./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH --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 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:46:35,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:46:35,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:46:35,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:46:35,419 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:46:35,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:46:35,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:46:35,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:46:35,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:46:35,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:46:35,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:46:35,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:46:35,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:46:35,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:46:35,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:46:35,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:46:35,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:46:35,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:46:35,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:46:35,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:46:35,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:46:35,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:46:35,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:46:35,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:46:35,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:46:35,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:46:35,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:46:35,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:46:35,483 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:46:35,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:46:35,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:46:35,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:46:35,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:46:35,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:46:35,491 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:46:35,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:46:35,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:46:35,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:46:35,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:46:35,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:46:35,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:46:35,495 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:46:35,538 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:46:35,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:46:35,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:46:35,541 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:46:35,541 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:46:35,541 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:46:35,541 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:46:35,542 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:46:35,542 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:46:35,542 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:46:35,549 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:46:35,550 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:46:35,550 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:46:35,550 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:46:35,550 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:46:35,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:46:35,551 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:46:35,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:46:35,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:46:35,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:46:35,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:46:35,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:46:35,553 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:46:35,553 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:46:35,553 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:46:35,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:46:35,554 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:46:35,554 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:46:35,554 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:46:35,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:46:35,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:46:35,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:46:35,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:46:35,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:46:35,556 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:46:35,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:46:35,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:46:35,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:46:35,557 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:46:35,557 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_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd [2021-11-03 05:46:35,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:46:35,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:46:35,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:46:35,920 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:46:35,920 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:46:35,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2021-11-03 05:46:36,005 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/data/b7d8e4d8b/57113f0a94c1491c9897c735eca920f8/FLAG7e4f9c6e4 [2021-11-03 05:46:36,693 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:46:36,693 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2021-11-03 05:46:36,726 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/data/b7d8e4d8b/57113f0a94c1491c9897c735eca920f8/FLAG7e4f9c6e4 [2021-11-03 05:46:36,902 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/data/b7d8e4d8b/57113f0a94c1491c9897c735eca920f8 [2021-11-03 05:46:36,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:46:36,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:46:36,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:46:36,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:46:36,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:46:36,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:46:36" (1/1) ... [2021-11-03 05:46:36,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65543131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:36, skipping insertion in model container [2021-11-03 05:46:36,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:46:36" (1/1) ... [2021-11-03 05:46:36,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:46:37,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:46:37,579 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_b1793e3d-c7d0-4171-be47-aaea3c681cfe/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2021-11-03 05:46:37,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:46:37,611 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) [2021-11-03 05:46:37,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@204b98e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:37, skipping insertion in model container [2021-11-03 05:46:37,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:46:37,614 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:46:37,616 INFO L168 Benchmark]: Toolchain (without parser) took 709.30 ms. Allocated memory is still 96.5 MB. Free memory was 61.0 MB in the beginning and 57.5 MB in the end (delta: 3.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 05:46:37,617 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 96.5 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:46:37,619 INFO L168 Benchmark]: CACSL2BoogieTranslator took 691.09 ms. Allocated memory is still 96.5 MB. Free memory was 60.8 MB in the beginning and 57.5 MB in the end (delta: 3.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 05:46:37,621 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 96.5 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 691.09 ms. Allocated memory is still 96.5 MB. Free memory was 60.8 MB in the beginning and 57.5 MB in the end (delta: 3.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2070]: 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_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH --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 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:46:39,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:46:39,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:46:39,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:46:39,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:46:39,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:46:39,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:46:39,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:46:39,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:46:39,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:46:39,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:46:39,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:46:39,885 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:46:39,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:46:39,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:46:39,894 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:46:39,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:46:39,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:46:39,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:46:39,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:46:39,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:46:39,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:46:39,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:46:39,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:46:39,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:46:39,928 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:46:39,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:46:39,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:46:39,931 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:46:39,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:46:39,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:46:39,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:46:39,936 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:46:39,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:46:39,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:46:39,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:46:39,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:46:39,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:46:39,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:46:39,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:46:39,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:46:39,954 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 05:46:39,979 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:46:39,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:46:39,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:46:39,980 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:46:39,980 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:46:39,981 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:46:39,981 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:46:39,981 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:46:39,981 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:46:39,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:46:39,982 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:46:39,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:46:39,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:46:39,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:46:39,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:46:39,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:46:39,984 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:46:39,984 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:46:39,984 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:46:39,984 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:46:39,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:46:39,985 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:46:39,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:46:39,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:46:39,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:46:39,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:46:39,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:46:39,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:46:39,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:46:39,988 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:46:39,988 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:46:39,989 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:46:39,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:46:39,989 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:46:39,989 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:46:39,989 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_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64b60b46be25872d2112a950c23ddbe99bccee21bea4e463fd90753650d2a7bd [2021-11-03 05:46:40,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:46:40,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:46:40,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:46:40,439 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:46:40,442 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:46:40,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2021-11-03 05:46:40,529 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/data/659c5a6ff/63ed41fac1c540b7913baa069317294b/FLAG44566e28b [2021-11-03 05:46:41,266 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:46:41,267 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c [2021-11-03 05:46:41,297 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/data/659c5a6ff/63ed41fac1c540b7913baa069317294b/FLAG44566e28b [2021-11-03 05:46:41,426 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/data/659c5a6ff/63ed41fac1c540b7913baa069317294b [2021-11-03 05:46:41,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:46:41,430 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:46:41,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:46:41,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:46:41,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:46:41,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:46:41" (1/1) ... [2021-11-03 05:46:41,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8586a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:41, skipping insertion in model container [2021-11-03 05:46:41,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:46:41" (1/1) ... [2021-11-03 05:46:41,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:46:41,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:46:42,184 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_b1793e3d-c7d0-4171-be47-aaea3c681cfe/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2021-11-03 05:46:42,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:46:42,216 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:46:42,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:46:42,395 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_b1793e3d-c7d0-4171-be47-aaea3c681cfe/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2021-11-03 05:46:42,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:46:42,412 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:46:42,531 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_b1793e3d-c7d0-4171-be47-aaea3c681cfe/sv-benchmarks/c/product-lines/elevator_spec3_product26.cil.c[67702,67715] [2021-11-03 05:46:42,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:46:42,570 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:46:42,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:42 WrapperNode [2021-11-03 05:46:42,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:46:42,571 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:46:42,572 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:46:42,572 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:46:42,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:42" (1/1) ... [2021-11-03 05:46:42,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:42" (1/1) ... [2021-11-03 05:46:43,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:46:43,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:46:43,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:46:43,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:46:43,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:42" (1/1) ... [2021-11-03 05:46:43,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:42" (1/1) ... [2021-11-03 05:46:43,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:42" (1/1) ... [2021-11-03 05:46:43,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:42" (1/1) ... [2021-11-03 05:46:44,079 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:42" (1/1) ... [2021-11-03 05:46:44,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:42" (1/1) ... [2021-11-03 05:46:44,615 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:42" (1/1) ... [2021-11-03 05:46:44,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:46:44,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:46:44,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:46:44,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:46:44,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:42" (1/1) ... [2021-11-03 05:46:44,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:46:44,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:46:44,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:46:44,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:46:44,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:46:44,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:46:44,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:46:44,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:47:07,247 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:47:07,247 INFO L299 CfgBuilder]: Removed 2717 assume(true) statements. [2021-11-03 05:47:07,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:47:07 BoogieIcfgContainer [2021-11-03 05:47:07,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:47:07,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:47:07,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:47:07,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:47:07,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:46:41" (1/3) ... [2021-11-03 05:47:07,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6348de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:47:07, skipping insertion in model container [2021-11-03 05:47:07,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:46:42" (2/3) ... [2021-11-03 05:47:07,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c6348de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:47:07, skipping insertion in model container [2021-11-03 05:47:07,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:47:07" (3/3) ... [2021-11-03 05:47:07,273 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product26.cil.c [2021-11-03 05:47:07,279 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:47:07,279 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-03 05:47:07,381 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:47:07,391 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 [2021-11-03 05:47:07,392 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-03 05:47:07,604 INFO L276 IsEmpty]: Start isEmpty. Operand has 12063 states, 12052 states have (on average 1.8918021905077995) internal successors, (22800), 12062 states have internal predecessors, (22800), 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) [2021-11-03 05:47:07,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-03 05:47:07,622 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:07,623 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] [2021-11-03 05:47:07,624 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:47:07,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:07,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1518968946, now seen corresponding path program 1 times [2021-11-03 05:47:07,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:07,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233115501] [2021-11-03 05:47:07,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:07,653 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:07,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:07,654 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:07,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:47:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:08,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:47:08,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:08,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:08,317 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:08,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233115501] [2021-11-03 05:47:08,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233115501] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:08,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:08,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:47:08,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392886090] [2021-11-03 05:47:08,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:47:08,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:08,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:47:08,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:47:08,375 INFO L87 Difference]: Start difference. First operand has 12063 states, 12052 states have (on average 1.8918021905077995) internal successors, (22800), 12062 states have internal predecessors, (22800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 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) [2021-11-03 05:47:12,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:12,915 INFO L93 Difference]: Finished difference Result 84063 states and 158881 transitions. [2021-11-03 05:47:12,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 05:47:12,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 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 30 [2021-11-03 05:47:12,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:13,320 INFO L225 Difference]: With dead ends: 84063 [2021-11-03 05:47:13,321 INFO L226 Difference]: Without dead ends: 72001 [2021-11-03 05:47:13,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:47:13,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72001 states. [2021-11-03 05:47:14,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72001 to 12075. [2021-11-03 05:47:14,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12075 states, 12065 states have (on average 1.8895151263986738) internal successors, (22797), 12074 states have internal predecessors, (22797), 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) [2021-11-03 05:47:14,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12075 states to 12075 states and 22797 transitions. [2021-11-03 05:47:14,608 INFO L78 Accepts]: Start accepts. Automaton has 12075 states and 22797 transitions. Word has length 30 [2021-11-03 05:47:14,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:14,609 INFO L470 AbstractCegarLoop]: Abstraction has 12075 states and 22797 transitions. [2021-11-03 05:47:14,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 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) [2021-11-03 05:47:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand 12075 states and 22797 transitions. [2021-11-03 05:47:14,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-03 05:47:14,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:14,619 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] [2021-11-03 05:47:14,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-03 05:47:14,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:14,834 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:47:14,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:14,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1197617864, now seen corresponding path program 1 times [2021-11-03 05:47:14,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:14,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505234819] [2021-11-03 05:47:14,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:14,837 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:14,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:14,838 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:14,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:47:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:15,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:47:15,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:15,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:15,319 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:15,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505234819] [2021-11-03 05:47:15,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505234819] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:15,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:15,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:47:15,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506208311] [2021-11-03 05:47:15,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:47:15,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:15,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:47:15,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:47:15,323 INFO L87 Difference]: Start difference. First operand 12075 states and 22797 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-11-03 05:47:15,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:15,801 INFO L93 Difference]: Finished difference Result 24062 states and 45437 transitions. [2021-11-03 05:47:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:47:15,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 32 [2021-11-03 05:47:15,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:15,827 INFO L225 Difference]: With dead ends: 24062 [2021-11-03 05:47:15,827 INFO L226 Difference]: Without dead ends: 12001 [2021-11-03 05:47:15,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:47:15,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12001 states. [2021-11-03 05:47:16,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12001 to 12001. [2021-11-03 05:47:16,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12001 states, 11991 states have (on average 1.8891668751563673) internal successors, (22653), 12000 states have internal predecessors, (22653), 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) [2021-11-03 05:47:16,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12001 states to 12001 states and 22653 transitions. [2021-11-03 05:47:16,126 INFO L78 Accepts]: Start accepts. Automaton has 12001 states and 22653 transitions. Word has length 32 [2021-11-03 05:47:16,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:16,127 INFO L470 AbstractCegarLoop]: Abstraction has 12001 states and 22653 transitions. [2021-11-03 05:47:16,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-11-03 05:47:16,128 INFO L276 IsEmpty]: Start isEmpty. Operand 12001 states and 22653 transitions. [2021-11-03 05:47:16,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 05:47:16,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:16,136 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] [2021-11-03 05:47:16,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:16,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:16,356 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:47:16,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:16,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1967292650, now seen corresponding path program 1 times [2021-11-03 05:47:16,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:16,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430715812] [2021-11-03 05:47:16,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:16,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:16,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:16,359 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:16,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:47:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:16,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:47:16,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:16,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:16,971 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:16,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430715812] [2021-11-03 05:47:16,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430715812] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:16,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:16,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:47:16,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677598128] [2021-11-03 05:47:16,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:47:16,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:16,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:47:16,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:47:16,974 INFO L87 Difference]: Start difference. First operand 12001 states and 22653 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 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) [2021-11-03 05:47:17,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:17,702 INFO L93 Difference]: Finished difference Result 23976 states and 45269 transitions. [2021-11-03 05:47:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:47:17,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 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 34 [2021-11-03 05:47:17,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:17,730 INFO L225 Difference]: With dead ends: 23976 [2021-11-03 05:47:17,730 INFO L226 Difference]: Without dead ends: 12001 [2021-11-03 05:47:17,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-11-03 05:47:17,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12001 states. [2021-11-03 05:47:18,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12001 to 12001. [2021-11-03 05:47:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12001 states, 11991 states have (on average 1.8883329163539322) internal successors, (22643), 12000 states have internal predecessors, (22643), 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) [2021-11-03 05:47:18,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12001 states to 12001 states and 22643 transitions. [2021-11-03 05:47:18,196 INFO L78 Accepts]: Start accepts. Automaton has 12001 states and 22643 transitions. Word has length 34 [2021-11-03 05:47:18,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:18,197 INFO L470 AbstractCegarLoop]: Abstraction has 12001 states and 22643 transitions. [2021-11-03 05:47:18,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 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) [2021-11-03 05:47:18,197 INFO L276 IsEmpty]: Start isEmpty. Operand 12001 states and 22643 transitions. [2021-11-03 05:47:18,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-03 05:47:18,199 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:18,199 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] [2021-11-03 05:47:18,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:18,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:18,419 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:47:18,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:18,420 INFO L85 PathProgramCache]: Analyzing trace with hash 27334880, now seen corresponding path program 1 times [2021-11-03 05:47:18,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:18,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528036293] [2021-11-03 05:47:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:18,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:18,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:18,423 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:18,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:47:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:18,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:47:18,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:18,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:19,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:19,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528036293] [2021-11-03 05:47:19,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1528036293] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:19,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:19,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:47:19,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022026881] [2021-11-03 05:47:19,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:47:19,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:19,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:47:19,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:47:19,033 INFO L87 Difference]: Start difference. First operand 12001 states and 22643 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 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) [2021-11-03 05:47:25,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:25,609 INFO L93 Difference]: Finished difference Result 53388 states and 100337 transitions. [2021-11-03 05:47:25,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-03 05:47:25,610 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 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 38 [2021-11-03 05:47:25,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:25,704 INFO L225 Difference]: With dead ends: 53388 [2021-11-03 05:47:25,704 INFO L226 Difference]: Without dead ends: 41457 [2021-11-03 05:47:25,726 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-11-03 05:47:25,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41457 states. [2021-11-03 05:47:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41457 to 21288. [2021-11-03 05:47:26,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21288 states, 21278 states have (on average 1.8877244101889274) internal successors, (40167), 21287 states have internal predecessors, (40167), 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) [2021-11-03 05:47:26,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21288 states to 21288 states and 40167 transitions. [2021-11-03 05:47:26,761 INFO L78 Accepts]: Start accepts. Automaton has 21288 states and 40167 transitions. Word has length 38 [2021-11-03 05:47:26,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:26,761 INFO L470 AbstractCegarLoop]: Abstraction has 21288 states and 40167 transitions. [2021-11-03 05:47:26,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 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) [2021-11-03 05:47:26,761 INFO L276 IsEmpty]: Start isEmpty. Operand 21288 states and 40167 transitions. [2021-11-03 05:47:26,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-03 05:47:26,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:26,763 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] [2021-11-03 05:47:26,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:26,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:26,976 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:47:26,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:26,976 INFO L85 PathProgramCache]: Analyzing trace with hash -665379077, now seen corresponding path program 1 times [2021-11-03 05:47:26,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:26,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1227047193] [2021-11-03 05:47:26,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:26,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:26,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:26,980 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:27,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:47:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:27,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:47:27,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:27,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:27,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:27,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1227047193] [2021-11-03 05:47:27,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1227047193] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:27,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:27,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:47:27,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999338759] [2021-11-03 05:47:27,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:47:27,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:27,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:47:27,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:47:27,724 INFO L87 Difference]: Start difference. First operand 21288 states and 40167 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2021-11-03 05:47:34,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:34,108 INFO L93 Difference]: Finished difference Result 179289 states and 338516 transitions. [2021-11-03 05:47:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:47:34,109 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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 38 [2021-11-03 05:47:34,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:34,371 INFO L225 Difference]: With dead ends: 179289 [2021-11-03 05:47:34,371 INFO L226 Difference]: Without dead ends: 158071 [2021-11-03 05:47:34,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:47:34,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158071 states. [2021-11-03 05:47:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158071 to 40083. [2021-11-03 05:47:36,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40083 states, 40073 states have (on average 1.886731714620817) internal successors, (75607), 40082 states have internal predecessors, (75607), 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) [2021-11-03 05:47:36,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40083 states to 40083 states and 75607 transitions. [2021-11-03 05:47:36,727 INFO L78 Accepts]: Start accepts. Automaton has 40083 states and 75607 transitions. Word has length 38 [2021-11-03 05:47:36,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:36,728 INFO L470 AbstractCegarLoop]: Abstraction has 40083 states and 75607 transitions. [2021-11-03 05:47:36,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2021-11-03 05:47:36,728 INFO L276 IsEmpty]: Start isEmpty. Operand 40083 states and 75607 transitions. [2021-11-03 05:47:36,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-03 05:47:36,730 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:36,730 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] [2021-11-03 05:47:36,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-03 05:47:36,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:36,943 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:47:36,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:36,945 INFO L85 PathProgramCache]: Analyzing trace with hash 11022967, now seen corresponding path program 1 times [2021-11-03 05:47:36,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:36,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294980893] [2021-11-03 05:47:36,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:36,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:36,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:36,948 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:36,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:47:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:37,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:47:37,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:37,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:37,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:37,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294980893] [2021-11-03 05:47:37,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294980893] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:37,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:37,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:47:37,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612066413] [2021-11-03 05:47:37,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:47:37,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:37,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:47:37,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:47:37,502 INFO L87 Difference]: Start difference. First operand 40083 states and 75607 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2021-11-03 05:47:40,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:40,127 INFO L93 Difference]: Finished difference Result 119249 states and 224947 transitions. [2021-11-03 05:47:40,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:47:40,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 39 [2021-11-03 05:47:40,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:40,261 INFO L225 Difference]: With dead ends: 119249 [2021-11-03 05:47:40,261 INFO L226 Difference]: Without dead ends: 79198 [2021-11-03 05:47:40,291 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:47:40,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79198 states. [2021-11-03 05:47:41,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79198 to 39959. [2021-11-03 05:47:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39959 states, 39949 states have (on average 1.8863801346717064) internal successors, (75359), 39958 states have internal predecessors, (75359), 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) [2021-11-03 05:47:41,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39959 states to 39959 states and 75359 transitions. [2021-11-03 05:47:41,887 INFO L78 Accepts]: Start accepts. Automaton has 39959 states and 75359 transitions. Word has length 39 [2021-11-03 05:47:41,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:41,887 INFO L470 AbstractCegarLoop]: Abstraction has 39959 states and 75359 transitions. [2021-11-03 05:47:41,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2021-11-03 05:47:41,888 INFO L276 IsEmpty]: Start isEmpty. Operand 39959 states and 75359 transitions. [2021-11-03 05:47:41,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-03 05:47:41,889 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:41,889 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] [2021-11-03 05:47:41,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:42,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:42,111 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:47:42,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:42,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2063666708, now seen corresponding path program 1 times [2021-11-03 05:47:42,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:42,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913210779] [2021-11-03 05:47:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:42,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:42,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:42,114 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:42,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:47:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:42,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:47:42,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:42,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:42,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:42,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913210779] [2021-11-03 05:47:42,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913210779] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:42,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:42,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-03 05:47:42,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991020038] [2021-11-03 05:47:42,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:47:42,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:42,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:47:42,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:47:42,725 INFO L87 Difference]: Start difference. First operand 39959 states and 75359 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:55,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:47:55,495 INFO L93 Difference]: Finished difference Result 150790 states and 284103 transitions. [2021-11-03 05:47:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 05:47:55,496 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-03 05:47:55,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:47:55,672 INFO L225 Difference]: With dead ends: 150790 [2021-11-03 05:47:55,672 INFO L226 Difference]: Without dead ends: 110865 [2021-11-03 05:47:55,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:47:55,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110865 states. [2021-11-03 05:47:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110865 to 77865. [2021-11-03 05:47:58,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77865 states, 77855 states have (on average 1.8701046817802325) internal successors, (145597), 77864 states have internal predecessors, (145597), 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) [2021-11-03 05:47:58,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77865 states to 77865 states and 145597 transitions. [2021-11-03 05:47:58,491 INFO L78 Accepts]: Start accepts. Automaton has 77865 states and 145597 transitions. Word has length 39 [2021-11-03 05:47:58,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:47:58,491 INFO L470 AbstractCegarLoop]: Abstraction has 77865 states and 145597 transitions. [2021-11-03 05:47:58,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:47:58,492 INFO L276 IsEmpty]: Start isEmpty. Operand 77865 states and 145597 transitions. [2021-11-03 05:47:58,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 05:47:58,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:47:58,493 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] [2021-11-03 05:47:58,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:47:58,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:47:58,695 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-03 05:47:58,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:47:58,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2075324051, now seen corresponding path program 1 times [2021-11-03 05:47:58,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:47:58,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000845944] [2021-11-03 05:47:58,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:47:58,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:47:58,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:47:58,697 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:47:58,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1793e3d-c7d0-4171-be47-aaea3c681cfe/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:47:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:47:59,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:47:59,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:47:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:59,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:47:59,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:47:59,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:47:59,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000845944] [2021-11-03 05:47:59,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2000845944] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:47:59,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:47:59,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:47:59,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314890446] [2021-11-03 05:47:59,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:47:59,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:47:59,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:47:59,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:47:59,524 INFO L87 Difference]: Start difference. First operand 77865 states and 145597 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 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)