./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8 --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 752f24c6361e3daac9b48908e677c53c177497426b343006dfb6bc7474fe1fb2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:10:30,974 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:10:30,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:10:31,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:10:31,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:10:31,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:10:31,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:10:31,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:10:31,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:10:31,016 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:10:31,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:10:31,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:10:31,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:10:31,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:10:31,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:10:31,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:10:31,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:10:31,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:10:31,028 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:10:31,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:10:31,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:10:31,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:10:31,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:10:31,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:10:31,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:10:31,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:10:31,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:10:31,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:10:31,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:10:31,044 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:10:31,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:10:31,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:10:31,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:10:31,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:10:31,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:10:31,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:10:31,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:10:31,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:10:31,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:10:31,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:10:31,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:10:31,054 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:10:31,085 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:10:31,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:10:31,086 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:10:31,086 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:10:31,086 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:10:31,093 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:10:31,093 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:10:31,093 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:10:31,093 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:10:31,094 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:10:31,095 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:10:31,095 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:10:31,095 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:10:31,095 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:10:31,096 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:10:31,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:10:31,097 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:10:31,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:10:31,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:10:31,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:10:31,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:10:31,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:10:31,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:10:31,098 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:10:31,098 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:10:31,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:10:31,099 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:10:31,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:10:31,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:10:31,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:10:31,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:10:31,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:10:31,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:10:31,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:10:31,102 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:10:31,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:10:31,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:10:31,103 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:10:31,103 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:10:31,103 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_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 752f24c6361e3daac9b48908e677c53c177497426b343006dfb6bc7474fe1fb2 [2021-11-07 01:10:31,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:10:31,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:10:31,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:10:31,432 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:10:31,433 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:10:31,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c [2021-11-07 01:10:31,513 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/data/da6108285/bef456182c1f45dab963879e5392b7b3/FLAG47e6db747 [2021-11-07 01:10:32,089 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:10:32,090 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c [2021-11-07 01:10:32,130 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/data/da6108285/bef456182c1f45dab963879e5392b7b3/FLAG47e6db747 [2021-11-07 01:10:32,359 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/data/da6108285/bef456182c1f45dab963879e5392b7b3 [2021-11-07 01:10:32,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:10:32,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:10:32,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:10:32,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:10:32,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:10:32,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:10:32" (1/1) ... [2021-11-07 01:10:32,372 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f9b611f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:32, skipping insertion in model container [2021-11-07 01:10:32,372 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:10:32" (1/1) ... [2021-11-07 01:10:32,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:10:32,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:10:32,634 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c[1545,1558] [2021-11-07 01:10:33,015 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:10:33,026 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) [2021-11-07 01:10:33,027 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4c4a959e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:33, skipping insertion in model container [2021-11-07 01:10:33,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:10:33,027 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:10:33,030 INFO L168 Benchmark]: Toolchain (without parser) took 665.73 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 55.0 MB in the beginning and 71.5 MB in the end (delta: -16.5 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-11-07 01:10:33,030 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory was 63.6 MB in the beginning and 63.6 MB in the end (delta: 29.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:10:33,032 INFO L168 Benchmark]: CACSL2BoogieTranslator took 660.16 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 54.8 MB in the beginning and 71.5 MB in the end (delta: -16.7 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:10:33,034 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 92.3 MB. Free memory was 63.6 MB in the beginning and 63.6 MB in the end (delta: 29.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 660.16 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 54.8 MB in the beginning and 71.5 MB in the end (delta: -16.7 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 316]: 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_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8 --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 752f24c6361e3daac9b48908e677c53c177497426b343006dfb6bc7474fe1fb2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:10:35,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:10:35,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:10:35,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:10:35,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:10:35,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:10:35,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:10:35,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:10:35,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:10:35,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:10:35,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:10:35,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:10:35,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:10:35,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:10:35,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:10:35,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:10:35,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:10:35,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:10:35,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:10:35,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:10:35,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:10:35,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:10:35,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:10:35,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:10:35,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:10:35,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:10:35,287 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:10:35,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:10:35,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:10:35,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:10:35,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:10:35,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:10:35,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:10:35,292 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:10:35,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:10:35,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:10:35,295 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:10:35,295 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:10:35,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:10:35,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:10:35,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:10:35,315 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:10:35,354 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:10:35,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:10:35,355 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:10:35,356 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:10:35,356 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:10:35,356 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:10:35,356 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:10:35,357 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:10:35,357 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:10:35,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:10:35,360 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:10:35,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:10:35,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:10:35,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:10:35,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:10:35,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:10:35,361 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:10:35,361 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:10:35,361 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:10:35,361 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:10:35,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:10:35,362 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:10:35,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:10:35,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:10:35,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:10:35,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:10:35,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:10:35,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:10:35,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:10:35,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:10:35,364 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:10:35,364 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:10:35,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:10:35,364 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:10:35,365 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:10:35,365 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_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 752f24c6361e3daac9b48908e677c53c177497426b343006dfb6bc7474fe1fb2 [2021-11-07 01:10:35,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:10:35,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:10:35,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:10:35,737 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:10:35,738 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:10:35,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c [2021-11-07 01:10:35,811 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/data/fa674b621/2072e78cbd4f4a40abd17b65135f0519/FLAGb0a6783f6 [2021-11-07 01:10:36,496 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:10:36,496 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c [2021-11-07 01:10:36,525 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/data/fa674b621/2072e78cbd4f4a40abd17b65135f0519/FLAGb0a6783f6 [2021-11-07 01:10:36,668 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/data/fa674b621/2072e78cbd4f4a40abd17b65135f0519 [2021-11-07 01:10:36,673 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:10:36,676 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:10:36,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:10:36,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:10:36,682 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:10:36,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:10:36" (1/1) ... [2021-11-07 01:10:36,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c45f085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:36, skipping insertion in model container [2021-11-07 01:10:36,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:10:36" (1/1) ... [2021-11-07 01:10:36,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:10:36,787 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:10:37,032 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c[1545,1558] [2021-11-07 01:10:37,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:10:37,530 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:10:37,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:10:37,555 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c[1545,1558] [2021-11-07 01:10:37,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:10:37,701 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:10:37,713 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/sv-benchmarks/c/product-lines/elevator_spec3_product31.cil.c[1545,1558] [2021-11-07 01:10:37,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:10:37,888 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:10:37,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:37 WrapperNode [2021-11-07 01:10:37,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:10:37,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:10:37,890 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:10:37,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:10:37,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:37" (1/1) ... [2021-11-07 01:10:37,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:37" (1/1) ... [2021-11-07 01:10:38,629 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:10:38,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:10:38,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:10:38,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:10:38,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:37" (1/1) ... [2021-11-07 01:10:38,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:37" (1/1) ... [2021-11-07 01:10:38,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:37" (1/1) ... [2021-11-07 01:10:38,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:37" (1/1) ... [2021-11-07 01:10:39,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:37" (1/1) ... [2021-11-07 01:10:39,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:37" (1/1) ... [2021-11-07 01:10:39,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:37" (1/1) ... [2021-11-07 01:10:39,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:10:39,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:10:39,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:10:39,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:10:39,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:37" (1/1) ... [2021-11-07 01:10:39,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:10:39,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:10:39,712 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:10:39,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:10:39,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:10:39,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:10:39,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:10:39,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:10:59,772 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:10:59,772 INFO L299 CfgBuilder]: Removed 2197 assume(true) statements. [2021-11-07 01:10:59,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:10:59 BoogieIcfgContainer [2021-11-07 01:10:59,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:10:59,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:10:59,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:10:59,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:10:59,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:10:36" (1/3) ... [2021-11-07 01:10:59,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108f4513 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:10:59, skipping insertion in model container [2021-11-07 01:10:59,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:10:37" (2/3) ... [2021-11-07 01:10:59,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108f4513 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:10:59, skipping insertion in model container [2021-11-07 01:10:59,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:10:59" (3/3) ... [2021-11-07 01:10:59,793 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product31.cil.c [2021-11-07 01:10:59,798 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:10:59,799 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-07 01:10:59,884 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:10:59,891 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 [2021-11-07 01:10:59,891 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-07 01:11:00,176 INFO L276 IsEmpty]: Start isEmpty. Operand has 9253 states, 9242 states have (on average 1.884332395585371) internal successors, (17415), 9252 states have internal predecessors, (17415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:00,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:11:00,206 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:00,207 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:00,208 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:11:00,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:00,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1223980468, now seen corresponding path program 1 times [2021-11-07 01:11:00,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:00,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342648058] [2021-11-07 01:11:00,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:00,236 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:00,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:00,242 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:00,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:11:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:00,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:11:00,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:00,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:00,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:01,111 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:01,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342648058] [2021-11-07 01:11:01,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342648058] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:01,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:01,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:11:01,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377848480] [2021-11-07 01:11:01,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:11:01,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:01,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:11:01,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:11:01,159 INFO L87 Difference]: Start difference. First operand has 9253 states, 9242 states have (on average 1.884332395585371) internal successors, (17415), 9252 states have internal predecessors, (17415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:04,954 INFO L93 Difference]: Finished difference Result 64393 states and 121186 transitions. [2021-11-07 01:11:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:11:04,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 01:11:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:05,323 INFO L225 Difference]: With dead ends: 64393 [2021-11-07 01:11:05,324 INFO L226 Difference]: Without dead ends: 55141 [2021-11-07 01:11:05,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:11:05,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55141 states. [2021-11-07 01:11:06,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55141 to 9265. [2021-11-07 01:11:06,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9265 states, 9255 states have (on average 1.8813614262560778) internal successors, (17412), 9264 states have internal predecessors, (17412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9265 states to 9265 states and 17412 transitions. [2021-11-07 01:11:06,387 INFO L78 Accepts]: Start accepts. Automaton has 9265 states and 17412 transitions. Word has length 47 [2021-11-07 01:11:06,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:06,388 INFO L470 AbstractCegarLoop]: Abstraction has 9265 states and 17412 transitions. [2021-11-07 01:11:06,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:06,389 INFO L276 IsEmpty]: Start isEmpty. Operand 9265 states and 17412 transitions. [2021-11-07 01:11:06,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:11:06,392 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:06,393 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:06,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:06,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:06,607 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:11:06,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:06,608 INFO L85 PathProgramCache]: Analyzing trace with hash -485221858, now seen corresponding path program 1 times [2021-11-07 01:11:06,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:06,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576551613] [2021-11-07 01:11:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:06,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:06,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:06,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:06,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:11:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:06,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:11:06,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:07,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:07,248 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:07,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576551613] [2021-11-07 01:11:07,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576551613] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:07,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:07,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:07,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362024666] [2021-11-07 01:11:07,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:07,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:07,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:07,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:07,252 INFO L87 Difference]: Start difference. First operand 9265 states and 17412 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:07,577 INFO L93 Difference]: Finished difference Result 18442 states and 34667 transitions. [2021-11-07 01:11:07,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:07,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:11:07,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:07,601 INFO L225 Difference]: With dead ends: 18442 [2021-11-07 01:11:07,602 INFO L226 Difference]: Without dead ends: 9191 [2021-11-07 01:11:07,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:07,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9191 states. [2021-11-07 01:11:07,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9191 to 9191. [2021-11-07 01:11:07,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9191 states, 9181 states have (on average 1.8808408670079513) internal successors, (17268), 9190 states have internal predecessors, (17268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:07,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9191 states to 9191 states and 17268 transitions. [2021-11-07 01:11:07,863 INFO L78 Accepts]: Start accepts. Automaton has 9191 states and 17268 transitions. Word has length 49 [2021-11-07 01:11:07,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:07,863 INFO L470 AbstractCegarLoop]: Abstraction has 9191 states and 17268 transitions. [2021-11-07 01:11:07,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:07,864 INFO L276 IsEmpty]: Start isEmpty. Operand 9191 states and 17268 transitions. [2021-11-07 01:11:07,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:11:07,867 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:07,867 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:07,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:08,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:08,081 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:11:08,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:08,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1082551236, now seen corresponding path program 1 times [2021-11-07 01:11:08,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:08,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271195409] [2021-11-07 01:11:08,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:08,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:08,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:08,090 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:08,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:11:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:08,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:11:08,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:08,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:08,815 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:08,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271195409] [2021-11-07 01:11:08,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271195409] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:08,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:08,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:11:08,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715511726] [2021-11-07 01:11:08,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:11:08,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:08,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:11:08,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:11:08,818 INFO L87 Difference]: Start difference. First operand 9191 states and 17268 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:09,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:09,548 INFO L93 Difference]: Finished difference Result 18356 states and 34499 transitions. [2021-11-07 01:11:09,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:11:09,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:11:09,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:09,573 INFO L225 Difference]: With dead ends: 18356 [2021-11-07 01:11:09,573 INFO L226 Difference]: Without dead ends: 9191 [2021-11-07 01:11:09,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:11:09,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9191 states. [2021-11-07 01:11:09,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9191 to 9191. [2021-11-07 01:11:09,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9191 states, 9181 states have (on average 1.8797516610391025) internal successors, (17258), 9190 states have internal predecessors, (17258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:10,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9191 states to 9191 states and 17258 transitions. [2021-11-07 01:11:10,055 INFO L78 Accepts]: Start accepts. Automaton has 9191 states and 17258 transitions. Word has length 51 [2021-11-07 01:11:10,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:10,056 INFO L470 AbstractCegarLoop]: Abstraction has 9191 states and 17258 transitions. [2021-11-07 01:11:10,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:10,057 INFO L276 IsEmpty]: Start isEmpty. Operand 9191 states and 17258 transitions. [2021-11-07 01:11:10,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:11:10,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:10,060 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:10,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:10,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:10,274 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:11:10,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:10,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1419041018, now seen corresponding path program 1 times [2021-11-07 01:11:10,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:10,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887544790] [2021-11-07 01:11:10,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:10,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:10,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:10,279 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:10,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:11:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:10,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:11:10,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:10,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:11,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:11,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887544790] [2021-11-07 01:11:11,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887544790] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:11,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:11,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:11:11,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926543948] [2021-11-07 01:11:11,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:11:11,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:11,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:11:11,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:11:11,086 INFO L87 Difference]: Start difference. First operand 9191 states and 17258 transitions. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:16,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:16,662 INFO L93 Difference]: Finished difference Result 40976 states and 76529 transitions. [2021-11-07 01:11:16,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 01:11:16,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:11:16,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:16,769 INFO L225 Difference]: With dead ends: 40976 [2021-11-07 01:11:16,770 INFO L226 Difference]: Without dead ends: 31855 [2021-11-07 01:11:16,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:11:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31855 states. [2021-11-07 01:11:17,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31855 to 16279. [2021-11-07 01:11:17,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16279 states, 16269 states have (on average 1.8795869444956665) internal successors, (30579), 16278 states have internal predecessors, (30579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:17,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16279 states to 16279 states and 30579 transitions. [2021-11-07 01:11:17,694 INFO L78 Accepts]: Start accepts. Automaton has 16279 states and 30579 transitions. Word has length 55 [2021-11-07 01:11:17,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:17,695 INFO L470 AbstractCegarLoop]: Abstraction has 16279 states and 30579 transitions. [2021-11-07 01:11:17,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:17,696 INFO L276 IsEmpty]: Start isEmpty. Operand 16279 states and 30579 transitions. [2021-11-07 01:11:17,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:11:17,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:17,699 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:17,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:17,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:17,920 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:11:17,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:17,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2116336203, now seen corresponding path program 1 times [2021-11-07 01:11:17,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:17,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199444635] [2021-11-07 01:11:17,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:17,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:17,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:17,924 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:17,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:11:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:18,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:11:18,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:18,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:18,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:18,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:18,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199444635] [2021-11-07 01:11:18,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199444635] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:18,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:18,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:11:18,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806799040] [2021-11-07 01:11:18,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:11:18,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:18,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:11:18,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:11:18,698 INFO L87 Difference]: Start difference. First operand 16279 states and 30579 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:25,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:25,269 INFO L93 Difference]: Finished difference Result 133576 states and 250980 transitions. [2021-11-07 01:11:25,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:11:25,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:11:25,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:25,551 INFO L225 Difference]: With dead ends: 133576 [2021-11-07 01:11:25,551 INFO L226 Difference]: Without dead ends: 117367 [2021-11-07 01:11:25,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:11:25,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117367 states. [2021-11-07 01:11:27,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117367 to 29987. [2021-11-07 01:11:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29987 states, 29977 states have (on average 1.875637989124996) internal successors, (56226), 29986 states have internal predecessors, (56226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:27,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29987 states to 29987 states and 56226 transitions. [2021-11-07 01:11:27,671 INFO L78 Accepts]: Start accepts. Automaton has 29987 states and 56226 transitions. Word has length 55 [2021-11-07 01:11:27,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:27,671 INFO L470 AbstractCegarLoop]: Abstraction has 29987 states and 56226 transitions. [2021-11-07 01:11:27,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:27,672 INFO L276 IsEmpty]: Start isEmpty. Operand 29987 states and 56226 transitions. [2021-11-07 01:11:27,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:11:27,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:27,674 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:27,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:27,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:27,888 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:11:27,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:27,889 INFO L85 PathProgramCache]: Analyzing trace with hash -328888753, now seen corresponding path program 1 times [2021-11-07 01:11:27,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:27,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719750575] [2021-11-07 01:11:27,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:27,890 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:27,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:27,902 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:27,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:11:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:28,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:11:28,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:28,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:28,625 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:28,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719750575] [2021-11-07 01:11:28,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719750575] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:28,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:28,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:11:28,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868576880] [2021-11-07 01:11:28,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:28,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:28,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:28,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:28,627 INFO L87 Difference]: Start difference. First operand 29987 states and 56226 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:31,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:31,166 INFO L93 Difference]: Finished difference Result 88801 states and 166484 transitions. [2021-11-07 01:11:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:31,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 01:11:31,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:31,271 INFO L225 Difference]: With dead ends: 88801 [2021-11-07 01:11:31,271 INFO L226 Difference]: Without dead ends: 58846 [2021-11-07 01:11:31,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:31,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58846 states. [2021-11-07 01:11:32,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58846 to 29863. [2021-11-07 01:11:32,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29863 states, 29853 states have (on average 1.8751214283321609) internal successors, (55978), 29862 states have internal predecessors, (55978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29863 states to 29863 states and 55978 transitions. [2021-11-07 01:11:32,749 INFO L78 Accepts]: Start accepts. Automaton has 29863 states and 55978 transitions. Word has length 56 [2021-11-07 01:11:32,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:32,750 INFO L470 AbstractCegarLoop]: Abstraction has 29863 states and 55978 transitions. [2021-11-07 01:11:32,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:32,750 INFO L276 IsEmpty]: Start isEmpty. Operand 29863 states and 55978 transitions. [2021-11-07 01:11:32,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:11:32,752 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:32,753 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:32,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:11:32,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:32,977 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:11:32,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:32,978 INFO L85 PathProgramCache]: Analyzing trace with hash -956972974, now seen corresponding path program 1 times [2021-11-07 01:11:32,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:32,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341985881] [2021-11-07 01:11:32,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:32,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:32,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:32,981 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:33,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:11:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:33,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:11:33,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:33,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:33,802 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:33,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341985881] [2021-11-07 01:11:33,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341985881] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:33,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:33,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:11:33,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532194364] [2021-11-07 01:11:33,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:11:33,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:33,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:11:33,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:11:33,805 INFO L87 Difference]: Start difference. First operand 29863 states and 55978 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:51,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:51,589 INFO L93 Difference]: Finished difference Result 113483 states and 212347 transitions. [2021-11-07 01:11:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:11:51,590 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 01:11:51,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:51,721 INFO L225 Difference]: With dead ends: 113483 [2021-11-07 01:11:51,722 INFO L226 Difference]: Without dead ends: 83654 [2021-11-07 01:11:51,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:11:51,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83654 states. [2021-11-07 01:11:54,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83654 to 53963. [2021-11-07 01:11:54,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53963 states, 53953 states have (on average 1.8398420847774914) internal successors, (99265), 53962 states have internal predecessors, (99265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:54,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53963 states to 53963 states and 99265 transitions. [2021-11-07 01:11:54,249 INFO L78 Accepts]: Start accepts. Automaton has 53963 states and 99265 transitions. Word has length 56 [2021-11-07 01:11:54,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:54,250 INFO L470 AbstractCegarLoop]: Abstraction has 53963 states and 99265 transitions. [2021-11-07 01:11:54,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:54,250 INFO L276 IsEmpty]: Start isEmpty. Operand 53963 states and 99265 transitions. [2021-11-07 01:11:54,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:11:54,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:54,251 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:11:54,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-07 01:11:54,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:11:54,452 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:11:54,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:54,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1244318349, now seen corresponding path program 1 times [2021-11-07 01:11:54,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:11:54,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4780165] [2021-11-07 01:11:54,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:54,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:11:54,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:11:54,455 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:11:54,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:11:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:54,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:11:54,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:11:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:55,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:11:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:55,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:11:55,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4780165] [2021-11-07 01:11:55,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4780165] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:55,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:55,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:11:55,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827809908] [2021-11-07 01:11:55,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:11:55,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:11:55,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:11:55,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:11:55,437 INFO L87 Difference]: Start difference. First operand 53963 states and 99265 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:01,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:12:01,321 INFO L93 Difference]: Finished difference Result 211806 states and 389533 transitions. [2021-11-07 01:12:01,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:12:01,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:12:01,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:12:01,614 INFO L225 Difference]: With dead ends: 211806 [2021-11-07 01:12:01,615 INFO L226 Difference]: Without dead ends: 157880 [2021-11-07 01:12:01,669 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:12:01,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157880 states. [2021-11-07 01:12:04,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157880 to 53849. [2021-11-07 01:12:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53849 states, 53839 states have (on average 1.8357510354947157) internal successors, (98835), 53848 states have internal predecessors, (98835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:04,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53849 states to 53849 states and 98835 transitions. [2021-11-07 01:12:04,720 INFO L78 Accepts]: Start accepts. Automaton has 53849 states and 98835 transitions. Word has length 59 [2021-11-07 01:12:04,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:12:04,720 INFO L470 AbstractCegarLoop]: Abstraction has 53849 states and 98835 transitions. [2021-11-07 01:12:04,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:12:04,721 INFO L276 IsEmpty]: Start isEmpty. Operand 53849 states and 98835 transitions. [2021-11-07 01:12:04,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:12:04,723 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:12:04,723 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:12:04,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:12:04,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:12:04,925 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-07 01:12:04,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:12:04,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1715118834, now seen corresponding path program 1 times [2021-11-07 01:12:04,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:12:04,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [960365908] [2021-11-07 01:12:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:12:04,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:12:04,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:12:04,927 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:12:04,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e684bb0b-ea89-4aa5-aa89-45b33aa4d219/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:12:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:12:05,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:12:05,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:12:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:05,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:12:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:12:05,779 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:12:05,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [960365908] [2021-11-07 01:12:05,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [960365908] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:12:05,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:12:05,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:12:05,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089047580] [2021-11-07 01:12:05,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:12:05,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:12:05,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:12:05,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:12:05,781 INFO L87 Difference]: Start difference. First operand 53849 states and 98835 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)