934] [2021-11-19 14:47:29,463 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:47:29,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 14:47:29,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:47:29,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 14:47:29,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:47:29,465 INFO L87 Difference]: Start difference. First operand 65249 states and 127181 transitions. Second operand has 16 states, 16 states have (on average 9.0625) internal successors, (145), 12 states have internal predecessors, (145), 6 states have call successors, (29), 4 states have call predecessors, (29), 8 states have return successors, (28), 10 states have call predecessors, (28), 5 states have call successors, (28)