./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_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_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/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_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/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_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/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 ec740d4c0b0b941516a7691cfe22f258e1a0e4fdd205bb4a0c04151c297a8c86 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:14:38,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:14:38,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:14:38,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:14:38,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:14:38,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:14:38,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:14:38,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:14:38,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:14:38,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:14:38,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:14:38,975 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:14:38,976 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:14:38,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:14:38,979 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:14:38,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:14:38,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:14:38,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:14:38,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:14:38,988 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:14:38,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:14:38,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:14:38,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:14:38,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:14:38,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:14:38,999 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:14:39,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:14:39,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:14:39,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:14:39,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:14:39,004 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:14:39,005 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:14:39,006 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:14:39,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:14:39,009 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:14:39,009 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:14:39,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:14:39,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:14:39,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:14:39,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:14:39,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:14:39,017 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:14:39,061 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:14:39,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:14:39,063 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:14:39,064 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:14:39,064 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:14:39,064 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:14:39,064 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:14:39,064 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:14:39,065 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:14:39,065 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:14:39,072 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:14:39,072 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:14:39,073 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:14:39,073 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:14:39,073 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:14:39,073 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:14:39,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:14:39,074 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:14:39,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:14:39,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:14:39,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:14:39,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:14:39,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:14:39,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:14:39,076 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:14:39,076 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:14:39,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:14:39,076 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:14:39,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:14:39,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:14:39,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:14:39,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:39,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:14:39,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:14:39,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:14:39,080 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:14:39,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:14:39,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:14:39,080 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:14:39,081 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:14:39,081 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_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec740d4c0b0b941516a7691cfe22f258e1a0e4fdd205bb4a0c04151c297a8c86 [2021-11-19 14:14:39,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:14:39,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:14:39,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:14:39,398 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:14:39,399 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:14:39,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c [2021-11-19 14:14:39,463 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/data/e4e619df4/fbc8c475d4b34f2c8ea04186cb503b7f/FLAG1648897d3 [2021-11-19 14:14:40,116 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:14:40,117 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c [2021-11-19 14:14:40,146 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/data/e4e619df4/fbc8c475d4b34f2c8ea04186cb503b7f/FLAG1648897d3 [2021-11-19 14:14:40,309 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/data/e4e619df4/fbc8c475d4b34f2c8ea04186cb503b7f [2021-11-19 14:14:40,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:14:40,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:14:40,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:40,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:14:40,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:14:40,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:40" (1/1) ... [2021-11-19 14:14:40,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ec020cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:40, skipping insertion in model container [2021-11-19 14:14:40,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:40" (1/1) ... [2021-11-19 14:14:40,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:14:40,413 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:40,837 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_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c[33356,33369] [2021-11-19 14:14:41,054 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:41,065 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-19 14:14:41,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2ccd6e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:41, skipping insertion in model container [2021-11-19 14:14:41,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:41,067 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 14:14:41,069 INFO L158 Benchmark]: Toolchain (without parser) took 754.66ms. Allocated memory was 86.0MB in the beginning and 130.0MB in the end (delta: 44.0MB). Free memory was 64.4MB in the beginning and 90.5MB in the end (delta: -26.2MB). Peak memory consumption was 17.1MB. Max. memory is 16.1GB. [2021-11-19 14:14:41,070 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 86.0MB. Free memory was 65.4MB in the beginning and 65.4MB in the end (delta: 38.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:14:41,071 INFO L158 Benchmark]: CACSL2BoogieTranslator took 752.23ms. Allocated memory was 86.0MB in the beginning and 130.0MB in the end (delta: 44.0MB). Free memory was 64.2MB in the beginning and 90.5MB in the end (delta: -26.3MB). Peak memory consumption was 17.1MB. Max. memory is 16.1GB. [2021-11-19 14:14:41,073 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 86.0MB. Free memory was 65.4MB in the beginning and 65.4MB in the end (delta: 38.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 752.23ms. Allocated memory was 86.0MB in the beginning and 130.0MB in the end (delta: 44.0MB). Free memory was 64.2MB in the beginning and 90.5MB in the end (delta: -26.3MB). Peak memory consumption was 17.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: 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_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/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_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/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_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/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 ec740d4c0b0b941516a7691cfe22f258e1a0e4fdd205bb4a0c04151c297a8c86 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:14:43,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:14:43,393 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:14:43,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:14:43,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:14:43,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:14:43,455 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:14:43,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:14:43,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:14:43,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:14:43,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:14:43,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:14:43,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:14:43,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:14:43,480 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:14:43,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:14:43,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:14:43,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:14:43,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:14:43,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:14:43,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:14:43,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:14:43,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:14:43,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:14:43,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:14:43,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:14:43,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:14:43,518 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:14:43,519 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:14:43,520 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:14:43,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:14:43,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:14:43,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:14:43,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:14:43,526 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:14:43,526 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:14:43,527 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:14:43,540 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:14:43,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:14:43,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:14:43,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:14:43,548 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 14:14:43,591 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:14:43,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:14:43,593 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:14:43,593 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:14:43,593 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:14:43,594 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:14:43,594 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:14:43,594 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:14:43,594 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:14:43,595 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:14:43,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:14:43,598 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:14:43,598 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:14:43,598 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:14:43,599 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:14:43,599 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:14:43,599 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:14:43,599 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:14:43,600 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 14:14:43,600 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 14:14:43,600 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:14:43,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:14:43,601 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:14:43,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:14:43,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:14:43,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 14:14:43,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:14:43,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:43,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:14:43,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:14:43,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:14:43,604 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 14:14:43,604 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 14:14:43,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:14:43,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:14:43,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:14:43,606 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_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec740d4c0b0b941516a7691cfe22f258e1a0e4fdd205bb4a0c04151c297a8c86 [2021-11-19 14:14:44,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:14:44,072 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:14:44,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:14:44,078 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:14:44,078 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:14:44,080 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c [2021-11-19 14:14:44,153 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/data/9f37a85c3/9fac1aaad8d44503ac06e5175bde7af7/FLAGba9cf3b18 [2021-11-19 14:14:44,944 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:14:44,944 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c [2021-11-19 14:14:44,974 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/data/9f37a85c3/9fac1aaad8d44503ac06e5175bde7af7/FLAGba9cf3b18 [2021-11-19 14:14:45,014 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/data/9f37a85c3/9fac1aaad8d44503ac06e5175bde7af7 [2021-11-19 14:14:45,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:14:45,018 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:14:45,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:45,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:14:45,023 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:14:45,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:45" (1/1) ... [2021-11-19 14:14:45,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5610db45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:45, skipping insertion in model container [2021-11-19 14:14:45,025 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:14:45" (1/1) ... [2021-11-19 14:14:45,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:14:45,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:45,664 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_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c[33356,33369] [2021-11-19 14:14:45,856 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:45,874 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 14:14:45,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:14:45,980 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_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c[33356,33369] [2021-11-19 14:14:46,062 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:46,067 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:14:46,117 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_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/sv-benchmarks/c/product-lines/elevator_spec3_product03.cil.c[33356,33369] [2021-11-19 14:14:46,159 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:14:46,195 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:14:46,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:46 WrapperNode [2021-11-19 14:14:46,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:14:46,197 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:46,198 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:14:46,198 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:14:46,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:46" (1/1) ... [2021-11-19 14:14:46,246 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:46" (1/1) ... [2021-11-19 14:14:46,340 INFO L137 Inliner]: procedures = 92, calls = 342, calls flagged for inlining = 21, calls inlined = 18, statements flattened = 979 [2021-11-19 14:14:46,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:14:46,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:14:46,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:14:46,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:14:46,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:46" (1/1) ... [2021-11-19 14:14:46,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:46" (1/1) ... [2021-11-19 14:14:46,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:46" (1/1) ... [2021-11-19 14:14:46,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:46" (1/1) ... [2021-11-19 14:14:46,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:46" (1/1) ... [2021-11-19 14:14:46,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:46" (1/1) ... [2021-11-19 14:14:46,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:46" (1/1) ... [2021-11-19 14:14:46,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:14:46,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:14:46,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:14:46,480 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:14:46,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:46" (1/1) ... [2021-11-19 14:14:46,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:14:46,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:14:46,512 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:14:46,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:14:46,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:14:46,563 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-19 14:14:46,563 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-19 14:14:46,563 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-19 14:14:46,563 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-19 14:14:46,563 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-19 14:14:46,563 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-19 14:14:46,563 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-19 14:14:46,563 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-19 14:14:46,564 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-19 14:14:46,564 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-19 14:14:46,564 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-19 14:14:46,564 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-19 14:14:46,564 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-19 14:14:46,564 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-19 14:14:46,564 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-19 14:14:46,564 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-19 14:14:46,564 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-19 14:14:46,565 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-19 14:14:46,565 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-19 14:14:46,565 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-19 14:14:46,565 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-19 14:14:46,565 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-19 14:14:46,565 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-19 14:14:46,566 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-19 14:14:46,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 14:14:46,566 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-19 14:14:46,566 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-19 14:14:46,566 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-19 14:14:46,567 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-19 14:14:46,567 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-19 14:14:46,567 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-19 14:14:46,567 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-19 14:14:46,567 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-19 14:14:46,568 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-19 14:14:46,568 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-19 14:14:46,568 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-19 14:14:46,568 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-19 14:14:46,568 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-19 14:14:46,568 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-19 14:14:46,569 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-19 14:14:46,569 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-19 14:14:46,569 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__base [2021-11-19 14:14:46,569 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__base [2021-11-19 14:14:46,569 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-19 14:14:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-19 14:14:46,570 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-19 14:14:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-19 14:14:46,570 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-19 14:14:46,570 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-19 14:14:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-19 14:14:46,571 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-19 14:14:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:14:46,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:14:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-19 14:14:46,572 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-19 14:14:46,813 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:14:46,816 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:14:47,981 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:14:48,006 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:14:48,007 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:14:48,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:48 BoogieIcfgContainer [2021-11-19 14:14:48,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:14:48,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:14:48,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:14:48,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:14:48,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:14:45" (1/3) ... [2021-11-19 14:14:48,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c4494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:48, skipping insertion in model container [2021-11-19 14:14:48,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:14:46" (2/3) ... [2021-11-19 14:14:48,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76c4494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:14:48, skipping insertion in model container [2021-11-19 14:14:48,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:14:48" (3/3) ... [2021-11-19 14:14:48,021 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product03.cil.c [2021-11-19 14:14:48,027 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:14:48,027 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 14:14:48,095 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:14:48,106 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:14:48,107 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 14:14:48,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 574 states, 440 states have (on average 1.6727272727272726) internal successors, (736), 458 states have internal predecessors, (736), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) [2021-11-19 14:14:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-19 14:14:48,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:48,191 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:48,192 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:48,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:48,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1064458506, now seen corresponding path program 1 times [2021-11-19 14:14:48,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:48,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820028082] [2021-11-19 14:14:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:48,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:48,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:48,213 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:48,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 14:14:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:48,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:48,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:14:49,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:14:49,804 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:49,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820028082] [2021-11-19 14:14:49,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820028082] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:49,805 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:49,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:14:49,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741616109] [2021-11-19 14:14:49,810 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:49,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:14:49,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:49,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:14:49,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:14:49,857 INFO L87 Difference]: Start difference. First operand has 574 states, 440 states have (on average 1.6727272727272726) internal successors, (736), 458 states have internal predecessors, (736), 106 states have call successors, (106), 26 states have call predecessors, (106), 26 states have return successors, (106), 103 states have call predecessors, (106), 106 states have call successors, (106) Second operand has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:14:50,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:50,334 INFO L93 Difference]: Finished difference Result 1151 states and 1917 transitions. [2021-11-19 14:14:50,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:14:50,343 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 113 [2021-11-19 14:14:50,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:50,381 INFO L225 Difference]: With dead ends: 1151 [2021-11-19 14:14:50,381 INFO L226 Difference]: Without dead ends: 585 [2021-11-19 14:14:50,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:14:50,425 INFO L933 BasicCegarLoop]: 933 mSDtfsCounter, 118 mSDsluCounter, 5500 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 6433 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:50,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 6433 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:50,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-11-19 14:14:50,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 577. [2021-11-19 14:14:50,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 443 states have (on average 1.6636568848758464) internal successors, (737), 461 states have internal predecessors, (737), 107 states have call successors, (107), 26 states have call predecessors, (107), 26 states have return successors, (106), 102 states have call predecessors, (106), 104 states have call successors, (106) [2021-11-19 14:14:50,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 950 transitions. [2021-11-19 14:14:50,612 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 950 transitions. Word has length 113 [2021-11-19 14:14:50,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:50,613 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 950 transitions. [2021-11-19 14:14:50,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 10.88888888888889) internal successors, (98), 9 states have internal predecessors, (98), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:14:50,614 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 950 transitions. [2021-11-19 14:14:50,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-19 14:14:50,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:50,627 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:50,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:50,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:50,841 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:50,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:50,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1244322680, now seen corresponding path program 1 times [2021-11-19 14:14:50,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:50,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394708906] [2021-11-19 14:14:50,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:50,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:50,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:50,847 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:50,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 14:14:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:51,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:51,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:14:51,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:14:51,938 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:51,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394708906] [2021-11-19 14:14:51,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394708906] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:51,939 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:51,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:14:51,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796057920] [2021-11-19 14:14:51,939 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:51,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:14:51,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:51,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:14:51,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:14:51,943 INFO L87 Difference]: Start difference. First operand 577 states and 950 transitions. Second operand has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:14:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:52,234 INFO L93 Difference]: Finished difference Result 1159 states and 1918 transitions. [2021-11-19 14:14:52,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:14:52,235 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 114 [2021-11-19 14:14:52,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:52,244 INFO L225 Difference]: With dead ends: 1159 [2021-11-19 14:14:52,244 INFO L226 Difference]: Without dead ends: 598 [2021-11-19 14:14:52,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:14:52,250 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 175 mSDsluCounter, 6396 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 7328 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:52,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 7328 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:52,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-11-19 14:14:52,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 590. [2021-11-19 14:14:52,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 453 states have (on average 1.6600441501103753) internal successors, (752), 473 states have internal predecessors, (752), 108 states have call successors, (108), 26 states have call predecessors, (108), 28 states have return successors, (109), 103 states have call predecessors, (109), 105 states have call successors, (109) [2021-11-19 14:14:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 969 transitions. [2021-11-19 14:14:52,318 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 969 transitions. Word has length 114 [2021-11-19 14:14:52,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:52,320 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 969 transitions. [2021-11-19 14:14:52,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:14:52,321 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 969 transitions. [2021-11-19 14:14:52,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 14:14:52,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:52,333 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:52,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:52,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:52,549 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:52,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:52,549 INFO L85 PathProgramCache]: Analyzing trace with hash 562107374, now seen corresponding path program 1 times [2021-11-19 14:14:52,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:52,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679074418] [2021-11-19 14:14:52,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:52,551 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:52,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:52,553 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:52,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 14:14:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:52,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:52,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:14:53,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:14:53,602 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:53,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679074418] [2021-11-19 14:14:53,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679074418] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:53,602 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:53,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:14:53,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312332871] [2021-11-19 14:14:53,603 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:53,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:14:53,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:53,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:14:53,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:14:53,606 INFO L87 Difference]: Start difference. First operand 590 states and 969 transitions. Second operand has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:14:53,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:53,905 INFO L93 Difference]: Finished difference Result 1185 states and 1957 transitions. [2021-11-19 14:14:53,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:14:53,907 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 115 [2021-11-19 14:14:53,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:53,916 INFO L225 Difference]: With dead ends: 1185 [2021-11-19 14:14:53,916 INFO L226 Difference]: Without dead ends: 611 [2021-11-19 14:14:53,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:14:53,925 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 103 mSDsluCounter, 7327 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 8259 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:53,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 8259 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:53,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-11-19 14:14:53,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 603. [2021-11-19 14:14:53,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 463 states have (on average 1.65658747300216) internal successors, (767), 485 states have internal predecessors, (767), 109 states have call successors, (109), 26 states have call predecessors, (109), 30 states have return successors, (112), 104 states have call predecessors, (112), 106 states have call successors, (112) [2021-11-19 14:14:53,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 988 transitions. [2021-11-19 14:14:53,983 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 988 transitions. Word has length 115 [2021-11-19 14:14:53,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:53,983 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 988 transitions. [2021-11-19 14:14:53,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:14:53,984 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 988 transitions. [2021-11-19 14:14:53,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:14:53,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:53,990 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:54,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:54,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:54,204 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:54,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:54,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1074768036, now seen corresponding path program 1 times [2021-11-19 14:14:54,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:54,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110731972] [2021-11-19 14:14:54,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:54,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:54,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:54,207 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:54,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 14:14:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:54,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:54,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:14:54,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:14:55,225 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:55,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110731972] [2021-11-19 14:14:55,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110731972] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:55,226 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:55,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-19 14:14:55,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115849953] [2021-11-19 14:14:55,226 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:55,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 14:14:55,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:55,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 14:14:55,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:14:55,228 INFO L87 Difference]: Start difference. First operand 603 states and 988 transitions. Second operand has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:14:55,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:55,472 INFO L93 Difference]: Finished difference Result 1207 states and 1990 transitions. [2021-11-19 14:14:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 14:14:55,474 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 116 [2021-11-19 14:14:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:55,480 INFO L225 Difference]: With dead ends: 1207 [2021-11-19 14:14:55,480 INFO L226 Difference]: Without dead ends: 620 [2021-11-19 14:14:55,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:14:55,486 INFO L933 BasicCegarLoop]: 932 mSDtfsCounter, 171 mSDsluCounter, 6396 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 7328 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:55,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 7328 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 14:14:55,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-11-19 14:14:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 616. [2021-11-19 14:14:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 473 states have (on average 1.653276955602537) internal successors, (782), 497 states have internal predecessors, (782), 110 states have call successors, (110), 26 states have call predecessors, (110), 32 states have return successors, (115), 105 states have call predecessors, (115), 107 states have call successors, (115) [2021-11-19 14:14:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1007 transitions. [2021-11-19 14:14:55,530 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1007 transitions. Word has length 116 [2021-11-19 14:14:55,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:55,531 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 1007 transitions. [2021-11-19 14:14:55,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:14:55,531 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1007 transitions. [2021-11-19 14:14:55,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:14:55,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:55,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:55,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:55,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:55,755 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:55,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:55,756 INFO L85 PathProgramCache]: Analyzing trace with hash -327107363, now seen corresponding path program 1 times [2021-11-19 14:14:55,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:55,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871847776] [2021-11-19 14:14:55,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:55,757 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:55,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:55,758 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:55,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 14:14:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:56,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 14:14:56,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:56,421 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:14:56,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:14:56,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:56,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871847776] [2021-11-19 14:14:56,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871847776] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:56,828 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:56,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-19 14:14:56,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953260483] [2021-11-19 14:14:56,829 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:56,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:14:56,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:56,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:14:56,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:14:56,831 INFO L87 Difference]: Start difference. First operand 616 states and 1007 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, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 14:14:56,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:56,983 INFO L93 Difference]: Finished difference Result 1227 states and 2020 transitions. [2021-11-19 14:14:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:14:56,985 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, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 116 [2021-11-19 14:14:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:56,991 INFO L225 Difference]: With dead ends: 1227 [2021-11-19 14:14:56,991 INFO L226 Difference]: Without dead ends: 627 [2021-11-19 14:14:56,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:14:56,997 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 242 mSDsluCounter, 3625 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 4546 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:56,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 4546 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:56,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-11-19 14:14:57,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 625. [2021-11-19 14:14:57,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 481 states have (on average 1.6528066528066527) internal successors, (795), 506 states have internal predecessors, (795), 110 states have call successors, (110), 26 states have call predecessors, (110), 33 states have return successors, (119), 105 states have call predecessors, (119), 107 states have call successors, (119) [2021-11-19 14:14:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1024 transitions. [2021-11-19 14:14:57,035 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1024 transitions. Word has length 116 [2021-11-19 14:14:57,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:57,036 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1024 transitions. [2021-11-19 14:14:57,036 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, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2021-11-19 14:14:57,037 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1024 transitions. [2021-11-19 14:14:57,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 14:14:57,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:57,042 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:57,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:57,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:57,264 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:57,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:57,264 INFO L85 PathProgramCache]: Analyzing trace with hash 840397664, now seen corresponding path program 1 times [2021-11-19 14:14:57,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:57,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631208867] [2021-11-19 14:14:57,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:57,265 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:57,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:57,266 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:57,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 14:14:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:57,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:14:57,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:14:57,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:14:58,207 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:58,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631208867] [2021-11-19 14:14:58,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631208867] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:58,208 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:58,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:14:58,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374145832] [2021-11-19 14:14:58,208 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:58,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:14:58,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:58,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:14:58,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:14:58,210 INFO L87 Difference]: Start difference. First operand 625 states and 1024 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:14:58,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:58,283 INFO L93 Difference]: Finished difference Result 1226 states and 2013 transitions. [2021-11-19 14:14:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:14:58,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 117 [2021-11-19 14:14:58,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:58,291 INFO L225 Difference]: With dead ends: 1226 [2021-11-19 14:14:58,291 INFO L226 Difference]: Without dead ends: 535 [2021-11-19 14:14:58,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:14:58,300 INFO L933 BasicCegarLoop]: 919 mSDtfsCounter, 22 mSDsluCounter, 2746 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3665 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:58,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 3665 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:14:58,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-19 14:14:58,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2021-11-19 14:14:58,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 404 states have (on average 1.6287128712871286) internal successors, (658), 420 states have internal predecessors, (658), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:14:58,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 867 transitions. [2021-11-19 14:14:58,330 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 867 transitions. Word has length 117 [2021-11-19 14:14:58,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:14:58,331 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 867 transitions. [2021-11-19 14:14:58,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:14:58,331 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 867 transitions. [2021-11-19 14:14:58,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 14:14:58,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:14:58,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:14:58,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 14:14:58,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:14:58,554 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:14:58,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:14:58,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2053631698, now seen corresponding path program 1 times [2021-11-19 14:14:58,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:14:58,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309133941] [2021-11-19 14:14:58,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:14:58,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:14:58,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:14:58,557 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:14:58,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 14:14:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:14:58,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:14:58,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:14:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:14:59,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:14:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:14:59,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:14:59,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309133941] [2021-11-19 14:14:59,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309133941] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:14:59,776 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:14:59,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:14:59,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431604092] [2021-11-19 14:14:59,776 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:14:59,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:14:59,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:14:59,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:14:59,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:14:59,778 INFO L87 Difference]: Start difference. First operand 535 states and 867 transitions. Second operand has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:14:59,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:14:59,975 INFO L93 Difference]: Finished difference Result 1057 states and 1722 transitions. [2021-11-19 14:14:59,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:14:59,976 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 117 [2021-11-19 14:14:59,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:14:59,981 INFO L225 Difference]: With dead ends: 1057 [2021-11-19 14:14:59,981 INFO L226 Difference]: Without dead ends: 535 [2021-11-19 14:14:59,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-11-19 14:14:59,986 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 56 mSDsluCounter, 6750 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 7599 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:14:59,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 7599 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:14:59,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-19 14:15:00,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2021-11-19 14:15:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 404 states have (on average 1.6262376237623761) internal successors, (657), 420 states have internal predecessors, (657), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:15:00,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 866 transitions. [2021-11-19 14:15:00,016 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 866 transitions. Word has length 117 [2021-11-19 14:15:00,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:00,017 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 866 transitions. [2021-11-19 14:15:00,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.909090909090908) internal successors, (109), 11 states have internal predecessors, (109), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:15:00,017 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 866 transitions. [2021-11-19 14:15:00,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 14:15:00,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:00,021 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:00,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:00,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:00,239 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:00,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:00,240 INFO L85 PathProgramCache]: Analyzing trace with hash 466323196, now seen corresponding path program 1 times [2021-11-19 14:15:00,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:00,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [929301093] [2021-11-19 14:15:00,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:00,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:00,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:00,242 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:00,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 14:15:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:00,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:15:00,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:15:00,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:15:01,286 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:01,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [929301093] [2021-11-19 14:15:01,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [929301093] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:01,287 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:01,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:15:01,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305174771] [2021-11-19 14:15:01,287 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:01,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:15:01,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:01,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:15:01,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:15:01,289 INFO L87 Difference]: Start difference. First operand 535 states and 866 transitions. Second operand has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:15:01,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:01,466 INFO L93 Difference]: Finished difference Result 1057 states and 1720 transitions. [2021-11-19 14:15:01,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:15:01,468 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 118 [2021-11-19 14:15:01,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:01,473 INFO L225 Difference]: With dead ends: 1057 [2021-11-19 14:15:01,473 INFO L226 Difference]: Without dead ends: 535 [2021-11-19 14:15:01,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 223 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 14:15:01,478 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 63 mSDsluCounter, 6762 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 7611 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:01,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 7611 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:15:01,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-19 14:15:01,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2021-11-19 14:15:01,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 404 states have (on average 1.6237623762376239) internal successors, (656), 420 states have internal predecessors, (656), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:15:01,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 865 transitions. [2021-11-19 14:15:01,509 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 865 transitions. Word has length 118 [2021-11-19 14:15:01,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:01,509 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 865 transitions. [2021-11-19 14:15:01,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.090909090909092) internal successors, (111), 11 states have internal predecessors, (111), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:15:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 865 transitions. [2021-11-19 14:15:01,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 14:15:01,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:01,514 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:01,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:01,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:01,733 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:01,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:01,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1048123287, now seen corresponding path program 1 times [2021-11-19 14:15:01,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:01,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519497426] [2021-11-19 14:15:01,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:01,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:01,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:01,735 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:01,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 14:15:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:02,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:15:02,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:15:02,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:15:02,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:02,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519497426] [2021-11-19 14:15:02,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519497426] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:02,781 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:02,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:15:02,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511677589] [2021-11-19 14:15:02,781 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:02,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:15:02,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:02,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:15:02,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:15:02,783 INFO L87 Difference]: Start difference. First operand 535 states and 865 transitions. Second operand has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:15:02,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:02,969 INFO L93 Difference]: Finished difference Result 1057 states and 1718 transitions. [2021-11-19 14:15:02,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:15:02,971 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 119 [2021-11-19 14:15:02,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:02,976 INFO L225 Difference]: With dead ends: 1057 [2021-11-19 14:15:02,976 INFO L226 Difference]: Without dead ends: 535 [2021-11-19 14:15:02,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 225 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 14:15:02,981 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 35 mSDsluCounter, 7594 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 8443 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:02,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 8443 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:15:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-19 14:15:03,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2021-11-19 14:15:03,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 404 states have (on average 1.6212871287128714) internal successors, (655), 420 states have internal predecessors, (655), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:15:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 864 transitions. [2021-11-19 14:15:03,007 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 864 transitions. Word has length 119 [2021-11-19 14:15:03,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:03,008 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 864 transitions. [2021-11-19 14:15:03,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:15:03,008 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 864 transitions. [2021-11-19 14:15:03,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-19 14:15:03,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:03,012 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:03,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:03,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:03,229 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:03,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:03,230 INFO L85 PathProgramCache]: Analyzing trace with hash 152813025, now seen corresponding path program 1 times [2021-11-19 14:15:03,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:03,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632495885] [2021-11-19 14:15:03,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:03,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:03,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:03,231 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:03,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 14:15:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:03,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:15:03,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:15:03,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:15:04,257 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:04,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632495885] [2021-11-19 14:15:04,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632495885] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:04,258 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:04,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-19 14:15:04,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884624759] [2021-11-19 14:15:04,259 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:04,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 14:15:04,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:04,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 14:15:04,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-19 14:15:04,261 INFO L87 Difference]: Start difference. First operand 535 states and 864 transitions. Second operand has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:15:04,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:04,419 INFO L93 Difference]: Finished difference Result 1057 states and 1716 transitions. [2021-11-19 14:15:04,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:15:04,421 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 120 [2021-11-19 14:15:04,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:04,426 INFO L225 Difference]: With dead ends: 1057 [2021-11-19 14:15:04,426 INFO L226 Difference]: Without dead ends: 535 [2021-11-19 14:15:04,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 227 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 14:15:04,452 INFO L933 BasicCegarLoop]: 849 mSDtfsCounter, 41 mSDsluCounter, 7595 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 8444 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:04,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 8444 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:15:04,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-19 14:15:04,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 535. [2021-11-19 14:15:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 404 states have (on average 1.618811881188119) internal successors, (654), 420 states have internal predecessors, (654), 106 states have call successors, (106), 26 states have call predecessors, (106), 24 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-19 14:15:04,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 863 transitions. [2021-11-19 14:15:04,476 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 863 transitions. Word has length 120 [2021-11-19 14:15:04,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:04,476 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 863 transitions. [2021-11-19 14:15:04,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 states have internal predecessors, (115), 4 states have call successors, (26), 2 states have call predecessors, (26), 5 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-19 14:15:04,477 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 863 transitions. [2021-11-19 14:15:04,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 14:15:04,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:04,481 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:04,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:04,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:04,699 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:04,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:04,699 INFO L85 PathProgramCache]: Analyzing trace with hash 711722076, now seen corresponding path program 1 times [2021-11-19 14:15:04,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:04,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360490035] [2021-11-19 14:15:04,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:04,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:04,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:04,701 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:04,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 14:15:04,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:05,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:15:05,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:15:05,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:15:05,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:05,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360490035] [2021-11-19 14:15:05,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360490035] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:05,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:15:05,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-19 14:15:05,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237870773] [2021-11-19 14:15:05,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:05,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:15:05,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:05,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:15:05,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:15:05,615 INFO L87 Difference]: Start difference. First operand 535 states and 863 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 14:15:06,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:06,599 INFO L93 Difference]: Finished difference Result 1572 states and 2573 transitions. [2021-11-19 14:15:06,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:15:06,601 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 121 [2021-11-19 14:15:06,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:06,611 INFO L225 Difference]: With dead ends: 1572 [2021-11-19 14:15:06,611 INFO L226 Difference]: Without dead ends: 1055 [2021-11-19 14:15:06,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:15:06,618 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 845 mSDsluCounter, 3408 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 4389 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:06,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 4389 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:15:06,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-11-19 14:15:06,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1046. [2021-11-19 14:15:06,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 793 states have (on average 1.6216897856242118) internal successors, (1286), 824 states have internal predecessors, (1286), 204 states have call successors, (204), 48 states have call predecessors, (204), 48 states have return successors, (215), 199 states have call predecessors, (215), 200 states have call successors, (215) [2021-11-19 14:15:06,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1705 transitions. [2021-11-19 14:15:06,678 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1705 transitions. Word has length 121 [2021-11-19 14:15:06,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:06,679 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1705 transitions. [2021-11-19 14:15:06,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-19 14:15:06,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1705 transitions. [2021-11-19 14:15:06,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 14:15:06,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:06,684 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:06,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:06,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:06,901 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:06,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:06,901 INFO L85 PathProgramCache]: Analyzing trace with hash 334421852, now seen corresponding path program 1 times [2021-11-19 14:15:06,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:06,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965977033] [2021-11-19 14:15:06,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:06,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:06,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:06,903 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:06,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 14:15:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:07,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:15:07,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:07,565 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 14:15:07,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:15:07,918 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:07,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965977033] [2021-11-19 14:15:07,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965977033] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:07,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:15:07,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-19 14:15:07,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667895177] [2021-11-19 14:15:07,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:07,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:15:07,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:07,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:15:07,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:15:07,924 INFO L87 Difference]: Start difference. First operand 1046 states and 1705 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:15:08,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:08,912 INFO L93 Difference]: Finished difference Result 2560 states and 4190 transitions. [2021-11-19 14:15:08,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 14:15:08,914 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 121 [2021-11-19 14:15:08,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:08,928 INFO L225 Difference]: With dead ends: 2560 [2021-11-19 14:15:08,929 INFO L226 Difference]: Without dead ends: 1532 [2021-11-19 14:15:08,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:15:08,940 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 724 mSDsluCounter, 3115 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 4040 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:08,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 4040 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:15:08,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-11-19 14:15:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1522. [2021-11-19 14:15:09,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1153 states have (on average 1.5949696444058976) internal successors, (1839), 1198 states have internal predecessors, (1839), 296 states have call successors, (296), 72 states have call predecessors, (296), 72 states have return successors, (318), 289 states have call predecessors, (318), 291 states have call successors, (318) [2021-11-19 14:15:09,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 2453 transitions. [2021-11-19 14:15:09,050 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 2453 transitions. Word has length 121 [2021-11-19 14:15:09,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:09,051 INFO L470 AbstractCegarLoop]: Abstraction has 1522 states and 2453 transitions. [2021-11-19 14:15:09,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 4 states have call successors, (16), 3 states have call predecessors, (16), 4 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-19 14:15:09,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 2453 transitions. [2021-11-19 14:15:09,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 14:15:09,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:09,057 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:09,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:09,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:09,272 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:09,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:09,272 INFO L85 PathProgramCache]: Analyzing trace with hash 172913293, now seen corresponding path program 1 times [2021-11-19 14:15:09,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:09,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485366101] [2021-11-19 14:15:09,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:09,273 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:09,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:09,275 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:09,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 14:15:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:09,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 856 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:15:09,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:15:09,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:10,210 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:15:10,211 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:10,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485366101] [2021-11-19 14:15:10,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485366101] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:10,211 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:10,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:15:10,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317543755] [2021-11-19 14:15:10,211 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:10,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:15:10,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:10,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:15:10,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:15:10,212 INFO L87 Difference]: Start difference. First operand 1522 states and 2453 transitions. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-19 14:15:11,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:11,853 INFO L93 Difference]: Finished difference Result 5445 states and 9197 transitions. [2021-11-19 14:15:11,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:15:11,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 126 [2021-11-19 14:15:11,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:11,938 INFO L225 Difference]: With dead ends: 5445 [2021-11-19 14:15:11,938 INFO L226 Difference]: Without dead ends: 3941 [2021-11-19 14:15:11,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:15:11,954 INFO L933 BasicCegarLoop]: 1311 mSDtfsCounter, 1140 mSDsluCounter, 4414 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1221 SdHoareTripleChecker+Valid, 5725 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:11,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1221 Valid, 5725 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 14:15:11,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3941 states. [2021-11-19 14:15:12,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3941 to 2990. [2021-11-19 14:15:12,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2990 states, 2269 states have (on average 1.5905685323931247) internal successors, (3609), 2360 states have internal predecessors, (3609), 572 states have call successors, (572), 141 states have call predecessors, (572), 148 states have return successors, (715), 564 states have call predecessors, (715), 564 states have call successors, (715) [2021-11-19 14:15:12,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 4896 transitions. [2021-11-19 14:15:12,165 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 4896 transitions. Word has length 126 [2021-11-19 14:15:12,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:12,166 INFO L470 AbstractCegarLoop]: Abstraction has 2990 states and 4896 transitions. [2021-11-19 14:15:12,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 6 states have internal predecessors, (128), 3 states have call successors, (33), 3 states have call predecessors, (33), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-19 14:15:12,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 4896 transitions. [2021-11-19 14:15:12,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 14:15:12,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:12,170 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:12,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:12,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:12,388 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:12,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:12,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1713042310, now seen corresponding path program 1 times [2021-11-19 14:15:12,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:12,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867174223] [2021-11-19 14:15:12,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:12,389 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:12,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:12,390 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:12,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 14:15:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:12,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:15:12,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:15:12,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:15:13,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:13,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867174223] [2021-11-19 14:15:13,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867174223] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:13,193 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:13,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:15:13,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677082976] [2021-11-19 14:15:13,194 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:13,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:15:13,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:13,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:15:13,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:15:13,196 INFO L87 Difference]: Start difference. First operand 2990 states and 4896 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:15:13,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:13,392 INFO L93 Difference]: Finished difference Result 5980 states and 9920 transitions. [2021-11-19 14:15:13,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:15:13,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 127 [2021-11-19 14:15:13,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:13,421 INFO L225 Difference]: With dead ends: 5980 [2021-11-19 14:15:13,421 INFO L226 Difference]: Without dead ends: 3008 [2021-11-19 14:15:13,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:15:13,478 INFO L933 BasicCegarLoop]: 843 mSDtfsCounter, 23 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2502 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:13,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 2502 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:15:13,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-11-19 14:15:13,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3002. [2021-11-19 14:15:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 2278 states have (on average 1.586918349429324) internal successors, (3615), 2369 states have internal predecessors, (3615), 572 states have call successors, (572), 147 states have call predecessors, (572), 151 states have return successors, (699), 561 states have call predecessors, (699), 564 states have call successors, (699) [2021-11-19 14:15:13,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 4886 transitions. [2021-11-19 14:15:13,660 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 4886 transitions. Word has length 127 [2021-11-19 14:15:13,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:13,660 INFO L470 AbstractCegarLoop]: Abstraction has 3002 states and 4886 transitions. [2021-11-19 14:15:13,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-19 14:15:13,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 4886 transitions. [2021-11-19 14:15:13,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 14:15:13,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:13,665 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:13,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:13,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:13,880 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:13,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:13,880 INFO L85 PathProgramCache]: Analyzing trace with hash -123547852, now seen corresponding path program 1 times [2021-11-19 14:15:13,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:13,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012343854] [2021-11-19 14:15:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:13,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:13,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:13,881 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:13,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 14:15:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:14,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:15:14,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 14:15:14,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 14:15:14,844 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:14,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012343854] [2021-11-19 14:15:14,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012343854] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:14,847 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:14,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:15:14,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292847969] [2021-11-19 14:15:14,848 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:14,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:15:14,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:14,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:15:14,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:15:14,849 INFO L87 Difference]: Start difference. First operand 3002 states and 4886 transitions. Second operand has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-19 14:15:16,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:16,350 INFO L93 Difference]: Finished difference Result 10814 states and 18701 transitions. [2021-11-19 14:15:16,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:15:16,362 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) Word has length 135 [2021-11-19 14:15:16,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:16,445 INFO L225 Difference]: With dead ends: 10814 [2021-11-19 14:15:16,445 INFO L226 Difference]: Without dead ends: 7830 [2021-11-19 14:15:16,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:15:16,470 INFO L933 BasicCegarLoop]: 1295 mSDtfsCounter, 1117 mSDsluCounter, 4385 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 5680 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:16,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1187 Valid, 5680 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:15:16,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7830 states. [2021-11-19 14:15:16,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7830 to 5980. [2021-11-19 14:15:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5980 states, 4540 states have (on average 1.5821585903083701) internal successors, (7183), 4726 states have internal predecessors, (7183), 1127 states have call successors, (1127), 291 states have call predecessors, (1127), 312 states have return successors, (1626), 1114 states have call predecessors, (1626), 1113 states have call successors, (1626) [2021-11-19 14:15:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5980 states to 5980 states and 9936 transitions. [2021-11-19 14:15:16,929 INFO L78 Accepts]: Start accepts. Automaton has 5980 states and 9936 transitions. Word has length 135 [2021-11-19 14:15:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:16,929 INFO L470 AbstractCegarLoop]: Abstraction has 5980 states and 9936 transitions. [2021-11-19 14:15:16,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.571428571428573) internal successors, (137), 6 states have internal predecessors, (137), 3 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (33), 4 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-19 14:15:16,930 INFO L276 IsEmpty]: Start isEmpty. Operand 5980 states and 9936 transitions. [2021-11-19 14:15:16,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 14:15:16,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:16,933 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:16,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:17,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:17,152 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:17,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:17,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1982290425, now seen corresponding path program 1 times [2021-11-19 14:15:17,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:17,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31278054] [2021-11-19 14:15:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:17,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:17,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:17,155 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:17,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 14:15:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:17,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:15:17,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-19 14:15:17,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-19 14:15:17,995 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:17,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31278054] [2021-11-19 14:15:17,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31278054] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:17,995 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:17,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:15:17,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193100669] [2021-11-19 14:15:17,996 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:17,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:15:17,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:17,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:15:17,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:15:17,997 INFO L87 Difference]: Start difference. First operand 5980 states and 9936 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-19 14:15:18,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:18,449 INFO L93 Difference]: Finished difference Result 12014 states and 20295 transitions. [2021-11-19 14:15:18,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:15:18,449 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 136 [2021-11-19 14:15:18,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:18,495 INFO L225 Difference]: With dead ends: 12014 [2021-11-19 14:15:18,496 INFO L226 Difference]: Without dead ends: 6052 [2021-11-19 14:15:18,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:15:18,542 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 34 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:18,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1671 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:15:18,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6052 states. [2021-11-19 14:15:18,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6052 to 6040. [2021-11-19 14:15:18,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6040 states, 4594 states have (on average 1.5766216804527644) internal successors, (7243), 4768 states have internal predecessors, (7243), 1127 states have call successors, (1127), 315 states have call predecessors, (1127), 318 states have return successors, (1602), 1108 states have call predecessors, (1602), 1113 states have call successors, (1602) [2021-11-19 14:15:18,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6040 states to 6040 states and 9972 transitions. [2021-11-19 14:15:18,989 INFO L78 Accepts]: Start accepts. Automaton has 6040 states and 9972 transitions. Word has length 136 [2021-11-19 14:15:18,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:18,990 INFO L470 AbstractCegarLoop]: Abstraction has 6040 states and 9972 transitions. [2021-11-19 14:15:18,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-19 14:15:18,991 INFO L276 IsEmpty]: Start isEmpty. Operand 6040 states and 9972 transitions. [2021-11-19 14:15:18,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-19 14:15:18,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:18,995 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:19,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:19,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:19,212 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:19,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:19,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1381086620, now seen corresponding path program 1 times [2021-11-19 14:15:19,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:19,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014721080] [2021-11-19 14:15:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:19,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:19,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:19,214 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:19,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 14:15:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:19,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:15:19,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:19,919 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 14:15:19,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:15:20,227 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:20,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014721080] [2021-11-19 14:15:20,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014721080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:20,227 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:20,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:15:20,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126998725] [2021-11-19 14:15:20,227 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:20,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:15:20,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:20,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:15:20,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:15:20,229 INFO L87 Difference]: Start difference. First operand 6040 states and 9972 transitions. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-19 14:15:22,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:22,292 INFO L93 Difference]: Finished difference Result 21742 states and 38948 transitions. [2021-11-19 14:15:22,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:15:22,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) Word has length 145 [2021-11-19 14:15:22,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:22,504 INFO L225 Difference]: With dead ends: 21742 [2021-11-19 14:15:22,504 INFO L226 Difference]: Without dead ends: 15720 [2021-11-19 14:15:22,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:15:22,563 INFO L933 BasicCegarLoop]: 1292 mSDtfsCounter, 1095 mSDsluCounter, 5129 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 6421 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:22,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1161 Valid, 6421 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:15:22,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15720 states. [2021-11-19 14:15:23,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15720 to 12104. [2021-11-19 14:15:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 9205 states have (on average 1.5717544812601847) internal successors, (14468), 9563 states have internal predecessors, (14468), 2240 states have call successors, (2240), 627 states have call predecessors, (2240), 658 states have return successors, (3841), 2217 states have call predecessors, (3841), 2214 states have call successors, (3841) [2021-11-19 14:15:23,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 20549 transitions. [2021-11-19 14:15:23,541 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 20549 transitions. Word has length 145 [2021-11-19 14:15:23,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:23,541 INFO L470 AbstractCegarLoop]: Abstraction has 12104 states and 20549 transitions. [2021-11-19 14:15:23,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 6 states have internal predecessors, (144), 3 states have call successors, (37), 3 states have call predecessors, (37), 5 states have return successors, (35), 4 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-19 14:15:23,542 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 20549 transitions. [2021-11-19 14:15:23,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-19 14:15:23,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:23,546 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:23,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:23,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:23,760 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:23,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:23,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1111291105, now seen corresponding path program 1 times [2021-11-19 14:15:23,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:23,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102349726] [2021-11-19 14:15:23,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:23,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:23,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:23,763 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:23,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 14:15:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:24,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:15:24,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:15:24,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:15:24,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:24,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102349726] [2021-11-19 14:15:24,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102349726] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:24,670 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:24,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 14:15:24,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59105599] [2021-11-19 14:15:24,671 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:24,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:15:24,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:24,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:15:24,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 14:15:24,672 INFO L87 Difference]: Start difference. First operand 12104 states and 20549 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-19 14:15:25,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:25,346 INFO L93 Difference]: Finished difference Result 24334 states and 42325 transitions. [2021-11-19 14:15:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 14:15:25,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 146 [2021-11-19 14:15:25,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:25,565 INFO L225 Difference]: With dead ends: 24334 [2021-11-19 14:15:25,565 INFO L226 Difference]: Without dead ends: 12248 [2021-11-19 14:15:25,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:15:25,668 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 21 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:25,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 2500 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:15:25,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12248 states. [2021-11-19 14:15:26,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12248 to 12224. [2021-11-19 14:15:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12224 states, 9313 states have (on average 1.5664125416085042) internal successors, (14588), 9671 states have internal predecessors, (14588), 2240 states have call successors, (2240), 651 states have call predecessors, (2240), 670 states have return successors, (3809), 2205 states have call predecessors, (3809), 2214 states have call successors, (3809) [2021-11-19 14:15:26,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12224 states to 12224 states and 20637 transitions. [2021-11-19 14:15:26,529 INFO L78 Accepts]: Start accepts. Automaton has 12224 states and 20637 transitions. Word has length 146 [2021-11-19 14:15:26,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:26,530 INFO L470 AbstractCegarLoop]: Abstraction has 12224 states and 20637 transitions. [2021-11-19 14:15:26,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-19 14:15:26,530 INFO L276 IsEmpty]: Start isEmpty. Operand 12224 states and 20637 transitions. [2021-11-19 14:15:26,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-19 14:15:26,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:26,535 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:15:26,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:26,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:26,754 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:26,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:26,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1921114243, now seen corresponding path program 1 times [2021-11-19 14:15:26,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:26,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552508569] [2021-11-19 14:15:26,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:26,758 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:26,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:26,759 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:26,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 14:15:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:27,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 14:15:27,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:15:27,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:15:27,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:27,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552508569] [2021-11-19 14:15:27,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552508569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 14:15:27,850 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:15:27,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-19 14:15:27,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021582059] [2021-11-19 14:15:27,851 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:27,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:15:27,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:27,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:15:27,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:15:27,858 INFO L87 Difference]: Start difference. First operand 12224 states and 20637 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-19 14:15:30,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:30,821 INFO L93 Difference]: Finished difference Result 43846 states and 82826 transitions. [2021-11-19 14:15:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:15:30,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) Word has length 156 [2021-11-19 14:15:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:31,051 INFO L225 Difference]: With dead ends: 43846 [2021-11-19 14:15:31,051 INFO L226 Difference]: Without dead ends: 31640 [2021-11-19 14:15:31,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:15:31,177 INFO L933 BasicCegarLoop]: 1126 mSDtfsCounter, 1154 mSDsluCounter, 3989 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 5115 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:31,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1216 Valid, 5115 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 14:15:31,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31640 states. [2021-11-19 14:15:33,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31640 to 24556. [2021-11-19 14:15:33,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24556 states, 18700 states have (on average 1.5615508021390374) internal successors, (29201), 19438 states have internal predecessors, (29201), 4469 states have call successors, (4469), 1299 states have call predecessors, (4469), 1386 states have return successors, (9440), 4426 states have call predecessors, (9440), 4419 states have call successors, (9440) [2021-11-19 14:15:33,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24556 states to 24556 states and 43110 transitions. [2021-11-19 14:15:33,599 INFO L78 Accepts]: Start accepts. Automaton has 24556 states and 43110 transitions. Word has length 156 [2021-11-19 14:15:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:33,600 INFO L470 AbstractCegarLoop]: Abstraction has 24556 states and 43110 transitions. [2021-11-19 14:15:33,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (39), 3 states have call predecessors, (39), 5 states have return successors, (37), 4 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-19 14:15:33,600 INFO L276 IsEmpty]: Start isEmpty. Operand 24556 states and 43110 transitions. [2021-11-19 14:15:33,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-19 14:15:33,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:33,604 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:33,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:33,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:33,823 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:33,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:33,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1980949670, now seen corresponding path program 1 times [2021-11-19 14:15:33,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:33,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519613505] [2021-11-19 14:15:33,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:33,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:33,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:33,826 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:33,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 14:15:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:34,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:34,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:15:34,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:15:35,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:35,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519613505] [2021-11-19 14:15:35,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519613505] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:35,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:15:35,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:15:35,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580615893] [2021-11-19 14:15:35,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:35,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:15:35,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:35,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:15:35,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:15:35,160 INFO L87 Difference]: Start difference. First operand 24556 states and 43110 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:15:37,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:37,683 INFO L93 Difference]: Finished difference Result 49286 states and 90804 transitions. [2021-11-19 14:15:37,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:15:37,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 157 [2021-11-19 14:15:37,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:37,868 INFO L225 Difference]: With dead ends: 49286 [2021-11-19 14:15:37,868 INFO L226 Difference]: Without dead ends: 24748 [2021-11-19 14:15:38,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 305 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 14:15:38,380 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 755 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 2110 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:38,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 2110 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:15:38,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24748 states. [2021-11-19 14:15:39,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24748 to 24748. [2021-11-19 14:15:39,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24748 states, 18844 states have (on average 1.5572596051793675) internal successors, (29345), 19582 states have internal predecessors, (29345), 4469 states have call successors, (4469), 1347 states have call predecessors, (4469), 1434 states have return successors, (9488), 4426 states have call predecessors, (9488), 4419 states have call successors, (9488) [2021-11-19 14:15:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24748 states to 24748 states and 43302 transitions. [2021-11-19 14:15:40,580 INFO L78 Accepts]: Start accepts. Automaton has 24748 states and 43302 transitions. Word has length 157 [2021-11-19 14:15:40,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:40,581 INFO L470 AbstractCegarLoop]: Abstraction has 24748 states and 43302 transitions. [2021-11-19 14:15:40,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:15:40,581 INFO L276 IsEmpty]: Start isEmpty. Operand 24748 states and 43302 transitions. [2021-11-19 14:15:40,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-19 14:15:40,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:40,584 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:40,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:40,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:40,804 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:40,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:40,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1646782312, now seen corresponding path program 1 times [2021-11-19 14:15:40,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:40,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255406199] [2021-11-19 14:15:40,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:40,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:40,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:40,805 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:40,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 14:15:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:41,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:41,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:15:41,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:15:41,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:41,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255406199] [2021-11-19 14:15:41,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255406199] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:41,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:15:41,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:15:41,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048688101] [2021-11-19 14:15:41,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:41,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:15:41,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:41,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:15:41,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:15:41,906 INFO L87 Difference]: Start difference. First operand 24748 states and 43302 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:15:44,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:44,111 INFO L93 Difference]: Finished difference Result 49718 states and 91156 transitions. [2021-11-19 14:15:44,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:15:44,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 159 [2021-11-19 14:15:44,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:44,468 INFO L225 Difference]: With dead ends: 49718 [2021-11-19 14:15:44,468 INFO L226 Difference]: Without dead ends: 24988 [2021-11-19 14:15:44,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 309 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 14:15:44,773 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 765 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 2111 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:44,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 2111 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 14:15:44,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24988 states. [2021-11-19 14:15:46,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24988 to 24988. [2021-11-19 14:15:46,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24988 states, 19036 states have (on average 1.5516389997898719) internal successors, (29537), 19774 states have internal predecessors, (29537), 4469 states have call successors, (4469), 1395 states have call predecessors, (4469), 1482 states have return successors, (9536), 4426 states have call predecessors, (9536), 4419 states have call successors, (9536) [2021-11-19 14:15:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24988 states to 24988 states and 43542 transitions. [2021-11-19 14:15:46,530 INFO L78 Accepts]: Start accepts. Automaton has 24988 states and 43542 transitions. Word has length 159 [2021-11-19 14:15:46,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:46,531 INFO L470 AbstractCegarLoop]: Abstraction has 24988 states and 43542 transitions. [2021-11-19 14:15:46,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 4 states have internal predecessors, (104), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:15:46,531 INFO L276 IsEmpty]: Start isEmpty. Operand 24988 states and 43542 transitions. [2021-11-19 14:15:46,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-19 14:15:46,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:46,534 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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 14:15:46,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-19 14:15:46,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:46,752 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:46,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:46,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1148501606, now seen corresponding path program 1 times [2021-11-19 14:15:46,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:46,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273339954] [2021-11-19 14:15:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:46,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:46,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:46,754 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:46,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 14:15:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:47,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:47,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:15:47,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:15:47,821 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:47,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273339954] [2021-11-19 14:15:47,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273339954] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:47,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:15:47,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:15:47,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157728373] [2021-11-19 14:15:47,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:47,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:15:47,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:47,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:15:47,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:15:47,822 INFO L87 Difference]: Start difference. First operand 24988 states and 43542 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:15:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:50,537 INFO L93 Difference]: Finished difference Result 50246 states and 91628 transitions. [2021-11-19 14:15:50,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:15:50,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 161 [2021-11-19 14:15:50,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:50,764 INFO L225 Difference]: With dead ends: 50246 [2021-11-19 14:15:50,764 INFO L226 Difference]: Without dead ends: 25276 [2021-11-19 14:15:51,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:15:51,157 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 756 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 2111 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:51,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 2111 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:15:51,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25276 states. [2021-11-19 14:15:52,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25276 to 25276. [2021-11-19 14:15:52,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25276 states, 19276 states have (on average 1.5447706993152106) internal successors, (29777), 20014 states have internal predecessors, (29777), 4469 states have call successors, (4469), 1443 states have call predecessors, (4469), 1530 states have return successors, (9584), 4426 states have call predecessors, (9584), 4419 states have call successors, (9584) [2021-11-19 14:15:52,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25276 states to 25276 states and 43830 transitions. [2021-11-19 14:15:52,834 INFO L78 Accepts]: Start accepts. Automaton has 25276 states and 43830 transitions. Word has length 161 [2021-11-19 14:15:52,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:52,837 INFO L470 AbstractCegarLoop]: Abstraction has 25276 states and 43830 transitions. [2021-11-19 14:15:52,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:15:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 25276 states and 43830 transitions. [2021-11-19 14:15:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-19 14:15:52,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:52,840 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:52,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:53,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:53,047 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:53,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:53,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1099335856, now seen corresponding path program 1 times [2021-11-19 14:15:53,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:53,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72843612] [2021-11-19 14:15:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:53,048 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:53,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:53,048 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:53,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-19 14:15:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:53,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:15:53,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:15:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:15:53,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:15:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-19 14:15:54,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:15:54,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72843612] [2021-11-19 14:15:54,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72843612] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:15:54,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:15:54,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-19 14:15:54,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148157620] [2021-11-19 14:15:54,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:15:54,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:15:54,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:15:54,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:15:54,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-19 14:15:54,034 INFO L87 Difference]: Start difference. First operand 25276 states and 43830 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:15:56,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:15:56,709 INFO L93 Difference]: Finished difference Result 50870 states and 92208 transitions. [2021-11-19 14:15:56,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 14:15:56,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 163 [2021-11-19 14:15:56,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:15:56,934 INFO L225 Difference]: With dead ends: 50870 [2021-11-19 14:15:56,935 INFO L226 Difference]: Without dead ends: 25612 [2021-11-19 14:15:57,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-19 14:15:57,363 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 757 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 2111 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:15:57,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 2111 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:15:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25612 states. [2021-11-19 14:15:58,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25612 to 25612. [2021-11-19 14:15:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25612 states, 19564 states have (on average 1.5367511756287058) internal successors, (30065), 20302 states have internal predecessors, (30065), 4469 states have call successors, (4469), 1491 states have call predecessors, (4469), 1578 states have return successors, (9632), 4426 states have call predecessors, (9632), 4419 states have call successors, (9632) [2021-11-19 14:15:58,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25612 states to 25612 states and 44166 transitions. [2021-11-19 14:15:58,844 INFO L78 Accepts]: Start accepts. Automaton has 25612 states and 44166 transitions. Word has length 163 [2021-11-19 14:15:58,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:15:58,845 INFO L470 AbstractCegarLoop]: Abstraction has 25612 states and 44166 transitions. [2021-11-19 14:15:58,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 states have internal predecessors, (108), 2 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-19 14:15:58,845 INFO L276 IsEmpty]: Start isEmpty. Operand 25612 states and 44166 transitions. [2021-11-19 14:15:58,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-19 14:15:58,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:15:58,848 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:58,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-19 14:15:59,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:15:59,053 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:15:59,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:15:59,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1228102106, now seen corresponding path program 1 times [2021-11-19 14:15:59,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:15:59,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735275597] [2021-11-19 14:15:59,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:15:59,055 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:15:59,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:15:59,055 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:15:59,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-19 14:15:59,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:15:59,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 14:15:59,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:16:00,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-19 14:16:00,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:00,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735275597] [2021-11-19 14:16:00,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735275597] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:16:00,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:16:00,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-11-19 14:16:00,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037455620] [2021-11-19 14:16:00,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:00,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 14:16:00,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:00,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 14:16:00,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-19 14:16:00,556 INFO L87 Difference]: Start difference. First operand 25612 states and 44166 transitions. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-19 14:16:05,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:05,909 INFO L93 Difference]: Finished difference Result 57566 states and 105324 transitions. [2021-11-19 14:16:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 14:16:05,910 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 165 [2021-11-19 14:16:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:06,086 INFO L225 Difference]: With dead ends: 57566 [2021-11-19 14:16:06,086 INFO L226 Difference]: Without dead ends: 31972 [2021-11-19 14:16:06,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:16:06,233 INFO L933 BasicCegarLoop]: 1065 mSDtfsCounter, 1796 mSDsluCounter, 2744 mSDsCounter, 0 mSdLazyCounter, 2008 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1853 SdHoareTripleChecker+Valid, 3809 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:06,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1853 Valid, 3809 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2008 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-19 14:16:06,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31972 states. [2021-11-19 14:16:07,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31972 to 25612. [2021-11-19 14:16:07,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25612 states, 19564 states have (on average 1.535933346963811) internal successors, (30049), 20302 states have internal predecessors, (30049), 4469 states have call successors, (4469), 1491 states have call predecessors, (4469), 1578 states have return successors, (9632), 4426 states have call predecessors, (9632), 4419 states have call successors, (9632) [2021-11-19 14:16:07,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25612 states to 25612 states and 44150 transitions. [2021-11-19 14:16:08,003 INFO L78 Accepts]: Start accepts. Automaton has 25612 states and 44150 transitions. Word has length 165 [2021-11-19 14:16:08,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:08,005 INFO L470 AbstractCegarLoop]: Abstraction has 25612 states and 44150 transitions. [2021-11-19 14:16:08,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 5 states have internal predecessors, (114), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-19 14:16:08,005 INFO L276 IsEmpty]: Start isEmpty. Operand 25612 states and 44150 transitions. [2021-11-19 14:16:08,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-19 14:16:08,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:08,008 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:16:08,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:08,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:08,209 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:08,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:08,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2020830948, now seen corresponding path program 1 times [2021-11-19 14:16:08,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:08,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1062715824] [2021-11-19 14:16:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:08,211 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:08,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:08,212 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:08,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-19 14:16:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:08,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 14:16:08,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 14:16:08,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 14:16:09,531 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:09,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1062715824] [2021-11-19 14:16:09,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1062715824] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:16:09,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:16:09,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-19 14:16:09,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999318794] [2021-11-19 14:16:09,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:09,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 14:16:09,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:09,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 14:16:09,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-19 14:16:09,533 INFO L87 Difference]: Start difference. First operand 25612 states and 44150 transitions. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 14:16:15,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:15,142 INFO L93 Difference]: Finished difference Result 86742 states and 163122 transitions. [2021-11-19 14:16:15,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:16:15,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) Word has length 171 [2021-11-19 14:16:15,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:15,550 INFO L225 Difference]: With dead ends: 86742 [2021-11-19 14:16:15,550 INFO L226 Difference]: Without dead ends: 61148 [2021-11-19 14:16:15,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-11-19 14:16:15,845 INFO L933 BasicCegarLoop]: 1303 mSDtfsCounter, 993 mSDsluCounter, 5541 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1030 SdHoareTripleChecker+Valid, 6844 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:15,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1030 Valid, 6844 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 14:16:15,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61148 states. [2021-11-19 14:16:19,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61148 to 58788. [2021-11-19 14:16:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58788 states, 42908 states have (on average 1.5263820266616948) internal successors, (65494), 45246 states have internal predecessors, (65494), 12581 states have call successors, (12581), 2979 states have call predecessors, (12581), 3298 states have return successors, (30165), 12594 states have call predecessors, (30165), 12483 states have call successors, (30165) [2021-11-19 14:16:20,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58788 states to 58788 states and 108240 transitions. [2021-11-19 14:16:20,468 INFO L78 Accepts]: Start accepts. Automaton has 58788 states and 108240 transitions. Word has length 171 [2021-11-19 14:16:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:20,469 INFO L470 AbstractCegarLoop]: Abstraction has 58788 states and 108240 transitions. [2021-11-19 14:16:20,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 6 states have internal predecessors, (116), 3 states have call successors, (23), 3 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-19 14:16:20,469 INFO L276 IsEmpty]: Start isEmpty. Operand 58788 states and 108240 transitions. [2021-11-19 14:16:20,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-19 14:16:20,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:20,473 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:16:20,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-19 14:16:20,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 14:16:20,688 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:20,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:20,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1412754085, now seen corresponding path program 1 times [2021-11-19 14:16:20,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 14:16:20,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39704339] [2021-11-19 14:16:20,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:20,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 14:16:20,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 14:16:20,691 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 14:16:20,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41e94a2b-0ad3-4a2d-b47e-39e447e0359f/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-19 14:16:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:21,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 14:16:21,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:16:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-19 14:16:21,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:16:22,106 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-19 14:16:22,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 14:16:22,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39704339] [2021-11-19 14:16:22,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39704339] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:16:22,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 14:16:22,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-19 14:16:22,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427801205] [2021-11-19 14:16:22,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:22,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 14:16:22,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 14:16:22,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 14:16:22,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:16:22,112 INFO L87 Difference]: Start difference. First operand 58788 states and 108240 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21)