./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-newlib/float_req_bl_1231.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1231.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF --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 7acfe881669b731d03fc8aee9db955b71d947923db9c9de4e28fcb386b44b191 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:35:18,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:35:18,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:35:18,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:35:18,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:35:18,733 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:35:18,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:35:18,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:35:18,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:35:18,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:35:18,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:35:18,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:35:18,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:35:18,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:35:18,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:35:18,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:35:18,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:35:18,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:35:18,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:35:18,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:35:18,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:35:18,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:35:18,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:35:18,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:35:18,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:35:18,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:35:18,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:35:18,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:35:18,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:35:18,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:35:18,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:35:18,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:35:18,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:35:18,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:35:18,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:35:18,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:35:18,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:35:18,809 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:35:18,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:35:18,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:35:18,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:35:18,812 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:35:18,863 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:35:18,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:35:18,865 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:35:18,865 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:35:18,866 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:35:18,866 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:35:18,866 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:35:18,867 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:35:18,867 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:35:18,867 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:35:18,868 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:35:18,869 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:35:18,869 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:35:18,869 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:35:18,870 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:35:18,870 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:35:18,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:35:18,871 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:35:18,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:35:18,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:35:18,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:35:18,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:35:18,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:35:18,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:35:18,873 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:35:18,873 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:35:18,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:35:18,874 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:35:18,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:35:18,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:35:18,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:35:18,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:35:18,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:35:18,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:35:18,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:35:18,877 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:35:18,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:35:18,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:35:18,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:35:18,879 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:35:18,879 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_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7acfe881669b731d03fc8aee9db955b71d947923db9c9de4e28fcb386b44b191 [2021-11-12 22:35:19,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:35:19,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:35:19,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:35:19,269 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:35:19,270 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:35:19,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/float-newlib/float_req_bl_1231.c [2021-11-12 22:35:19,348 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/data/237e62ed6/6cc52c581755455f9a56044342efa4d9/FLAG8c07ddef1 [2021-11-12 22:35:19,925 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:35:19,926 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/sv-benchmarks/c/float-newlib/float_req_bl_1231.c [2021-11-12 22:35:19,943 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/data/237e62ed6/6cc52c581755455f9a56044342efa4d9/FLAG8c07ddef1 [2021-11-12 22:35:20,245 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/data/237e62ed6/6cc52c581755455f9a56044342efa4d9 [2021-11-12 22:35:20,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:35:20,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:35:20,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:35:20,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:35:20,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:35:20,259 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:35:20" (1/1) ... [2021-11-12 22:35:20,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@309c0ea9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:20, skipping insertion in model container [2021-11-12 22:35:20,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:35:20" (1/1) ... [2021-11-12 22:35:20,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:35:20,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:35:20,539 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_a9fad04f-fd05-40b2-8a86-c3b03816a43f/sv-benchmarks/c/float-newlib/float_req_bl_1231.c[1835,1848] [2021-11-12 22:35:20,544 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_a9fad04f-fd05-40b2-8a86-c3b03816a43f/sv-benchmarks/c/float-newlib/float_req_bl_1231.c[1994,2007] [2021-11-12 22:35:20,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:35:20,554 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:35:20,584 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_a9fad04f-fd05-40b2-8a86-c3b03816a43f/sv-benchmarks/c/float-newlib/float_req_bl_1231.c[1835,1848] [2021-11-12 22:35:20,585 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_a9fad04f-fd05-40b2-8a86-c3b03816a43f/sv-benchmarks/c/float-newlib/float_req_bl_1231.c[1994,2007] [2021-11-12 22:35:20,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:35:20,600 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:35:20,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:20 WrapperNode [2021-11-12 22:35:20,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:35:20,602 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:35:20,602 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:35:20,602 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:35:20,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:20" (1/1) ... [2021-11-12 22:35:20,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:20" (1/1) ... [2021-11-12 22:35:20,648 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:35:20,649 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:35:20,649 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:35:20,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:35:20,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:20" (1/1) ... [2021-11-12 22:35:20,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:20" (1/1) ... [2021-11-12 22:35:20,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:20" (1/1) ... [2021-11-12 22:35:20,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:20" (1/1) ... [2021-11-12 22:35:20,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:20" (1/1) ... [2021-11-12 22:35:20,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:20" (1/1) ... [2021-11-12 22:35:20,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:20" (1/1) ... [2021-11-12 22:35:20,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:35:20,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:35:20,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:35:20,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:35:20,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:20" (1/1) ... [2021-11-12 22:35:20,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:35:20,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:20,736 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:35:20,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:35:20,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:35:20,790 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-11-12 22:35:20,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-11-12 22:35:20,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:35:20,791 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-11-12 22:35:20,791 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-11-12 22:35:20,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-11-12 22:35:20,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:35:20,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:35:20,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-12 22:35:20,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:35:21,461 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:35:21,462 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 22:35:21,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:35:21 BoogieIcfgContainer [2021-11-12 22:35:21,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:35:21,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:35:21,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:35:21,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:35:21,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:35:20" (1/3) ... [2021-11-12 22:35:21,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3e7a09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:35:21, skipping insertion in model container [2021-11-12 22:35:21,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:20" (2/3) ... [2021-11-12 22:35:21,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c3e7a09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:35:21, skipping insertion in model container [2021-11-12 22:35:21,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:35:21" (3/3) ... [2021-11-12 22:35:21,487 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1231.c [2021-11-12 22:35:21,493 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:35:21,493 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 22:35:21,576 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:35:21,588 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 [2021-11-12 22:35:21,589 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 22:35:21,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 32 states have (on average 1.40625) internal successors, (45), 34 states have internal predecessors, (45), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-12 22:35:21,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-12 22:35:21,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:21,641 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:21,642 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:21,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:21,649 INFO L85 PathProgramCache]: Analyzing trace with hash -748214862, now seen corresponding path program 1 times [2021-11-12 22:35:21,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:35:21,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307567857] [2021-11-12 22:35:21,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:21,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:35:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:35:21,924 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:35:21,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307567857] [2021-11-12 22:35:21,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307567857] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:35:21,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:35:21,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:35:21,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886043233] [2021-11-12 22:35:21,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:21,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:35:21,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:35:21,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:35:21,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:35:21,971 INFO L87 Difference]: Start difference. First operand has 47 states, 32 states have (on average 1.40625) internal successors, (45), 34 states have internal predecessors, (45), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 22:35:22,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:22,068 INFO L93 Difference]: Finished difference Result 89 states and 125 transitions. [2021-11-12 22:35:22,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:35:22,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-11-12 22:35:22,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:22,081 INFO L225 Difference]: With dead ends: 89 [2021-11-12 22:35:22,081 INFO L226 Difference]: Without dead ends: 53 [2021-11-12 22:35:22,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:35:22,089 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 16 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.91ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.33ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:22,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 151 Invalid, 37 Unknown, 0 Unchecked, 3.91ms Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 48.33ms Time] [2021-11-12 22:35:22,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-12 22:35:22,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2021-11-12 22:35:22,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-12 22:35:22,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2021-11-12 22:35:22,143 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 24 [2021-11-12 22:35:22,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:22,143 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2021-11-12 22:35:22,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-12 22:35:22,144 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2021-11-12 22:35:22,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-12 22:35:22,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:22,147 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:22,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:35:22,148 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:22,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:22,149 INFO L85 PathProgramCache]: Analyzing trace with hash 2067969382, now seen corresponding path program 1 times [2021-11-12 22:35:22,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:35:22,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630246768] [2021-11-12 22:35:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:22,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:35:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:35:22,240 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:35:22,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630246768] [2021-11-12 22:35:22,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630246768] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:35:22,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:35:22,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:35:22,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739849267] [2021-11-12 22:35:22,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:22,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:35:22,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:35:22,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:35:22,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:35:22,245 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:35:22,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:22,271 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2021-11-12 22:35:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:35:22,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-11-12 22:35:22,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:22,273 INFO L225 Difference]: With dead ends: 49 [2021-11-12 22:35:22,274 INFO L226 Difference]: Without dead ends: 47 [2021-11-12 22:35:22,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:35:22,276 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.45ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.41ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:22,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 99 Invalid, 14 Unknown, 0 Unchecked, 1.45ms Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 17.41ms Time] [2021-11-12 22:35:22,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-12 22:35:22,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-12 22:35:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-12 22:35:22,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2021-11-12 22:35:22,289 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 29 [2021-11-12 22:35:22,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:22,289 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2021-11-12 22:35:22,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:35:22,290 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2021-11-12 22:35:22,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-12 22:35:22,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:22,292 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:22,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 22:35:22,293 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:22,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:22,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1273851335, now seen corresponding path program 1 times [2021-11-12 22:35:22,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:35:22,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3107984] [2021-11-12 22:35:22,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:22,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:35:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:35:22,360 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 22:35:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 22:35:22,508 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-12 22:35:22,508 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 22:35:22,510 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-12 22:35:22,512 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-12 22:35:22,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 22:35:22,516 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-11-12 22:35:22,520 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 22:35:22,550 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-12 22:35:22,562 INFO L158 Benchmark]: Toolchain (without parser) took 2311.52ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 67.4MB in the beginning and 62.8MB in the end (delta: 4.6MB). Peak memory consumption was 24.7MB. Max. memory is 16.1GB. [2021-11-12 22:35:22,562 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 98.6MB. Free memory is still 50.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:35:22,563 INFO L158 Benchmark]: CACSL2BoogieTranslator took 347.20ms. Allocated memory is still 98.6MB. Free memory was 67.2MB in the beginning and 73.9MB in the end (delta: -6.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-12 22:35:22,564 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.06ms. Allocated memory is still 98.6MB. Free memory was 73.9MB in the beginning and 72.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:35:22,565 INFO L158 Benchmark]: Boogie Preprocessor took 34.93ms. Allocated memory is still 98.6MB. Free memory was 72.2MB in the beginning and 70.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:35:22,565 INFO L158 Benchmark]: RCFGBuilder took 787.48ms. Allocated memory is still 98.6MB. Free memory was 70.8MB in the beginning and 54.7MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-11-12 22:35:22,567 INFO L158 Benchmark]: TraceAbstraction took 1086.15ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 54.0MB in the beginning and 62.8MB in the end (delta: -8.8MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. [2021-11-12 22:35:22,571 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 98.6MB. Free memory is still 50.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 347.20ms. Allocated memory is still 98.6MB. Free memory was 67.2MB in the beginning and 73.9MB in the end (delta: -6.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.06ms. Allocated memory is still 98.6MB. Free memory was 73.9MB in the beginning and 72.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 34.93ms. Allocated memory is still 98.6MB. Free memory was 72.2MB in the beginning and 70.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 787.48ms. Allocated memory is still 98.6MB. Free memory was 70.8MB in the beginning and 54.7MB in the end (delta: 16.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 1086.15ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 54.0MB in the beginning and 62.8MB in the end (delta: -8.8MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-12 22:35:22,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 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_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-newlib/float_req_bl_1231.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF --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 7acfe881669b731d03fc8aee9db955b71d947923db9c9de4e28fcb386b44b191 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:35:25,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:35:25,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:35:25,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:35:25,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:35:25,536 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:35:25,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:35:25,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:35:25,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:35:25,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:35:25,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:35:25,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:35:25,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:35:25,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:35:25,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:35:25,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:35:25,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:35:25,574 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:35:25,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:35:25,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:35:25,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:35:25,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:35:25,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:35:25,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:35:25,607 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:35:25,608 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:35:25,608 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:35:25,611 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:35:25,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:35:25,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:35:25,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:35:25,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:35:25,617 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:35:25,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:35:25,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:35:25,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:35:25,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:35:25,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:35:25,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:35:25,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:35:25,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:35:25,631 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 22:35:25,680 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:35:25,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:35:25,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:35:25,682 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:35:25,683 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:35:25,683 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:35:25,683 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:35:25,683 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:35:25,684 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:35:25,684 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:35:25,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:35:25,687 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:35:25,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:35:25,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:35:25,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:35:25,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:35:25,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:35:25,688 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:35:25,689 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:35:25,689 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:35:25,689 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:35:25,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:35:25,690 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:35:25,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:35:25,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:35:25,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:35:25,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:35:25,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:35:25,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:35:25,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:35:25,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:35:25,692 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:35:25,692 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:35:25,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:35:25,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:35:25,694 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:35:25,694 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_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7acfe881669b731d03fc8aee9db955b71d947923db9c9de4e28fcb386b44b191 [2021-11-12 22:35:26,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:35:26,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:35:26,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:35:26,168 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:35:26,169 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:35:26,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/float-newlib/float_req_bl_1231.c [2021-11-12 22:35:26,259 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/data/6752f406b/35d4433daaa846cb9e1bc9f6da1f98c7/FLAG7b5bdb073 [2021-11-12 22:35:26,942 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:35:26,946 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/sv-benchmarks/c/float-newlib/float_req_bl_1231.c [2021-11-12 22:35:26,955 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/data/6752f406b/35d4433daaa846cb9e1bc9f6da1f98c7/FLAG7b5bdb073 [2021-11-12 22:35:27,270 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/data/6752f406b/35d4433daaa846cb9e1bc9f6da1f98c7 [2021-11-12 22:35:27,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:35:27,275 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:35:27,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:35:27,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:35:27,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:35:27,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:35:27" (1/1) ... [2021-11-12 22:35:27,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5396de59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:27, skipping insertion in model container [2021-11-12 22:35:27,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:35:27" (1/1) ... [2021-11-12 22:35:27,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:35:27,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:35:27,593 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_a9fad04f-fd05-40b2-8a86-c3b03816a43f/sv-benchmarks/c/float-newlib/float_req_bl_1231.c[1835,1848] [2021-11-12 22:35:27,597 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_a9fad04f-fd05-40b2-8a86-c3b03816a43f/sv-benchmarks/c/float-newlib/float_req_bl_1231.c[1994,2007] [2021-11-12 22:35:27,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:35:27,615 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:35:27,677 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_a9fad04f-fd05-40b2-8a86-c3b03816a43f/sv-benchmarks/c/float-newlib/float_req_bl_1231.c[1835,1848] [2021-11-12 22:35:27,678 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_a9fad04f-fd05-40b2-8a86-c3b03816a43f/sv-benchmarks/c/float-newlib/float_req_bl_1231.c[1994,2007] [2021-11-12 22:35:27,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:35:27,699 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:35:27,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:27 WrapperNode [2021-11-12 22:35:27,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:35:27,701 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:35:27,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:35:27,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:35:27,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:27" (1/1) ... [2021-11-12 22:35:27,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:27" (1/1) ... [2021-11-12 22:35:27,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:35:27,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:35:27,766 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:35:27,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:35:27,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:27" (1/1) ... [2021-11-12 22:35:27,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:27" (1/1) ... [2021-11-12 22:35:27,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:27" (1/1) ... [2021-11-12 22:35:27,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:27" (1/1) ... [2021-11-12 22:35:27,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:27" (1/1) ... [2021-11-12 22:35:27,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:27" (1/1) ... [2021-11-12 22:35:27,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:27" (1/1) ... [2021-11-12 22:35:27,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:35:27,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:35:27,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:35:27,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:35:27,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:27" (1/1) ... [2021-11-12 22:35:27,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:35:27,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:27,893 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:35:27,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:35:27,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:35:27,946 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2021-11-12 22:35:27,948 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2021-11-12 22:35:27,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:35:27,949 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-11-12 22:35:27,949 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-11-12 22:35:27,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:35:27,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:35:27,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:35:27,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2021-11-12 22:35:27,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:35:28,412 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:35:28,417 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-12 22:35:28,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:35:28 BoogieIcfgContainer [2021-11-12 22:35:28,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:35:28,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:35:28,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:35:28,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:35:28,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:35:27" (1/3) ... [2021-11-12 22:35:28,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2129230e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:35:28, skipping insertion in model container [2021-11-12 22:35:28,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:35:27" (2/3) ... [2021-11-12 22:35:28,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2129230e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:35:28, skipping insertion in model container [2021-11-12 22:35:28,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:35:28" (3/3) ... [2021-11-12 22:35:28,429 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1231.c [2021-11-12 22:35:28,436 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:35:28,436 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-12 22:35:28,502 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:35:28,514 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 [2021-11-12 22:35:28,514 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-12 22:35:28,548 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 40 states have (on average 1.475) internal successors, (59), 42 states have internal predecessors, (59), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-12 22:35:28,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-12 22:35:28,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:28,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:28,556 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:28,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:28,563 INFO L85 PathProgramCache]: Analyzing trace with hash 956195031, now seen corresponding path program 1 times [2021-11-12 22:35:28,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:35:28,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673858049] [2021-11-12 22:35:28,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:28,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:35:28,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:35:28,583 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:35:28,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:35:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:28,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 22:35:28,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:35:28,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:35:28,946 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:35:28,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673858049] [2021-11-12 22:35:28,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673858049] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:35:28,948 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:35:28,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:35:28,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92221766] [2021-11-12 22:35:28,951 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:28,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 22:35:28,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:35:28,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 22:35:28,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:35:28,992 INFO L87 Difference]: Start difference. First operand has 55 states, 40 states have (on average 1.475) internal successors, (59), 42 states have internal predecessors, (59), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 22:35:29,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:29,022 INFO L93 Difference]: Finished difference Result 93 states and 134 transitions. [2021-11-12 22:35:29,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 22:35:29,025 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-11-12 22:35:29,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:29,035 INFO L225 Difference]: With dead ends: 93 [2021-11-12 22:35:29,035 INFO L226 Difference]: Without dead ends: 51 [2021-11-12 22:35:29,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 22:35:29,044 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.69ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:29,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 1.69ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 22:35:29,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-12 22:35:29,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-12 22:35:29,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 38 states have internal predecessors, (50), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-12 22:35:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2021-11-12 22:35:29,098 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 27 [2021-11-12 22:35:29,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:29,100 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2021-11-12 22:35:29,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-12 22:35:29,101 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2021-11-12 22:35:29,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-12 22:35:29,104 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:29,105 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:29,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:29,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:35:29,320 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:29,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:29,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1128254016, now seen corresponding path program 1 times [2021-11-12 22:35:29,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:35:29,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060282120] [2021-11-12 22:35:29,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:29,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:35:29,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:35:29,329 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:35:29,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:35:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:29,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:35:29,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:35:29,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:35:29,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:35:29,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060282120] [2021-11-12 22:35:29,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060282120] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:35:29,629 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:35:29,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 22:35:29,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423067354] [2021-11-12 22:35:29,631 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:29,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:35:29,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:35:29,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:35:29,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:35:29,635 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:35:29,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:29,717 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2021-11-12 22:35:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:35:29,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2021-11-12 22:35:29,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:29,722 INFO L225 Difference]: With dead ends: 96 [2021-11-12 22:35:29,723 INFO L226 Difference]: Without dead ends: 60 [2021-11-12 22:35:29,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:35:29,727 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 16 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.89ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:29,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 191 Invalid, 18 Unknown, 0 Unchecked, 3.89ms Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 54.95ms Time] [2021-11-12 22:35:29,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-12 22:35:29,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2021-11-12 22:35:29,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 40 states have internal predecessors, (52), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-12 22:35:29,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2021-11-12 22:35:29,769 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 28 [2021-11-12 22:35:29,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:29,771 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2021-11-12 22:35:29,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-12 22:35:29,772 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2021-11-12 22:35:29,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-12 22:35:29,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:29,776 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:29,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 22:35:29,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:35:29,988 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:29,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:29,988 INFO L85 PathProgramCache]: Analyzing trace with hash 987158491, now seen corresponding path program 1 times [2021-11-12 22:35:29,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:35:29,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [915468203] [2021-11-12 22:35:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:29,990 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:35:29,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:35:29,997 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:35:29,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:35:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:30,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:35:30,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:35:30,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:35:30,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:35:30,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [915468203] [2021-11-12 22:35:30,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [915468203] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:35:30,310 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:35:30,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:35:30,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500082295] [2021-11-12 22:35:30,313 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:30,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:35:30,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:35:30,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:35:30,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:35:30,316 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 22:35:30,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:30,387 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2021-11-12 22:35:30,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:35:30,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 33 [2021-11-12 22:35:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:30,394 INFO L225 Difference]: With dead ends: 79 [2021-11-12 22:35:30,394 INFO L226 Difference]: Without dead ends: 59 [2021-11-12 22:35:30,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:35:30,399 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.73ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.35ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:30,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 330 Invalid, 18 Unknown, 0 Unchecked, 10.73ms Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 23.35ms Time] [2021-11-12 22:35:30,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-12 22:35:30,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-11-12 22:35:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-12 22:35:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2021-11-12 22:35:30,430 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 33 [2021-11-12 22:35:30,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:30,430 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2021-11-12 22:35:30,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-12 22:35:30,431 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2021-11-12 22:35:30,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-12 22:35:30,436 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:30,437 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:30,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:30,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:35:30,651 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:30,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:30,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1662589572, now seen corresponding path program 1 times [2021-11-12 22:35:30,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:35:30,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583836022] [2021-11-12 22:35:30,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:30,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:35:30,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:35:30,655 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:35:30,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:35:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:30,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:35:30,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:31,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:35:31,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-12 22:35:31,830 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:35:31,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583836022] [2021-11-12 22:35:31,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583836022] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:31,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1320020247] [2021-11-12 22:35:31,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:31,831 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:35:31,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:35:31,836 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:35:31,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-12 22:35:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:32,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:35:32,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:35:32,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:35:32,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1320020247] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:35:32,264 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:35:32,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8, 9] total 14 [2021-11-12 22:35:32,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123481727] [2021-11-12 22:35:32,265 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:32,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:35:32,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:35:32,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:35:32,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:35:32,267 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:35:32,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:32,282 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2021-11-12 22:35:32,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:35:32,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2021-11-12 22:35:32,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:32,285 INFO L225 Difference]: With dead ends: 59 [2021-11-12 22:35:32,285 INFO L226 Difference]: Without dead ends: 57 [2021-11-12 22:35:32,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:35:32,287 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.17ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.43ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:32,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 132 Invalid, 7 Unknown, 0 Unchecked, 1.17ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 8.43ms Time] [2021-11-12 22:35:32,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-12 22:35:32,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-12 22:35:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 43 states have internal predecessors, (55), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-12 22:35:32,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2021-11-12 22:35:32,297 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 36 [2021-11-12 22:35:32,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:32,298 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2021-11-12 22:35:32,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:35:32,299 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2021-11-12 22:35:32,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-12 22:35:32,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:32,301 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:32,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-11-12 22:35:32,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:32,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:35:32,711 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:32,712 INFO L85 PathProgramCache]: Analyzing trace with hash -490349503, now seen corresponding path program 1 times [2021-11-12 22:35:32,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:35:32,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1696355868] [2021-11-12 22:35:32,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:32,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:35:32,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:35:32,716 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:35:32,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:35:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:32,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:35:32,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:35:33,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:35:33,945 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:35:33,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1696355868] [2021-11-12 22:35:33,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1696355868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:33,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [608752400] [2021-11-12 22:35:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:33,946 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:35:33,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:35:33,947 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:35:33,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-12 22:35:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:34,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:35:34,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:35:34,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:35:34,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [608752400] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:34,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575636839] [2021-11-12 22:35:34,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:34,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:34,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:34,937 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:35:34,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-12 22:35:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:35,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:35:35,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:35:35,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:35:36,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575636839] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:35:36,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:35:36,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 10, 9, 9, 10] total 29 [2021-11-12 22:35:36,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653902961] [2021-11-12 22:35:36,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:36,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:35:36,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:35:36,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:35:36,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:35:36,169 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-12 22:35:36,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:36,960 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2021-11-12 22:35:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:35:36,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2021-11-12 22:35:36,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:36,963 INFO L225 Difference]: With dead ends: 75 [2021-11-12 22:35:36,963 INFO L226 Difference]: Without dead ends: 73 [2021-11-12 22:35:36,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-11-12 22:35:36,965 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 52 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 389.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.33ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 433.44ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:36,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 333 Invalid, 161 Unknown, 0 Unchecked, 4.33ms Time], IncrementalHoareTripleChecker [17 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 433.44ms Time] [2021-11-12 22:35:36,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-12 22:35:36,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2021-11-12 22:35:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 47 states have internal predecessors, (60), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (14), 13 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-12 22:35:36,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2021-11-12 22:35:36,976 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 41 [2021-11-12 22:35:36,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:36,977 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2021-11-12 22:35:36,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-12 22:35:36,978 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2021-11-12 22:35:36,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-12 22:35:36,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:36,980 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:37,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:37,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-12 22:35:37,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:37,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:35:37,608 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:37,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:37,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1869413518, now seen corresponding path program 1 times [2021-11-12 22:35:37,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:35:37,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633987041] [2021-11-12 22:35:37,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:37,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:35:37,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:35:37,610 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:35:37,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:35:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:37,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:35:37,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:35:38,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:35:38,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:35:38,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633987041] [2021-11-12 22:35:38,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633987041] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:38,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [644719226] [2021-11-12 22:35:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:38,470 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:35:38,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:35:38,475 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:35:38,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 22:35:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:38,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:35:38,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:35:38,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:35:38,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [644719226] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:35:38,906 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:35:38,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8, 9] total 14 [2021-11-12 22:35:38,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140415680] [2021-11-12 22:35:38,911 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:38,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:35:38,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:35:38,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:35:38,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:35:38,913 INFO L87 Difference]: Start difference. First operand 63 states and 86 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-12 22:35:38,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:38,926 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2021-11-12 22:35:38,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:35:38,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-11-12 22:35:38,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:38,936 INFO L225 Difference]: With dead ends: 66 [2021-11-12 22:35:38,936 INFO L226 Difference]: Without dead ends: 63 [2021-11-12 22:35:38,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:35:38,939 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.07ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.06ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:38,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 134 Invalid, 5 Unknown, 0 Unchecked, 1.07ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 7.06ms Time] [2021-11-12 22:35:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-12 22:35:38,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-12 22:35:38,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 47 states have internal predecessors, (59), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (14), 13 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-12 22:35:38,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2021-11-12 22:35:38,964 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 43 [2021-11-12 22:35:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:38,964 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2021-11-12 22:35:38,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-12 22:35:38,965 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2021-11-12 22:35:38,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-12 22:35:38,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:38,972 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:38,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:39,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:39,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:35:39,375 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:39,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:39,375 INFO L85 PathProgramCache]: Analyzing trace with hash 972082008, now seen corresponding path program 1 times [2021-11-12 22:35:39,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:35:39,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [947248074] [2021-11-12 22:35:39,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:39,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:35:39,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:35:39,377 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:35:39,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:35:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:39,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:35:39,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:39,577 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:35:39,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:35:39,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:35:39,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [947248074] [2021-11-12 22:35:39,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [947248074] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:35:39,708 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:35:39,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:35:39,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344601340] [2021-11-12 22:35:39,709 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:39,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:35:39,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:35:39,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:35:39,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:35:39,711 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:35:39,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:39,751 INFO L93 Difference]: Finished difference Result 88 states and 116 transitions. [2021-11-12 22:35:39,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:35:39,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 46 [2021-11-12 22:35:39,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:39,753 INFO L225 Difference]: With dead ends: 88 [2021-11-12 22:35:39,753 INFO L226 Difference]: Without dead ends: 67 [2021-11-12 22:35:39,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:35:39,754 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.94ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.55ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:39,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 198 Invalid, 13 Unknown, 0 Unchecked, 1.94ms Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 29.55ms Time] [2021-11-12 22:35:39,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-12 22:35:39,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2021-11-12 22:35:39,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 47 states have internal predecessors, (60), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (14), 14 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-12 22:35:39,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2021-11-12 22:35:39,775 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 46 [2021-11-12 22:35:39,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:39,776 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2021-11-12 22:35:39,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-12 22:35:39,777 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2021-11-12 22:35:39,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-12 22:35:39,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:39,779 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:39,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:39,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:35:39,991 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:39,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:39,991 INFO L85 PathProgramCache]: Analyzing trace with hash -877982242, now seen corresponding path program 1 times [2021-11-12 22:35:39,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:35:39,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208638855] [2021-11-12 22:35:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:39,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:35:39,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:35:39,993 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:35:39,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:35:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:40,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:35:40,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:35:40,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:35:41,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:35:41,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208638855] [2021-11-12 22:35:41,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208638855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:41,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2074670052] [2021-11-12 22:35:41,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:41,095 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:35:41,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:35:41,096 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:35:41,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 22:35:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:41,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:35:41,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:35:41,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:35:41,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2074670052] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:41,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743438705] [2021-11-12 22:35:41,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:41,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:41,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:41,951 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:35:41,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 22:35:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:42,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:35:42,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-12 22:35:42,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:35:43,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743438705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:43,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:35:43,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 18 [2021-11-12 22:35:43,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902467587] [2021-11-12 22:35:43,179 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:35:43,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 22:35:43,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:35:43,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 22:35:43,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-12 22:35:43,182 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 15 states have internal predecessors, (59), 9 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (19), 11 states have call predecessors, (19), 9 states have call successors, (19) [2021-11-12 22:35:43,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:43,796 INFO L93 Difference]: Finished difference Result 111 states and 149 transitions. [2021-11-12 22:35:43,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 22:35:43,796 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 15 states have internal predecessors, (59), 9 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (19), 11 states have call predecessors, (19), 9 states have call successors, (19) Word has length 48 [2021-11-12 22:35:43,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:43,798 INFO L225 Difference]: With dead ends: 111 [2021-11-12 22:35:43,798 INFO L226 Difference]: Without dead ends: 89 [2021-11-12 22:35:43,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-11-12 22:35:43,799 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 47 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 412.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.36ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 458.56ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:43,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 531 Invalid, 278 Unknown, 0 Unchecked, 4.36ms Time], IncrementalHoareTripleChecker [5 Valid, 133 Invalid, 0 Unknown, 140 Unchecked, 458.56ms Time] [2021-11-12 22:35:43,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-12 22:35:43,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2021-11-12 22:35:43,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 57 states have (on average 1.263157894736842) internal successors, (72), 55 states have internal predecessors, (72), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (19), 19 states have call predecessors, (19), 15 states have call successors, (19) [2021-11-12 22:35:43,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 106 transitions. [2021-11-12 22:35:43,810 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 106 transitions. Word has length 48 [2021-11-12 22:35:43,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:43,811 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 106 transitions. [2021-11-12 22:35:43,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 15 states have internal predecessors, (59), 9 states have call successors, (17), 2 states have call predecessors, (17), 5 states have return successors, (19), 11 states have call predecessors, (19), 9 states have call successors, (19) [2021-11-12 22:35:43,811 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 106 transitions. [2021-11-12 22:35:43,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-12 22:35:43,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:43,812 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:43,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:44,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:44,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-12 22:35:44,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:44,416 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:44,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1899050596, now seen corresponding path program 1 times [2021-11-12 22:35:44,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:35:44,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96240784] [2021-11-12 22:35:44,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:44,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:35:44,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:35:44,418 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:35:44,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:35:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:44,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:35:44,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:35:45,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-12 22:35:45,780 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:35:45,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96240784] [2021-11-12 22:35:45,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96240784] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:35:45,780 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:35:45,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 17 [2021-11-12 22:35:45,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908049302] [2021-11-12 22:35:45,781 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:35:45,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-12 22:35:45,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:35:45,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-12 22:35:45,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:35:45,782 INFO L87 Difference]: Start difference. First operand 77 states and 106 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-12 22:35:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:47,461 INFO L93 Difference]: Finished difference Result 125 states and 165 transitions. [2021-11-12 22:35:47,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:35:47,462 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 48 [2021-11-12 22:35:47,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:47,464 INFO L225 Difference]: With dead ends: 125 [2021-11-12 22:35:47,464 INFO L226 Difference]: Without dead ends: 123 [2021-11-12 22:35:47,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:35:47,466 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 99 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1224.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.02ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1284.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:47,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 938 Invalid, 358 Unknown, 0 Unchecked, 7.02ms Time], IncrementalHoareTripleChecker [22 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 1284.08ms Time] [2021-11-12 22:35:47,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-12 22:35:47,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 84. [2021-11-12 22:35:47,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.253968253968254) internal successors, (79), 60 states have internal predecessors, (79), 15 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (23), 21 states have call predecessors, (23), 15 states have call successors, (23) [2021-11-12 22:35:47,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2021-11-12 22:35:47,480 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 48 [2021-11-12 22:35:47,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:47,481 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2021-11-12 22:35:47,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-12 22:35:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2021-11-12 22:35:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-12 22:35:47,482 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:47,483 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:47,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:47,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:35:47,695 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:47,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:47,695 INFO L85 PathProgramCache]: Analyzing trace with hash 2112773896, now seen corresponding path program 1 times [2021-11-12 22:35:47,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:35:47,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331317334] [2021-11-12 22:35:47,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:47,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:35:47,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:35:47,699 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:35:47,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:35:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:47,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:35:47,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:35:48,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:35:48,551 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:35:48,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331317334] [2021-11-12 22:35:48,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331317334] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:48,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [757751642] [2021-11-12 22:35:48,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:48,552 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:35:48,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:35:48,553 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:35:48,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 22:35:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:48,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:35:48,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:35:49,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:35:49,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [757751642] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:49,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115718200] [2021-11-12 22:35:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:49,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:49,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:49,807 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:35:49,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-12 22:35:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:49,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 22:35:49,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:35:50,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:35:50,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115718200] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:50,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:35:50,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9, 10, 12, 12] total 27 [2021-11-12 22:35:50,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970872123] [2021-11-12 22:35:50,838 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:35:50,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-12 22:35:50,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:35:50,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-12 22:35:50,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-11-12 22:35:50,841 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 17 states have internal predecessors, (67), 4 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (21), 14 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 22:35:52,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:35:52,465 INFO L93 Difference]: Finished difference Result 169 states and 231 transitions. [2021-11-12 22:35:52,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-12 22:35:52,466 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 17 states have internal predecessors, (67), 4 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (21), 14 states have call predecessors, (21), 4 states have call successors, (21) Word has length 48 [2021-11-12 22:35:52,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:35:52,468 INFO L225 Difference]: With dead ends: 169 [2021-11-12 22:35:52,468 INFO L226 Difference]: Without dead ends: 136 [2021-11-12 22:35:52,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=268, Invalid=1454, Unknown=0, NotChecked=0, Total=1722 [2021-11-12 22:35:52,471 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 239 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 794.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.02ms SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 892.21ms IncrementalHoareTripleChecker+Time [2021-11-12 22:35:52,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 1151 Invalid, 697 Unknown, 0 Unchecked, 9.02ms Time], IncrementalHoareTripleChecker [124 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 892.21ms Time] [2021-11-12 22:35:52,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-12 22:35:52,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 115. [2021-11-12 22:35:52,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 82 states have internal predecessors, (104), 23 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (34), 30 states have call predecessors, (34), 23 states have call successors, (34) [2021-11-12 22:35:52,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 161 transitions. [2021-11-12 22:35:52,491 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 161 transitions. Word has length 48 [2021-11-12 22:35:52,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:35:52,492 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 161 transitions. [2021-11-12 22:35:52,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 17 states have internal predecessors, (67), 4 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (21), 14 states have call predecessors, (21), 4 states have call successors, (21) [2021-11-12 22:35:52,492 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 161 transitions. [2021-11-12 22:35:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-12 22:35:52,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:35:52,494 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:35:52,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:52,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:52,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:35:53,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:35:53,111 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:35:53,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:35:53,112 INFO L85 PathProgramCache]: Analyzing trace with hash 113915812, now seen corresponding path program 1 times [2021-11-12 22:35:53,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:35:53,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468426717] [2021-11-12 22:35:53,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:53,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:35:53,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:35:53,113 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:35:53,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:35:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:53,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:35:53,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:35:54,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:35:54,451 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:35:54,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468426717] [2021-11-12 22:35:54,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468426717] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:54,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [47596899] [2021-11-12 22:35:54,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:54,451 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:35:54,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:35:54,454 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:35:54,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 22:35:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:54,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:35:54,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:35:55,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:35:55,420 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:35:55,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [47596899] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:35:55,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60121671] [2021-11-12 22:35:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:35:55,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:35:55,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:35:55,422 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:35:55,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-12 22:35:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:35:55,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 22:35:55,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:35:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:35:59,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:36:01,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60121671] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:36:01,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-12 22:36:01,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [11, 11, 10, 10, 15] total 41 [2021-11-12 22:36:01,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925106641] [2021-11-12 22:36:01,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:01,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:36:01,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:01,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:36:01,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2021-11-12 22:36:01,247 INFO L87 Difference]: Start difference. First operand 115 states and 161 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:36:02,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:02,151 INFO L93 Difference]: Finished difference Result 147 states and 205 transitions. [2021-11-12 22:36:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-12 22:36:02,151 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2021-11-12 22:36:02,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:02,153 INFO L225 Difference]: With dead ends: 147 [2021-11-12 22:36:02,153 INFO L226 Difference]: Without dead ends: 135 [2021-11-12 22:36:02,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 248 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=255, Invalid=2001, Unknown=0, NotChecked=0, Total=2256 [2021-11-12 22:36:02,155 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 50 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 377.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.35ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 441.59ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:02,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 512 Invalid, 302 Unknown, 0 Unchecked, 3.35ms Time], IncrementalHoareTripleChecker [19 Valid, 175 Invalid, 0 Unknown, 108 Unchecked, 441.59ms Time] [2021-11-12 22:36:02,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-12 22:36:02,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2021-11-12 22:36:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 74 states have internal predecessors, (92), 23 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (28), 27 states have call predecessors, (28), 23 states have call successors, (28) [2021-11-12 22:36:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 143 transitions. [2021-11-12 22:36:02,171 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 143 transitions. Word has length 49 [2021-11-12 22:36:02,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:02,171 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 143 transitions. [2021-11-12 22:36:02,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:36:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 143 transitions. [2021-11-12 22:36:02,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-12 22:36:02,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:02,173 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:02,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:02,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:02,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-12 22:36:02,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:02,779 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:02,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:02,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1549749125, now seen corresponding path program 1 times [2021-11-12 22:36:02,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:02,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131220303] [2021-11-12 22:36:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:02,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:02,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:02,782 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:02,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:36:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:02,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-12 22:36:02,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:03,937 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:36:03,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-12 22:36:05,558 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:05,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131220303] [2021-11-12 22:36:05,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131220303] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:36:05,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:36:05,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 24 [2021-11-12 22:36:05,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389874313] [2021-11-12 22:36:05,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:05,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:36:05,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:05,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:36:05,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-11-12 22:36:05,561 INFO L87 Difference]: Start difference. First operand 104 states and 143 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:36:06,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:06,603 INFO L93 Difference]: Finished difference Result 124 states and 174 transitions. [2021-11-12 22:36:06,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:36:06,604 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2021-11-12 22:36:06,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:06,605 INFO L225 Difference]: With dead ends: 124 [2021-11-12 22:36:06,606 INFO L226 Difference]: Without dead ends: 107 [2021-11-12 22:36:06,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-11-12 22:36:06,608 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 61 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 537.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.97ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 602.23ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:06,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 709 Invalid, 483 Unknown, 0 Unchecked, 4.97ms Time], IncrementalHoareTripleChecker [9 Valid, 399 Invalid, 0 Unknown, 75 Unchecked, 602.23ms Time] [2021-11-12 22:36:06,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-12 22:36:06,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2021-11-12 22:36:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 66 states have internal predecessors, (83), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (23), 23 states have call predecessors, (23), 19 states have call successors, (23) [2021-11-12 22:36:06,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 125 transitions. [2021-11-12 22:36:06,621 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 125 transitions. Word has length 49 [2021-11-12 22:36:06,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:06,622 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 125 transitions. [2021-11-12 22:36:06,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:36:06,622 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 125 transitions. [2021-11-12 22:36:06,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-12 22:36:06,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:06,624 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:06,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:06,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:06,835 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:06,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:06,835 INFO L85 PathProgramCache]: Analyzing trace with hash -250451865, now seen corresponding path program 1 times [2021-11-12 22:36:06,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:06,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626430631] [2021-11-12 22:36:06,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:06,837 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:06,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:06,838 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:06,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:36:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:06,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:36:06,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-12 22:36:07,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:36:07,529 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:07,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626430631] [2021-11-12 22:36:07,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626430631] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:36:07,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:36:07,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 12 [2021-11-12 22:36:07,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053226525] [2021-11-12 22:36:07,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:07,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:36:07,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:07,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:36:07,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:36:07,531 INFO L87 Difference]: Start difference. First operand 92 states and 125 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:36:07,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:07,935 INFO L93 Difference]: Finished difference Result 161 states and 213 transitions. [2021-11-12 22:36:07,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:36:07,935 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 50 [2021-11-12 22:36:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:07,937 INFO L225 Difference]: With dead ends: 161 [2021-11-12 22:36:07,937 INFO L226 Difference]: Without dead ends: 108 [2021-11-12 22:36:07,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:36:07,938 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 54 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 176.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.80ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 204.49ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:07,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 352 Invalid, 153 Unknown, 0 Unchecked, 2.80ms Time], IncrementalHoareTripleChecker [14 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 204.49ms Time] [2021-11-12 22:36:07,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-12 22:36:07,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 92. [2021-11-12 22:36:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.2058823529411764) internal successors, (82), 66 states have internal predecessors, (82), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (23), 23 states have call predecessors, (23), 19 states have call successors, (23) [2021-11-12 22:36:07,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 124 transitions. [2021-11-12 22:36:07,948 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 124 transitions. Word has length 50 [2021-11-12 22:36:07,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:07,948 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 124 transitions. [2021-11-12 22:36:07,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-12 22:36:07,949 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 124 transitions. [2021-11-12 22:36:07,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-12 22:36:07,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:07,950 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:07,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:08,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:08,156 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:08,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:08,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1451512262, now seen corresponding path program 1 times [2021-11-12 22:36:08,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:08,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136602635] [2021-11-12 22:36:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:08,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:08,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:08,158 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:08,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 22:36:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:08,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 22:36:08,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:36:09,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:36:10,684 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:10,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136602635] [2021-11-12 22:36:10,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136602635] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:10,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1414600539] [2021-11-12 22:36:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:10,685 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:10,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:10,687 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:10,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 22:36:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:11,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 22:36:11,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:36:11,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:36:12,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1414600539] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:12,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876364821] [2021-11-12 22:36:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:12,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:12,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:36:12,761 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:36:12,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-12 22:36:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:12,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-12 22:36:12,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:36:13,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-12 22:36:14,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876364821] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:14,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:36:14,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 16, 15] total 31 [2021-11-12 22:36:14,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676352131] [2021-11-12 22:36:14,751 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:36:14,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-12 22:36:14,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:14,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-12 22:36:14,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-11-12 22:36:14,752 INFO L87 Difference]: Start difference. First operand 92 states and 124 transitions. Second operand has 31 states, 30 states have (on average 2.1) internal successors, (63), 24 states have internal predecessors, (63), 4 states have call successors, (11), 2 states have call predecessors, (11), 7 states have return successors, (18), 10 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:36:16,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:16,910 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2021-11-12 22:36:16,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-12 22:36:16,911 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 24 states have internal predecessors, (63), 4 states have call successors, (11), 2 states have call predecessors, (11), 7 states have return successors, (18), 10 states have call predecessors, (18), 4 states have call successors, (18) Word has length 55 [2021-11-12 22:36:16,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:16,912 INFO L225 Difference]: With dead ends: 162 [2021-11-12 22:36:16,912 INFO L226 Difference]: Without dead ends: 99 [2021-11-12 22:36:16,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 291 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=366, Invalid=1986, Unknown=0, NotChecked=0, Total=2352 [2021-11-12 22:36:16,914 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 265 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 745.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.36ms SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 838.49ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:16,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 582 Invalid, 744 Unknown, 0 Unchecked, 11.36ms Time], IncrementalHoareTripleChecker [120 Valid, 576 Invalid, 0 Unknown, 48 Unchecked, 838.49ms Time] [2021-11-12 22:36:16,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-12 22:36:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2021-11-12 22:36:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2021-11-12 22:36:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 118 transitions. [2021-11-12 22:36:16,925 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 118 transitions. Word has length 55 [2021-11-12 22:36:16,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:16,926 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 118 transitions. [2021-11-12 22:36:16,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 24 states have internal predecessors, (63), 4 states have call successors, (11), 2 states have call predecessors, (11), 7 states have return successors, (18), 10 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-12 22:36:16,926 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 118 transitions. [2021-11-12 22:36:16,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-12 22:36:16,928 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:16,928 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:16,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-12 22:36:17,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-12 22:36:17,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:17,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:17,555 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:17,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:17,556 INFO L85 PathProgramCache]: Analyzing trace with hash 784008833, now seen corresponding path program 1 times [2021-11-12 22:36:17,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:17,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381615792] [2021-11-12 22:36:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:17,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:17,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:17,559 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:17,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 22:36:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:17,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:36:17,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:36:17,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:36:18,255 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:18,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381615792] [2021-11-12 22:36:18,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381615792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:18,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2118784869] [2021-11-12 22:36:18,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:18,256 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:18,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:18,257 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:18,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-12 22:36:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:18,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:36:18,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 22:36:18,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 22:36:18,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2118784869] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:36:18,622 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 22:36:18,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9, 10] total 14 [2021-11-12 22:36:18,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279565372] [2021-11-12 22:36:18,623 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:18,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:36:18,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:18,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:36:18,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:36:18,625 INFO L87 Difference]: Start difference. First operand 90 states and 118 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:36:18,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:18,652 INFO L93 Difference]: Finished difference Result 137 states and 175 transitions. [2021-11-12 22:36:18,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:36:18,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 56 [2021-11-12 22:36:18,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:18,654 INFO L225 Difference]: With dead ends: 137 [2021-11-12 22:36:18,654 INFO L226 Difference]: Without dead ends: 90 [2021-11-12 22:36:18,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-12 22:36:18,656 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 4 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.53ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.91ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:18,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 183 Invalid, 13 Unknown, 0 Unchecked, 0.53ms Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 8.91ms Time] [2021-11-12 22:36:18,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-12 22:36:18,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-12 22:36:18,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 19 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2021-11-12 22:36:18,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 117 transitions. [2021-11-12 22:36:18,665 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 117 transitions. Word has length 56 [2021-11-12 22:36:18,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:18,665 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 117 transitions. [2021-11-12 22:36:18,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-12 22:36:18,666 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 117 transitions. [2021-11-12 22:36:18,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-12 22:36:18,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:18,667 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:18,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:18,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:19,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:19,079 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:19,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:19,080 INFO L85 PathProgramCache]: Analyzing trace with hash -373470327, now seen corresponding path program 1 times [2021-11-12 22:36:19,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:19,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874498057] [2021-11-12 22:36:19,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:19,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:19,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:19,081 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:19,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-12 22:36:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:19,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:36:19,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:36:19,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:36:19,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:19,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874498057] [2021-11-12 22:36:19,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874498057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:19,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1962545319] [2021-11-12 22:36:19,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:19,647 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:19,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:19,648 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:19,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-12 22:36:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:20,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-12 22:36:20,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-12 22:36:20,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:36:20,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1962545319] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:20,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338000201] [2021-11-12 22:36:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:20,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:20,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:36:20,463 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:36:20,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-12 22:36:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:20,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:36:20,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 22:36:20,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 22:36:21,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338000201] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:36:21,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:36:21,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9, 11, 10] total 23 [2021-11-12 22:36:21,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560708312] [2021-11-12 22:36:21,378 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:36:21,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-12 22:36:21,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:21,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-12 22:36:21,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:36:21,380 INFO L87 Difference]: Start difference. First operand 90 states and 117 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 15 states have internal predecessors, (63), 4 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (20), 12 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-12 22:36:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:22,592 INFO L93 Difference]: Finished difference Result 118 states and 149 transitions. [2021-11-12 22:36:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 22:36:22,593 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 15 states have internal predecessors, (63), 4 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (20), 12 states have call predecessors, (20), 4 states have call successors, (20) Word has length 56 [2021-11-12 22:36:22,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:22,594 INFO L225 Difference]: With dead ends: 118 [2021-11-12 22:36:22,594 INFO L226 Difference]: Without dead ends: 99 [2021-11-12 22:36:22,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2021-11-12 22:36:22,596 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 170 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 453.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.65ms SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 503.96ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:22,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 608 Invalid, 503 Unknown, 0 Unchecked, 3.65ms Time], IncrementalHoareTripleChecker [96 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 503.96ms Time] [2021-11-12 22:36:22,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-12 22:36:22,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2021-11-12 22:36:22,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) [2021-11-12 22:36:22,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2021-11-12 22:36:22,605 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 56 [2021-11-12 22:36:22,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:22,606 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2021-11-12 22:36:22,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 15 states have internal predecessors, (63), 4 states have call successors, (14), 2 states have call predecessors, (14), 6 states have return successors, (20), 12 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-12 22:36:22,606 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2021-11-12 22:36:22,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 22:36:22,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:22,608 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:22,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-12 22:36:22,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-11-12 22:36:23,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:23,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:23,223 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:23,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:23,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2059347801, now seen corresponding path program 1 times [2021-11-12 22:36:23,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:23,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684060209] [2021-11-12 22:36:23,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:23,224 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:23,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:23,225 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:23,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-12 22:36:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:23,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:36:23,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 22:36:23,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-12 22:36:24,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:24,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684060209] [2021-11-12 22:36:24,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684060209] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:36:24,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:36:24,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-11-12 22:36:24,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712275991] [2021-11-12 22:36:24,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:24,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 22:36:24,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:24,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 22:36:24,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:36:24,063 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 22:36:24,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:24,244 INFO L93 Difference]: Finished difference Result 89 states and 111 transitions. [2021-11-12 22:36:24,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:36:24,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2021-11-12 22:36:24,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:24,245 INFO L225 Difference]: With dead ends: 89 [2021-11-12 22:36:24,245 INFO L226 Difference]: Without dead ends: 72 [2021-11-12 22:36:24,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:36:24,247 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 17 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.27ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.12ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:24,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 269 Invalid, 78 Unknown, 0 Unchecked, 1.27ms Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 101.12ms Time] [2021-11-12 22:36:24,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-12 22:36:24,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-12 22:36:24,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 52 states have internal predecessors, (60), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (17), 17 states have call predecessors, (17), 15 states have call successors, (17) [2021-11-12 22:36:24,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2021-11-12 22:36:24,255 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 62 [2021-11-12 22:36:24,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:24,256 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2021-11-12 22:36:24,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 22:36:24,256 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2021-11-12 22:36:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-12 22:36:24,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:24,258 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:24,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-11-12 22:36:24,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:24,467 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:24,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:24,467 INFO L85 PathProgramCache]: Analyzing trace with hash 253909467, now seen corresponding path program 1 times [2021-11-12 22:36:24,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:24,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076714372] [2021-11-12 22:36:24,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:24,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:24,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:24,469 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:24,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-12 22:36:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:24,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:36:24,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:36:24,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 22:36:25,494 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:25,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076714372] [2021-11-12 22:36:25,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076714372] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:36:25,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:36:25,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 17 [2021-11-12 22:36:25,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504166773] [2021-11-12 22:36:25,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:36:25,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:36:25,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:36:25,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:36:25,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:36:25,497 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 22:36:25,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:36:25,924 INFO L93 Difference]: Finished difference Result 102 states and 128 transitions. [2021-11-12 22:36:25,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 22:36:25,925 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2021-11-12 22:36:25,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:36:25,926 INFO L225 Difference]: With dead ends: 102 [2021-11-12 22:36:25,926 INFO L226 Difference]: Without dead ends: 74 [2021-11-12 22:36:25,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-11-12 22:36:25,927 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 40 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 255.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.15ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 299.94ms IncrementalHoareTripleChecker+Time [2021-11-12 22:36:25,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 312 Invalid, 200 Unknown, 0 Unchecked, 2.15ms Time], IncrementalHoareTripleChecker [0 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 299.94ms Time] [2021-11-12 22:36:25,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-12 22:36:25,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-11-12 22:36:25,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 15 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (19), 17 states have call predecessors, (19), 15 states have call successors, (19) [2021-11-12 22:36:25,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2021-11-12 22:36:25,936 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 62 [2021-11-12 22:36:25,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:36:25,936 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2021-11-12 22:36:25,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-12 22:36:25,937 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2021-11-12 22:36:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-12 22:36:25,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:36:25,938 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:25,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:26,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:36:26,139 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:36:26,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:36:26,139 INFO L85 PathProgramCache]: Analyzing trace with hash 647887735, now seen corresponding path program 1 times [2021-11-12 22:36:26,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:36:26,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999835086] [2021-11-12 22:36:26,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:26,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:36:26,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:36:26,140 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:36:26,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 22:36:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:26,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:36:26,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:36:26,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:27,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:36:27,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999835086] [2021-11-12 22:36:27,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [__fpclassify_float_~w~0] [2021-11-12 22:36:27,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1774994808] [2021-11-12 22:36:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:27,175 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:36:27,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:36:27,177 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:36:27,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-12 22:36:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:27,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:36:27,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:27,872 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:36:27,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:28,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [__fpclassify_float_~w~0] [2021-11-12 22:36:28,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253707738] [2021-11-12 22:36:28,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:36:28,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:28,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:36:28,435 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:36:28,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-12 22:36:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:36:28,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 22:36:28,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:36:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:36:28,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:36:29,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [__fpclassify_float_~w~0] [2021-11-12 22:36:29,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:36:29,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-12 22:36:29,145 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-11-12 22:36:29,145 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-12 22:36:29,153 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-12 22:36:29,155 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-12 22:36:29,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:29,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-12 22:36:29,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-12 22:36:29,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:36:29,762 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:36:29,765 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 22:36:29,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 10:36:29 BoogieIcfgContainer [2021-11-12 22:36:29,786 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-12 22:36:29,787 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-12 22:36:29,787 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-12 22:36:29,787 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-12 22:36:29,788 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:35:28" (3/4) ... [2021-11-12 22:36:29,791 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-12 22:36:29,792 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-12 22:36:29,792 INFO L158 Benchmark]: Toolchain (without parser) took 62516.97ms. Allocated memory was 86.0MB in the beginning and 117.4MB in the end (delta: 31.5MB). Free memory was 51.3MB in the beginning and 49.1MB in the end (delta: 2.2MB). Peak memory consumption was 35.3MB. Max. memory is 16.1GB. [2021-11-12 22:36:29,793 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 86.0MB. Free memory was 67.7MB in the beginning and 67.6MB in the end (delta: 75.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:36:29,793 INFO L158 Benchmark]: CACSL2BoogieTranslator took 408.73ms. Allocated memory is still 86.0MB. Free memory was 51.1MB in the beginning and 65.3MB in the end (delta: -14.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 22:36:29,794 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.66ms. Allocated memory is still 86.0MB. Free memory was 65.3MB in the beginning and 63.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:36:29,794 INFO L158 Benchmark]: Boogie Preprocessor took 78.43ms. Allocated memory is still 86.0MB. Free memory was 63.4MB in the beginning and 62.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-12 22:36:29,795 INFO L158 Benchmark]: RCFGBuilder took 575.18ms. Allocated memory is still 86.0MB. Free memory was 62.0MB in the beginning and 48.7MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 22:36:29,795 INFO L158 Benchmark]: TraceAbstraction took 61364.62ms. Allocated memory was 86.0MB in the beginning and 117.4MB in the end (delta: 31.5MB). Free memory was 48.0MB in the beginning and 49.1MB in the end (delta: -1.1MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2021-11-12 22:36:29,796 INFO L158 Benchmark]: Witness Printer took 4.87ms. Allocated memory is still 117.4MB. Free memory is still 49.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:36:29,798 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 86.0MB. Free memory was 67.7MB in the beginning and 67.6MB in the end (delta: 75.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 408.73ms. Allocated memory is still 86.0MB. Free memory was 51.1MB in the beginning and 65.3MB in the end (delta: -14.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.66ms. Allocated memory is still 86.0MB. Free memory was 65.3MB in the beginning and 63.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 78.43ms. Allocated memory is still 86.0MB. Free memory was 63.4MB in the beginning and 62.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 575.18ms. Allocated memory is still 86.0MB. Free memory was 62.0MB in the beginning and 48.7MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 61364.62ms. Allocated memory was 86.0MB in the beginning and 117.4MB in the end (delta: 31.5MB). Free memory was 48.0MB in the beginning and 49.1MB in the end (delta: -1.1MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Witness Printer took 4.87ms. Allocated memory is still 117.4MB. Free memory is still 49.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 83]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L68] float x = __VERIFIER_nondet_float(); [L69] float y = __VERIFIER_nondet_float(); [L70] CALL, EXPR isnan_float(x) [L59] return x != x; [L70] RET, EXPR isnan_float(x) [L70] EXPR isnan_float(x) && !isnan_float(y) [L70-L71] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L71] CALL, EXPR isnan_float(x) [L59] return x != x; [L71] RET, EXPR isnan_float(x) [L71] EXPR !isnan_float(x) && isnan_float(y) [L71] CALL, EXPR isnan_float(y) [L59] return x != x; [L71] RET, EXPR isnan_float(y) [L71] EXPR !isnan_float(x) && isnan_float(y) [L70-L71] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L70-L71] COND TRUE (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L73] CALL, EXPR fmin_float(x, y) [L38] CALL, EXPR __fpclassify_float(x) [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; [L38] RET, EXPR __fpclassify_float(x) [L38] COND FALSE !(__fpclassify_float(x) == 0) [L40] CALL, EXPR __fpclassify_float(y) [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND TRUE (w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff) [L27] return 4; [L40] RET, EXPR __fpclassify_float(y) [L40] COND FALSE !(__fpclassify_float(y) == 0) [L43] EXPR x < y ? x : y [L43] return x < y ? x : y; [L73] RET, EXPR fmin_float(x, y) [L73] float res = fmin_float(x, y); [L76] CALL, EXPR isnan_float(x) [L59] return x != x; [L76] RET, EXPR isnan_float(x) [L76] EXPR isnan_float(x) && !isnan_float(y) [L76] COND FALSE !(isnan_float(x) && !isnan_float(y) && res != y) [L82] CALL, EXPR isnan_float(x) [L59] return x != x; [L82] RET, EXPR isnan_float(x) [L82] EXPR !isnan_float(x) && isnan_float(y) [L82] CALL, EXPR isnan_float(y) [L59] return x != x; [L82] RET, EXPR isnan_float(y) [L82] EXPR !isnan_float(x) && isnan_float(y) [L82] COND TRUE !isnan_float(x) && isnan_float(y) && res != x [L83] reach_error() - UnprovableResult [Line: 77]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 55 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 61.3s, OverallIterations: 19, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 11.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1166 SdHoareTripleChecker+Valid, 6192.37ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1114 mSDsluCounter, 7540 SdHoareTripleChecker+Invalid, 5567.10ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 371 IncrementalHoareTripleChecker+Unchecked, 6430 mSDsCounter, 439 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3221 IncrementalHoareTripleChecker+Invalid, 4031 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 439 mSolverCounterUnsat, 1110 mSDtfsCounter, 3221 mSolverCounterSat, 75.30ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3168 GetRequests, 2792 SyntacticMatches, 8 SemanticMatches, 368 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 13.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=10, InterpolantAutomatonStates: 191, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 18 MinimizatonAttempts, 193 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 35.0s InterpolantComputationTime, 1629 NumberOfCodeBlocks, 1629 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 3128 ConstructedInterpolants, 74 QuantifiedInterpolants, 10310 SizeOfPredicates, 236 NumberOfNonLiveVariables, 3788 ConjunctsInSsa, 424 ConjunctsInUnsatCore, 67 InterpolantComputations, 23 PerfectInterpolantSequences, 1569/1803 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-12 22:36:29,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9fad04f-fd05-40b2-8a86-c3b03816a43f/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN