./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.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_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/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_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/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_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/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 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:02:16,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:02:16,883 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:02:16,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:02:16,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:02:16,939 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:02:16,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:02:16,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:02:16,945 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:02:16,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:02:16,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:02:16,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:02:16,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:02:16,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:02:16,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:02:16,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:02:16,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:02:16,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:02:16,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:02:16,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:02:16,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:02:16,973 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:02:16,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:02:16,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:02:16,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:02:16,982 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:02:16,982 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:02:16,983 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:02:16,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:02:16,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:02:16,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:02:16,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:02:16,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:02:16,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:02:17,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:02:17,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:02:17,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:02:17,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:02:17,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:02:17,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:02:17,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:02:17,013 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:02:17,074 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:02:17,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:02:17,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:02:17,077 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:02:17,077 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:02:17,077 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:02:17,077 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:02:17,078 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:02:17,086 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:02:17,086 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:02:17,087 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:02:17,088 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:02:17,088 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:02:17,088 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:02:17,089 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:02:17,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:02:17,090 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:02:17,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:02:17,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:02:17,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:02:17,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:02:17,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:02:17,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:02:17,091 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:02:17,092 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:02:17,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:02:17,092 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:02:17,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:02:17,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:02:17,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:02:17,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:02:17,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:02:17,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:02:17,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:02:17,094 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:02:17,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:02:17,095 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:02:17,095 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:02:17,095 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:02:17,096 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_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e [2021-11-07 02:02:17,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:02:17,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:02:17,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:02:17,411 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:02:17,411 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:02:17,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-07 02:02:17,504 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/data/abc7573fb/6c841978ae5e495abe1917f973e10051/FLAG9accbda27 [2021-11-07 02:02:18,219 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:02:18,219 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-07 02:02:18,240 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/data/abc7573fb/6c841978ae5e495abe1917f973e10051/FLAG9accbda27 [2021-11-07 02:02:18,383 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/data/abc7573fb/6c841978ae5e495abe1917f973e10051 [2021-11-07 02:02:18,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:02:18,388 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:02:18,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:18,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:02:18,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:02:18,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:18" (1/1) ... [2021-11-07 02:02:18,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e03a1ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:18, skipping insertion in model container [2021-11-07 02:02:18,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:18" (1/1) ... [2021-11-07 02:02:18,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:02:18,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:02:18,669 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_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-07 02:02:19,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:19,067 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 02:02:19,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3cf01864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:19, skipping insertion in model container [2021-11-07 02:02:19,067 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:19,068 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:02:19,073 INFO L168 Benchmark]: Toolchain (without parser) took 681.24 ms. Allocated memory is still 140.5 MB. Free memory was 105.0 MB in the beginning and 100.6 MB in the end (delta: 4.4 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-11-07 02:02:19,074 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory is still 48.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:02:19,076 INFO L168 Benchmark]: CACSL2BoogieTranslator took 678.05 ms. Allocated memory is still 140.5 MB. Free memory was 104.6 MB in the beginning and 100.6 MB in the end (delta: 4.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:02:19,078 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory is still 48.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 678.05 ms. Allocated memory is still 140.5 MB. Free memory was 104.6 MB in the beginning and 100.6 MB in the end (delta: 4.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2095]: 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_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/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_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/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_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/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 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:02:21,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:02:21,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:02:21,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:02:21,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:02:21,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:02:21,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:02:21,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:02:21,555 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:02:21,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:02:21,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:02:21,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:02:21,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:02:21,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:02:21,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:02:21,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:02:21,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:02:21,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:02:21,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:02:21,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:02:21,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:02:21,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:02:21,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:02:21,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:02:21,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:02:21,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:02:21,587 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:02:21,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:02:21,589 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:02:21,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:02:21,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:02:21,593 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:02:21,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:02:21,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:02:21,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:02:21,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:02:21,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:02:21,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:02:21,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:02:21,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:02:21,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:02:21,623 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:02:21,655 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:02:21,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:02:21,656 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:02:21,657 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:02:21,657 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:02:21,657 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:02:21,658 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:02:21,658 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:02:21,659 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:02:21,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:02:21,660 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:02:21,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:02:21,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:02:21,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:02:21,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:02:21,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:02:21,662 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:02:21,663 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:02:21,663 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:02:21,663 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:02:21,664 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:02:21,664 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:02:21,664 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:02:21,665 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:02:21,665 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:02:21,665 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:02:21,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:02:21,666 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:02:21,666 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:02:21,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:02:21,667 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:02:21,668 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:02:21,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:02:21,668 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:02:21,669 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:02:21,669 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_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e [2021-11-07 02:02:22,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:02:22,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:02:22,159 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:02:22,160 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:02:22,161 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:02:22,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-07 02:02:22,238 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/data/7337d164d/3d84648e292b4543b57dbade27ca83ec/FLAG73416c223 [2021-11-07 02:02:23,087 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:02:23,088 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-07 02:02:23,112 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/data/7337d164d/3d84648e292b4543b57dbade27ca83ec/FLAG73416c223 [2021-11-07 02:02:23,173 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/data/7337d164d/3d84648e292b4543b57dbade27ca83ec [2021-11-07 02:02:23,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:02:23,182 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:02:23,186 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:23,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:02:23,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:02:23,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:23" (1/1) ... [2021-11-07 02:02:23,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5987f1a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:23, skipping insertion in model container [2021-11-07 02:02:23,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:23" (1/1) ... [2021-11-07 02:02:23,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:02:23,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:02:23,499 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_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-07 02:02:23,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:23,987 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:02:24,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:02:24,009 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_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-07 02:02:24,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:24,186 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:02:24,200 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_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-07 02:02:24,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:24,329 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:02:24,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:24 WrapperNode [2021-11-07 02:02:24,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:24,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:02:24,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:02:24,331 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:02:24,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:24" (1/1) ... [2021-11-07 02:02:24,375 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:24" (1/1) ... [2021-11-07 02:02:24,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:02:24,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:02:24,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:02:24,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:02:24,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:24" (1/1) ... [2021-11-07 02:02:24,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:24" (1/1) ... [2021-11-07 02:02:24,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:24" (1/1) ... [2021-11-07 02:02:24,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:24" (1/1) ... [2021-11-07 02:02:25,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:24" (1/1) ... [2021-11-07 02:02:25,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:24" (1/1) ... [2021-11-07 02:02:25,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:24" (1/1) ... [2021-11-07 02:02:25,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:02:25,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:02:25,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:02:25,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:02:25,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:24" (1/1) ... [2021-11-07 02:02:25,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:02:25,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:02:25,458 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:02:25,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:02:25,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:02:25,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:02:25,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:02:25,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:02:41,885 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:02:41,886 INFO L299 CfgBuilder]: Removed 1503 assume(true) statements. [2021-11-07 02:02:41,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:02:41 BoogieIcfgContainer [2021-11-07 02:02:41,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:02:41,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:02:41,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:02:41,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:02:41,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:02:23" (1/3) ... [2021-11-07 02:02:41,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5386ac1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:02:41, skipping insertion in model container [2021-11-07 02:02:41,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:24" (2/3) ... [2021-11-07 02:02:41,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5386ac1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:02:41, skipping insertion in model container [2021-11-07 02:02:41,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:02:41" (3/3) ... [2021-11-07 02:02:41,904 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product27.cil.c [2021-11-07 02:02:41,910 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:02:41,910 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 02:02:42,000 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:02:42,009 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 02:02:42,009 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:02:42,150 INFO L276 IsEmpty]: Start isEmpty. Operand has 6177 states, 6171 states have (on average 1.8820288445956894) internal successors, (11614), 6176 states have internal predecessors, (11614), 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 02:02:42,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:02:42,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:42,181 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] [2021-11-07 02:02:42,181 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:02:42,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:42,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1918734212, now seen corresponding path program 1 times [2021-11-07 02:02:42,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:42,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998266609] [2021-11-07 02:02:42,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:42,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:42,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:42,210 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:42,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:02:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:42,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:02:42,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:42,869 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 02:02:42,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:43,012 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 02:02:43,013 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:43,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998266609] [2021-11-07 02:02:43,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998266609] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:43,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:43,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:02:43,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605740243] [2021-11-07 02:02:43,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:02:43,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:43,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:02:43,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:02:43,063 INFO L87 Difference]: Start difference. First operand has 6177 states, 6171 states have (on average 1.8820288445956894) internal successors, (11614), 6176 states have internal predecessors, (11614), 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 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 02:02:44,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:44,083 INFO L93 Difference]: Finished difference Result 17350 states and 32619 transitions. [2021-11-07 02:02:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:02:44,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 44 [2021-11-07 02:02:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:44,185 INFO L225 Difference]: With dead ends: 17350 [2021-11-07 02:02:44,185 INFO L226 Difference]: Without dead ends: 11173 [2021-11-07 02:02:44,200 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 84 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 02:02:44,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11173 states. [2021-11-07 02:02:44,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11173 to 6173. [2021-11-07 02:02:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6173 states, 6168 states have (on average 1.8797016861219196) internal successors, (11594), 6172 states have internal predecessors, (11594), 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 02:02:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6173 states to 6173 states and 11594 transitions. [2021-11-07 02:02:44,542 INFO L78 Accepts]: Start accepts. Automaton has 6173 states and 11594 transitions. Word has length 44 [2021-11-07 02:02:44,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:44,542 INFO L470 AbstractCegarLoop]: Abstraction has 6173 states and 11594 transitions. [2021-11-07 02:02:44,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 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 02:02:44,543 INFO L276 IsEmpty]: Start isEmpty. Operand 6173 states and 11594 transitions. [2021-11-07 02:02:44,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 02:02:44,546 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:44,547 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 02:02:44,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:44,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:44,763 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:02:44,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:44,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1796359280, now seen corresponding path program 1 times [2021-11-07 02:02:44,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:44,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729260214] [2021-11-07 02:02:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:44,769 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:44,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:44,770 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:44,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:02:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:45,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:02:45,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:45,318 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 02:02:45,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:45,468 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 02:02:45,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:45,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [729260214] [2021-11-07 02:02:45,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [729260214] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:45,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:45,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:02:45,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289630690] [2021-11-07 02:02:45,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:02:45,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:45,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:02:45,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:02:45,477 INFO L87 Difference]: Start difference. First operand 6173 states and 11594 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 02:02:47,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:47,048 INFO L93 Difference]: Finished difference Result 24657 states and 46301 transitions. [2021-11-07 02:02:47,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:02:47,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 02:02:47,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:47,174 INFO L225 Difference]: With dead ends: 24657 [2021-11-07 02:02:47,174 INFO L226 Difference]: Without dead ends: 18505 [2021-11-07 02:02:47,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:02:47,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18505 states. [2021-11-07 02:02:47,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18505 to 6151. [2021-11-07 02:02:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6151 states, 6146 states have (on average 1.8781321184510251) internal successors, (11543), 6150 states have internal predecessors, (11543), 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 02:02:47,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6151 states to 6151 states and 11543 transitions. [2021-11-07 02:02:47,568 INFO L78 Accepts]: Start accepts. Automaton has 6151 states and 11543 transitions. Word has length 49 [2021-11-07 02:02:47,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:47,568 INFO L470 AbstractCegarLoop]: Abstraction has 6151 states and 11543 transitions. [2021-11-07 02:02:47,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 02:02:47,570 INFO L276 IsEmpty]: Start isEmpty. Operand 6151 states and 11543 transitions. [2021-11-07 02:02:47,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 02:02:47,576 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:47,583 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] [2021-11-07 02:02:47,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:47,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:47,800 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:02:47,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:47,801 INFO L85 PathProgramCache]: Analyzing trace with hash 165615760, now seen corresponding path program 1 times [2021-11-07 02:02:47,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:47,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710912058] [2021-11-07 02:02:47,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:47,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:47,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:47,805 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:47,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:02:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:48,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:02:48,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:48,344 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 02:02:48,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:48,516 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 02:02:48,516 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:48,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710912058] [2021-11-07 02:02:48,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710912058] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:48,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:48,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:02:48,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124991157] [2021-11-07 02:02:48,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:02:48,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:48,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:02:48,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:02:48,521 INFO L87 Difference]: Start difference. First operand 6151 states and 11543 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 02:02:49,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:49,304 INFO L93 Difference]: Finished difference Result 17209 states and 32307 transitions. [2021-11-07 02:02:49,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:02:49,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 50 [2021-11-07 02:02:49,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:49,340 INFO L225 Difference]: With dead ends: 17209 [2021-11-07 02:02:49,340 INFO L226 Difference]: Without dead ends: 11079 [2021-11-07 02:02:49,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 96 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 02:02:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11079 states. [2021-11-07 02:02:49,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11079 to 6151. [2021-11-07 02:02:49,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6151 states, 6146 states have (on average 1.8771558737390173) internal successors, (11537), 6150 states have internal predecessors, (11537), 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 02:02:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6151 states to 6151 states and 11537 transitions. [2021-11-07 02:02:49,672 INFO L78 Accepts]: Start accepts. Automaton has 6151 states and 11537 transitions. Word has length 50 [2021-11-07 02:02:49,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:49,673 INFO L470 AbstractCegarLoop]: Abstraction has 6151 states and 11537 transitions. [2021-11-07 02:02:49,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 02:02:49,674 INFO L276 IsEmpty]: Start isEmpty. Operand 6151 states and 11537 transitions. [2021-11-07 02:02:49,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:02:49,677 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:49,677 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 02:02:49,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:49,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:49,893 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:02:49,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:49,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1761270301, now seen corresponding path program 1 times [2021-11-07 02:02:49,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:49,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760190567] [2021-11-07 02:02:49,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:49,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:49,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:49,897 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:49,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:02:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:50,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:02:50,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:50,621 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 02:02:50,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:50,847 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 02:02:50,847 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:50,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760190567] [2021-11-07 02:02:50,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760190567] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:50,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:50,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:02:50,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400402682] [2021-11-07 02:02:50,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:02:50,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:50,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:02:50,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:02:50,850 INFO L87 Difference]: Start difference. First operand 6151 states and 11537 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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 02:02:52,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:52,914 INFO L93 Difference]: Finished difference Result 34452 states and 64664 transitions. [2021-11-07 02:02:52,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:02:52,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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 02:02:52,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:53,016 INFO L225 Difference]: With dead ends: 34452 [2021-11-07 02:02:53,017 INFO L226 Difference]: Without dead ends: 28325 [2021-11-07 02:02:53,039 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:02:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28325 states. [2021-11-07 02:02:53,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28325 to 6153. [2021-11-07 02:02:53,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 6148 states have (on average 1.876057254391672) internal successors, (11534), 6152 states have internal predecessors, (11534), 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 02:02:53,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 11534 transitions. [2021-11-07 02:02:53,545 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 11534 transitions. Word has length 55 [2021-11-07 02:02:53,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:53,546 INFO L470 AbstractCegarLoop]: Abstraction has 6153 states and 11534 transitions. [2021-11-07 02:02:53,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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 02:02:53,546 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 11534 transitions. [2021-11-07 02:02:53,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:02:53,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:53,549 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 02:02:53,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:53,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:53,770 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:02:53,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:53,770 INFO L85 PathProgramCache]: Analyzing trace with hash 698289871, now seen corresponding path program 1 times [2021-11-07 02:02:53,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:53,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691003559] [2021-11-07 02:02:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:53,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:53,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:53,773 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:53,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:02:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:54,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:02:54,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:54,379 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 02:02:54,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:54,563 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 02:02:54,563 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:54,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691003559] [2021-11-07 02:02:54,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691003559] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:54,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:54,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:02:54,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232323871] [2021-11-07 02:02:54,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:02:54,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:54,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:02:54,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:02:54,566 INFO L87 Difference]: Start difference. First operand 6153 states and 11534 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 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 02:02:58,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:58,272 INFO L93 Difference]: Finished difference Result 22437 states and 42204 transitions. [2021-11-07 02:02:58,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:02:58,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 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 02:02:58,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:58,326 INFO L225 Difference]: With dead ends: 22437 [2021-11-07 02:02:58,326 INFO L226 Difference]: Without dead ends: 16314 [2021-11-07 02:02:58,337 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:02:58,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16314 states. [2021-11-07 02:02:58,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16314 to 6153. [2021-11-07 02:02:58,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 6148 states have (on average 1.832465842550423) internal successors, (11266), 6152 states have internal predecessors, (11266), 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 02:02:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 11266 transitions. [2021-11-07 02:02:58,654 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 11266 transitions. Word has length 56 [2021-11-07 02:02:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:58,655 INFO L470 AbstractCegarLoop]: Abstraction has 6153 states and 11266 transitions. [2021-11-07 02:02:58,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 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 02:02:58,655 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 11266 transitions. [2021-11-07 02:02:58,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:02:58,660 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:58,660 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:58,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-07 02:02:58,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:58,877 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:02:58,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:58,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1500991975, now seen corresponding path program 1 times [2021-11-07 02:02:58,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:58,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229259700] [2021-11-07 02:02:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:58,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:58,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:58,880 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:58,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:02:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:59,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:02:59,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:59,593 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 02:02:59,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:59,839 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 02:02:59,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:59,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229259700] [2021-11-07 02:02:59,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229259700] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:59,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:59,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:02:59,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080918679] [2021-11-07 02:02:59,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:02:59,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:59,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:02:59,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:02:59,842 INFO L87 Difference]: Start difference. First operand 6153 states and 11266 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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 02:03:03,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:03,112 INFO L93 Difference]: Finished difference Result 30941 states and 57501 transitions. [2021-11-07 02:03:03,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 02:03:03,113 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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 68 [2021-11-07 02:03:03,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:03,182 INFO L225 Difference]: With dead ends: 30941 [2021-11-07 02:03:03,182 INFO L226 Difference]: Without dead ends: 24836 [2021-11-07 02:03:03,196 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:03:03,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24836 states. [2021-11-07 02:03:03,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24836 to 8522. [2021-11-07 02:03:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8522 states, 8517 states have (on average 1.8328049782787366) internal successors, (15610), 8521 states have internal predecessors, (15610), 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 02:03:03,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8522 states to 8522 states and 15610 transitions. [2021-11-07 02:03:03,660 INFO L78 Accepts]: Start accepts. Automaton has 8522 states and 15610 transitions. Word has length 68 [2021-11-07 02:03:03,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:03,660 INFO L470 AbstractCegarLoop]: Abstraction has 8522 states and 15610 transitions. [2021-11-07 02:03:03,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 5 states have internal predecessors, (68), 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 02:03:03,661 INFO L276 IsEmpty]: Start isEmpty. Operand 8522 states and 15610 transitions. [2021-11-07 02:03:03,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:03:03,664 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:03,664 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:03,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:03,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:03,880 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:03:03,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:03,881 INFO L85 PathProgramCache]: Analyzing trace with hash -771270727, now seen corresponding path program 1 times [2021-11-07 02:03:03,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:03,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409945141] [2021-11-07 02:03:03,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:03,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:03,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:03,883 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:03,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:03:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:04,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:03:04,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:04,500 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 02:03:04,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:04,702 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 02:03:04,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:04,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409945141] [2021-11-07 02:03:04,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409945141] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:04,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:04,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:03:04,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172174249] [2021-11-07 02:03:04,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:03:04,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:04,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:03:04,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:03:04,704 INFO L87 Difference]: Start difference. First operand 8522 states and 15610 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 02:03:08,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:08,402 INFO L93 Difference]: Finished difference Result 40784 states and 75203 transitions. [2021-11-07 02:03:08,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:03:08,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 70 [2021-11-07 02:03:08,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:08,482 INFO L225 Difference]: With dead ends: 40784 [2021-11-07 02:03:08,482 INFO L226 Difference]: Without dead ends: 32309 [2021-11-07 02:03:08,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 135 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 02:03:08,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32309 states. [2021-11-07 02:03:09,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32309 to 10964. [2021-11-07 02:03:09,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10964 states, 10959 states have (on average 1.83128022629802) internal successors, (20069), 10963 states have internal predecessors, (20069), 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 02:03:09,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10964 states to 10964 states and 20069 transitions. [2021-11-07 02:03:09,255 INFO L78 Accepts]: Start accepts. Automaton has 10964 states and 20069 transitions. Word has length 70 [2021-11-07 02:03:09,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:09,256 INFO L470 AbstractCegarLoop]: Abstraction has 10964 states and 20069 transitions. [2021-11-07 02:03:09,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 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 02:03:09,256 INFO L276 IsEmpty]: Start isEmpty. Operand 10964 states and 20069 transitions. [2021-11-07 02:03:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:03:09,260 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:09,260 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:09,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:09,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:09,476 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:03:09,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:09,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1111135380, now seen corresponding path program 1 times [2021-11-07 02:03:09,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:09,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451909399] [2021-11-07 02:03:09,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:09,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:09,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:09,482 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:09,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:03:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:10,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:03:10,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:10,213 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 02:03:10,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:10,432 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 02:03:10,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:10,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451909399] [2021-11-07 02:03:10,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451909399] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:10,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:10,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:10,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524398769] [2021-11-07 02:03:10,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:03:10,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:10,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:03:10,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:10,435 INFO L87 Difference]: Start difference. First operand 10964 states and 20069 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 02:03:14,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:14,547 INFO L93 Difference]: Finished difference Result 40993 states and 75788 transitions. [2021-11-07 02:03:14,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:03:14,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 71 [2021-11-07 02:03:14,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:14,603 INFO L225 Difference]: With dead ends: 40993 [2021-11-07 02:03:14,603 INFO L226 Difference]: Without dead ends: 30063 [2021-11-07 02:03:14,628 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:03:14,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30063 states. [2021-11-07 02:03:15,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30063 to 19171. [2021-11-07 02:03:15,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19171 states, 19166 states have (on average 1.8187936971720755) internal successors, (34859), 19170 states have internal predecessors, (34859), 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 02:03:15,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19171 states to 19171 states and 34859 transitions. [2021-11-07 02:03:15,563 INFO L78 Accepts]: Start accepts. Automaton has 19171 states and 34859 transitions. Word has length 71 [2021-11-07 02:03:15,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:15,564 INFO L470 AbstractCegarLoop]: Abstraction has 19171 states and 34859 transitions. [2021-11-07 02:03:15,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 3 states have internal predecessors, (71), 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 02:03:15,564 INFO L276 IsEmpty]: Start isEmpty. Operand 19171 states and 34859 transitions. [2021-11-07 02:03:15,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:03:15,566 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:15,567 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:15,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:15,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:15,772 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:03:15,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:15,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1141763356, now seen corresponding path program 1 times [2021-11-07 02:03:15,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:15,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279511230] [2021-11-07 02:03:15,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:15,775 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:15,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:15,776 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:15,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:03:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:16,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:03:16,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:16,566 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 02:03:16,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:16,786 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 02:03:16,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:16,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279511230] [2021-11-07 02:03:16,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279511230] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:16,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:16,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:03:16,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907037554] [2021-11-07 02:03:16,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:03:16,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:16,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:03:16,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:03:16,789 INFO L87 Difference]: Start difference. First operand 19171 states and 34859 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 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 02:03:21,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:21,116 INFO L93 Difference]: Finished difference Result 155234 states and 282853 transitions. [2021-11-07 02:03:21,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:03:21,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 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 73 [2021-11-07 02:03:21,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:21,466 INFO L225 Difference]: With dead ends: 155234 [2021-11-07 02:03:21,466 INFO L226 Difference]: Without dead ends: 136106 [2021-11-07 02:03:21,501 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 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 02:03:21,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136106 states. [2021-11-07 02:03:24,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136106 to 37141. [2021-11-07 02:03:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37141 states, 37136 states have (on average 1.819797501077122) internal successors, (67580), 37140 states have internal predecessors, (67580), 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 02:03:24,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37141 states to 37141 states and 67580 transitions. [2021-11-07 02:03:24,203 INFO L78 Accepts]: Start accepts. Automaton has 37141 states and 67580 transitions. Word has length 73 [2021-11-07 02:03:24,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:24,203 INFO L470 AbstractCegarLoop]: Abstraction has 37141 states and 67580 transitions. [2021-11-07 02:03:24,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 4 states have internal predecessors, (73), 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 02:03:24,203 INFO L276 IsEmpty]: Start isEmpty. Operand 37141 states and 67580 transitions. [2021-11-07 02:03:24,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:03:24,206 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:24,206 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:24,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:24,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:24,412 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:03:24,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:24,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1985768858, now seen corresponding path program 1 times [2021-11-07 02:03:24,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:24,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671464505] [2021-11-07 02:03:24,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:24,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:24,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:24,414 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:24,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:03:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:24,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:03:24,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:25,345 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 02:03:25,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:25,552 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 02:03:25,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:25,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671464505] [2021-11-07 02:03:25,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671464505] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:25,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:25,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:03:25,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387915648] [2021-11-07 02:03:25,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:03:25,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:25,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:03:25,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:03:25,554 INFO L87 Difference]: Start difference. First operand 37141 states and 67580 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 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 02:03:29,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:29,978 INFO L93 Difference]: Finished difference Result 90696 states and 166487 transitions. [2021-11-07 02:03:29,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 02:03:29,979 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 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 73 [2021-11-07 02:03:29,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:30,091 INFO L225 Difference]: With dead ends: 90696 [2021-11-07 02:03:30,091 INFO L226 Difference]: Without dead ends: 70742 [2021-11-07 02:03:30,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-07 02:03:30,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70742 states. [2021-11-07 02:03:32,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70742 to 37093. [2021-11-07 02:03:32,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37093 states, 37088 states have (on average 1.8195642795513374) internal successors, (67484), 37092 states have internal predecessors, (67484), 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 02:03:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37093 states to 37093 states and 67484 transitions. [2021-11-07 02:03:32,163 INFO L78 Accepts]: Start accepts. Automaton has 37093 states and 67484 transitions. Word has length 73 [2021-11-07 02:03:32,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:32,163 INFO L470 AbstractCegarLoop]: Abstraction has 37093 states and 67484 transitions. [2021-11-07 02:03:32,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 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 02:03:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand 37093 states and 67484 transitions. [2021-11-07 02:03:32,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:03:32,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:32,167 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:32,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:32,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:32,371 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:03:32,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:32,372 INFO L85 PathProgramCache]: Analyzing trace with hash -405444256, now seen corresponding path program 1 times [2021-11-07 02:03:32,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:32,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1825755029] [2021-11-07 02:03:32,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:32,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:32,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:32,383 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:32,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:03:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:32,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:03:32,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:33,219 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 02:03:33,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:33,434 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 02:03:33,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:33,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1825755029] [2021-11-07 02:03:33,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1825755029] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:33,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:33,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:03:33,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578739730] [2021-11-07 02:03:33,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:03:33,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:33,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:03:33,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:03:33,436 INFO L87 Difference]: Start difference. First operand 37093 states and 67484 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 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 02:03:38,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:38,016 INFO L93 Difference]: Finished difference Result 142395 states and 260747 transitions. [2021-11-07 02:03:38,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:03:38,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 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 75 [2021-11-07 02:03:38,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:38,231 INFO L225 Difference]: With dead ends: 142395 [2021-11-07 02:03:38,232 INFO L226 Difference]: Without dead ends: 122470 [2021-11-07 02:03:38,266 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 145 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 02:03:38,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122470 states. [2021-11-07 02:03:40,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122470 to 55647. [2021-11-07 02:03:41,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55647 states, 55642 states have (on average 1.8148161460767047) internal successors, (100980), 55646 states have internal predecessors, (100980), 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 02:03:41,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55647 states to 55647 states and 100980 transitions. [2021-11-07 02:03:41,114 INFO L78 Accepts]: Start accepts. Automaton has 55647 states and 100980 transitions. Word has length 75 [2021-11-07 02:03:41,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:41,114 INFO L470 AbstractCegarLoop]: Abstraction has 55647 states and 100980 transitions. [2021-11-07 02:03:41,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 4 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 02:03:41,115 INFO L276 IsEmpty]: Start isEmpty. Operand 55647 states and 100980 transitions. [2021-11-07 02:03:41,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:03:41,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:41,117 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:41,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:41,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:41,318 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:03:41,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:41,319 INFO L85 PathProgramCache]: Analyzing trace with hash 588003212, now seen corresponding path program 1 times [2021-11-07 02:03:41,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:41,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523271659] [2021-11-07 02:03:41,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:41,319 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:41,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:41,320 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:41,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc2d8f-0934-41d2-8f2b-6c6c11ee7c6a/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:03:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:41,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:03:41,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:42,129 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 02:03:42,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:42,369 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 02:03:42,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:42,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523271659] [2021-11-07 02:03:42,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523271659] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:42,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:42,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:03:42,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662874781] [2021-11-07 02:03:42,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:03:42,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:42,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:03:42,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:03:42,371 INFO L87 Difference]: Start difference. First operand 55647 states and 100980 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 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 02:03:53,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:53,679 INFO L93 Difference]: Finished difference Result 249002 states and 455041 transitions. [2021-11-07 02:03:53,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:03:53,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 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 77 [2021-11-07 02:03:53,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:54,125 INFO L225 Difference]: With dead ends: 249002 [2021-11-07 02:03:54,125 INFO L226 Difference]: Without dead ends: 210523 [2021-11-07 02:03:54,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:03:54,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210523 states.