./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product03.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_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/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_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/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_be5961f8-25d9-445a-857f-be5bebfd48b7/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 4d8d329904ea0b1d6316e01ffefe794d3e2b31dff55810a28221762d0c9b0f86 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:59:20,923 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:59:20,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:59:20,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:59:20,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:59:20,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:59:20,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:59:20,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:59:20,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:59:20,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:59:20,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:59:20,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:59:20,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:59:20,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:59:20,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:59:20,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:59:20,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:59:20,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:59:20,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:59:20,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:59:21,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:59:21,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:59:21,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:59:21,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:59:21,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:59:21,008 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:59:21,009 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:59:21,010 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:59:21,010 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:59:21,012 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:59:21,012 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:59:21,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:59:21,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:59:21,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:59:21,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:59:21,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:59:21,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:59:21,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:59:21,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:59:21,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:59:21,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:59:21,022 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 13:59:21,061 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:59:21,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:59:21,063 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:59:21,063 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:59:21,063 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:59:21,063 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:59:21,064 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:59:21,064 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 13:59:21,064 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:59:21,072 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:59:21,073 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 13:59:21,073 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 13:59:21,073 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:59:21,074 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 13:59:21,074 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 13:59:21,074 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 13:59:21,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:59:21,075 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:59:21,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 13:59:21,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:59:21,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:59:21,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:59:21,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:59:21,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:59:21,077 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:59:21,077 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:59:21,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:59:21,077 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:59:21,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:59:21,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:59:21,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:59:21,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:59:21,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:59:21,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:59:21,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:59:21,081 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 13:59:21,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 13:59:21,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:59:21,082 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:59:21,082 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:59:21,082 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_be5961f8-25d9-445a-857f-be5bebfd48b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d8d329904ea0b1d6316e01ffefe794d3e2b31dff55810a28221762d0c9b0f86 [2021-11-19 13:59:21,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:59:21,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:59:21,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:59:21,359 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:59:21,360 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:59:21,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c [2021-11-19 13:59:21,487 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/data/c22ff5d8e/4ab89267c09c4edfa201822759dbd724/FLAGb4b1840cb [2021-11-19 13:59:22,139 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:59:22,140 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c [2021-11-19 13:59:22,163 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/data/c22ff5d8e/4ab89267c09c4edfa201822759dbd724/FLAGb4b1840cb [2021-11-19 13:59:22,324 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/data/c22ff5d8e/4ab89267c09c4edfa201822759dbd724 [2021-11-19 13:59:22,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:59:22,329 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:59:22,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:22,331 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:59:22,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:59:22,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:22" (1/1) ... [2021-11-19 13:59:22,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@750e1acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:22, skipping insertion in model container [2021-11-19 13:59:22,337 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:22" (1/1) ... [2021-11-19 13:59:22,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:59:22,441 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:59:22,986 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_be5961f8-25d9-445a-857f-be5bebfd48b7/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c[49188,49201] [2021-11-19 13:59:23,038 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:59:23,049 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 13:59:23,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3bd09f60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:23, skipping insertion in model container [2021-11-19 13:59:23,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:23,051 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 13:59:23,052 INFO L158 Benchmark]: Toolchain (without parser) took 722.71ms. Allocated memory is still 102.8MB. Free memory was 67.6MB in the beginning and 66.5MB in the end (delta: 1.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-19 13:59:23,053 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 79.7MB. Free memory was 34.4MB in the beginning and 34.4MB in the end (delta: 41.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 13:59:23,054 INFO L158 Benchmark]: CACSL2BoogieTranslator took 719.86ms. Allocated memory is still 102.8MB. Free memory was 67.3MB in the beginning and 66.5MB in the end (delta: 772.5kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-19 13:59:23,056 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 79.7MB. Free memory was 34.4MB in the beginning and 34.4MB in the end (delta: 41.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 719.86ms. Allocated memory is still 102.8MB. Free memory was 67.3MB in the beginning and 66.5MB in the end (delta: 772.5kB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 115]: 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_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/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_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/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_be5961f8-25d9-445a-857f-be5bebfd48b7/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 4d8d329904ea0b1d6316e01ffefe794d3e2b31dff55810a28221762d0c9b0f86 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 13:59:25,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 13:59:25,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 13:59:25,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 13:59:25,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 13:59:25,430 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 13:59:25,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 13:59:25,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 13:59:25,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 13:59:25,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 13:59:25,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 13:59:25,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 13:59:25,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 13:59:25,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 13:59:25,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 13:59:25,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 13:59:25,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 13:59:25,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 13:59:25,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 13:59:25,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 13:59:25,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 13:59:25,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 13:59:25,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 13:59:25,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 13:59:25,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 13:59:25,472 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 13:59:25,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 13:59:25,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 13:59:25,481 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 13:59:25,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 13:59:25,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 13:59:25,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 13:59:25,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 13:59:25,488 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 13:59:25,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 13:59:25,490 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 13:59:25,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 13:59:25,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 13:59:25,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 13:59:25,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 13:59:25,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 13:59:25,505 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 13:59:25,551 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 13:59:25,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 13:59:25,553 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 13:59:25,554 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 13:59:25,554 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 13:59:25,554 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 13:59:25,555 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 13:59:25,555 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 13:59:25,555 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 13:59:25,556 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 13:59:25,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 13:59:25,558 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 13:59:25,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 13:59:25,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 13:59:25,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 13:59:25,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 13:59:25,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 13:59:25,560 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 13:59:25,561 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 13:59:25,561 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 13:59:25,561 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 13:59:25,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 13:59:25,562 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 13:59:25,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 13:59:25,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 13:59:25,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 13:59:25,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 13:59:25,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:59:25,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 13:59:25,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 13:59:25,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 13:59:25,565 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 13:59:25,565 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 13:59:25,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 13:59:25,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 13:59:25,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 13:59:25,567 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_be5961f8-25d9-445a-857f-be5bebfd48b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d8d329904ea0b1d6316e01ffefe794d3e2b31dff55810a28221762d0c9b0f86 [2021-11-19 13:59:26,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 13:59:26,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 13:59:26,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 13:59:26,048 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 13:59:26,049 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 13:59:26,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c [2021-11-19 13:59:26,124 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/data/f006bb6bb/5d1a45f7468c428288b31c02c084a33a/FLAGa655f65a4 [2021-11-19 13:59:26,800 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 13:59:26,800 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c [2021-11-19 13:59:26,828 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/data/f006bb6bb/5d1a45f7468c428288b31c02c084a33a/FLAGa655f65a4 [2021-11-19 13:59:26,997 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/data/f006bb6bb/5d1a45f7468c428288b31c02c084a33a [2021-11-19 13:59:27,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 13:59:27,001 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 13:59:27,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:27,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 13:59:27,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 13:59:27,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:26" (1/1) ... [2021-11-19 13:59:27,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77c6f84f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:27, skipping insertion in model container [2021-11-19 13:59:27,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:59:26" (1/1) ... [2021-11-19 13:59:27,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 13:59:27,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:59:27,727 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_be5961f8-25d9-445a-857f-be5bebfd48b7/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c[49188,49201] [2021-11-19 13:59:27,816 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:59:27,836 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 13:59:27,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 13:59:28,007 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_be5961f8-25d9-445a-857f-be5bebfd48b7/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c[49188,49201] [2021-11-19 13:59:28,037 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:59:28,053 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 13:59:28,148 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_be5961f8-25d9-445a-857f-be5bebfd48b7/sv-benchmarks/c/product-lines/elevator_spec1_product03.cil.c[49188,49201] [2021-11-19 13:59:28,171 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 13:59:28,214 INFO L208 MainTranslator]: Completed translation [2021-11-19 13:59:28,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:28 WrapperNode [2021-11-19 13:59:28,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 13:59:28,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 13:59:28,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 13:59:28,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 13:59:28,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:28" (1/1) ... [2021-11-19 13:59:28,276 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:28" (1/1) ... [2021-11-19 13:59:28,349 INFO L137 Inliner]: procedures = 94, calls = 337, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1002 [2021-11-19 13:59:28,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 13:59:28,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 13:59:28,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 13:59:28,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 13:59:28,363 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:28" (1/1) ... [2021-11-19 13:59:28,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:28" (1/1) ... [2021-11-19 13:59:28,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:28" (1/1) ... [2021-11-19 13:59:28,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:28" (1/1) ... [2021-11-19 13:59:28,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:28" (1/1) ... [2021-11-19 13:59:28,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:28" (1/1) ... [2021-11-19 13:59:28,484 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:28" (1/1) ... [2021-11-19 13:59:28,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 13:59:28,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 13:59:28,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 13:59:28,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 13:59:28,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:28" (1/1) ... [2021-11-19 13:59:28,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 13:59:28,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 13:59:28,538 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 13:59:28,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 13:59:28,593 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-19 13:59:28,593 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-19 13:59:28,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 13:59:28,594 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-19 13:59:28,594 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-19 13:59:28,594 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 13:59:28,594 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 13:59:28,594 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 13:59:28,594 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 13:59:28,594 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 13:59:28,594 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 13:59:28,595 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 13:59:28,595 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 13:59:28,595 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 13:59:28,595 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 13:59:28,595 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 13:59:28,595 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 13:59:28,595 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-19 13:59:28,595 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-19 13:59:28,596 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 13:59:28,596 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 13:59:28,596 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 13:59:28,596 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 13:59:28,596 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 13:59:28,596 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 13:59:28,596 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 13:59:28,596 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 13:59:28,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 13:59:28,597 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 13:59:28,597 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 13:59:28,598 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 13:59:28,598 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 13:59:28,598 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 13:59:28,598 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 13:59:28,598 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 13:59:28,599 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 13:59:28,599 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 13:59:28,599 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 13:59:28,599 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 13:59:28,599 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 13:59:28,599 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2021-11-19 13:59:28,599 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2021-11-19 13:59:28,599 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 13:59:28,600 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 13:59:28,600 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 13:59:28,600 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 13:59:28,600 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 13:59:28,601 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 13:59:28,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 13:59:28,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 13:59:28,603 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 13:59:28,604 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 13:59:28,762 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 13:59:28,780 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 13:59:30,189 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 13:59:30,205 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 13:59:30,205 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 13:59:30,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:59:30 BoogieIcfgContainer [2021-11-19 13:59:30,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 13:59:30,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 13:59:30,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 13:59:30,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 13:59:30,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:59:26" (1/3) ... [2021-11-19 13:59:30,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b89e09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:59:30, skipping insertion in model container [2021-11-19 13:59:30,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:59:28" (2/3) ... [2021-11-19 13:59:30,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b89e09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:59:30, skipping insertion in model container [2021-11-19 13:59:30,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:59:30" (3/3) ... [2021-11-19 13:59:30,217 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product03.cil.c [2021-11-19 13:59:30,223 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 13:59:30,223 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 13:59:30,279 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 13:59:30,286 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 13:59:30,287 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 13:59:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand has 552 states, 429 states have (on average 1.68997668997669) internal successors, (725), 450 states have internal predecessors, (725), 97 states have call successors, (97), 24 states have call predecessors, (97), 24 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-19 13:59:30,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 13:59:30,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:30,380 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:30,381 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:30,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:30,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1206513483, now seen corresponding path program 1 times [2021-11-19 13:59:30,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:30,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920280189] [2021-11-19 13:59:30,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:30,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:30,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:30,417 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:30,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 13:59:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:31,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-19 13:59:31,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 13:59:31,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 13:59:31,743 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:31,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920280189] [2021-11-19 13:59:31,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [920280189] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:31,744 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:31,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-19 13:59:31,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656582900] [2021-11-19 13:59:31,748 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:31,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 13:59:31,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:31,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 13:59:31,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:59:31,798 INFO L87 Difference]: Start difference. First operand has 552 states, 429 states have (on average 1.68997668997669) internal successors, (725), 450 states have internal predecessors, (725), 97 states have call successors, (97), 24 states have call predecessors, (97), 24 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 13:59:31,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:31,908 INFO L93 Difference]: Finished difference Result 573 states and 949 transitions. [2021-11-19 13:59:31,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 13:59:31,918 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) Word has length 125 [2021-11-19 13:59:31,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:31,950 INFO L225 Difference]: With dead ends: 573 [2021-11-19 13:59:31,950 INFO L226 Difference]: Without dead ends: 544 [2021-11-19 13:59:31,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 13:59:31,960 INFO L933 BasicCegarLoop]: 910 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, 910 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 13:59:31,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:59:31,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-19 13:59:32,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-11-19 13:59:32,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 423 states have (on average 1.6879432624113475) internal successors, (714), 442 states have internal predecessors, (714), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:59:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 903 transitions. [2021-11-19 13:59:32,119 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 903 transitions. Word has length 125 [2021-11-19 13:59:32,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:32,124 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 903 transitions. [2021-11-19 13:59:32,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-19 13:59:32,125 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 903 transitions. [2021-11-19 13:59:32,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 13:59:32,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:32,134 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:32,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:32,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:32,349 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:32,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:32,350 INFO L85 PathProgramCache]: Analyzing trace with hash -423290177, now seen corresponding path program 1 times [2021-11-19 13:59:32,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:32,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839874754] [2021-11-19 13:59:32,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:32,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:32,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:32,353 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:32,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 13:59:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:32,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:59:32,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:59:33,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:59:33,509 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:33,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839874754] [2021-11-19 13:59:33,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839874754] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:59:33,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:59:33,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:59:33,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524798793] [2021-11-19 13:59:33,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:33,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:59:33,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:33,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:59:33,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:59:33,521 INFO L87 Difference]: Start difference. First operand 544 states and 903 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:33,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:33,664 INFO L93 Difference]: Finished difference Result 1079 states and 1798 transitions. [2021-11-19 13:59:33,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:59:33,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 127 [2021-11-19 13:59:33,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:33,675 INFO L225 Difference]: With dead ends: 1079 [2021-11-19 13:59:33,675 INFO L226 Difference]: Without dead ends: 544 [2021-11-19 13:59:33,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:59:33,686 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 14 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:33,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2660 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:59:33,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-19 13:59:33,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-11-19 13:59:33,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 423 states have (on average 1.6855791962174942) internal successors, (713), 442 states have internal predecessors, (713), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:59:33,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2021-11-19 13:59:33,733 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 127 [2021-11-19 13:59:33,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:33,734 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2021-11-19 13:59:33,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:33,735 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2021-11-19 13:59:33,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 13:59:33,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:33,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:33,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:33,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:33,971 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:33,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:33,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1248287939, now seen corresponding path program 1 times [2021-11-19 13:59:33,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:33,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340995142] [2021-11-19 13:59:33,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:33,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:33,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:33,977 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:33,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 13:59:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:34,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:59:34,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:59:34,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:59:34,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:34,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340995142] [2021-11-19 13:59:34,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340995142] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:59:34,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:59:34,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:59:34,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308057931] [2021-11-19 13:59:34,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:34,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:59:34,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:34,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:59:34,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:59:34,979 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:35,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:35,100 INFO L93 Difference]: Finished difference Result 1079 states and 1796 transitions. [2021-11-19 13:59:35,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:59:35,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 129 [2021-11-19 13:59:35,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:35,108 INFO L225 Difference]: With dead ends: 1079 [2021-11-19 13:59:35,108 INFO L226 Difference]: Without dead ends: 544 [2021-11-19 13:59:35,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:59:35,115 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 12 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:35,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2660 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:59:35,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-19 13:59:35,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-11-19 13:59:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 423 states have (on average 1.6832151300236406) internal successors, (712), 442 states have internal predecessors, (712), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:59:35,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 901 transitions. [2021-11-19 13:59:35,162 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 901 transitions. Word has length 129 [2021-11-19 13:59:35,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:35,162 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 901 transitions. [2021-11-19 13:59:35,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:35,163 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 901 transitions. [2021-11-19 13:59:35,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 13:59:35,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:35,169 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:35,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:35,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:35,385 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:35,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:35,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1104012479, now seen corresponding path program 1 times [2021-11-19 13:59:35,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:35,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95024537] [2021-11-19 13:59:35,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:35,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:35,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:35,392 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:35,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 13:59:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:35,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:59:35,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:59:36,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:59:36,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:36,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95024537] [2021-11-19 13:59:36,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95024537] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:59:36,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:59:36,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:59:36,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572810087] [2021-11-19 13:59:36,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:36,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:59:36,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:36,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:59:36,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:59:36,386 INFO L87 Difference]: Start difference. First operand 544 states and 901 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:36,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:36,467 INFO L93 Difference]: Finished difference Result 1083 states and 1799 transitions. [2021-11-19 13:59:36,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:59:36,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 131 [2021-11-19 13:59:36,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:36,474 INFO L225 Difference]: With dead ends: 1083 [2021-11-19 13:59:36,474 INFO L226 Difference]: Without dead ends: 550 [2021-11-19 13:59:36,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:59:36,479 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 13 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:36,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2660 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:59:36,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-19 13:59:36,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-11-19 13:59:36,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 428 states have (on average 1.675233644859813) internal successors, (717), 447 states have internal predecessors, (717), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:59:36,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 906 transitions. [2021-11-19 13:59:36,508 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 906 transitions. Word has length 131 [2021-11-19 13:59:36,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:36,508 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 906 transitions. [2021-11-19 13:59:36,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:36,509 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 906 transitions. [2021-11-19 13:59:36,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-19 13:59:36,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:36,514 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:36,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:36,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:36,731 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:36,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:36,732 INFO L85 PathProgramCache]: Analyzing trace with hash 98235219, now seen corresponding path program 1 times [2021-11-19 13:59:36,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:36,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647885389] [2021-11-19 13:59:36,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:36,733 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:36,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:36,734 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:36,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 13:59:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:37,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:59:37,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:37,353 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:59:37,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:59:37,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:37,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647885389] [2021-11-19 13:59:37,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647885389] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:59:37,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:59:37,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:59:37,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079301763] [2021-11-19 13:59:37,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:37,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:59:37,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:37,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:59:37,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:59:37,678 INFO L87 Difference]: Start difference. First operand 550 states and 906 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:37,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:37,750 INFO L93 Difference]: Finished difference Result 1082 states and 1790 transitions. [2021-11-19 13:59:37,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:59:37,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 132 [2021-11-19 13:59:37,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:37,756 INFO L225 Difference]: With dead ends: 1082 [2021-11-19 13:59:37,757 INFO L226 Difference]: Without dead ends: 550 [2021-11-19 13:59:37,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:59:37,764 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 8 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2661 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:37,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2661 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:59:37,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-19 13:59:37,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-11-19 13:59:37,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 428 states have (on average 1.6728971962616823) internal successors, (716), 447 states have internal predecessors, (716), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:59:37,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 905 transitions. [2021-11-19 13:59:37,798 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 905 transitions. Word has length 132 [2021-11-19 13:59:37,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:37,802 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 905 transitions. [2021-11-19 13:59:37,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:37,803 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 905 transitions. [2021-11-19 13:59:37,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 13:59:37,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:37,808 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:37,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:38,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:38,029 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:38,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:38,030 INFO L85 PathProgramCache]: Analyzing trace with hash -165126845, now seen corresponding path program 1 times [2021-11-19 13:59:38,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:38,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187938302] [2021-11-19 13:59:38,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:38,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:38,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:38,032 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:38,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 13:59:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:38,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:59:38,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:59:38,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:59:39,040 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:39,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187938302] [2021-11-19 13:59:39,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187938302] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:59:39,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:59:39,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:59:39,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523447951] [2021-11-19 13:59:39,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:39,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:59:39,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:39,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:59:39,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:59:39,043 INFO L87 Difference]: Start difference. First operand 550 states and 905 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:39,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:39,114 INFO L93 Difference]: Finished difference Result 1082 states and 1789 transitions. [2021-11-19 13:59:39,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:59:39,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 133 [2021-11-19 13:59:39,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:39,120 INFO L225 Difference]: With dead ends: 1082 [2021-11-19 13:59:39,121 INFO L226 Difference]: Without dead ends: 550 [2021-11-19 13:59:39,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:59:39,125 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 6 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2661 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:39,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 2661 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:59:39,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-19 13:59:39,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-11-19 13:59:39,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 428 states have (on average 1.6705607476635513) internal successors, (715), 447 states have internal predecessors, (715), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:59:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 904 transitions. [2021-11-19 13:59:39,151 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 904 transitions. Word has length 133 [2021-11-19 13:59:39,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:39,151 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 904 transitions. [2021-11-19 13:59:39,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:39,152 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 904 transitions. [2021-11-19 13:59:39,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 13:59:39,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:39,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:39,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:39,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:39,372 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:39,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:39,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1111545687, now seen corresponding path program 1 times [2021-11-19 13:59:39,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:39,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988124738] [2021-11-19 13:59:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:39,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:39,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:39,375 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:39,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 13:59:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:39,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:59:39,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:59:40,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:59:40,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:40,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988124738] [2021-11-19 13:59:40,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988124738] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:59:40,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:59:40,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-11-19 13:59:40,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163874572] [2021-11-19 13:59:40,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:40,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:59:40,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:40,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:59:40,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:59:40,556 INFO L87 Difference]: Start difference. First operand 550 states and 904 transitions. Second operand has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 13:59:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:40,787 INFO L93 Difference]: Finished difference Result 1099 states and 1817 transitions. [2021-11-19 13:59:40,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:59:40,789 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 134 [2021-11-19 13:59:40,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:40,803 INFO L225 Difference]: With dead ends: 1099 [2021-11-19 13:59:40,803 INFO L226 Difference]: Without dead ends: 571 [2021-11-19 13:59:40,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:59:40,808 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 148 mSDsluCounter, 4333 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 5221 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:40,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 5221 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:59:40,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-19 13:59:40,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 569. [2021-11-19 13:59:40,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 444 states have (on average 1.6689189189189189) internal successors, (741), 465 states have internal predecessors, (741), 98 states have call successors, (98), 25 states have call predecessors, (98), 26 states have return successors, (96), 91 states have call predecessors, (96), 93 states have call successors, (96) [2021-11-19 13:59:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 935 transitions. [2021-11-19 13:59:40,840 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 935 transitions. Word has length 134 [2021-11-19 13:59:40,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:40,841 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 935 transitions. [2021-11-19 13:59:40,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 13:59:40,841 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 935 transitions. [2021-11-19 13:59:40,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-19 13:59:40,847 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:40,847 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:40,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:41,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:41,069 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:41,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1896939304, now seen corresponding path program 1 times [2021-11-19 13:59:41,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:41,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524950880] [2021-11-19 13:59:41,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:41,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:41,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:41,071 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:41,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 13:59:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:41,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:59:41,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 13:59:41,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 13:59:42,156 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:42,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524950880] [2021-11-19 13:59:42,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524950880] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:59:42,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:59:42,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-11-19 13:59:42,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843551903] [2021-11-19 13:59:42,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:42,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:59:42,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:42,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:59:42,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 13:59:42,159 INFO L87 Difference]: Start difference. First operand 569 states and 935 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:42,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:42,255 INFO L93 Difference]: Finished difference Result 1112 states and 1839 transitions. [2021-11-19 13:59:42,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:59:42,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 134 [2021-11-19 13:59:42,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:42,264 INFO L225 Difference]: With dead ends: 1112 [2021-11-19 13:59:42,264 INFO L226 Difference]: Without dead ends: 565 [2021-11-19 13:59:42,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:59:42,269 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 8 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:42,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2660 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 13:59:42,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-19 13:59:42,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-11-19 13:59:42,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 442 states have (on average 1.669683257918552) internal successors, (738), 462 states have internal predecessors, (738), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-19 13:59:42,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 928 transitions. [2021-11-19 13:59:42,303 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 928 transitions. Word has length 134 [2021-11-19 13:59:42,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:42,304 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 928 transitions. [2021-11-19 13:59:42,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:42,304 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 928 transitions. [2021-11-19 13:59:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 13:59:42,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:42,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:42,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:42,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:42,530 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:42,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:42,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1455686114, now seen corresponding path program 1 times [2021-11-19 13:59:42,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:42,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480938110] [2021-11-19 13:59:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:42,531 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:42,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:42,532 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:42,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 13:59:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:42,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:59:42,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:59:43,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:59:43,587 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:43,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480938110] [2021-11-19 13:59:43,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480938110] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:59:43,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:59:43,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:59:43,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557943702] [2021-11-19 13:59:43,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:43,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:59:43,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:43,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:59:43,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:59:43,591 INFO L87 Difference]: Start difference. First operand 565 states and 928 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:43,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:43,791 INFO L93 Difference]: Finished difference Result 1138 states and 1884 transitions. [2021-11-19 13:59:43,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:59:43,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 135 [2021-11-19 13:59:43,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:43,799 INFO L225 Difference]: With dead ends: 1138 [2021-11-19 13:59:43,799 INFO L226 Difference]: Without dead ends: 565 [2021-11-19 13:59:43,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:59:43,803 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 134 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 2468 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:43,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 2468 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:59:43,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-19 13:59:43,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-11-19 13:59:43,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 442 states have (on average 1.658371040723982) internal successors, (733), 462 states have internal predecessors, (733), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-19 13:59:43,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 923 transitions. [2021-11-19 13:59:43,833 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 923 transitions. Word has length 135 [2021-11-19 13:59:43,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:43,834 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 923 transitions. [2021-11-19 13:59:43,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:43,834 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 923 transitions. [2021-11-19 13:59:43,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-19 13:59:43,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:43,840 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:43,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:44,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:44,053 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:44,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:44,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1566162568, now seen corresponding path program 1 times [2021-11-19 13:59:44,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:44,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1977684929] [2021-11-19 13:59:44,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:44,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:44,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:44,055 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:44,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 13:59:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:44,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:59:44,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:59:44,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:59:45,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:45,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1977684929] [2021-11-19 13:59:45,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1977684929] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:59:45,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:59:45,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:59:45,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008251687] [2021-11-19 13:59:45,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:45,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:59:45,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:45,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:59:45,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:59:45,210 INFO L87 Difference]: Start difference. First operand 565 states and 923 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:45,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:45,404 INFO L93 Difference]: Finished difference Result 1138 states and 1874 transitions. [2021-11-19 13:59:45,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:59:45,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 137 [2021-11-19 13:59:45,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:45,412 INFO L225 Difference]: With dead ends: 1138 [2021-11-19 13:59:45,412 INFO L226 Difference]: Without dead ends: 565 [2021-11-19 13:59:45,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:59:45,416 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 128 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 2468 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:45,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 2468 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:59:45,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-11-19 13:59:45,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-11-19 13:59:45,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 442 states have (on average 1.6470588235294117) internal successors, (728), 462 states have internal predecessors, (728), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-19 13:59:45,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 918 transitions. [2021-11-19 13:59:45,446 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 918 transitions. Word has length 137 [2021-11-19 13:59:45,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:45,447 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 918 transitions. [2021-11-19 13:59:45,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:45,447 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 918 transitions. [2021-11-19 13:59:45,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 13:59:45,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:45,452 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:45,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:45,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:45,674 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:45,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:45,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1163120766, now seen corresponding path program 1 times [2021-11-19 13:59:45,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:45,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128242875] [2021-11-19 13:59:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:45,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:45,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:45,676 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:45,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 13:59:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:46,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:59:46,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:59:46,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:59:46,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:46,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128242875] [2021-11-19 13:59:46,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128242875] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:59:46,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:59:46,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:59:46,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767035599] [2021-11-19 13:59:46,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:46,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:59:46,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:46,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:59:46,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:59:46,715 INFO L87 Difference]: Start difference. First operand 565 states and 918 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:46,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:46,915 INFO L93 Difference]: Finished difference Result 1159 states and 1895 transitions. [2021-11-19 13:59:46,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 13:59:46,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 139 [2021-11-19 13:59:46,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:46,923 INFO L225 Difference]: With dead ends: 1159 [2021-11-19 13:59:46,924 INFO L226 Difference]: Without dead ends: 595 [2021-11-19 13:59:46,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:59:46,928 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 143 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2478 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:46,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 2478 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:59:46,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-11-19 13:59:46,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 580. [2021-11-19 13:59:46,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 457 states have (on average 1.62582056892779) internal successors, (743), 476 states have internal predecessors, (743), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:59:46,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 932 transitions. [2021-11-19 13:59:46,953 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 932 transitions. Word has length 139 [2021-11-19 13:59:46,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:46,954 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 932 transitions. [2021-11-19 13:59:46,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:46,954 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 932 transitions. [2021-11-19 13:59:46,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-19 13:59:46,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:46,959 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:59:46,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:47,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:47,180 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:47,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:47,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1196342274, now seen corresponding path program 1 times [2021-11-19 13:59:47,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:47,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168906099] [2021-11-19 13:59:47,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:47,182 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:47,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:47,183 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:47,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 13:59:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:47,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:59:47,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:59:47,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:59:48,454 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:48,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168906099] [2021-11-19 13:59:48,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168906099] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:59:48,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:59:48,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-19 13:59:48,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088120950] [2021-11-19 13:59:48,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:48,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 13:59:48,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:48,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 13:59:48,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:59:48,459 INFO L87 Difference]: Start difference. First operand 580 states and 932 transitions. Second operand has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 13:59:48,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:48,627 INFO L93 Difference]: Finished difference Result 1123 states and 1816 transitions. [2021-11-19 13:59:48,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:59:48,629 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 139 [2021-11-19 13:59:48,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:48,634 INFO L225 Difference]: With dead ends: 1123 [2021-11-19 13:59:48,634 INFO L226 Difference]: Without dead ends: 574 [2021-11-19 13:59:48,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:59:48,638 INFO L933 BasicCegarLoop]: 891 mSDtfsCounter, 131 mSDsluCounter, 4298 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 5189 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:48,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 5189 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:59:48,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-19 13:59:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 559. [2021-11-19 13:59:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 436 states have (on average 1.6192660550458715) internal successors, (706), 455 states have internal predecessors, (706), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:59:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 895 transitions. [2021-11-19 13:59:48,663 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 895 transitions. Word has length 139 [2021-11-19 13:59:48,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:48,664 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 895 transitions. [2021-11-19 13:59:48,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 13:59:48,664 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 895 transitions. [2021-11-19 13:59:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-19 13:59:48,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:48,669 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:48,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:48,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:48,885 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:48,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:48,885 INFO L85 PathProgramCache]: Analyzing trace with hash -236171404, now seen corresponding path program 1 times [2021-11-19 13:59:48,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:48,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566647372] [2021-11-19 13:59:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:48,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:48,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:48,886 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:48,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 13:59:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:49,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:59:49,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:59:49,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:59:49,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:49,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566647372] [2021-11-19 13:59:49,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566647372] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:59:49,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:59:49,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:59:49,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008714700] [2021-11-19 13:59:49,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:49,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:59:49,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:49,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:59:49,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:59:49,978 INFO L87 Difference]: Start difference. First operand 559 states and 895 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:50,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:50,096 INFO L93 Difference]: Finished difference Result 1087 states and 1754 transitions. [2021-11-19 13:59:50,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:59:50,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 140 [2021-11-19 13:59:50,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:50,103 INFO L225 Difference]: With dead ends: 1087 [2021-11-19 13:59:50,103 INFO L226 Difference]: Without dead ends: 559 [2021-11-19 13:59:50,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:59:50,107 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 69 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2492 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 13:59:50,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 2492 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:59:50,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-19 13:59:50,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-19 13:59:50,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 436 states have (on average 1.6169724770642202) internal successors, (705), 455 states have internal predecessors, (705), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:59:50,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 894 transitions. [2021-11-19 13:59:50,131 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 894 transitions. Word has length 140 [2021-11-19 13:59:50,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:50,131 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 894 transitions. [2021-11-19 13:59:50,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:50,132 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 894 transitions. [2021-11-19 13:59:50,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-19 13:59:50,136 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:50,136 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:50,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-19 13:59:50,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:50,353 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:50,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:50,353 INFO L85 PathProgramCache]: Analyzing trace with hash 513835161, now seen corresponding path program 1 times [2021-11-19 13:59:50,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:50,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127306427] [2021-11-19 13:59:50,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:50,354 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:50,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:50,355 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:50,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 13:59:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:50,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 13:59:50,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:59:50,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 13:59:51,396 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:51,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127306427] [2021-11-19 13:59:51,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127306427] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:59:51,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:59:51,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-19 13:59:51,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264393355] [2021-11-19 13:59:51,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:51,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 13:59:51,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:51,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 13:59:51,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 13:59:51,399 INFO L87 Difference]: Start difference. First operand 559 states and 894 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:51,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:51,514 INFO L93 Difference]: Finished difference Result 1087 states and 1753 transitions. [2021-11-19 13:59:51,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 13:59:51,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 141 [2021-11-19 13:59:51,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:51,521 INFO L225 Difference]: With dead ends: 1087 [2021-11-19 13:59:51,557 INFO L226 Difference]: Without dead ends: 559 [2021-11-19 13:59:51,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-19 13:59:51,561 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 67 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2492 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:51,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 2492 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:59:51,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-19 13:59:51,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 559. [2021-11-19 13:59:51,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 436 states have (on average 1.614678899082569) internal successors, (704), 455 states have internal predecessors, (704), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:59:51,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 893 transitions. [2021-11-19 13:59:51,585 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 893 transitions. Word has length 141 [2021-11-19 13:59:51,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:51,585 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 893 transitions. [2021-11-19 13:59:51,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-19 13:59:51,586 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 893 transitions. [2021-11-19 13:59:51,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-19 13:59:51,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:51,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:51,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:51,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:51,811 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:51,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:51,812 INFO L85 PathProgramCache]: Analyzing trace with hash -827374225, now seen corresponding path program 1 times [2021-11-19 13:59:51,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:51,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374629194] [2021-11-19 13:59:51,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:51,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:51,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:51,813 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:51,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 13:59:52,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:52,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 13:59:52,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:59:52,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:59:53,163 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:53,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374629194] [2021-11-19 13:59:53,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374629194] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:59:53,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:59:53,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 13:59:53,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55624119] [2021-11-19 13:59:53,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:53,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:59:53,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:53,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:59:53,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:59:53,166 INFO L87 Difference]: Start difference. First operand 559 states and 893 transitions. Second operand has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 13:59:53,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:53,417 INFO L93 Difference]: Finished difference Result 1092 states and 1760 transitions. [2021-11-19 13:59:53,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:59:53,418 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 142 [2021-11-19 13:59:53,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:53,424 INFO L225 Difference]: With dead ends: 1092 [2021-11-19 13:59:53,424 INFO L226 Difference]: Without dead ends: 570 [2021-11-19 13:59:53,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:59:53,430 INFO L933 BasicCegarLoop]: 835 mSDtfsCounter, 109 mSDsluCounter, 4946 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 5781 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:53,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 5781 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:59:53,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-19 13:59:53,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 561. [2021-11-19 13:59:53,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 438 states have (on average 1.6095890410958904) internal successors, (705), 457 states have internal predecessors, (705), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:59:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 894 transitions. [2021-11-19 13:59:53,458 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 894 transitions. Word has length 142 [2021-11-19 13:59:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:53,459 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 894 transitions. [2021-11-19 13:59:53,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 13:59:53,459 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 894 transitions. [2021-11-19 13:59:53,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-19 13:59:53,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:53,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:53,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:53,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:53,715 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:53,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:53,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1441483236, now seen corresponding path program 1 times [2021-11-19 13:59:53,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:53,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612004875] [2021-11-19 13:59:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:53,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:53,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:53,718 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:53,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 13:59:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:54,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 974 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 13:59:54,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 13:59:54,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:59:54,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:54,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612004875] [2021-11-19 13:59:54,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612004875] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 13:59:54,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 13:59:54,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-11-19 13:59:54,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178299089] [2021-11-19 13:59:54,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:54,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:59:54,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:54,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:59:54,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 13:59:54,930 INFO L87 Difference]: Start difference. First operand 561 states and 894 transitions. Second operand has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 13:59:55,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:55,175 INFO L93 Difference]: Finished difference Result 1084 states and 1741 transitions. [2021-11-19 13:59:55,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 13:59:55,180 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) Word has length 143 [2021-11-19 13:59:55,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:55,186 INFO L225 Difference]: With dead ends: 1084 [2021-11-19 13:59:55,186 INFO L226 Difference]: Without dead ends: 566 [2021-11-19 13:59:55,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 13:59:55,190 INFO L933 BasicCegarLoop]: 837 mSDtfsCounter, 77 mSDsluCounter, 4952 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5789 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:55,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 5789 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 13:59:55,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-11-19 13:59:55,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 563. [2021-11-19 13:59:55,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 440 states have (on average 1.6045454545454545) internal successors, (706), 459 states have internal predecessors, (706), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:59:55,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 895 transitions. [2021-11-19 13:59:55,219 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 895 transitions. Word has length 143 [2021-11-19 13:59:55,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:55,219 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 895 transitions. [2021-11-19 13:59:55,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 3 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 2 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-19 13:59:55,220 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 895 transitions. [2021-11-19 13:59:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-19 13:59:55,224 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:55,225 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:55,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:55,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:55,446 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:55,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:55,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1630872409, now seen corresponding path program 1 times [2021-11-19 13:59:55,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:55,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529574357] [2021-11-19 13:59:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:55,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:55,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:55,449 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:55,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 13:59:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:55,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:59:55,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:59:56,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:59:56,533 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:56,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529574357] [2021-11-19 13:59:56,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1529574357] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:56,534 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:56,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:59:56,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024142010] [2021-11-19 13:59:56,535 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:56,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:59:56,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:56,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:59:56,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:59:56,538 INFO L87 Difference]: Start difference. First operand 563 states and 895 transitions. Second operand has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:59:56,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:56,679 INFO L93 Difference]: Finished difference Result 1030 states and 1668 transitions. [2021-11-19 13:59:56,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 13:59:56,680 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 144 [2021-11-19 13:59:56,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:56,686 INFO L225 Difference]: With dead ends: 1030 [2021-11-19 13:59:56,686 INFO L226 Difference]: Without dead ends: 556 [2021-11-19 13:59:56,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:59:56,691 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 110 mSDsluCounter, 3380 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 4229 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:56,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 4229 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:59:56,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-11-19 13:59:56,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 556. [2021-11-19 13:59:56,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 433 states have (on average 1.6120092378752886) internal successors, (698), 452 states have internal predecessors, (698), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:59:56,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 887 transitions. [2021-11-19 13:59:56,715 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 887 transitions. Word has length 144 [2021-11-19 13:59:56,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:56,716 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 887 transitions. [2021-11-19 13:59:56,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:59:56,716 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 887 transitions. [2021-11-19 13:59:56,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 13:59:56,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:56,721 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:56,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:56,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:56,937 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:56,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:56,937 INFO L85 PathProgramCache]: Analyzing trace with hash 25659822, now seen corresponding path program 1 times [2021-11-19 13:59:56,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:56,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832517002] [2021-11-19 13:59:56,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:56,938 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:56,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:56,940 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:56,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 13:59:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:57,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:59:57,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:59:57,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:59:58,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:58,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832517002] [2021-11-19 13:59:58,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832517002] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:58,153 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:58,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 13:59:58,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341967323] [2021-11-19 13:59:58,153 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:58,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 13:59:58,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:58,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 13:59:58,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 13:59:58,155 INFO L87 Difference]: Start difference. First operand 556 states and 887 transitions. Second operand has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:59:58,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:58,339 INFO L93 Difference]: Finished difference Result 1035 states and 1682 transitions. [2021-11-19 13:59:58,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:59:58,341 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 145 [2021-11-19 13:59:58,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:58,346 INFO L225 Difference]: With dead ends: 1035 [2021-11-19 13:59:58,346 INFO L226 Difference]: Without dead ends: 553 [2021-11-19 13:59:58,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 13:59:58,349 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 170 mSDsluCounter, 5027 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 5868 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:58,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 5868 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:59:58,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-11-19 13:59:58,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2021-11-19 13:59:58,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 430 states have (on average 1.6116279069767443) internal successors, (693), 449 states have internal predecessors, (693), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:59:58,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 882 transitions. [2021-11-19 13:59:58,374 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 882 transitions. Word has length 145 [2021-11-19 13:59:58,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:58,375 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 882 transitions. [2021-11-19 13:59:58,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.88888888888889) internal successors, (152), 9 states have internal predecessors, (152), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 13:59:58,375 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 882 transitions. [2021-11-19 13:59:58,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 13:59:58,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:58,380 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:58,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:58,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:58,598 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:58,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:58,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1020995118, now seen corresponding path program 1 times [2021-11-19 13:59:58,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:58,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440708929] [2021-11-19 13:59:58,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:58,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:58,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:58,600 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:58,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 13:59:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 13:59:58,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 13:59:58,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 13:59:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:59:59,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 13:59:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 13:59:59,550 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 13:59:59,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440708929] [2021-11-19 13:59:59,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440708929] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 13:59:59,550 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 13:59:59,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 13:59:59,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875957663] [2021-11-19 13:59:59,551 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 13:59:59,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 13:59:59,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 13:59:59,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 13:59:59,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 13:59:59,552 INFO L87 Difference]: Start difference. First operand 553 states and 882 transitions. Second operand has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-19 13:59:59,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 13:59:59,676 INFO L93 Difference]: Finished difference Result 1032 states and 1677 transitions. [2021-11-19 13:59:59,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 13:59:59,677 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 145 [2021-11-19 13:59:59,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 13:59:59,682 INFO L225 Difference]: With dead ends: 1032 [2021-11-19 13:59:59,682 INFO L226 Difference]: Without dead ends: 545 [2021-11-19 13:59:59,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 13:59:59,686 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 176 mSDsluCounter, 3339 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 4179 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 13:59:59,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 4179 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 13:59:59,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-11-19 13:59:59,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 545. [2021-11-19 13:59:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 422 states have (on average 1.6161137440758293) internal successors, (682), 441 states have internal predecessors, (682), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 13:59:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 871 transitions. [2021-11-19 13:59:59,711 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 871 transitions. Word has length 145 [2021-11-19 13:59:59,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 13:59:59,711 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 871 transitions. [2021-11-19 13:59:59,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-19 13:59:59,712 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 871 transitions. [2021-11-19 13:59:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-19 13:59:59,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 13:59:59,717 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 13:59:59,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 13:59:59,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 13:59:59,938 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 13:59:59,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 13:59:59,938 INFO L85 PathProgramCache]: Analyzing trace with hash -159360227, now seen corresponding path program 1 times [2021-11-19 13:59:59,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 13:59:59,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102602194] [2021-11-19 13:59:59,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 13:59:59,940 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 13:59:59,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 13:59:59,941 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 13:59:59,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:00:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:00,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:00:00,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:00:00,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:00:01,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:01,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102602194] [2021-11-19 14:00:01,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102602194] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:01,068 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:01,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:00:01,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286656544] [2021-11-19 14:00:01,069 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:01,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:00:01,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:01,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:00:01,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:00:01,071 INFO L87 Difference]: Start difference. First operand 545 states and 871 transitions. Second operand has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 14:00:01,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:01,265 INFO L93 Difference]: Finished difference Result 1018 states and 1655 transitions. [2021-11-19 14:00:01,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:00:01,267 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 146 [2021-11-19 14:00:01,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:01,272 INFO L225 Difference]: With dead ends: 1018 [2021-11-19 14:00:01,272 INFO L226 Difference]: Without dead ends: 545 [2021-11-19 14:00:01,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:00:01,275 INFO L933 BasicCegarLoop]: 836 mSDtfsCounter, 92 mSDsluCounter, 4920 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 5756 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:01,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 5756 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:00:01,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-11-19 14:00:01,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 545. [2021-11-19 14:00:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 422 states have (on average 1.613744075829384) internal successors, (681), 441 states have internal predecessors, (681), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 14:00:01,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 870 transitions. [2021-11-19 14:00:01,298 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 870 transitions. Word has length 146 [2021-11-19 14:00:01,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:01,299 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 870 transitions. [2021-11-19 14:00:01,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.454545454545455) internal successors, (159), 11 states have internal predecessors, (159), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 14:00:01,299 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 870 transitions. [2021-11-19 14:00:01,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 14:00:01,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:01,304 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:01,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:01,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:01,524 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:01,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:01,524 INFO L85 PathProgramCache]: Analyzing trace with hash -223770996, now seen corresponding path program 1 times [2021-11-19 14:00:01,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:01,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [450445370] [2021-11-19 14:00:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:01,525 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:01,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:01,526 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:01,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:00:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:01,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:00:01,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:00:02,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:00:02,770 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:02,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [450445370] [2021-11-19 14:00:02,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [450445370] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:02,771 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:02,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:00:02,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183959199] [2021-11-19 14:00:02,771 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:02,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:00:02,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:02,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:00:02,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:00:02,773 INFO L87 Difference]: Start difference. First operand 545 states and 870 transitions. Second operand has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 14:00:02,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:02,975 INFO L93 Difference]: Finished difference Result 1062 states and 1712 transitions. [2021-11-19 14:00:02,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:00:02,977 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 147 [2021-11-19 14:00:02,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:02,982 INFO L225 Difference]: With dead ends: 1062 [2021-11-19 14:00:02,982 INFO L226 Difference]: Without dead ends: 542 [2021-11-19 14:00:02,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:00:02,986 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 101 mSDsluCounter, 7332 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 8156 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:02,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 8156 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:00:02,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-19 14:00:03,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2021-11-19 14:00:03,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 419 states have (on average 1.6062052505966586) internal successors, (673), 438 states have internal predecessors, (673), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 14:00:03,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 862 transitions. [2021-11-19 14:00:03,009 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 862 transitions. Word has length 147 [2021-11-19 14:00:03,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:03,010 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 862 transitions. [2021-11-19 14:00:03,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 14:00:03,011 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 862 transitions. [2021-11-19 14:00:03,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-19 14:00:03,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:03,015 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:03,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:03,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:03,234 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:03,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:03,234 INFO L85 PathProgramCache]: Analyzing trace with hash 323218562, now seen corresponding path program 1 times [2021-11-19 14:00:03,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:03,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457981107] [2021-11-19 14:00:03,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:03,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:03,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:03,236 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:03,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:00:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:03,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:00:03,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:00:03,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:00:04,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:04,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457981107] [2021-11-19 14:00:04,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457981107] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:04,383 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:04,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:00:04,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048518733] [2021-11-19 14:00:04,383 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:04,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:00:04,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:04,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:00:04,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:00:04,385 INFO L87 Difference]: Start difference. First operand 542 states and 862 transitions. Second operand has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 14:00:04,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:04,547 INFO L93 Difference]: Finished difference Result 1009 states and 1635 transitions. [2021-11-19 14:00:04,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:00:04,550 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 148 [2021-11-19 14:00:04,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:04,555 INFO L225 Difference]: With dead ends: 1009 [2021-11-19 14:00:04,555 INFO L226 Difference]: Without dead ends: 542 [2021-11-19 14:00:04,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:00:04,559 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 100 mSDsluCounter, 5718 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 6543 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:04,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 6543 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:00:04,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-19 14:00:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2021-11-19 14:00:04,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 419 states have (on average 1.60381861575179) internal successors, (672), 438 states have internal predecessors, (672), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 14:00:04,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 861 transitions. [2021-11-19 14:00:04,582 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 861 transitions. Word has length 148 [2021-11-19 14:00:04,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:04,582 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 861 transitions. [2021-11-19 14:00:04,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 15.0) internal successors, (165), 11 states have internal predecessors, (165), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 14:00:04,583 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 861 transitions. [2021-11-19 14:00:04,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-19 14:00:04,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:04,587 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:04,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:04,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:04,801 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:04,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:04,801 INFO L85 PathProgramCache]: Analyzing trace with hash -285850819, now seen corresponding path program 1 times [2021-11-19 14:00:04,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:04,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [789526742] [2021-11-19 14:00:04,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:04,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:04,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:04,803 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:04,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:00:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:05,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:00:05,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:00:05,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:00:05,882 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:05,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [789526742] [2021-11-19 14:00:05,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [789526742] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:05,883 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:05,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:00:05,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470413465] [2021-11-19 14:00:05,883 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:05,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:00:05,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:05,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:00:05,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:00:05,885 INFO L87 Difference]: Start difference. First operand 542 states and 861 transitions. Second operand has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 14:00:06,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:06,088 INFO L93 Difference]: Finished difference Result 1047 states and 1680 transitions. [2021-11-19 14:00:06,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:00:06,089 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) Word has length 149 [2021-11-19 14:00:06,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:06,096 INFO L225 Difference]: With dead ends: 1047 [2021-11-19 14:00:06,096 INFO L226 Difference]: Without dead ends: 539 [2021-11-19 14:00:06,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:00:06,100 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 69 mSDsluCounter, 8124 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 8947 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:06,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 8947 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:00:06,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-11-19 14:00:06,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2021-11-19 14:00:06,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 416 states have (on average 1.5961538461538463) internal successors, (664), 435 states have internal predecessors, (664), 97 states have call successors, (97), 26 states have call predecessors, (97), 25 states have return successors, (92), 90 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-19 14:00:06,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 853 transitions. [2021-11-19 14:00:06,151 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 853 transitions. Word has length 149 [2021-11-19 14:00:06,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:06,151 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 853 transitions. [2021-11-19 14:00:06,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (26), 4 states have call predecessors, (26), 4 states have call successors, (26) [2021-11-19 14:00:06,152 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 853 transitions. [2021-11-19 14:00:06,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 14:00:06,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:06,157 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:06,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:06,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:06,389 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:06,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:06,389 INFO L85 PathProgramCache]: Analyzing trace with hash -822475609, now seen corresponding path program 1 times [2021-11-19 14:00:06,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:06,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456083782] [2021-11-19 14:00:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:06,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:06,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:06,391 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:06,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:00:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:06,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:00:06,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:00:07,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:00:07,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:07,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456083782] [2021-11-19 14:00:07,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456083782] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:07,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:07,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:00:07,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793824807] [2021-11-19 14:00:07,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:07,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:00:07,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:07,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:00:07,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:00:07,586 INFO L87 Difference]: Start difference. First operand 539 states and 853 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:00:08,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:08,397 INFO L93 Difference]: Finished difference Result 1002 states and 1644 transitions. [2021-11-19 14:00:08,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:00:08,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 150 [2021-11-19 14:00:08,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:08,402 INFO L225 Difference]: With dead ends: 1002 [2021-11-19 14:00:08,402 INFO L226 Difference]: Without dead ends: 543 [2021-11-19 14:00:08,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:00:08,405 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 769 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 2081 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:08,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 2081 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:00:08,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-11-19 14:00:08,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2021-11-19 14:00:08,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 419 states have (on average 1.5918854415274464) internal successors, (667), 438 states have internal predecessors, (667), 97 states have call successors, (97), 27 states have call predecessors, (97), 26 states have return successors, (93), 90 states have call predecessors, (93), 92 states have call successors, (93) [2021-11-19 14:00:08,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 857 transitions. [2021-11-19 14:00:08,436 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 857 transitions. Word has length 150 [2021-11-19 14:00:08,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:08,437 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 857 transitions. [2021-11-19 14:00:08,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:00:08,437 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 857 transitions. [2021-11-19 14:00:08,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-19 14:00:08,443 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:08,443 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:08,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:08,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:08,663 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:08,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:08,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1896374087, now seen corresponding path program 1 times [2021-11-19 14:00:08,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:08,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088071605] [2021-11-19 14:00:08,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:08,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:08,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:08,665 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:08,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:00:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:09,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:00:09,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:00:09,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:00:09,908 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:09,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088071605] [2021-11-19 14:00:09,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088071605] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:09,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:09,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:00:09,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59824251] [2021-11-19 14:00:09,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:09,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:00:09,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:09,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:00:09,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:00:09,910 INFO L87 Difference]: Start difference. First operand 543 states and 857 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:00:10,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:10,754 INFO L93 Difference]: Finished difference Result 1011 states and 1651 transitions. [2021-11-19 14:00:10,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:00:10,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 152 [2021-11-19 14:00:10,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:10,760 INFO L225 Difference]: With dead ends: 1011 [2021-11-19 14:00:10,760 INFO L226 Difference]: Without dead ends: 548 [2021-11-19 14:00:10,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:00:10,764 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 754 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:10,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 2082 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:00:10,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-11-19 14:00:10,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2021-11-19 14:00:10,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 423 states have (on average 1.58628841607565) internal successors, (671), 442 states have internal predecessors, (671), 97 states have call successors, (97), 28 states have call predecessors, (97), 27 states have return successors, (94), 90 states have call predecessors, (94), 92 states have call successors, (94) [2021-11-19 14:00:10,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 862 transitions. [2021-11-19 14:00:10,809 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 862 transitions. Word has length 152 [2021-11-19 14:00:10,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:10,810 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 862 transitions. [2021-11-19 14:00:10,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:00:10,811 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 862 transitions. [2021-11-19 14:00:10,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-19 14:00:10,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:10,815 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:10,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:11,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:11,035 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:11,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:11,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1493371545, now seen corresponding path program 1 times [2021-11-19 14:00:11,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:11,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701501003] [2021-11-19 14:00:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:11,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:11,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:11,037 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:11,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:00:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:11,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:00:11,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:00:11,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:00:12,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:12,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701501003] [2021-11-19 14:00:12,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701501003] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:12,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:12,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:00:12,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671492825] [2021-11-19 14:00:12,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:12,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:00:12,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:12,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:00:12,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:00:12,265 INFO L87 Difference]: Start difference. First operand 548 states and 862 transitions. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:00:13,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:13,014 INFO L93 Difference]: Finished difference Result 1022 states and 1660 transitions. [2021-11-19 14:00:13,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:00:13,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 154 [2021-11-19 14:00:13,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:13,019 INFO L225 Difference]: With dead ends: 1022 [2021-11-19 14:00:13,019 INFO L226 Difference]: Without dead ends: 554 [2021-11-19 14:00:13,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:00:13,026 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 755 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:13,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 2082 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:00:13,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-19 14:00:13,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2021-11-19 14:00:13,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 428 states have (on average 1.5794392523364487) internal successors, (676), 447 states have internal predecessors, (676), 97 states have call successors, (97), 29 states have call predecessors, (97), 28 states have return successors, (95), 90 states have call predecessors, (95), 92 states have call successors, (95) [2021-11-19 14:00:13,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 868 transitions. [2021-11-19 14:00:13,057 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 868 transitions. Word has length 154 [2021-11-19 14:00:13,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:13,057 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 868 transitions. [2021-11-19 14:00:13,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:00:13,058 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 868 transitions. [2021-11-19 14:00:13,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:00:13,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:13,061 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:13,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:13,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:13,281 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:13,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:13,281 INFO L85 PathProgramCache]: Analyzing trace with hash 218086001, now seen corresponding path program 1 times [2021-11-19 14:00:13,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:13,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1484102555] [2021-11-19 14:00:13,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:13,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:13,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:13,283 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:13,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-19 14:00:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:13,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:00:13,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:00:13,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:00:14,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:14,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1484102555] [2021-11-19 14:00:14,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1484102555] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:14,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:00:14,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:00:14,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331390384] [2021-11-19 14:00:14,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:14,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:00:14,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:14,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:00:14,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:00:14,459 INFO L87 Difference]: Start difference. First operand 554 states and 868 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:00:15,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:15,219 INFO L93 Difference]: Finished difference Result 1035 states and 1671 transitions. [2021-11-19 14:00:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:00:15,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 156 [2021-11-19 14:00:15,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:15,225 INFO L225 Difference]: With dead ends: 1035 [2021-11-19 14:00:15,225 INFO L226 Difference]: Without dead ends: 561 [2021-11-19 14:00:15,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:00:15,228 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 767 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:15,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [784 Valid, 2082 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:00:15,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-19 14:00:15,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 561. [2021-11-19 14:00:15,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 434 states have (on average 1.5714285714285714) internal successors, (682), 453 states have internal predecessors, (682), 97 states have call successors, (97), 30 states have call predecessors, (97), 29 states have return successors, (96), 90 states have call predecessors, (96), 92 states have call successors, (96) [2021-11-19 14:00:15,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 875 transitions. [2021-11-19 14:00:15,253 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 875 transitions. Word has length 156 [2021-11-19 14:00:15,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:15,253 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 875 transitions. [2021-11-19 14:00:15,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-19 14:00:15,254 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 875 transitions. [2021-11-19 14:00:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-19 14:00:15,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:15,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:15,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:15,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:15,478 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:15,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:15,478 INFO L85 PathProgramCache]: Analyzing trace with hash 354055207, now seen corresponding path program 1 times [2021-11-19 14:00:15,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:15,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864330838] [2021-11-19 14:00:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:15,479 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:15,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:15,480 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:15,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-19 14:00:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:15,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:00:15,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:00:16,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:00:17,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:17,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864330838] [2021-11-19 14:00:17,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864330838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:17,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [112596503] [2021-11-19 14:00:17,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:17,332 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:00:17,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:00:17,333 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:00:17,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-19 14:00:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:17,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:00:17,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:00:18,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:00:18,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [112596503] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:18,723 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:00:18,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [11, 10] total 21 [2021-11-19 14:00:18,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661677595] [2021-11-19 14:00:18,724 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:18,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:00:18,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:18,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:00:18,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-11-19 14:00:18,725 INFO L87 Difference]: Start difference. First operand 561 states and 875 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:00:19,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:19,279 INFO L93 Difference]: Finished difference Result 1038 states and 1657 transitions. [2021-11-19 14:00:19,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:00:19,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 158 [2021-11-19 14:00:19,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:19,285 INFO L225 Difference]: With dead ends: 1038 [2021-11-19 14:00:19,285 INFO L226 Difference]: Without dead ends: 557 [2021-11-19 14:00:19,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 610 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 14:00:19,289 INFO L933 BasicCegarLoop]: 739 mSDtfsCounter, 1223 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:19,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1223 Valid, 753 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:00:19,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-11-19 14:00:19,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 557. [2021-11-19 14:00:19,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 432 states have (on average 1.5671296296296295) internal successors, (677), 450 states have internal predecessors, (677), 95 states have call successors, (95), 30 states have call predecessors, (95), 29 states have return successors, (95), 89 states have call predecessors, (95), 91 states have call successors, (95) [2021-11-19 14:00:19,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 867 transitions. [2021-11-19 14:00:19,317 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 867 transitions. Word has length 158 [2021-11-19 14:00:19,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:19,318 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 867 transitions. [2021-11-19 14:00:19,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 5 states have call successors, (29), 4 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-19 14:00:19,319 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 867 transitions. [2021-11-19 14:00:19,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-19 14:00:19,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:19,322 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:19,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:19,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-19 14:00:19,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:19,726 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:19,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:19,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1909330790, now seen corresponding path program 1 times [2021-11-19 14:00:19,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:19,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310076304] [2021-11-19 14:00:19,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:19,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:19,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:19,728 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:19,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-19 14:00:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:20,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:00:20,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:00:20,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:00:21,499 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:21,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310076304] [2021-11-19 14:00:21,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310076304] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:21,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [523981856] [2021-11-19 14:00:21,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:21,499 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:00:21,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:00:21,506 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:00:21,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-19 14:00:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:21,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:00:21,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:22,294 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:00:22,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:00:23,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [523981856] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:23,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499683993] [2021-11-19 14:00:23,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:23,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:00:23,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:00:23,097 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:00:23,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-19 14:00:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:23,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:00:23,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:00:23,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:24,684 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:00:24,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499683993] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:24,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:00:24,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 18 [2021-11-19 14:00:24,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995416718] [2021-11-19 14:00:24,685 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:00:24,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 14:00:24,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:24,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 14:00:24,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:00:24,688 INFO L87 Difference]: Start difference. First operand 557 states and 867 transitions. Second operand has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-19 14:00:33,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:33,721 INFO L93 Difference]: Finished difference Result 1776 states and 2888 transitions. [2021-11-19 14:00:33,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:00:33,722 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) Word has length 159 [2021-11-19 14:00:33,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:33,733 INFO L225 Difference]: With dead ends: 1776 [2021-11-19 14:00:33,733 INFO L226 Difference]: Without dead ends: 1299 [2021-11-19 14:00:33,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 962 GetRequests, 934 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-11-19 14:00:33,738 INFO L933 BasicCegarLoop]: 1682 mSDtfsCounter, 5728 mSDsluCounter, 5022 mSDsCounter, 0 mSdLazyCounter, 8772 mSolverCounterSat, 2268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5803 SdHoareTripleChecker+Valid, 6704 SdHoareTripleChecker+Invalid, 11040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2268 IncrementalHoareTripleChecker+Valid, 8772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:33,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5803 Valid, 6704 Invalid, 11040 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2268 Valid, 8772 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2021-11-19 14:00:33,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-11-19 14:00:33,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1149. [2021-11-19 14:00:33,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 870 states have (on average 1.589655172413793) internal successors, (1383), 909 states have internal predecessors, (1383), 219 states have call successors, (219), 53 states have call predecessors, (219), 59 states have return successors, (242), 217 states have call predecessors, (242), 215 states have call successors, (242) [2021-11-19 14:00:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1844 transitions. [2021-11-19 14:00:33,826 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1844 transitions. Word has length 159 [2021-11-19 14:00:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:33,827 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1844 transitions. [2021-11-19 14:00:33,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.61111111111111) internal successors, (191), 14 states have internal predecessors, (191), 8 states have call successors, (31), 5 states have call predecessors, (31), 10 states have return successors, (32), 12 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-19 14:00:33,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1844 transitions. [2021-11-19 14:00:33,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-19 14:00:33,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:33,834 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:33,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:34,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:34,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:34,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:34,449 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:34,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:34,449 INFO L85 PathProgramCache]: Analyzing trace with hash 958198293, now seen corresponding path program 1 times [2021-11-19 14:00:34,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:34,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186916504] [2021-11-19 14:00:34,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:34,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:34,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:34,451 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:34,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-19 14:00:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:34,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:00:34,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:00:35,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:00:35,680 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:35,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186916504] [2021-11-19 14:00:35,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186916504] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:35,680 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:35,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-19 14:00:35,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47936933] [2021-11-19 14:00:35,680 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:35,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 14:00:35,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:35,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 14:00:35,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:00:35,681 INFO L87 Difference]: Start difference. First operand 1149 states and 1844 transitions. Second operand has 10 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-19 14:00:35,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:35,862 INFO L93 Difference]: Finished difference Result 1629 states and 2622 transitions. [2021-11-19 14:00:35,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:00:35,864 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 161 [2021-11-19 14:00:35,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:35,869 INFO L225 Difference]: With dead ends: 1629 [2021-11-19 14:00:35,869 INFO L226 Difference]: Without dead ends: 550 [2021-11-19 14:00:35,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:00:35,874 INFO L933 BasicCegarLoop]: 806 mSDtfsCounter, 89 mSDsluCounter, 5564 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 6370 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:35,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 6370 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:00:35,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-19 14:00:35,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2021-11-19 14:00:35,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 427 states have (on average 1.5620608899297423) internal successors, (667), 445 states have internal predecessors, (667), 93 states have call successors, (93), 30 states have call predecessors, (93), 29 states have return successors, (93), 87 states have call predecessors, (93), 89 states have call successors, (93) [2021-11-19 14:00:35,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 853 transitions. [2021-11-19 14:00:35,905 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 853 transitions. Word has length 161 [2021-11-19 14:00:35,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:35,905 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 853 transitions. [2021-11-19 14:00:35,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 3 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-19 14:00:35,906 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 853 transitions. [2021-11-19 14:00:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-19 14:00:35,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:35,909 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:35,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:36,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:36,129 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:36,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:36,129 INFO L85 PathProgramCache]: Analyzing trace with hash 123424149, now seen corresponding path program 1 times [2021-11-19 14:00:36,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:36,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733026796] [2021-11-19 14:00:36,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:36,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:36,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:36,131 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:36,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-19 14:00:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:36,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:00:36,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:00:36,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:00:37,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:37,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733026796] [2021-11-19 14:00:37,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733026796] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:37,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [430161317] [2021-11-19 14:00:37,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:37,791 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:00:37,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:00:37,792 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:00:37,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-19 14:00:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:38,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:00:38,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:00:38,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:00:39,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [430161317] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:39,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110142218] [2021-11-19 14:00:39,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:39,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:00:39,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:00:39,275 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:00:39,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-19 14:00:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:39,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-19 14:00:39,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:00:39,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:00:40,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110142218] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:40,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:00:40,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 14 [2021-11-19 14:00:40,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164232763] [2021-11-19 14:00:40,658 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:00:40,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:00:40,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:40,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:00:40,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:00:40,660 INFO L87 Difference]: Start difference. First operand 550 states and 853 transitions. Second operand has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-19 14:00:42,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:42,718 INFO L93 Difference]: Finished difference Result 1028 states and 1636 transitions. [2021-11-19 14:00:42,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:00:42,719 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) Word has length 165 [2021-11-19 14:00:42,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:42,722 INFO L225 Difference]: With dead ends: 1028 [2021-11-19 14:00:42,722 INFO L226 Difference]: Without dead ends: 556 [2021-11-19 14:00:42,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 974 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:00:42,725 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 1259 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1259 SdHoareTripleChecker+Valid, 1932 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:42,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1259 Valid, 1932 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 14:00:42,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-11-19 14:00:42,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 554. [2021-11-19 14:00:42,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 430 states have (on average 1.558139534883721) internal successors, (670), 448 states have internal predecessors, (670), 93 states have call successors, (93), 30 states have call predecessors, (93), 30 states have return successors, (98), 88 states have call predecessors, (98), 89 states have call successors, (98) [2021-11-19 14:00:42,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 861 transitions. [2021-11-19 14:00:42,760 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 861 transitions. Word has length 165 [2021-11-19 14:00:42,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:42,760 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 861 transitions. [2021-11-19 14:00:42,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.642857142857142) internal successors, (191), 12 states have internal predecessors, (191), 8 states have call successors, (32), 5 states have call predecessors, (32), 8 states have return successors, (32), 10 states have call predecessors, (32), 7 states have call successors, (32) [2021-11-19 14:00:42,761 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 861 transitions. [2021-11-19 14:00:42,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-19 14:00:42,764 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:42,764 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:42,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:43,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:43,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:43,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:00:43,386 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:43,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:43,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1540362455, now seen corresponding path program 1 times [2021-11-19 14:00:43,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:43,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125778678] [2021-11-19 14:00:43,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:43,387 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:43,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:43,388 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:43,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-19 14:00:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:43,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:00:43,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:00:44,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:00:44,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:44,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125778678] [2021-11-19 14:00:44,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125778678] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:44,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1624150030] [2021-11-19 14:00:44,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:44,611 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:00:44,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:00:44,611 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:00:44,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-19 14:00:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:44,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:00:44,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:00:45,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:00:45,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1624150030] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:45,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777144449] [2021-11-19 14:00:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:45,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:00:45,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:00:45,686 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:00:45,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-19 14:00:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:45,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:00:45,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:00:46,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:00:46,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777144449] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:00:46,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:00:46,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 11 [2021-11-19 14:00:46,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881524489] [2021-11-19 14:00:46,815 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:00:46,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:00:46,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:46,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:00:46,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:00:46,817 INFO L87 Difference]: Start difference. First operand 554 states and 861 transitions. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-19 14:00:51,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:51,615 INFO L93 Difference]: Finished difference Result 1975 states and 3189 transitions. [2021-11-19 14:00:51,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 14:00:51,617 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) Word has length 166 [2021-11-19 14:00:51,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:51,625 INFO L225 Difference]: With dead ends: 1975 [2021-11-19 14:00:51,625 INFO L226 Difference]: Without dead ends: 1499 [2021-11-19 14:00:51,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 990 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-11-19 14:00:51,629 INFO L933 BasicCegarLoop]: 1293 mSDtfsCounter, 3774 mSDsluCounter, 2131 mSDsCounter, 0 mSdLazyCounter, 4642 mSolverCounterSat, 1126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3853 SdHoareTripleChecker+Valid, 3424 SdHoareTripleChecker+Invalid, 5768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1126 IncrementalHoareTripleChecker+Valid, 4642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:51,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3853 Valid, 3424 Invalid, 5768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1126 Valid, 4642 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-19 14:00:51,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2021-11-19 14:00:51,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1441. [2021-11-19 14:00:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1110 states have (on average 1.581981981981982) internal successors, (1756), 1155 states have internal predecessors, (1756), 253 states have call successors, (253), 77 states have call predecessors, (253), 77 states have return successors, (282), 245 states have call predecessors, (282), 249 states have call successors, (282) [2021-11-19 14:00:51,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 2291 transitions. [2021-11-19 14:00:51,729 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 2291 transitions. Word has length 166 [2021-11-19 14:00:51,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:51,730 INFO L470 AbstractCegarLoop]: Abstraction has 1441 states and 2291 transitions. [2021-11-19 14:00:51,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 6 states have call successors, (27), 5 states have call predecessors, (27), 6 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2021-11-19 14:00:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 2291 transitions. [2021-11-19 14:00:51,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-19 14:00:51,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:51,734 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:51,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:51,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-19 14:00:52,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:52,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:00:52,356 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:52,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:52,356 INFO L85 PathProgramCache]: Analyzing trace with hash 2063772274, now seen corresponding path program 1 times [2021-11-19 14:00:52,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:52,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1443888175] [2021-11-19 14:00:52,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:52,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:52,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:52,358 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:52,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-19 14:00:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:52,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:00:52,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:00:53,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:00:53,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:00:53,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1443888175] [2021-11-19 14:00:53,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1443888175] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:53,703 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:53,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2021-11-19 14:00:53,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307067044] [2021-11-19 14:00:53,703 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:53,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 14:00:53,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:00:53,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 14:00:53,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:00:53,705 INFO L87 Difference]: Start difference. First operand 1441 states and 2291 transitions. Second operand has 12 states, 12 states have (on average 13.75) internal successors, (165), 12 states have internal predecessors, (165), 8 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2021-11-19 14:00:58,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:58,467 INFO L93 Difference]: Finished difference Result 4073 states and 6586 transitions. [2021-11-19 14:00:58,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 14:00:58,467 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.75) internal successors, (165), 12 states have internal predecessors, (165), 8 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) Word has length 168 [2021-11-19 14:00:58,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:58,486 INFO L225 Difference]: With dead ends: 4073 [2021-11-19 14:00:58,486 INFO L226 Difference]: Without dead ends: 3008 [2021-11-19 14:00:58,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-11-19 14:00:58,492 INFO L933 BasicCegarLoop]: 989 mSDtfsCounter, 3317 mSDsluCounter, 1818 mSDsCounter, 0 mSdLazyCounter, 4358 mSolverCounterSat, 689 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3390 SdHoareTripleChecker+Valid, 2807 SdHoareTripleChecker+Invalid, 5047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 689 IncrementalHoareTripleChecker+Valid, 4358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:58,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3390 Valid, 2807 Invalid, 5047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [689 Valid, 4358 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-19 14:00:58,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-11-19 14:00:58,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2843. [2021-11-19 14:00:58,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2843 states, 2192 states have (on average 1.5816605839416058) internal successors, (3467), 2282 states have internal predecessors, (3467), 486 states have call successors, (486), 144 states have call predecessors, (486), 164 states have return successors, (610), 477 states have call predecessors, (610), 482 states have call successors, (610) [2021-11-19 14:00:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2843 states to 2843 states and 4563 transitions. [2021-11-19 14:00:58,764 INFO L78 Accepts]: Start accepts. Automaton has 2843 states and 4563 transitions. Word has length 168 [2021-11-19 14:00:58,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:58,765 INFO L470 AbstractCegarLoop]: Abstraction has 2843 states and 4563 transitions. [2021-11-19 14:00:58,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.75) internal successors, (165), 12 states have internal predecessors, (165), 8 states have call successors, (29), 5 states have call predecessors, (29), 5 states have return successors, (27), 8 states have call predecessors, (27), 7 states have call successors, (27) [2021-11-19 14:00:58,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2843 states and 4563 transitions. [2021-11-19 14:00:58,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-19 14:00:58,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:58,769 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:58,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:58,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:00:58,981 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:58,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:58,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1583264046, now seen corresponding path program 1 times [2021-11-19 14:00:58,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:00:58,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1904484160] [2021-11-19 14:00:58,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:58,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:00:58,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:00:58,983 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:00:58,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-19 14:00:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:59,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 14:00:59,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:00:59,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:01:00,758 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:00,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1904484160] [2021-11-19 14:01:00,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1904484160] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:00,759 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:00,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 18 [2021-11-19 14:01:00,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559169859] [2021-11-19 14:01:00,760 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:00,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 14:01:00,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:00,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 14:01:00,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-19 14:01:00,762 INFO L87 Difference]: Start difference. First operand 2843 states and 4563 transitions. Second operand has 18 states, 18 states have (on average 10.0) internal successors, (180), 14 states have internal predecessors, (180), 8 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-19 14:01:03,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:03,820 INFO L93 Difference]: Finished difference Result 5284 states and 8538 transitions. [2021-11-19 14:01:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:01:03,821 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.0) internal successors, (180), 14 states have internal predecessors, (180), 8 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) Word has length 170 [2021-11-19 14:01:03,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:03,840 INFO L225 Difference]: With dead ends: 5284 [2021-11-19 14:01:03,840 INFO L226 Difference]: Without dead ends: 2819 [2021-11-19 14:01:03,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-11-19 14:01:03,849 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 1500 mSDsluCounter, 2394 mSDsCounter, 0 mSdLazyCounter, 4237 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1500 SdHoareTripleChecker+Valid, 3117 SdHoareTripleChecker+Invalid, 4608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 4237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:03,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1500 Valid, 3117 Invalid, 4608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 4237 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-19 14:01:03,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2021-11-19 14:01:04,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 2819. [2021-11-19 14:01:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2179 states have (on average 1.5819183111519046) internal successors, (3447), 2267 states have internal predecessors, (3447), 479 states have call successors, (479), 142 states have call predecessors, (479), 160 states have return successors, (599), 470 states have call predecessors, (599), 475 states have call successors, (599) [2021-11-19 14:01:04,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4525 transitions. [2021-11-19 14:01:04,042 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4525 transitions. Word has length 170 [2021-11-19 14:01:04,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:04,043 INFO L470 AbstractCegarLoop]: Abstraction has 2819 states and 4525 transitions. [2021-11-19 14:01:04,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.0) internal successors, (180), 14 states have internal predecessors, (180), 8 states have call successors, (32), 5 states have call predecessors, (32), 10 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2021-11-19 14:01:04,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4525 transitions. [2021-11-19 14:01:04,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-19 14:01:04,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:04,047 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:04,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:04,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:04,261 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:04,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:04,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1492568044, now seen corresponding path program 1 times [2021-11-19 14:01:04,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:04,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042879037] [2021-11-19 14:01:04,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:04,262 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:04,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:04,263 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:04,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-19 14:01:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:04,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 14:01:04,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:01:05,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:01:05,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:05,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042879037] [2021-11-19 14:01:05,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042879037] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:05,957 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:05,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 14 [2021-11-19 14:01:05,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763974714] [2021-11-19 14:01:05,957 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:05,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 14:01:05,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:05,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 14:01:05,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:01:05,959 INFO L87 Difference]: Start difference. First operand 2819 states and 4525 transitions. Second operand has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 7 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) [2021-11-19 14:01:12,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:12,916 INFO L93 Difference]: Finished difference Result 7474 states and 12037 transitions. [2021-11-19 14:01:12,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 14:01:12,918 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 7 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) Word has length 173 [2021-11-19 14:01:12,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:12,952 INFO L225 Difference]: With dead ends: 7474 [2021-11-19 14:01:12,952 INFO L226 Difference]: Without dead ends: 4981 [2021-11-19 14:01:12,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2021-11-19 14:01:12,964 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 3892 mSDsluCounter, 2485 mSDsCounter, 0 mSdLazyCounter, 6796 mSolverCounterSat, 1126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3967 SdHoareTripleChecker+Valid, 3417 SdHoareTripleChecker+Invalid, 7922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1126 IncrementalHoareTripleChecker+Valid, 6796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:12,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3967 Valid, 3417 Invalid, 7922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1126 Valid, 6796 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-11-19 14:01:12,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4981 states. [2021-11-19 14:01:13,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4981 to 4931. [2021-11-19 14:01:13,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 3794 states have (on average 1.56615709014233) internal successors, (5942), 3947 states have internal predecessors, (5942), 839 states have call successors, (839), 268 states have call predecessors, (839), 297 states have return successors, (1075), 823 states have call predecessors, (1075), 835 states have call successors, (1075) [2021-11-19 14:01:13,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 7856 transitions. [2021-11-19 14:01:13,315 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 7856 transitions. Word has length 173 [2021-11-19 14:01:13,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:13,316 INFO L470 AbstractCegarLoop]: Abstraction has 4931 states and 7856 transitions. [2021-11-19 14:01:13,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 12 states have internal predecessors, (173), 7 states have call successors, (29), 5 states have call predecessors, (29), 6 states have return successors, (29), 9 states have call predecessors, (29), 6 states have call successors, (29) [2021-11-19 14:01:13,316 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 7856 transitions. [2021-11-19 14:01:13,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-19 14:01:13,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:13,320 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:13,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:13,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:13,533 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:13,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:13,533 INFO L85 PathProgramCache]: Analyzing trace with hash 723387861, now seen corresponding path program 1 times [2021-11-19 14:01:13,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:13,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8909058] [2021-11-19 14:01:13,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:13,534 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:13,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:13,536 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:13,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-19 14:01:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:13,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:01:13,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:01:14,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:14,588 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 14:01:14,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:14,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8909058] [2021-11-19 14:01:14,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [8909058] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:14,588 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:14,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 14:01:14,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453510917] [2021-11-19 14:01:14,589 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:14,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:01:14,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:14,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:01:14,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:01:14,591 INFO L87 Difference]: Start difference. First operand 4931 states and 7856 transitions. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-19 14:01:14,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:14,961 INFO L93 Difference]: Finished difference Result 9810 states and 15820 transitions. [2021-11-19 14:01:14,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:01:14,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 180 [2021-11-19 14:01:14,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:14,995 INFO L225 Difference]: With dead ends: 9810 [2021-11-19 14:01:14,995 INFO L226 Difference]: Without dead ends: 4931 [2021-11-19 14:01:15,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:01:15,013 INFO L933 BasicCegarLoop]: 846 mSDtfsCounter, 567 mSDsluCounter, 2210 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 3056 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:15,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 3056 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:01:15,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4931 states. [2021-11-19 14:01:15,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4931 to 4931. [2021-11-19 14:01:15,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 3794 states have (on average 1.5498154981549817) internal successors, (5880), 3947 states have internal predecessors, (5880), 839 states have call successors, (839), 268 states have call predecessors, (839), 297 states have return successors, (1075), 823 states have call predecessors, (1075), 835 states have call successors, (1075) [2021-11-19 14:01:15,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 7794 transitions. [2021-11-19 14:01:15,405 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 7794 transitions. Word has length 180 [2021-11-19 14:01:15,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:15,406 INFO L470 AbstractCegarLoop]: Abstraction has 4931 states and 7794 transitions. [2021-11-19 14:01:15,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 6 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-19 14:01:15,407 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 7794 transitions. [2021-11-19 14:01:15,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-19 14:01:15,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:15,412 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:15,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:15,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:15,632 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:15,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:15,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1302051725, now seen corresponding path program 1 times [2021-11-19 14:01:15,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:15,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247998357] [2021-11-19 14:01:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:15,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:15,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:15,634 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:15,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-19 14:01:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:16,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:01:16,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-19 14:01:16,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-19 14:01:16,917 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:16,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247998357] [2021-11-19 14:01:16,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247998357] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:16,918 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:16,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2021-11-19 14:01:16,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915915101] [2021-11-19 14:01:16,918 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:16,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:01:16,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:16,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:01:16,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:01:16,920 INFO L87 Difference]: Start difference. First operand 4931 states and 7794 transitions. Second operand has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-19 14:01:20,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:20,847 INFO L93 Difference]: Finished difference Result 9964 states and 15875 transitions. [2021-11-19 14:01:20,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 14:01:20,848 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) Word has length 185 [2021-11-19 14:01:20,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:20,883 INFO L225 Difference]: With dead ends: 9964 [2021-11-19 14:01:20,884 INFO L226 Difference]: Without dead ends: 5502 [2021-11-19 14:01:20,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 365 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-19 14:01:20,901 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 3119 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 3518 mSolverCounterSat, 847 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3196 SdHoareTripleChecker+Valid, 2237 SdHoareTripleChecker+Invalid, 4365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 847 IncrementalHoareTripleChecker+Valid, 3518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:20,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3196 Valid, 2237 Invalid, 4365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [847 Valid, 3518 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-19 14:01:20,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5502 states. [2021-11-19 14:01:21,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5502 to 5113. [2021-11-19 14:01:21,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5113 states, 3930 states have (on average 1.5414758269720101) internal successors, (6058), 4093 states have internal predecessors, (6058), 858 states have call successors, (858), 286 states have call predecessors, (858), 324 states have return successors, (1118), 841 states have call predecessors, (1118), 854 states have call successors, (1118) [2021-11-19 14:01:21,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5113 states to 5113 states and 8034 transitions. [2021-11-19 14:01:21,278 INFO L78 Accepts]: Start accepts. Automaton has 5113 states and 8034 transitions. Word has length 185 [2021-11-19 14:01:21,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:21,278 INFO L470 AbstractCegarLoop]: Abstraction has 5113 states and 8034 transitions. [2021-11-19 14:01:21,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.11111111111111) internal successors, (172), 9 states have internal predecessors, (172), 6 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (29), 6 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-19 14:01:21,279 INFO L276 IsEmpty]: Start isEmpty. Operand 5113 states and 8034 transitions. [2021-11-19 14:01:21,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-19 14:01:21,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:21,283 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:21,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:21,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:21,504 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:21,504 INFO L85 PathProgramCache]: Analyzing trace with hash 978350052, now seen corresponding path program 1 times [2021-11-19 14:01:21,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:21,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167183065] [2021-11-19 14:01:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:21,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:21,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:21,507 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:21,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-19 14:01:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:22,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:01:22,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-19 14:01:22,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-19 14:01:23,398 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:23,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167183065] [2021-11-19 14:01:23,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167183065] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:23,399 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:23,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:01:23,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303342783] [2021-11-19 14:01:23,400 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:23,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:01:23,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:23,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:01:23,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:01:23,401 INFO L87 Difference]: Start difference. First operand 5113 states and 8034 transitions. Second operand has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 11 states have internal predecessors, (187), 7 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (32), 9 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-19 14:01:29,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:29,876 INFO L93 Difference]: Finished difference Result 13554 states and 21551 transitions. [2021-11-19 14:01:29,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 14:01:29,878 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 11 states have internal predecessors, (187), 7 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (32), 9 states have call predecessors, (32), 6 states have call successors, (32) Word has length 190 [2021-11-19 14:01:29,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:29,930 INFO L225 Difference]: With dead ends: 13554 [2021-11-19 14:01:29,930 INFO L226 Difference]: Without dead ends: 8908 [2021-11-19 14:01:29,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-19 14:01:29,951 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 3678 mSDsluCounter, 2286 mSDsCounter, 0 mSdLazyCounter, 6512 mSolverCounterSat, 1059 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3750 SdHoareTripleChecker+Valid, 3111 SdHoareTripleChecker+Invalid, 7571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1059 IncrementalHoareTripleChecker+Valid, 6512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:29,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3750 Valid, 3111 Invalid, 7571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1059 Valid, 6512 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-11-19 14:01:29,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8908 states. [2021-11-19 14:01:30,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8908 to 8858. [2021-11-19 14:01:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8858 states, 6809 states have (on average 1.5495667498898518) internal successors, (10551), 7071 states have internal predecessors, (10551), 1506 states have call successors, (1506), 518 states have call predecessors, (1506), 542 states have return successors, (1918), 1472 states have call predecessors, (1918), 1502 states have call successors, (1918) [2021-11-19 14:01:30,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8858 states to 8858 states and 13975 transitions. [2021-11-19 14:01:30,591 INFO L78 Accepts]: Start accepts. Automaton has 8858 states and 13975 transitions. Word has length 190 [2021-11-19 14:01:30,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:30,593 INFO L470 AbstractCegarLoop]: Abstraction has 8858 states and 13975 transitions. [2021-11-19 14:01:30,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.384615384615385) internal successors, (187), 11 states have internal predecessors, (187), 7 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (32), 9 states have call predecessors, (32), 6 states have call successors, (32) [2021-11-19 14:01:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 8858 states and 13975 transitions. [2021-11-19 14:01:30,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-19 14:01:30,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:30,597 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:30,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:30,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:30,817 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:30,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:30,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1930413850, now seen corresponding path program 1 times [2021-11-19 14:01:30,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:30,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350072180] [2021-11-19 14:01:30,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:30,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:30,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:30,820 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:30,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-11-19 14:01:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:31,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-19 14:01:31,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:01:31,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:32,632 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:01:32,633 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:32,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350072180] [2021-11-19 14:01:32,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350072180] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:32,633 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:32,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-11-19 14:01:32,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399841670] [2021-11-19 14:01:32,634 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:32,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 14:01:32,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:32,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 14:01:32,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:01:32,636 INFO L87 Difference]: Start difference. First operand 8858 states and 13975 transitions. Second operand has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 13 states have internal predecessors, (193), 7 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (33), 11 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-19 14:01:41,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:41,088 INFO L93 Difference]: Finished difference Result 23665 states and 38518 transitions. [2021-11-19 14:01:41,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 14:01:41,089 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 13 states have internal predecessors, (193), 7 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (33), 11 states have call predecessors, (33), 6 states have call successors, (33) Word has length 190 [2021-11-19 14:01:41,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:41,178 INFO L225 Difference]: With dead ends: 23665 [2021-11-19 14:01:41,178 INFO L226 Difference]: Without dead ends: 13864 [2021-11-19 14:01:41,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-11-19 14:01:41,226 INFO L933 BasicCegarLoop]: 1005 mSDtfsCounter, 3424 mSDsluCounter, 3361 mSDsCounter, 0 mSdLazyCounter, 8266 mSolverCounterSat, 1043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3522 SdHoareTripleChecker+Valid, 4366 SdHoareTripleChecker+Invalid, 9309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1043 IncrementalHoareTripleChecker+Valid, 8266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:41,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3522 Valid, 4366 Invalid, 9309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1043 Valid, 8266 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2021-11-19 14:01:41,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13864 states. [2021-11-19 14:01:41,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13864 to 13159. [2021-11-19 14:01:41,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13159 states, 10099 states have (on average 1.5364887612634914) internal successors, (15517), 10503 states have internal predecessors, (15517), 2230 states have call successors, (2230), 802 states have call predecessors, (2230), 829 states have return successors, (2935), 2153 states have call predecessors, (2935), 2226 states have call successors, (2935) [2021-11-19 14:01:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13159 states to 13159 states and 20682 transitions. [2021-11-19 14:01:42,028 INFO L78 Accepts]: Start accepts. Automaton has 13159 states and 20682 transitions. Word has length 190 [2021-11-19 14:01:42,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:42,028 INFO L470 AbstractCegarLoop]: Abstraction has 13159 states and 20682 transitions. [2021-11-19 14:01:42,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 13 states have internal predecessors, (193), 7 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (33), 11 states have call predecessors, (33), 6 states have call successors, (33) [2021-11-19 14:01:42,028 INFO L276 IsEmpty]: Start isEmpty. Operand 13159 states and 20682 transitions. [2021-11-19 14:01:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-19 14:01:42,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:42,032 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:42,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-11-19 14:01:42,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:01:42,249 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:42,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:42,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2026551840, now seen corresponding path program 1 times [2021-11-19 14:01:42,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:42,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1211037232] [2021-11-19 14:01:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:42,252 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:42,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:42,252 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:42,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-19 14:01:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:42,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:01:42,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 14:01:42,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 14:01:43,587 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:43,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1211037232] [2021-11-19 14:01:43,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1211037232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:43,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [303639987] [2021-11-19 14:01:43,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:43,588 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:43,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:01:43,589 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:01:43,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-19 14:01:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:43,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:01:43,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:01:44,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:01:44,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [303639987] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:44,759 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:01:44,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-19 14:01:44,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341740176] [2021-11-19 14:01:44,760 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:44,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:01:44,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:44,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:01:44,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:01:44,762 INFO L87 Difference]: Start difference. First operand 13159 states and 20682 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-19 14:01:46,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:46,010 INFO L93 Difference]: Finished difference Result 39161 states and 62145 transitions. [2021-11-19 14:01:46,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:01:46,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 191 [2021-11-19 14:01:46,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:46,152 INFO L225 Difference]: With dead ends: 39161 [2021-11-19 14:01:46,152 INFO L226 Difference]: Without dead ends: 26080 [2021-11-19 14:01:46,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 753 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:01:46,197 INFO L933 BasicCegarLoop]: 1376 mSDtfsCounter, 745 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:46,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 2140 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:01:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26080 states. [2021-11-19 14:01:47,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26080 to 25886. [2021-11-19 14:01:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25886 states, 19884 states have (on average 1.5345503922751962) internal successors, (30513), 20676 states have internal predecessors, (30513), 4361 states have call successors, (4361), 1584 states have call predecessors, (4361), 1640 states have return successors, (6043), 4225 states have call predecessors, (6043), 4357 states have call successors, (6043) [2021-11-19 14:01:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25886 states to 25886 states and 40917 transitions. [2021-11-19 14:01:47,831 INFO L78 Accepts]: Start accepts. Automaton has 25886 states and 40917 transitions. Word has length 191 [2021-11-19 14:01:47,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:47,831 INFO L470 AbstractCegarLoop]: Abstraction has 25886 states and 40917 transitions. [2021-11-19 14:01:47,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-19 14:01:47,832 INFO L276 IsEmpty]: Start isEmpty. Operand 25886 states and 40917 transitions. [2021-11-19 14:01:47,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-19 14:01:47,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:47,836 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:47,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:48,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2021-11-19 14:01:48,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:48,255 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:48,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:48,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1601265987, now seen corresponding path program 1 times [2021-11-19 14:01:48,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:48,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456163938] [2021-11-19 14:01:48,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:48,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:48,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:48,257 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:48,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-11-19 14:01:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:48,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:01:48,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 14:01:49,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 14:01:49,616 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:49,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456163938] [2021-11-19 14:01:49,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456163938] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:49,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1943191187] [2021-11-19 14:01:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:49,617 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-19 14:01:49,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 [2021-11-19 14:01:49,619 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-19 14:01:49,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2021-11-19 14:01:49,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:49,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 14:01:49,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 14:01:50,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 14:01:50,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1943191187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:50,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472268174] [2021-11-19 14:01:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:50,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:01:50,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:01:50,910 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:01:50,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-19 14:01:51,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:51,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 14:01:51,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:51,456 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 14:01:51,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 14:01:52,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472268174] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 14:01:52,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-19 14:01:52,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 4, 5, 5] total 9 [2021-11-19 14:01:52,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218695112] [2021-11-19 14:01:52,182 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-19 14:01:52,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:01:52,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:52,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:01:52,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:01:52,184 INFO L87 Difference]: Start difference. First operand 25886 states and 40917 transitions. Second operand has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-19 14:01:55,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:55,747 INFO L93 Difference]: Finished difference Result 39520 states and 62515 transitions. [2021-11-19 14:01:55,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:01:55,753 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) Word has length 192 [2021-11-19 14:01:55,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:55,907 INFO L225 Difference]: With dead ends: 39520 [2021-11-19 14:01:55,908 INFO L226 Difference]: Without dead ends: 26785 [2021-11-19 14:01:55,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1149 GetRequests, 1140 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:01:55,955 INFO L933 BasicCegarLoop]: 906 mSDtfsCounter, 3162 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 2179 mSolverCounterSat, 887 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3234 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 3066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 887 IncrementalHoareTripleChecker+Valid, 2179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:55,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3234 Valid, 1725 Invalid, 3066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [887 Valid, 2179 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 14:01:55,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26785 states. [2021-11-19 14:01:57,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26785 to 26149. [2021-11-19 14:01:57,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26149 states, 20070 states have (on average 1.5301943198804184) internal successors, (30711), 20919 states have internal predecessors, (30711), 4385 states have call successors, (4385), 1588 states have call predecessors, (4385), 1693 states have return successors, (6021), 4241 states have call predecessors, (6021), 4381 states have call successors, (6021) [2021-11-19 14:01:58,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26149 states to 26149 states and 41117 transitions. [2021-11-19 14:01:58,046 INFO L78 Accepts]: Start accepts. Automaton has 26149 states and 41117 transitions. Word has length 192 [2021-11-19 14:01:58,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:58,047 INFO L470 AbstractCegarLoop]: Abstraction has 26149 states and 41117 transitions. [2021-11-19 14:01:58,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 23.555555555555557) internal successors, (212), 9 states have internal predecessors, (212), 6 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (35), 8 states have call predecessors, (35), 5 states have call successors, (35) [2021-11-19 14:01:58,048 INFO L276 IsEmpty]: Start isEmpty. Operand 26149 states and 41117 transitions. [2021-11-19 14:01:58,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-19 14:01:58,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:58,052 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:58,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:58,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2021-11-19 14:01:58,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-11-19 14:01:58,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:01:58,670 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:58,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:58,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1556626945, now seen corresponding path program 1 times [2021-11-19 14:01:58,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:01:58,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099334910] [2021-11-19 14:01:58,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:58,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:01:58,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:01:58,673 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:01:58,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-19 14:01:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:59,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:01:59,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:01:59,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:01:59,945 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:01:59,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099334910] [2021-11-19 14:01:59,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099334910] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:59,946 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:59,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:01:59,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80482841] [2021-11-19 14:01:59,946 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:59,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:01:59,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:01:59,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:01:59,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:01:59,948 INFO L87 Difference]: Start difference. First operand 26149 states and 41117 transitions. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-19 14:02:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:02,884 INFO L93 Difference]: Finished difference Result 64618 states and 101505 transitions. [2021-11-19 14:02:02,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:02:02,885 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29) Word has length 195 [2021-11-19 14:02:02,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:03,085 INFO L225 Difference]: With dead ends: 64618 [2021-11-19 14:02:03,085 INFO L226 Difference]: Without dead ends: 39180 [2021-11-19 14:02:03,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:02:03,152 INFO L933 BasicCegarLoop]: 992 mSDtfsCounter, 463 mSDsluCounter, 4158 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 5150 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:03,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 5150 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:02:03,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39180 states. [2021-11-19 14:02:05,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39180 to 38077. [2021-11-19 14:02:05,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38077 states, 29353 states have (on average 1.4748747998501004) internal successors, (43292), 30329 states have internal predecessors, (43292), 6007 states have call successors, (6007), 2561 states have call predecessors, (6007), 2716 states have return successors, (9361), 5786 states have call predecessors, (9361), 6003 states have call successors, (9361) [2021-11-19 14:02:05,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38077 states to 38077 states and 58660 transitions. [2021-11-19 14:02:05,834 INFO L78 Accepts]: Start accepts. Automaton has 38077 states and 58660 transitions. Word has length 195 [2021-11-19 14:02:05,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:05,835 INFO L470 AbstractCegarLoop]: Abstraction has 38077 states and 58660 transitions. [2021-11-19 14:02:05,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (30), 3 states have call predecessors, (30), 5 states have return successors, (29), 4 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-19 14:02:05,835 INFO L276 IsEmpty]: Start isEmpty. Operand 38077 states and 58660 transitions. [2021-11-19 14:02:05,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-19 14:02:05,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:05,837 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:05,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:06,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:06,038 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:06,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:06,039 INFO L85 PathProgramCache]: Analyzing trace with hash 319855873, now seen corresponding path program 1 times [2021-11-19 14:02:06,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:06,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542810431] [2021-11-19 14:02:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:06,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:06,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:06,040 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:06,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-19 14:02:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:06,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 14:02:06,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:02:06,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:02:07,307 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:07,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542810431] [2021-11-19 14:02:07,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542810431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:07,307 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:07,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2021-11-19 14:02:07,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968588883] [2021-11-19 14:02:07,307 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:07,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:02:07,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:07,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:02:07,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:02:07,309 INFO L87 Difference]: Start difference. First operand 38077 states and 58660 transitions. Second operand has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 8 states have call successors, (40), 6 states have call predecessors, (40), 5 states have return successors, (39), 8 states have call predecessors, (39), 7 states have call successors, (39) [2021-11-19 14:02:12,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:12,208 INFO L93 Difference]: Finished difference Result 75488 states and 118755 transitions. [2021-11-19 14:02:12,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:02:12,209 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 8 states have call successors, (40), 6 states have call predecessors, (40), 5 states have return successors, (39), 8 states have call predecessors, (39), 7 states have call successors, (39) Word has length 195 [2021-11-19 14:02:12,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:12,535 INFO L225 Difference]: With dead ends: 75488 [2021-11-19 14:02:12,535 INFO L226 Difference]: Without dead ends: 38266 [2021-11-19 14:02:12,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:02:12,638 INFO L933 BasicCegarLoop]: 1071 mSDtfsCounter, 1664 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 2125 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 2227 SdHoareTripleChecker+Invalid, 2700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 2125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:12,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1713 Valid, 2227 Invalid, 2700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 2125 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-19 14:02:12,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38266 states. [2021-11-19 14:02:15,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38266 to 37675. [2021-11-19 14:02:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37675 states, 27807 states have (on average 1.5011328082856834) internal successors, (41742), 29409 states have internal predecessors, (41742), 7703 states have call successors, (7703), 1947 states have call predecessors, (7703), 2164 states have return successors, (10213), 7494 states have call predecessors, (10213), 7699 states have call successors, (10213) [2021-11-19 14:02:15,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37675 states to 37675 states and 59658 transitions. [2021-11-19 14:02:15,561 INFO L78 Accepts]: Start accepts. Automaton has 37675 states and 59658 transitions. Word has length 195 [2021-11-19 14:02:15,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:15,561 INFO L470 AbstractCegarLoop]: Abstraction has 37675 states and 59658 transitions. [2021-11-19 14:02:15,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.125) internal successors, (225), 8 states have internal predecessors, (225), 8 states have call successors, (40), 6 states have call predecessors, (40), 5 states have return successors, (39), 8 states have call predecessors, (39), 7 states have call successors, (39) [2021-11-19 14:02:15,562 INFO L276 IsEmpty]: Start isEmpty. Operand 37675 states and 59658 transitions. [2021-11-19 14:02:15,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-19 14:02:15,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:15,565 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:15,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:15,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:15,766 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:15,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:15,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1249884933, now seen corresponding path program 1 times [2021-11-19 14:02:15,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:15,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304640917] [2021-11-19 14:02:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:15,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:15,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:15,768 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:15,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-19 14:02:16,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:16,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:02:16,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:02:16,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:02:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:02:17,102 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:02:17,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304640917] [2021-11-19 14:02:17,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304640917] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:02:17,102 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:02:17,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 6] imperfect sequences [] total 9 [2021-11-19 14:02:17,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943838894] [2021-11-19 14:02:17,103 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:02:17,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 14:02:17,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:02:17,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 14:02:17,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:02:17,104 INFO L87 Difference]: Start difference. First operand 37675 states and 59658 transitions. Second operand has 9 states, 9 states have (on average 27.333333333333332) internal successors, (246), 9 states have internal predecessors, (246), 4 states have call successors, (41), 3 states have call predecessors, (41), 4 states have return successors, (40), 4 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-19 14:02:20,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:02:20,507 INFO L93 Difference]: Finished difference Result 38085 states and 60367 transitions. [2021-11-19 14:02:20,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:02:20,508 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 27.333333333333332) internal successors, (246), 9 states have internal predecessors, (246), 4 states have call successors, (41), 3 states have call predecessors, (41), 4 states have return successors, (40), 4 states have call predecessors, (40), 3 states have call successors, (40) Word has length 197 [2021-11-19 14:02:20,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:02:20,689 INFO L225 Difference]: With dead ends: 38085 [2021-11-19 14:02:20,690 INFO L226 Difference]: Without dead ends: 38066 [2021-11-19 14:02:20,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:02:20,711 INFO L933 BasicCegarLoop]: 795 mSDtfsCounter, 1514 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 2102 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:02:20,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 2102 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:02:20,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38066 states. [2021-11-19 14:02:23,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38066 to 37800. [2021-11-19 14:02:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37800 states, 27911 states have (on average 1.5005553366056394) internal successors, (41882), 29508 states have internal predecessors, (41882), 7724 states have call successors, (7724), 1947 states have call predecessors, (7724), 2164 states have return successors, (10242), 7520 states have call predecessors, (10242), 7720 states have call successors, (10242) [2021-11-19 14:02:23,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37800 states to 37800 states and 59848 transitions. [2021-11-19 14:02:23,669 INFO L78 Accepts]: Start accepts. Automaton has 37800 states and 59848 transitions. Word has length 197 [2021-11-19 14:02:23,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:02:23,670 INFO L470 AbstractCegarLoop]: Abstraction has 37800 states and 59848 transitions. [2021-11-19 14:02:23,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.333333333333332) internal successors, (246), 9 states have internal predecessors, (246), 4 states have call successors, (41), 3 states have call predecessors, (41), 4 states have return successors, (40), 4 states have call predecessors, (40), 3 states have call successors, (40) [2021-11-19 14:02:23,670 INFO L276 IsEmpty]: Start isEmpty. Operand 37800 states and 59848 transitions. [2021-11-19 14:02:23,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-19 14:02:23,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:02:23,674 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:02:23,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-11-19 14:02:23,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:02:23,875 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:02:23,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:02:23,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1374917526, now seen corresponding path program 1 times [2021-11-19 14:02:23,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:02:23,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800639009] [2021-11-19 14:02:23,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:02:23,877 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:02:23,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:02:23,878 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:02:23,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5961f8-25d9-445a-857f-be5bebfd48b7/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-19 14:02:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:02:24,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 14:02:24,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:02:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 14:02:24,551 INFO L328 TraceCheckSpWp]: Computing backward predicates...