./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_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_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/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_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/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_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/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 7abfb9176afcd07735578408e79f372120c27df81ffb5983e2784997c7f45a43 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:13:21,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:13:21,932 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:13:21,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:13:21,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:13:21,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:13:21,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:13:21,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:13:21,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:13:21,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:13:22,000 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:13:22,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:13:22,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:13:22,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:13:22,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:13:22,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:13:22,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:13:22,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:13:22,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:13:22,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:13:22,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:13:22,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:13:22,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:13:22,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:13:22,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:13:22,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:13:22,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:13:22,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:13:22,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:13:22,044 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:13:22,044 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:13:22,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:13:22,047 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:13:22,048 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:13:22,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:13:22,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:13:22,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:13:22,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:13:22,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:13:22,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:13:22,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:13:22,058 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:13:22,112 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:13:22,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:13:22,114 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:13:22,114 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:13:22,115 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:13:22,116 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:13:22,116 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:13:22,116 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:13:22,116 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:13:22,117 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:13:22,122 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:13:22,122 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:13:22,123 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:13:22,123 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:13:22,123 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:13:22,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:13:22,125 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:13:22,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:13:22,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:13:22,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:13:22,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:13:22,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:13:22,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:13:22,126 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:13:22,127 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:13:22,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:13:22,127 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:13:22,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:13:22,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:13:22,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:13:22,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:13:22,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:13:22,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:13:22,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:13:22,131 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:13:22,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:13:22,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:13:22,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:13:22,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:13:22,132 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_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7abfb9176afcd07735578408e79f372120c27df81ffb5983e2784997c7f45a43 [2021-11-07 02:13:22,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:13:22,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:13:22,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:13:22,562 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:13:22,563 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:13:22,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c [2021-11-07 02:13:22,641 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/data/e060ef7c1/6e627e4bb3d44c239b90dca2eec4088f/FLAG71c076cd9 [2021-11-07 02:13:23,420 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:13:23,422 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c [2021-11-07 02:13:23,463 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/data/e060ef7c1/6e627e4bb3d44c239b90dca2eec4088f/FLAG71c076cd9 [2021-11-07 02:13:23,510 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/data/e060ef7c1/6e627e4bb3d44c239b90dca2eec4088f [2021-11-07 02:13:23,513 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:13:23,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:13:23,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:13:23,517 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:13:23,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:13:23,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:23" (1/1) ... [2021-11-07 02:13:23,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3134033a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:23, skipping insertion in model container [2021-11-07 02:13:23,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:23" (1/1) ... [2021-11-07 02:13:23,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:13:23,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:13:24,053 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_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c[16494,16507] [2021-11-07 02:13:24,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:13:24,430 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 02:13:24,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@96d7ad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:24, skipping insertion in model container [2021-11-07 02:13:24,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:13:24,432 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:13:24,435 INFO L168 Benchmark]: Toolchain (without parser) took 918.63 ms. Allocated memory was 98.6 MB in the beginning and 148.9 MB in the end (delta: 50.3 MB). Free memory was 57.5 MB in the beginning and 107.3 MB in the end (delta: -49.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:13:24,437 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 98.6 MB. Free memory was 76.6 MB in the beginning and 76.5 MB in the end (delta: 55.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:13:24,439 INFO L168 Benchmark]: CACSL2BoogieTranslator took 915.38 ms. Allocated memory was 98.6 MB in the beginning and 148.9 MB in the end (delta: 50.3 MB). Free memory was 57.2 MB in the beginning and 107.3 MB in the end (delta: -50.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2021-11-07 02:13:24,442 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 98.6 MB. Free memory was 76.6 MB in the beginning and 76.5 MB in the end (delta: 55.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 915.38 ms. Allocated memory was 98.6 MB in the beginning and 148.9 MB in the end (delta: 50.3 MB). Free memory was 57.2 MB in the beginning and 107.3 MB in the end (delta: -50.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 77]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/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_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/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_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/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 7abfb9176afcd07735578408e79f372120c27df81ffb5983e2784997c7f45a43 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:13:27,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:13:27,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:13:27,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:13:27,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:13:27,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:13:27,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:13:27,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:13:27,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:13:27,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:13:27,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:13:27,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:13:27,258 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:13:27,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:13:27,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:13:27,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:13:27,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:13:27,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:13:27,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:13:27,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:13:27,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:13:27,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:13:27,292 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:13:27,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:13:27,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:13:27,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:13:27,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:13:27,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:13:27,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:13:27,313 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:13:27,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:13:27,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:13:27,317 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:13:27,318 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:13:27,320 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:13:27,320 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:13:27,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:13:27,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:13:27,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:13:27,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:13:27,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:13:27,327 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:13:27,380 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:13:27,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:13:27,382 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:13:27,382 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:13:27,383 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:13:27,383 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:13:27,383 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:13:27,384 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:13:27,385 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:13:27,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:13:27,388 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:13:27,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:13:27,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:13:27,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:13:27,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:13:27,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:13:27,390 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:13:27,390 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:13:27,390 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:13:27,391 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:13:27,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:13:27,391 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:13:27,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:13:27,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:13:27,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:13:27,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:13:27,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:13:27,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:13:27,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:13:27,394 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:13:27,394 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:13:27,394 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:13:27,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:13:27,395 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:13:27,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:13:27,396 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_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7abfb9176afcd07735578408e79f372120c27df81ffb5983e2784997c7f45a43 [2021-11-07 02:13:27,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:13:27,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:13:27,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:13:27,941 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:13:27,942 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:13:27,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c [2021-11-07 02:13:28,042 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/data/731d1ccb1/6000d8ffe0b44c87997361c74d596404/FLAG7a2be6bf9 [2021-11-07 02:13:28,903 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:13:28,904 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c [2021-11-07 02:13:28,940 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/data/731d1ccb1/6000d8ffe0b44c87997361c74d596404/FLAG7a2be6bf9 [2021-11-07 02:13:29,064 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/data/731d1ccb1/6000d8ffe0b44c87997361c74d596404 [2021-11-07 02:13:29,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:13:29,069 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:13:29,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:13:29,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:13:29,078 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:13:29,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:29" (1/1) ... [2021-11-07 02:13:29,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d9c725c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:29, skipping insertion in model container [2021-11-07 02:13:29,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:13:29" (1/1) ... [2021-11-07 02:13:29,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:13:29,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:13:29,560 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_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c[16494,16507] [2021-11-07 02:13:30,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:13:30,048 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:13:30,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:13:30,147 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_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c[16494,16507] [2021-11-07 02:13:30,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:13:30,230 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:13:30,267 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_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/sv-benchmarks/c/product-lines/elevator_spec2_product27.cil.c[16494,16507] [2021-11-07 02:13:30,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:13:30,390 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:13:30,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:30 WrapperNode [2021-11-07 02:13:30,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:13:30,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:13:30,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:13:30,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:13:30,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:30" (1/1) ... [2021-11-07 02:13:30,446 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:30" (1/1) ... [2021-11-07 02:13:30,663 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:13:30,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:13:30,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:13:30,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:13:30,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:30" (1/1) ... [2021-11-07 02:13:30,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:30" (1/1) ... [2021-11-07 02:13:30,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:30" (1/1) ... [2021-11-07 02:13:30,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:30" (1/1) ... [2021-11-07 02:13:30,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:30" (1/1) ... [2021-11-07 02:13:30,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:30" (1/1) ... [2021-11-07 02:13:30,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:30" (1/1) ... [2021-11-07 02:13:30,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:13:30,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:13:30,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:13:30,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:13:30,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:30" (1/1) ... [2021-11-07 02:13:31,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:13:31,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:13:31,033 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:13:31,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:13:31,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:13:31,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:13:31,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:13:31,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:13:41,375 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:13:41,375 INFO L299 CfgBuilder]: Removed 661 assume(true) statements. [2021-11-07 02:13:41,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:13:41 BoogieIcfgContainer [2021-11-07 02:13:41,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:13:41,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:13:41,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:13:41,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:13:41,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:13:29" (1/3) ... [2021-11-07 02:13:41,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f405a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:13:41, skipping insertion in model container [2021-11-07 02:13:41,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:13:30" (2/3) ... [2021-11-07 02:13:41,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f405a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:13:41, skipping insertion in model container [2021-11-07 02:13:41,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:13:41" (3/3) ... [2021-11-07 02:13:41,398 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product27.cil.c [2021-11-07 02:13:41,405 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:13:41,406 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2021-11-07 02:13:41,500 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:13:41,511 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 02:13:41,511 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-11-07 02:13:41,600 INFO L276 IsEmpty]: Start isEmpty. Operand has 2604 states, 2598 states have (on average 1.8826020015396459) internal successors, (4891), 2603 states have internal predecessors, (4891), 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 02:13:41,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:13:41,658 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:41,659 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 02:13:41,660 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 02:13:41,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:41,667 INFO L85 PathProgramCache]: Analyzing trace with hash 257781798, now seen corresponding path program 1 times [2021-11-07 02:13:41,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:41,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013723134] [2021-11-07 02:13:41,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:41,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:41,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:41,694 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:41,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:13:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:42,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:13:42,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:42,353 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 02:13:42,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:13:42,490 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:42,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013723134] [2021-11-07 02:13:42,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013723134] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:42,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:42,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:13:42,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460411045] [2021-11-07 02:13:42,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:13:42,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:42,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:13:42,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:13:42,533 INFO L87 Difference]: Start difference. First operand has 2604 states, 2598 states have (on average 1.8826020015396459) internal successors, (4891), 2603 states have internal predecessors, (4891), 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 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 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 02:13:42,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:42,675 INFO L93 Difference]: Finished difference Result 2623 states and 4914 transitions. [2021-11-07 02:13:42,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:13:42,677 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 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 02:13:42,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:42,728 INFO L225 Difference]: With dead ends: 2623 [2021-11-07 02:13:42,729 INFO L226 Difference]: Without dead ends: 2600 [2021-11-07 02:13:42,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:13:42,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-11-07 02:13:42,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2600. [2021-11-07 02:13:42,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2595 states have (on average 1.8801541425818882) internal successors, (4879), 2599 states have internal predecessors, (4879), 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 02:13:42,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 4879 transitions. [2021-11-07 02:13:42,963 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 4879 transitions. Word has length 44 [2021-11-07 02:13:42,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:42,964 INFO L470 AbstractCegarLoop]: Abstraction has 2600 states and 4879 transitions. [2021-11-07 02:13:42,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 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 02:13:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 4879 transitions. [2021-11-07 02:13:42,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 02:13:42,973 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:42,973 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] [2021-11-07 02:13:42,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:43,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:43,187 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 02:13:43,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:43,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1566974091, now seen corresponding path program 1 times [2021-11-07 02:13:43,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:43,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091070429] [2021-11-07 02:13:43,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:43,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:43,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:43,192 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:43,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:13:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:43,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:13:43,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:43,817 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 02:13:43,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:43,982 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 02:13:43,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:43,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091070429] [2021-11-07 02:13:43,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091070429] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:43,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:43,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:13:43,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022137426] [2021-11-07 02:13:43,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:13:43,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:43,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:13:43,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:13:43,992 INFO L87 Difference]: Start difference. First operand 2600 states and 4879 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 02:13:44,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:44,266 INFO L93 Difference]: Finished difference Result 5187 states and 9739 transitions. [2021-11-07 02:13:44,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:13:44,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 46 [2021-11-07 02:13:44,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:44,284 INFO L225 Difference]: With dead ends: 5187 [2021-11-07 02:13:44,284 INFO L226 Difference]: Without dead ends: 2600 [2021-11-07 02:13:44,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 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 02:13:44,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2021-11-07 02:13:44,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2600. [2021-11-07 02:13:44,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2600 states, 2595 states have (on average 1.8778420038535646) internal successors, (4873), 2599 states have internal predecessors, (4873), 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 02:13:44,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2600 states to 2600 states and 4873 transitions. [2021-11-07 02:13:44,395 INFO L78 Accepts]: Start accepts. Automaton has 2600 states and 4873 transitions. Word has length 46 [2021-11-07 02:13:44,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:44,395 INFO L470 AbstractCegarLoop]: Abstraction has 2600 states and 4873 transitions. [2021-11-07 02:13:44,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 02:13:44,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2600 states and 4873 transitions. [2021-11-07 02:13:44,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 02:13:44,410 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:44,415 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:13:44,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:44,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:44,632 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 02:13:44,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:44,633 INFO L85 PathProgramCache]: Analyzing trace with hash 47999, now seen corresponding path program 1 times [2021-11-07 02:13:44,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:44,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611183682] [2021-11-07 02:13:44,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:44,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:44,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:44,636 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:44,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:13:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:45,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:13:45,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:45,243 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 02:13:45,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:45,453 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 02:13:45,453 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:45,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611183682] [2021-11-07 02:13:45,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611183682] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:45,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:45,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:13:45,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814640900] [2021-11-07 02:13:45,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:13:45,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:45,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:13:45,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:13:45,456 INFO L87 Difference]: Start difference. First operand 2600 states and 4873 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 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 02:13:45,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:45,703 INFO L93 Difference]: Finished difference Result 5151 states and 9662 transitions. [2021-11-07 02:13:45,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:13:45,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 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 51 [2021-11-07 02:13:45,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:45,796 INFO L225 Difference]: With dead ends: 5151 [2021-11-07 02:13:45,796 INFO L226 Difference]: Without dead ends: 2573 [2021-11-07 02:13:45,802 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:13:45,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2021-11-07 02:13:45,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2573. [2021-11-07 02:13:45,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2568 states have (on average 1.875778816199377) internal successors, (4817), 2572 states have internal predecessors, (4817), 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 02:13:45,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4817 transitions. [2021-11-07 02:13:45,923 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4817 transitions. Word has length 51 [2021-11-07 02:13:45,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:45,924 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 4817 transitions. [2021-11-07 02:13:45,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 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 02:13:45,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4817 transitions. [2021-11-07 02:13:45,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:13:45,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:45,929 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] [2021-11-07 02:13:45,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:46,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:46,146 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 02:13:46,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:46,151 INFO L85 PathProgramCache]: Analyzing trace with hash -311834335, now seen corresponding path program 1 times [2021-11-07 02:13:46,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:46,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262319611] [2021-11-07 02:13:46,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:46,153 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:46,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:46,154 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:46,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:13:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:46,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:13:46,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:46,798 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 02:13:46,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:46,941 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 02:13:46,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:46,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262319611] [2021-11-07 02:13:46,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262319611] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:46,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:46,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:13:46,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589439667] [2021-11-07 02:13:46,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:13:46,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:46,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:13:46,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:13:46,946 INFO L87 Difference]: Start difference. First operand 2573 states and 4817 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:47,100 INFO L93 Difference]: Finished difference Result 5124 states and 9606 transitions. [2021-11-07 02:13:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:13:47,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 02:13:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:47,120 INFO L225 Difference]: With dead ends: 5124 [2021-11-07 02:13:47,120 INFO L226 Difference]: Without dead ends: 2573 [2021-11-07 02:13:47,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 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 02:13:47,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2021-11-07 02:13:47,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2573. [2021-11-07 02:13:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2568 states have (on average 1.8734423676012462) internal successors, (4811), 2572 states have internal predecessors, (4811), 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 02:13:47,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 4811 transitions. [2021-11-07 02:13:47,294 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 4811 transitions. Word has length 52 [2021-11-07 02:13:47,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:47,296 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 4811 transitions. [2021-11-07 02:13:47,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:13:47,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 4811 transitions. [2021-11-07 02:13:47,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 02:13:47,300 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:47,300 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] [2021-11-07 02:13:47,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:47,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:47,521 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 02:13:47,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:47,522 INFO L85 PathProgramCache]: Analyzing trace with hash 72012850, now seen corresponding path program 1 times [2021-11-07 02:13:47,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:47,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251996790] [2021-11-07 02:13:47,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:47,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:47,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:47,525 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:47,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:13:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:48,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:13:48,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:48,232 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 02:13:48,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:48,449 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 02:13:48,449 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:48,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251996790] [2021-11-07 02:13:48,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251996790] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:48,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:48,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:13:48,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438391730] [2021-11-07 02:13:48,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:13:48,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:48,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:13:48,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:13:48,452 INFO L87 Difference]: Start difference. First operand 2573 states and 4811 transitions. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 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 02:13:48,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:48,721 INFO L93 Difference]: Finished difference Result 5118 states and 9589 transitions. [2021-11-07 02:13:48,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:13:48,721 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 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 57 [2021-11-07 02:13:48,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:48,742 INFO L225 Difference]: With dead ends: 5118 [2021-11-07 02:13:48,742 INFO L226 Difference]: Without dead ends: 2570 [2021-11-07 02:13:48,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:13:48,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2021-11-07 02:13:48,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2570. [2021-11-07 02:13:48,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2565 states have (on average 1.872514619883041) internal successors, (4803), 2569 states have internal predecessors, (4803), 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 02:13:48,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 4803 transitions. [2021-11-07 02:13:48,951 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 4803 transitions. Word has length 57 [2021-11-07 02:13:48,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:48,952 INFO L470 AbstractCegarLoop]: Abstraction has 2570 states and 4803 transitions. [2021-11-07 02:13:48,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 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 02:13:48,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 4803 transitions. [2021-11-07 02:13:48,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:13:48,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:48,957 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] [2021-11-07 02:13:48,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:49,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:49,174 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 02:13:49,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:49,175 INFO L85 PathProgramCache]: Analyzing trace with hash 612874754, now seen corresponding path program 1 times [2021-11-07 02:13:49,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:49,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181713114] [2021-11-07 02:13:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:49,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:49,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:49,178 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:49,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:13:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:49,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:13:49,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:49,926 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 02:13:49,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:50,158 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 02:13:50,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:50,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181713114] [2021-11-07 02:13:50,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181713114] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:50,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:50,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:13:50,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031431224] [2021-11-07 02:13:50,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:13:50,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:50,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:13:50,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:13:50,161 INFO L87 Difference]: Start difference. First operand 2570 states and 4803 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 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 02:13:52,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:52,245 INFO L93 Difference]: Finished difference Result 9436 states and 17691 transitions. [2021-11-07 02:13:52,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:13:52,245 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 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 58 [2021-11-07 02:13:52,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:52,293 INFO L225 Difference]: With dead ends: 9436 [2021-11-07 02:13:52,293 INFO L226 Difference]: Without dead ends: 6897 [2021-11-07 02:13:52,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 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 02:13:52,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6897 states. [2021-11-07 02:13:52,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6897 to 2570. [2021-11-07 02:13:52,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2565 states have (on average 1.832748538011696) internal successors, (4701), 2569 states have internal predecessors, (4701), 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 02:13:52,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 4701 transitions. [2021-11-07 02:13:52,505 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 4701 transitions. Word has length 58 [2021-11-07 02:13:52,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:52,507 INFO L470 AbstractCegarLoop]: Abstraction has 2570 states and 4701 transitions. [2021-11-07 02:13:52,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 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 02:13:52,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 4701 transitions. [2021-11-07 02:13:52,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:13:52,532 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:52,532 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] [2021-11-07 02:13:52,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:52,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:52,749 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 02:13:52,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:52,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1261522158, now seen corresponding path program 1 times [2021-11-07 02:13:52,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:52,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434511347] [2021-11-07 02:13:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:52,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:52,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:52,756 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:52,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:13:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:53,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:13:53,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:53,667 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 02:13:53,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:53,932 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 02:13:53,933 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:53,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434511347] [2021-11-07 02:13:53,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434511347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:53,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:53,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:13:53,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230384696] [2021-11-07 02:13:53,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:13:53,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:53,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:13:53,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:13:53,936 INFO L87 Difference]: Start difference. First operand 2570 states and 4701 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 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 02:13:55,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:55,166 INFO L93 Difference]: Finished difference Result 7229 states and 13350 transitions. [2021-11-07 02:13:55,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:13:55,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 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 66 [2021-11-07 02:13:55,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:55,216 INFO L225 Difference]: With dead ends: 7229 [2021-11-07 02:13:55,217 INFO L226 Difference]: Without dead ends: 4708 [2021-11-07 02:13:55,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:13:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4708 states. [2021-11-07 02:13:55,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4708 to 2536. [2021-11-07 02:13:55,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2536 states, 2531 states have (on average 1.8328723824575266) internal successors, (4639), 2535 states have internal predecessors, (4639), 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 02:13:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 4639 transitions. [2021-11-07 02:13:55,419 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 4639 transitions. Word has length 66 [2021-11-07 02:13:55,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:55,420 INFO L470 AbstractCegarLoop]: Abstraction has 2536 states and 4639 transitions. [2021-11-07 02:13:55,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 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 02:13:55,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 4639 transitions. [2021-11-07 02:13:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:13:55,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:55,424 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 02:13:55,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:55,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:55,639 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 02:13:55,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:55,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1622096114, now seen corresponding path program 1 times [2021-11-07 02:13:55,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:55,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004856163] [2021-11-07 02:13:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:55,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:55,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:55,651 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:55,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:13:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:56,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:13:56,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:56,534 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 02:13:56,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:13:56,793 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 02:13:56,793 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:13:56,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004856163] [2021-11-07 02:13:56,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004856163] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:13:56,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:13:56,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:13:56,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383595665] [2021-11-07 02:13:56,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:13:56,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:13:56,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:13:56,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:13:56,796 INFO L87 Difference]: Start difference. First operand 2536 states and 4639 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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 02:13:58,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:13:58,837 INFO L93 Difference]: Finished difference Result 10050 states and 18509 transitions. [2021-11-07 02:13:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:13:58,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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 02:13:58,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:13:58,864 INFO L225 Difference]: With dead ends: 10050 [2021-11-07 02:13:58,865 INFO L226 Difference]: Without dead ends: 7562 [2021-11-07 02:13:58,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:13:58,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7562 states. [2021-11-07 02:13:59,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7562 to 2540. [2021-11-07 02:13:59,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2535 states have (on average 1.8315581854043392) internal successors, (4643), 2539 states have internal predecessors, (4643), 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 02:13:59,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 4643 transitions. [2021-11-07 02:13:59,091 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 4643 transitions. Word has length 68 [2021-11-07 02:13:59,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:13:59,092 INFO L470 AbstractCegarLoop]: Abstraction has 2540 states and 4643 transitions. [2021-11-07 02:13:59,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 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 02:13:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 4643 transitions. [2021-11-07 02:13:59,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:13:59,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:13:59,097 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] [2021-11-07 02:13:59,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:13:59,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:13:59,311 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 02:13:59,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:13:59,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1365563719, now seen corresponding path program 1 times [2021-11-07 02:13:59,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:13:59,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543586000] [2021-11-07 02:13:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:13:59,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:13:59,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:13:59,314 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:13:59,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:13:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:13:59,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:13:59,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:00,038 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 02:14:00,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:00,255 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 02:14:00,255 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:00,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543586000] [2021-11-07 02:14:00,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543586000] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:00,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:00,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:14:00,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429696789] [2021-11-07 02:14:00,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:14:00,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:00,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:14:00,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:14:00,259 INFO L87 Difference]: Start difference. First operand 2540 states and 4643 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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 02:14:08,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:08,970 INFO L93 Difference]: Finished difference Result 6319 states and 11511 transitions. [2021-11-07 02:14:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:14:08,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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 69 [2021-11-07 02:14:08,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:08,986 INFO L225 Difference]: With dead ends: 6319 [2021-11-07 02:14:08,987 INFO L226 Difference]: Without dead ends: 4849 [2021-11-07 02:14:08,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:14:09,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4849 states. [2021-11-07 02:14:09,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4849 to 4716. [2021-11-07 02:14:09,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4716 states, 4711 states have (on average 1.8384631713012098) internal successors, (8661), 4715 states have internal predecessors, (8661), 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 02:14:09,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4716 states to 4716 states and 8661 transitions. [2021-11-07 02:14:09,388 INFO L78 Accepts]: Start accepts. Automaton has 4716 states and 8661 transitions. Word has length 69 [2021-11-07 02:14:09,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:09,390 INFO L470 AbstractCegarLoop]: Abstraction has 4716 states and 8661 transitions. [2021-11-07 02:14:09,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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 02:14:09,391 INFO L276 IsEmpty]: Start isEmpty. Operand 4716 states and 8661 transitions. [2021-11-07 02:14:09,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:14:09,397 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:09,397 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] [2021-11-07 02:14:09,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:09,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:09,611 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 02:14:09,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:09,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1918286327, now seen corresponding path program 1 times [2021-11-07 02:14:09,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:09,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1637107121] [2021-11-07 02:14:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:09,612 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:09,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:09,613 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:09,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:14:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:10,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:14:10,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:10,412 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 02:14:10,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:10,659 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 02:14:10,659 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:10,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1637107121] [2021-11-07 02:14:10,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1637107121] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:10,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:10,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:14:10,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977340709] [2021-11-07 02:14:10,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:14:10,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:10,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:14:10,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:14:10,661 INFO L87 Difference]: Start difference. First operand 4716 states and 8661 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 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 02:14:12,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:12,194 INFO L93 Difference]: Finished difference Result 8479 states and 15508 transitions. [2021-11-07 02:14:12,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:14:12,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 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 69 [2021-11-07 02:14:12,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:12,210 INFO L225 Difference]: With dead ends: 8479 [2021-11-07 02:14:12,210 INFO L226 Difference]: Without dead ends: 4836 [2021-11-07 02:14:12,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 134 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 02:14:12,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4836 states. [2021-11-07 02:14:12,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4836 to 4627. [2021-11-07 02:14:12,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4622 states have (on average 1.822371267849416) internal successors, (8423), 4626 states have internal predecessors, (8423), 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 02:14:12,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 8423 transitions. [2021-11-07 02:14:12,560 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 8423 transitions. Word has length 69 [2021-11-07 02:14:12,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:12,560 INFO L470 AbstractCegarLoop]: Abstraction has 4627 states and 8423 transitions. [2021-11-07 02:14:12,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 3 states have internal predecessors, (69), 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 02:14:12,561 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 8423 transitions. [2021-11-07 02:14:12,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:14:12,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:12,564 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 02:14:12,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-07 02:14:12,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:12,782 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 02:14:12,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:12,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1985308031, now seen corresponding path program 1 times [2021-11-07 02:14:12,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:12,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855596601] [2021-11-07 02:14:12,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:12,783 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:12,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:12,784 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:12,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:14:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:13,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:14:13,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:13,567 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 02:14:13,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:13,793 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 02:14:13,794 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:13,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855596601] [2021-11-07 02:14:13,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855596601] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:13,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:13,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:14:13,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294200147] [2021-11-07 02:14:13,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:14:13,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:13,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:14:13,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:14:13,797 INFO L87 Difference]: Start difference. First operand 4627 states and 8423 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 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 02:14:15,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:15,345 INFO L93 Difference]: Finished difference Result 32924 states and 60253 transitions. [2021-11-07 02:14:15,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 02:14:15,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 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 02:14:15,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:15,488 INFO L225 Difference]: With dead ends: 32924 [2021-11-07 02:14:15,488 INFO L226 Difference]: Without dead ends: 28341 [2021-11-07 02:14:15,499 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 137 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 02:14:15,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28341 states. [2021-11-07 02:14:16,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28341 to 8644. [2021-11-07 02:14:16,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8644 states, 8639 states have (on average 1.8309989582127562) internal successors, (15818), 8643 states have internal predecessors, (15818), 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 02:14:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8644 states to 8644 states and 15818 transitions. [2021-11-07 02:14:16,318 INFO L78 Accepts]: Start accepts. Automaton has 8644 states and 15818 transitions. Word has length 71 [2021-11-07 02:14:16,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:16,319 INFO L470 AbstractCegarLoop]: Abstraction has 8644 states and 15818 transitions. [2021-11-07 02:14:16,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 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 02:14:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 8644 states and 15818 transitions. [2021-11-07 02:14:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:14:16,322 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:16,323 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 02:14:16,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 02:14:16,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:16,539 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 02:14:16,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:16,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1710548417, now seen corresponding path program 1 times [2021-11-07 02:14:16,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:16,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1326133947] [2021-11-07 02:14:16,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:16,541 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:16,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:16,542 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:16,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:14:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:17,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:14:17,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:17,485 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 02:14:17,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:17,723 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 02:14:17,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:17,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1326133947] [2021-11-07 02:14:17,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1326133947] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:17,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:17,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:14:17,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926926950] [2021-11-07 02:14:17,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:14:17,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:17,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:14:17,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:14:17,725 INFO L87 Difference]: Start difference. First operand 8644 states and 15818 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 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 02:14:18,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:18,872 INFO L93 Difference]: Finished difference Result 16225 states and 29593 transitions. [2021-11-07 02:14:18,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:14:18,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 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 02:14:18,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:18,901 INFO L225 Difference]: With dead ends: 16225 [2021-11-07 02:14:18,902 INFO L226 Difference]: Without dead ends: 11257 [2021-11-07 02:14:18,909 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:14:18,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11257 states. [2021-11-07 02:14:19,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11257 to 8630. [2021-11-07 02:14:19,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8630 states, 8625 states have (on average 1.8307246376811595) internal successors, (15790), 8629 states have internal predecessors, (15790), 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 02:14:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8630 states to 8630 states and 15790 transitions. [2021-11-07 02:14:19,490 INFO L78 Accepts]: Start accepts. Automaton has 8630 states and 15790 transitions. Word has length 71 [2021-11-07 02:14:19,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:19,490 INFO L470 AbstractCegarLoop]: Abstraction has 8630 states and 15790 transitions. [2021-11-07 02:14:19,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 5 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 02:14:19,491 INFO L276 IsEmpty]: Start isEmpty. Operand 8630 states and 15790 transitions. [2021-11-07 02:14:19,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:14:19,494 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:19,494 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 02:14:19,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:19,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:19,712 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:14:19,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:19,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1427136123, now seen corresponding path program 1 times [2021-11-07 02:14:19,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:19,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1770405082] [2021-11-07 02:14:19,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:19,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:19,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:19,715 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:19,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:14:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:20,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:14:20,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:20,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:14:20,943 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:20,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1770405082] [2021-11-07 02:14:20,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1770405082] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:20,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:20,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:14:20,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261962947] [2021-11-07 02:14:20,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:14:20,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:20,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:14:20,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:14:20,945 INFO L87 Difference]: Start difference. First operand 8630 states and 15790 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 02:14:22,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:22,397 INFO L93 Difference]: Finished difference Result 34048 states and 62627 transitions. [2021-11-07 02:14:22,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:14:22,398 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 02:14:22,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:22,457 INFO L225 Difference]: With dead ends: 34048 [2021-11-07 02:14:22,457 INFO L226 Difference]: Without dead ends: 29090 [2021-11-07 02:14:22,469 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 02:14:22,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29090 states. [2021-11-07 02:14:23,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29090 to 13309. [2021-11-07 02:14:23,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13309 states, 13304 states have (on average 1.8278713168971739) internal successors, (24318), 13308 states have internal predecessors, (24318), 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 02:14:23,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13309 states to 13309 states and 24318 transitions. [2021-11-07 02:14:23,458 INFO L78 Accepts]: Start accepts. Automaton has 13309 states and 24318 transitions. Word has length 73 [2021-11-07 02:14:23,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:23,459 INFO L470 AbstractCegarLoop]: Abstraction has 13309 states and 24318 transitions. [2021-11-07 02:14:23,459 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 02:14:23,459 INFO L276 IsEmpty]: Start isEmpty. Operand 13309 states and 24318 transitions. [2021-11-07 02:14:23,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 02:14:23,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:23,462 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 02:14:23,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:23,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:23,679 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:14:23,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:23,679 INFO L85 PathProgramCache]: Analyzing trace with hash 2017223191, now seen corresponding path program 1 times [2021-11-07 02:14:23,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:23,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709732191] [2021-11-07 02:14:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:23,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:23,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:23,682 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:23,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:14:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:24,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:14:24,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:24,608 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 02:14:24,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:24,943 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 02:14:24,943 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:24,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709732191] [2021-11-07 02:14:24,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709732191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:24,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:24,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:14:24,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364450276] [2021-11-07 02:14:24,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:14:24,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:24,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:14:24,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:14:24,945 INFO L87 Difference]: Start difference. First operand 13309 states and 24318 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 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 02:14:29,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:29,515 INFO L93 Difference]: Finished difference Result 72302 states and 133015 transitions. [2021-11-07 02:14:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:14:29,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 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 02:14:29,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:29,605 INFO L225 Difference]: With dead ends: 72302 [2021-11-07 02:14:29,605 INFO L226 Difference]: Without dead ends: 62665 [2021-11-07 02:14:29,627 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 144 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 02:14:29,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62665 states. [2021-11-07 02:14:32,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62665 to 21397. [2021-11-07 02:14:32,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21397 states, 21392 states have (on average 1.8352187733732237) internal successors, (39259), 21396 states have internal predecessors, (39259), 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 02:14:32,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21397 states to 21397 states and 39259 transitions. [2021-11-07 02:14:32,275 INFO L78 Accepts]: Start accepts. Automaton has 21397 states and 39259 transitions. Word has length 75 [2021-11-07 02:14:32,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:32,275 INFO L470 AbstractCegarLoop]: Abstraction has 21397 states and 39259 transitions. [2021-11-07 02:14:32,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 5 states have internal predecessors, (129), 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 02:14:32,275 INFO L276 IsEmpty]: Start isEmpty. Operand 21397 states and 39259 transitions. [2021-11-07 02:14:32,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 02:14:32,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:32,278 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, 1, 1, 1, 1, 1] [2021-11-07 02:14:32,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:32,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:32,496 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:14:32,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:32,497 INFO L85 PathProgramCache]: Analyzing trace with hash -575052500, now seen corresponding path program 1 times [2021-11-07 02:14:32,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:32,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757134794] [2021-11-07 02:14:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:32,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:32,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:32,500 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:32,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:14:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:33,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:14:33,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:33,383 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 02:14:33,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:33,553 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 02:14:33,553 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:33,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757134794] [2021-11-07 02:14:33,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757134794] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:33,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:33,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:14:33,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228112529] [2021-11-07 02:14:33,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:14:33,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:33,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:14:33,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:14:33,555 INFO L87 Difference]: Start difference. First operand 21397 states and 39259 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 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 02:14:34,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:34,761 INFO L93 Difference]: Finished difference Result 39254 states and 71916 transitions. [2021-11-07 02:14:34,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:14:34,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 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 82 [2021-11-07 02:14:34,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:34,787 INFO L225 Difference]: With dead ends: 39254 [2021-11-07 02:14:34,788 INFO L226 Difference]: Without dead ends: 21412 [2021-11-07 02:14:34,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:14:34,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21412 states. [2021-11-07 02:14:36,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21412 to 21397. [2021-11-07 02:14:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21397 states, 21392 states have (on average 1.8285807778608825) internal successors, (39117), 21396 states have internal predecessors, (39117), 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 02:14:36,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21397 states to 21397 states and 39117 transitions. [2021-11-07 02:14:36,087 INFO L78 Accepts]: Start accepts. Automaton has 21397 states and 39117 transitions. Word has length 82 [2021-11-07 02:14:36,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:36,088 INFO L470 AbstractCegarLoop]: Abstraction has 21397 states and 39117 transitions. [2021-11-07 02:14:36,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 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 02:14:36,088 INFO L276 IsEmpty]: Start isEmpty. Operand 21397 states and 39117 transitions. [2021-11-07 02:14:36,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 02:14:36,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:36,091 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, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:36,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:14:36,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:36,308 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:14:36,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:36,309 INFO L85 PathProgramCache]: Analyzing trace with hash 325156380, now seen corresponding path program 1 times [2021-11-07 02:14:36,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:36,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1633110213] [2021-11-07 02:14:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:36,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:36,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:36,310 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:36,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:14:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:37,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:14:37,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:37,297 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 02:14:37,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:37,559 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 02:14:37,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:37,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1633110213] [2021-11-07 02:14:37,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1633110213] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:37,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:37,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 02:14:37,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656724640] [2021-11-07 02:14:37,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:14:37,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:37,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:14:37,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:14:37,561 INFO L87 Difference]: Start difference. First operand 21397 states and 39117 transitions. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 9 states have internal predecessors, (157), 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 02:14:49,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:14:49,545 INFO L93 Difference]: Finished difference Result 129482 states and 235185 transitions. [2021-11-07 02:14:49,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 02:14:49,545 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 9 states have internal predecessors, (157), 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 83 [2021-11-07 02:14:49,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:14:49,733 INFO L225 Difference]: With dead ends: 129482 [2021-11-07 02:14:49,733 INFO L226 Difference]: Without dead ends: 109757 [2021-11-07 02:14:49,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 02:14:49,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109757 states. [2021-11-07 02:14:53,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109757 to 46837. [2021-11-07 02:14:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46837 states, 46832 states have (on average 1.8279808677827127) internal successors, (85608), 46836 states have internal predecessors, (85608), 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 02:14:53,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46837 states to 46837 states and 85608 transitions. [2021-11-07 02:14:53,756 INFO L78 Accepts]: Start accepts. Automaton has 46837 states and 85608 transitions. Word has length 83 [2021-11-07 02:14:53,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:14:53,756 INFO L470 AbstractCegarLoop]: Abstraction has 46837 states and 85608 transitions. [2021-11-07 02:14:53,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 9 states have internal predecessors, (157), 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 02:14:53,756 INFO L276 IsEmpty]: Start isEmpty. Operand 46837 states and 85608 transitions. [2021-11-07 02:14:53,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 02:14:53,759 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:14:53,759 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:14:53,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 02:14:53,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:14:53,978 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:14:53,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:14:53,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1109748357, now seen corresponding path program 1 times [2021-11-07 02:14:53,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:14:53,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913769559] [2021-11-07 02:14:53,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:14:53,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:14:53,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:14:53,980 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:14:53,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:14:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:14:54,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:14:54,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:14:54,996 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 02:14:54,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:14:55,304 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 02:14:55,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:14:55,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913769559] [2021-11-07 02:14:55,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913769559] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:14:55,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:14:55,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:14:55,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593279868] [2021-11-07 02:14:55,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:14:55,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:14:55,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:14:55,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:14:55,307 INFO L87 Difference]: Start difference. First operand 46837 states and 85608 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 02:15:00,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:15:00,839 INFO L93 Difference]: Finished difference Result 138153 states and 252645 transitions. [2021-11-07 02:15:00,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:15:00,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 84 [2021-11-07 02:15:00,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:15:01,023 INFO L225 Difference]: With dead ends: 138153 [2021-11-07 02:15:01,023 INFO L226 Difference]: Without dead ends: 93052 [2021-11-07 02:15:01,067 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:15:01,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93052 states. [2021-11-07 02:15:07,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93052 to 93050. [2021-11-07 02:15:07,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93050 states, 93045 states have (on average 1.828910742114031) internal successors, (170171), 93049 states have internal predecessors, (170171), 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 02:15:07,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93050 states to 93050 states and 170171 transitions. [2021-11-07 02:15:07,343 INFO L78 Accepts]: Start accepts. Automaton has 93050 states and 170171 transitions. Word has length 84 [2021-11-07 02:15:07,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:15:07,343 INFO L470 AbstractCegarLoop]: Abstraction has 93050 states and 170171 transitions. [2021-11-07 02:15:07,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 02:15:07,343 INFO L276 IsEmpty]: Start isEmpty. Operand 93050 states and 170171 transitions. [2021-11-07 02:15:07,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 02:15:07,347 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:15:07,347 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:15:07,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:15:07,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:15:07,548 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2021-11-07 02:15:07,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:15:07,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1922512899, now seen corresponding path program 1 times [2021-11-07 02:15:07,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:15:07,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075337193] [2021-11-07 02:15:07,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:15:07,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:15:07,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:15:07,550 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:15:07,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea5f56c5-33a2-4e41-aa57-901eb0ecbc29/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:15:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:15:08,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 02:15:08,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:15:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:15:08,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:15:09,193 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 02:15:09,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:15:09,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075337193] [2021-11-07 02:15:09,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075337193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:15:09,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:15:09,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:15:09,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649948867] [2021-11-07 02:15:09,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:15:09,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:15:09,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:15:09,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:15:09,197 INFO L87 Difference]: Start difference. First operand 93050 states and 170171 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 5 states have internal predecessors, (152), 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)